Jupiter: continuum polarization calibration 6.4.1

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DISCLAIMER
This is an advanced reference guide to calibration and imaging of pre-upgrade VLA polarimetric data with CASA 6.4.1. If you are a beginning or novice user, please consult relevant CASA guides first.


Data Download and Import

This CASA guide discusses how to set the flux scale for calibration of an archival VLA multi-band data set, taken in D-configuration (15 April 1999), with a resolution of around 14 arcsec. The original observation included several planets, among them was Jupiter in C-band (6cm), which will be the focus of this guide.


Downloading Options

The data set for this tutorial can be downloaded from the NRAO Archive Access Tool (AAT) by searching on FLUX99 in the top search bar. You will see one data set to download, FLUX99_1_51283.96221_51284.96001.exp. There are two approaches to downloading this data set. Since this is a very small data set, it should only take about a minute.

  • You may download the data set without logging in to your my.nrao.edu account. You will receive an email with instructions on how to retrieve the data.
  • Or, login to the AAT with your my.nrao.edu username and password to make use of the NRAO lustre system. You will receive an email with instructions on how to retrieve the data directly or the path you chose for the data to be downloaded to. Note, you will need to have an active nm-account and a directory the AAT can write to (e.g., chmod 777 directory). Once the data has completed its download into your nm-account on lustre, you will need to cd into several directories starting with a string of numbers, then a *.exp/ directory, and then another *.exp/ directory, to then find the .exp file. For ease of use and finding again, you may want to consider moving this file into the top level of the directory you created to work with this file.

If you need help with this step, please contact us through the NRAO Science Helpdesk under the VLA/VLBA Archive and Data Retrieval department.


Running CASA

To choose which version of CASA you wish to use, type:

casa -ls

To run the CASA version used in this guide, type:

casa -r 6.4.1-12-pipeline-2022.2.0.64

Importing Data

CASA task importvla will read the .exp file format and create a CASA native measurement set (MS).

importvla(archivefiles='FLUX99_1_51283.96221_51284.96001.exp', vis='FLUX99.ms')

Use listobs to check the observation setup and print verbose summary of the observations to the CASA logger. The listfile input parameter is optional, but is good practice to print the listobs output to a text file for future reference.

listobs(vis='FLUX99.ms',listfile='FLUX99.txt')

The output of this task is fairly long, the abridged version is shown below since we will use this to determine which sources and spectral windows (spws) to split out for a simplified data set.

##########################################
##### Begin Task: listobs            #####

   Observer: unavailable     Project: FLUX99  
Observation: VLA
Data records: 9778860       Total elapsed time = 86210 seconds
   Observed from   15-Apr-1999/23:06:06.7   to   16-Apr-1999/23:02:56.7 (TAI)

   ObservationID = 0         ArrayID = 0
  Date        Timerange (TAI)          Scan  FldId FieldName             nRows     SpwIds   Average Interval(s)    ScanIntent
  15-Apr-1999/23:06:06.7 - 23:13:30.0     1      0 0137+331                 93366  [0,1]  [3.33, 3.33] 
              23:13:36.7 - 23:15:00.0     2      0 0137+331                 17550  [2,3]  [3.33, 3.33] 
              23:15:16.7 - 23:16:10.0     3      0 0137+331                 11232  [4,5]  [3.33, 3.33] 
              23:19:06.7 - 23:20:20.0     4      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              23:20:36.7 - 23:21:30.0     5      0 0137+331                 11232  [8,9]  [3.33, 3.33] 
              23:21:46.7 - 23:22:50.0     6      0 0137+331                 13338  [10,11]  [3.33, 3.33] 
              23:23:06.7 - 23:24:10.0     7      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              23:38:26.7 - 23:48:00.0     8      1 0813+482                120744  [4,5]  [3.33, 3.33] 
              23:48:06.7 - 23:49:30.0     9      1 0813+482                 17550  [2,3]  [3.33, 3.33] 
              23:49:36.7 - 23:50:50.0    10      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              23:51:06.7 - 23:52:00.0    11      1 0813+482                 11232  [6,7]  [3.33, 3.33] 
              23:53:36.7 - 23:55:20.0    12      2 0542+498                 21762  [4,5]  [3.33, 3.33] 
              23:55:26.7 - 23:56:50.0    13      2 0542+498                 17550  [0,1]  [3.33, 3.33] 
              23:56:56.7 - 23:58:00.0    14      2 0542+498                 13338  [2,3]  [3.33, 3.33] 
  16-Apr-1999/00:01:06.7 - 00:02:10.0    15      2 0542+498                 13338  [6,7]  [3.33, 3.33] 
              00:02:26.7 - 00:03:30.0    16      2 0542+498                 13338  [8,9]  [3.33, 3.33] 
              00:03:46.7 - 00:04:40.0    17      2 0542+498                 11232  [10,11]  [3.33, 3.33] 
              00:04:56.7 - 00:06:00.0    18      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              00:11:56.7 - 00:13:10.0    19      3 0521+166                 15444  [2,3]  [3.33, 3.33] 
              00:16:06.7 - 00:17:10.0    20      3 0521+166                 13338  [6,7]  [3.33, 3.33] 
              00:17:26.7 - 00:18:30.0    21      3 0521+166                 13338  [8,9]  [3.33, 3.33] 
              00:18:46.7 - 00:19:50.0    22      3 0521+166                 13338  [10,11]  [3.33, 3.33] 
              00:20:06.7 - 00:21:10.0    23      3 0521+166                 13338  [12,13]  [3.33, 3.33] 
              00:22:06.7 - 00:23:50.0    24      4 0437+296                 21762  [4,5]  [3.33, 3.33] 
              00:23:56.7 - 00:25:10.0    25      4 0437+296                 15444  [0,1]  [3.33, 3.33] 
              00:25:16.7 - 00:26:30.0    26      4 0437+296                 15444  [2,3]  [3.33, 3.33] 
              00:26:46.7 - 00:27:50.0    27      4 0437+296                 13338  [6,7]  [3.33, 3.33] 
              00:28:16.7 - 00:30:00.0    28      5 VENUS_0                  21762  [4,5]  [3.33, 3.33] 
              00:30:06.7 - 00:31:20.0    29      5 VENUS_0                  15444  [2,3]  [3.33, 3.33] 
              00:34:26.7 - 00:35:40.0    30      5 VENUS_0                  15444  [6,7]  [3.33, 3.33] 
              00:35:56.7 - 00:37:00.0    31      5 VENUS_0                  13338  [8,9]  [3.33, 3.33] 
              00:37:16.7 - 00:38:20.0    32      5 VENUS_0                  13338  [10,11]  [3.33, 3.33] 
              00:38:36.7 - 00:39:40.0    33      5 VENUS_0                  13338  [12,13]  [3.33, 3.33] 
              00:42:26.7 - 00:43:30.0    34      6 0319+415                 13338  [8,9]  [3.33, 3.33] 
              00:43:46.7 - 00:44:50.0    35      6 0319+415                 13338  [10,11]  [3.33, 3.33] 
              00:45:06.7 - 00:46:10.0    36      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              00:48:36.7 - 00:50:20.0    37      1 0813+482                 21762  [4,5]  [3.33, 3.33] 
              00:50:26.7 - 00:51:50.0    38      1 0813+482                 17550  [2,3]  [3.33, 3.33] 
              00:51:56.7 - 00:53:00.0    39      1 0813+482                 13338  [0,1]  [3.33, 3.33] 
              00:53:16.7 - 00:54:20.0    40      1 0813+482                 13338  [6,7]  [3.33, 3.33] 
              00:56:06.7 - 00:57:50.0    41      2 0542+498                 21762  [4,5]  [3.33, 3.33] 
              00:57:56.7 - 00:59:10.0    42      2 0542+498                 15444  [0,1]  [3.33, 3.33] 
              00:59:16.7 - 01:00:30.0    43      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              01:03:26.7 - 01:04:40.0    44      2 0542+498                 15444  [6,7]  [3.33, 3.33] 
              01:04:56.7 - 01:05:50.0    45      2 0542+498                 11232  [8,9]  [3.33, 3.33] 
              01:06:06.7 - 01:07:10.0    46      2 0542+498                 13338  [10,11]  [3.33, 3.33] 
              01:07:26.7 - 01:08:30.0    47      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              01:10:16.7 - 01:12:00.0    48      3 0521+166                 21762  [4,5]  [3.33, 3.33] 
              01:12:06.7 - 01:13:20.0    49      3 0521+166                 15444  [0,1]  [3.33, 3.33] 
              01:13:26.7 - 01:14:40.0    50      3 0521+166                 15444  [2,3]  [3.33, 3.33] 
              01:17:36.7 - 01:18:40.0    51      3 0521+166                 13338  [6,7]  [3.33, 3.33] 
              01:18:56.7 - 01:20:00.0    52      3 0521+166                 13338  [8,9]  [3.33, 3.33] 
              01:20:16.7 - 01:21:20.0    53      3 0521+166                 13338  [10,11]  [3.33, 3.33] 
              01:21:36.7 - 01:22:40.0    54      3 0521+166                 13338  [12,13]  [3.33, 3.33] 
              01:23:26.7 - 01:25:00.0    55      4 0437+296                 19656  [4,5]  [3.33, 3.33] 
              01:25:06.7 - 01:26:20.0    56      4 0437+296                 15444  [0,1]  [3.33, 3.33] 
              01:26:26.7 - 01:27:40.0    57      4 0437+296                 15444  [2,3]  [3.33, 3.33] 
              01:27:56.7 - 01:29:00.0    58      4 0437+296                 13338  [6,7]  [3.33, 3.33] 
              01:29:26.7 - 01:31:10.0    59      7 VENUS_1                  21762  [4,5]  [3.33, 3.33] 
              01:31:16.7 - 01:32:40.0    60      7 VENUS_1                  17550  [2,3]  [3.33, 3.33] 
              01:35:36.7 - 01:36:50.0    61      7 VENUS_1                  15444  [6,7]  [3.33, 3.33] 
              01:37:06.7 - 01:38:10.0    62      7 VENUS_1                  13338  [8,9]  [3.33, 3.33] 
              01:38:26.7 - 01:39:30.0    63      8 VENUS_2                  13338  [10,11]  [3.33, 3.33] 
              01:39:46.7 - 01:40:50.0    64      8 VENUS_2                  13338  [12,13]  [3.33, 3.33] 
              01:43:26.7 - 01:44:30.0    65      6 0319+415                 13338  [8,9]  [3.33, 3.33] 
              01:44:46.7 - 01:45:50.0    66      6 0319+415                 13338  [10,11]  [3.33, 3.33] 
              01:46:06.7 - 01:47:10.0    67      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              01:49:46.7 - 01:51:30.0    68      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              01:51:36.7 - 01:53:00.0    69      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              01:53:06.7 - 01:54:10.0    70      9 1411+522                 13338  [2,3]  [3.33, 3.33] 
              01:57:06.7 - 01:58:20.0    71      9 1411+522                 15444  [6,7]  [3.33, 3.33] 
              01:58:36.7 - 01:59:40.0    72      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              01:59:56.7 - 02:00:50.0    73      9 1411+522                 11232  [10,11]  [3.33, 3.33] 
              02:01:06.7 - 02:02:10.0    74      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              02:02:56.7 - 02:04:30.0    75     10 1331+305                 19656  [4,5]  [3.33, 3.33] 
              02:04:36.7 - 02:05:50.0    76     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              02:05:56.7 - 02:07:10.0    77     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              02:10:06.7 - 02:11:20.0    78     10 1331+305                 15444  [6,7]  [3.33, 3.33] 
              02:11:36.7 - 02:12:30.0    79     10 1331+305                 11232  [8,9]  [3.33, 3.33] 
              02:12:46.7 - 02:13:50.0    80     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              02:14:06.7 - 02:15:10.0    81     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              02:17:26.7 - 02:19:10.0    82      1 0813+482                 21762  [4,5]  [3.33, 3.33] 
              02:19:16.7 - 02:20:30.0    83      1 0813+482                 15444  [2,3]  [3.33, 3.33] 
              02:20:36.7 - 02:21:50.0    84      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              02:22:06.7 - 02:23:10.0    85      1 0813+482                 13338  [6,7]  [3.33, 3.33] 
              02:24:16.7 - 02:26:00.0    86      2 0542+498                 21762  [4,5]  [3.33, 3.33] 
              02:26:06.7 - 02:27:30.0    87      2 0542+498                 17550  [0,1]  [3.33, 3.33] 
              02:27:36.7 - 02:28:50.0    88      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              02:31:36.7 - 02:32:40.0    89      2 0542+498                 13338  [6,7]  [3.33, 3.33] 
              02:32:56.7 - 02:34:00.0    90      2 0542+498                 13338  [8,9]  [3.33, 3.33] 
              02:34:16.7 - 02:35:20.0    91      2 0542+498                 13338  [10,11]  [3.33, 3.33] 
              02:35:36.7 - 02:36:40.0    92      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              02:37:46.7 - 02:39:30.0    93      3 0521+166                 21762  [4,5]  [3.33, 3.33] 
              02:39:36.7 - 02:41:00.0    94      3 0521+166                 17550  [0,1]  [3.33, 3.33] 
              02:41:06.7 - 02:42:20.0    95      3 0521+166                 15444  [2,3]  [3.33, 3.33] 
              02:45:06.7 - 02:46:20.0    96      3 0521+166                 15444  [6,7]  [3.33, 3.33] 
              02:46:36.7 - 02:47:40.0    97      3 0521+166                 13338  [8,9]  [3.33, 3.33] 
              02:47:56.7 - 02:48:50.0    98      3 0521+166                 11232  [10,11]  [3.33, 3.33] 
              02:49:06.7 - 02:50:10.0    99      3 0521+166                 13338  [12,13]  [3.33, 3.33] 
              02:50:46.7 - 02:52:20.0   100      4 0437+296                 19656  [4,5]  [3.33, 3.33] 
              02:52:26.7 - 02:53:50.0   101      4 0437+296                 17550  [0,1]  [3.33, 3.33] 
              02:53:56.7 - 02:55:00.0   102      4 0437+296                 13338  [2,3]  [3.33, 3.33] 
              02:55:16.7 - 02:56:20.0   103      4 0437+296                 13338  [6,7]  [3.33, 3.33] 
              02:59:16.7 - 03:01:00.0   104      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              03:01:06.7 - 03:02:20.0   105      9 1411+522                 15444  [0,1]  [3.33, 3.33] 
              03:02:26.7 - 03:03:40.0   106      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              03:06:36.7 - 03:07:40.0   107      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              03:07:56.7 - 03:09:00.0   108      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              03:09:16.7 - 03:10:20.0   109      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              03:10:36.7 - 03:11:40.0   110      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              03:12:26.7 - 03:14:10.0   111     10 1331+305                 21762  [4,5]  [3.33, 3.33] 
              03:14:16.7 - 03:15:30.0   112     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              03:15:36.7 - 03:16:50.0   113     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              03:19:46.7 - 03:20:50.0   114     10 1331+305                 13338  [6,7]  [3.33, 3.33] 
              03:21:06.7 - 03:22:10.0   115     10 1331+305                 13338  [8,9]  [3.33, 3.33] 
              03:22:26.7 - 03:23:30.0   116     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              03:23:46.7 - 03:24:50.0   117     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              03:27:46.7 - 03:29:40.0   118      1 0813+482                 23868  [4,5]  [3.33, 3.33] 
              03:29:46.7 - 03:31:00.0   119      1 0813+482                 15444  [2,3]  [3.33, 3.33] 
              03:31:06.7 - 03:32:20.0   120      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              03:32:36.7 - 03:33:40.0   121      1 0813+482                 13338  [6,7]  [3.33, 3.33] 
              03:34:56.7 - 03:36:40.0   122      2 0542+498                 21762  [4,5]  [3.33, 3.33] 
              03:36:46.7 - 03:38:00.0   123      2 0542+498                 15444  [0,1]  [3.33, 3.33] 
              03:38:06.7 - 03:39:20.0   124      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              03:42:16.7 - 03:43:20.0   125      2 0542+498                 13338  [6,7]  [3.33, 3.33] 
              03:43:36.7 - 03:44:40.0   126      2 0542+498                 13338  [8,9]  [3.33, 3.33] 
              03:44:56.7 - 03:46:00.0   127      2 0542+498                 13338  [10,11]  [3.33, 3.33] 
              03:46:16.7 - 03:47:20.0   128      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              03:49:46.7 - 03:51:30.0   129      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              03:51:36.7 - 03:53:00.0   130      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              03:53:06.7 - 03:54:20.0   131      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              03:57:06.7 - 03:58:10.0   132      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              03:58:26.7 - 03:59:30.0   133      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              03:59:46.7 - 04:00:50.0   134      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              04:01:06.7 - 04:02:10.0   135      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              04:03:06.7 - 04:04:50.0   136     10 1331+305                 21762  [4,5]  [3.33, 3.33] 
              04:04:56.7 - 04:06:20.0   137     10 1331+305                 17550  [0,1]  [3.33, 3.33] 
              04:06:26.7 - 04:07:30.0   138     10 1331+305                 13338  [2,3]  [3.33, 3.33] 
              04:10:26.7 - 04:11:40.0   139     10 1331+305                 15444  [6,7]  [3.33, 3.33] 
              04:11:56.7 - 04:13:00.0   140     10 1331+305                 13338  [8,9]  [3.33, 3.33] 
              04:13:16.7 - 04:14:10.0   141     10 1331+305                 11232  [10,11]  [3.33, 3.33] 
              04:14:26.7 - 04:15:30.0   142     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              04:18:46.7 - 04:20:40.0   143      1 0813+482                 23868  [4,5]  [3.33, 3.33] 
              04:20:46.7 - 04:22:00.0   144      1 0813+482                 15444  [2,3]  [3.33, 3.33] 
              04:22:06.7 - 04:23:20.0   145      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              04:23:36.7 - 04:24:40.0   146      1 0813+482                 13338  [6,7]  [3.33, 3.33] 
              04:25:46.7 - 04:27:40.0   147      2 0542+498                 23868  [4,5]  [3.33, 3.33] 
              04:27:46.7 - 04:29:10.0   148      2 0542+498                 17550  [0,1]  [3.33, 3.33] 
              04:29:16.7 - 04:30:30.0   149      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              04:33:16.7 - 04:34:20.0   150      2 0542+498                 13338  [6,7]  [3.33, 3.33] 
              04:34:36.7 - 04:35:40.0   151      2 0542+498                 13338  [8,9]  [3.33, 3.33] 
              04:35:56.7 - 04:37:00.0   152      2 0542+498                 13338  [10,11]  [3.33, 3.33] 
              04:37:16.7 - 04:38:20.0   153      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              04:42:46.7 - 04:44:40.0   154     11 MARS_0                   23868  [4,5]  [3.33, 3.33] 
              04:44:50.0 - 04:46:00.0   155     12 MARS_1                   14742  [2,3]  [3.33, 3.33] 
              04:49:16.7 - 04:50:40.0   156     13 MARS_2                   17550  [6,7]  [3.33, 3.33] 
              04:50:56.7 - 04:52:00.0   157     13 MARS_2                   13338  [8,9]  [3.33, 3.33] 
              04:52:16.7 - 04:53:20.0   158     14 MARS_3                   13338  [10,11]  [3.33, 3.33] 
              04:53:36.7 - 04:54:40.0   159     14 MARS_3                   13338  [12,13]  [3.33, 3.33] 
              04:56:46.7 - 04:58:30.0   160      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              04:58:36.7 - 05:00:00.0   161      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              05:00:06.7 - 05:01:20.0   162      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              05:04:06.7 - 05:05:10.0   163      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              05:05:26.7 - 05:06:30.0   164      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              05:06:46.7 - 05:07:50.0   165      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              05:08:06.7 - 05:09:10.0   166      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              05:23:56.7 - 05:33:40.0   167     10 1331+305                122850  [4,5]  [3.33, 3.33] 
              05:33:46.7 - 05:35:00.0   168     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              05:35:06.7 - 05:36:20.0   169     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              05:39:16.7 - 05:40:20.0   170     10 1331+305                 13338  [6,7]  [3.33, 3.33] 
              05:40:36.7 - 05:41:40.0   171     10 1331+305                 13338  [8,9]  [3.33, 3.33] 
              05:41:56.7 - 05:43:00.0   172     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              05:43:16.7 - 05:44:20.0   173     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              05:47:56.7 - 05:49:50.0   174      1 0813+482                 23868  [4,5]  [3.33, 3.33] 
              05:49:56.7 - 05:51:10.0   175      1 0813+482                 15444  [2,3]  [3.33, 3.33] 
              05:51:16.7 - 05:52:30.0   176      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              05:52:46.7 - 05:53:50.0   177      1 0813+482                 13338  [6,7]  [3.33, 3.33] 
              05:58:26.7 - 06:00:30.0   178     15 MARS_4                   25974  [4,5]  [3.33, 3.33] 
              06:00:36.7 - 06:02:00.0   179     16 MARS_5                   17550  [2,3]  [3.33, 3.33] 
              06:05:06.7 - 06:06:30.0   180     17 MARS_6                   17550  [6,7]  [3.33, 3.33] 
              06:06:46.7 - 06:08:00.0   181     17 MARS_6                   15444  [8,9]  [3.33, 3.33] 
              06:08:16.7 - 06:09:20.0   182     18 MARS_7                   13338  [10,11]  [3.33, 3.33] 
              06:09:36.7 - 06:10:30.0   183     18 MARS_7                   11232  [12,13]  [3.33, 3.33] 
              06:13:16.7 - 06:15:00.0   184      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              06:15:06.7 - 06:16:20.0   185      9 1411+522                 15444  [0,1]  [3.33, 3.33] 
              06:16:26.7 - 06:17:40.0   186      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              06:20:36.7 - 06:21:40.0   187      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              06:21:56.7 - 06:23:00.0   188      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              06:23:16.7 - 06:24:20.0   189      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              06:24:36.7 - 06:25:40.0   190      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              06:27:36.7 - 06:29:20.0   191     10 1331+305                 21762  [4,5]  [3.33, 3.33] 
              06:29:26.7 - 06:30:40.0   192     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              06:30:46.7 - 06:32:00.0   193     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              06:34:56.7 - 06:36:00.0   194     10 1331+305                 13338  [6,7]  [3.33, 3.33] 
              06:36:16.7 - 06:37:20.0   195     10 1331+305                 13338  [8,9]  [3.33, 3.33] 
              06:37:36.7 - 06:38:40.0   196     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              06:38:56.7 - 06:40:00.0   197     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              06:44:06.7 - 06:46:00.0   198      1 0813+482                 23868  [4,5]  [3.33, 3.33] 
              06:46:06.7 - 06:47:20.0   199      1 0813+482                 15444  [2,3]  [3.33, 3.33] 
              06:47:26.7 - 06:48:40.0   200      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              06:48:56.7 - 06:50:00.0   201      1 0813+482                 13338  [6,7]  [3.33, 3.33] 
              06:54:56.7 - 06:57:00.0   202     19 MARS_8                   25974  [4,5]  [3.33, 3.33] 
              06:57:06.7 - 06:58:20.0   203     20 MARS_9                   15444  [2,3]  [3.33, 3.33] 
              07:01:36.7 - 07:03:00.0   204     21 MARS_10                  17550  [6,7]  [3.33, 3.33] 
              07:03:16.7 - 07:04:20.0   205     22 MARS_11                  13338  [8,9]  [3.33, 3.33] 
              07:04:36.7 - 07:05:40.0   206     22 MARS_11                  13338  [10,11]  [3.33, 3.33] 
              07:05:56.7 - 07:07:00.0   207     23 MARS_12                  13338  [12,13]  [3.33, 3.33] 
              07:10:36.7 - 07:12:20.0   208      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              07:12:26.7 - 07:13:50.0   209      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              07:13:56.7 - 07:15:10.0   210      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              07:17:56.7 - 07:19:00.0   211      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              07:19:16.7 - 07:20:20.0   212      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              07:20:36.7 - 07:21:40.0   213      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              07:21:56.7 - 07:23:00.0   214      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              07:28:16.7 - 07:30:10.0   215     10 1331+305                 23868  [4,5]  [3.33, 3.33] 
              07:30:16.7 - 07:31:30.0   216     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              07:31:36.7 - 07:32:50.0   217     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              07:35:46.7 - 07:36:50.0   218     10 1331+305                 13338  [6,7]  [3.33, 3.33] 
              07:37:06.7 - 07:38:10.0   219     10 1331+305                 13338  [8,9]  [3.33, 3.33] 
              07:38:26.7 - 07:39:30.0   220     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              07:39:46.7 - 07:40:50.0   221     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              07:42:46.7 - 07:44:30.0   222     24 MARS_13                  21762  [4,5]  [3.33, 3.33] 
              07:44:36.7 - 07:46:00.0   223     24 MARS_13                  17550  [2,3]  [3.33, 3.33] 
              07:49:06.7 - 07:50:30.0   224     25 MARS_14                  17550  [6,7]  [3.33, 3.33] 
              07:50:46.7 - 07:52:00.0   225     25 MARS_14                  15444  [8,9]  [3.33, 3.33] 
              07:52:16.7 - 07:53:10.0   226     26 MARS_15                  11232  [10,11]  [3.33, 3.33] 
              07:53:26.7 - 07:54:30.0   227     26 MARS_15                  13338  [12,13]  [3.33, 3.33] 
              07:58:36.7 - 08:00:40.0   228      9 1411+522                 25974  [4,5]  [3.33, 3.33] 
              08:00:46.7 - 08:02:00.0   229      9 1411+522                 15444  [0,1]  [3.33, 3.33] 
              08:02:06.7 - 08:03:20.0   230      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              08:06:16.7 - 08:07:20.0   231      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              08:07:36.7 - 08:08:40.0   232      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              08:08:56.7 - 08:10:00.0   233      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              08:10:16.7 - 08:11:20.0   234      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              08:13:26.7 - 08:15:20.0   235     10 1331+305                 23868  [4,5]  [3.33, 3.33] 
              08:15:26.7 - 08:16:50.0   236     10 1331+305                 17550  [0,1]  [3.33, 3.33] 
              08:16:56.7 - 08:18:00.0   237     10 1331+305                 13338  [2,3]  [3.33, 3.33] 
              08:20:56.7 - 08:22:10.0   238     10 1331+305                 15444  [6,7]  [3.33, 3.33] 
              08:22:26.7 - 08:23:20.0   239     10 1331+305                 11232  [8,9]  [3.33, 3.33] 
              08:23:36.7 - 08:24:40.0   240     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              08:24:56.7 - 08:26:00.0   241     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              08:27:46.7 - 08:29:30.0   242     27 MARS_16                  21762  [4,5]  [3.33, 3.33] 
              08:29:36.7 - 08:30:50.0   243     27 MARS_16                  15444  [2,3]  [3.33, 3.33] 
              08:34:06.7 - 08:35:30.0   244     28 MARS_17                  17550  [6,7]  [3.33, 3.33] 
              08:35:46.7 - 08:36:50.0   245     28 MARS_17                  13338  [8,9]  [3.33, 3.33] 
              08:37:06.7 - 08:38:10.0   246     28 MARS_17                  13338  [10,11]  [3.33, 3.33] 
              08:38:26.7 - 08:39:30.0   247     29 MARS_18                  13338  [12,13]  [3.33, 3.33] 
              08:42:56.7 - 08:44:50.0   248      9 1411+522                 23868  [4,5]  [3.33, 3.33] 
              08:44:56.7 - 08:46:20.0   249      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              08:46:26.7 - 08:47:30.0   250      9 1411+522                 13338  [2,3]  [3.33, 3.33] 
              08:50:26.7 - 08:51:40.0   251      9 1411+522                 15444  [6,7]  [3.33, 3.33] 
              08:51:56.7 - 08:53:00.0   252      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              08:53:16.7 - 08:54:10.0   253      9 1411+522                 11232  [10,11]  [3.33, 3.33] 
              08:54:26.7 - 08:55:30.0   254      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              08:57:06.7 - 08:58:50.0   255     10 1331+305                 21762  [4,5]  [3.33, 3.33] 
              08:58:56.7 - 09:00:10.0   256     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              09:00:16.7 - 09:01:30.0   257     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              09:04:26.7 - 09:05:40.0   258     10 1331+305                 15444  [6,7]  [3.33, 3.33] 
              09:05:56.7 - 09:06:50.0   259     10 1331+305                 11232  [8,9]  [3.33, 3.33] 
              09:07:06.7 - 09:08:10.0   260     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              09:08:26.7 - 09:09:30.0   261     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              09:12:56.7 - 09:14:50.0   262     30 NGC7027                  23868  [4,5]  [3.33, 3.33] 
              09:14:56.7 - 09:16:20.0   263     30 NGC7027                  17550  [2,3]  [3.33, 3.33] 
              09:19:16.7 - 09:20:40.0   264     30 NGC7027                  17550  [6,7]  [3.33, 3.33] 
              09:20:56.7 - 09:22:10.0   265     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              09:22:26.7 - 09:23:30.0   266     30 NGC7027                  13338  [10,11]  [3.33, 3.33] 
              09:23:46.7 - 09:24:40.0   267     30 NGC7027                  11232  [12,13]  [3.33, 3.33] 
              09:26:56.7 - 09:28:40.0   268      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              09:28:46.7 - 09:30:10.0   269      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              09:30:16.7 - 09:31:20.0   270      9 1411+522                 13338  [2,3]  [3.33, 3.33] 
              09:34:16.7 - 09:35:30.0   271      9 1411+522                 15444  [6,7]  [3.33, 3.33] 
              09:35:46.7 - 09:36:40.0   272      9 1411+522                 11232  [8,9]  [3.33, 3.33] 
              09:36:56.7 - 09:38:00.0   273      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              09:38:16.7 - 09:39:20.0   274      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              09:40:26.7 - 09:42:10.0   275     10 1331+305                 21762  [4,5]  [3.33, 3.33] 
              09:42:16.7 - 09:43:30.0   276     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              09:43:36.7 - 09:44:50.0   277     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              09:47:46.7 - 09:48:50.0   278     10 1331+305                 13338  [6,7]  [3.33, 3.33] 
              09:49:06.7 - 09:50:10.0   279     10 1331+305                 13338  [8,9]  [3.33, 3.33] 
              09:50:26.7 - 09:51:30.0   280     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              09:51:46.7 - 09:52:50.0   281     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              09:56:16.7 - 09:58:10.0   282     30 NGC7027                  23868  [4,5]  [3.33, 3.33] 
              09:58:16.7 - 09:59:40.0   283     30 NGC7027                  17550  [2,3]  [3.33, 3.33] 
              10:02:46.7 - 10:04:10.0   284     30 NGC7027                  17550  [6,7]  [3.33, 3.33] 
              10:04:26.7 - 10:05:40.0   285     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              10:05:56.7 - 10:06:50.0   286     30 NGC7027                  11232  [10,11]  [3.33, 3.33] 
              10:07:06.7 - 10:08:10.0   287     30 NGC7027                  13338  [12,13]  [3.33, 3.33] 
              10:12:56.7 - 10:14:50.0   288     31 MARS_19                  23868  [4,5]  [3.33, 3.33] 
              10:14:56.7 - 10:16:20.0   289     32 MARS_20                  17550  [2,3]  [3.33, 3.33] 
              10:19:26.7 - 10:20:50.0   290     33 MARS_21                  17550  [6,7]  [3.33, 3.33] 
              10:21:06.7 - 10:22:20.0   291     33 MARS_21                  15444  [8,9]  [3.33, 3.33] 
              10:22:36.7 - 10:23:40.0   292     34 MARS_22                  13338  [10,11]  [3.33, 3.33] 
              10:23:56.7 - 10:24:50.0   293     34 MARS_22                  11232  [12,13]  [3.33, 3.33] 
              10:27:06.7 - 10:28:50.0   294      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              10:28:56.7 - 10:30:20.0   295      9 1411+522                 17550  [0,1]  [3.33, 3.33] 
              10:30:26.7 - 10:31:30.0   296      9 1411+522                 13338  [2,3]  [3.33, 3.33] 
              10:34:26.7 - 10:35:40.0   297      9 1411+522                 15444  [6,7]  [3.33, 3.33] 
              10:35:56.7 - 10:37:00.0   298      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              10:37:16.7 - 10:38:10.0   299      9 1411+522                 11232  [10,11]  [3.33, 3.33] 
              10:38:26.7 - 10:39:30.0   300      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              10:40:26.7 - 10:42:00.0   301     10 1331+305                 19656  [4,5]  [3.33, 3.33] 
              10:42:06.7 - 10:43:20.0   302     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              10:43:26.7 - 10:44:40.0   303     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              10:47:36.7 - 10:48:50.0   304     10 1331+305                 15444  [6,7]  [3.33, 3.33] 
              10:49:06.7 - 10:50:00.0   305     10 1331+305                 11232  [8,9]  [3.33, 3.33] 
              10:50:16.7 - 10:51:20.0   306     10 1331+305                 13338  [10,11]  [3.33, 3.33] 
              10:51:36.7 - 10:52:40.0   307     10 1331+305                 13338  [12,13]  [3.33, 3.33] 
              10:56:06.7 - 10:57:50.0   308     30 NGC7027                  21762  [4,5]  [3.33, 3.33] 
              10:57:56.7 - 10:59:20.0   309     30 NGC7027                  17550  [2,3]  [3.33, 3.33] 
              11:02:26.7 - 11:03:50.0   310     30 NGC7027                  17550  [6,7]  [3.33, 3.33] 
              11:04:06.7 - 11:05:20.0   311     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              11:05:36.7 - 11:06:40.0   312     30 NGC7027                  13338  [10,11]  [3.33, 3.33] 
              11:06:56.7 - 11:07:50.0   313     30 NGC7027                  11232  [12,13]  [3.33, 3.33] 
              11:28:26.7 - 11:35:30.0   314     35 NEPTUNE_0                89154  [4,5]  [3.33, 3.33] 
              11:38:46.7 - 11:40:10.0   315     35 NEPTUNE_0                16848  [6,7]  [3.33, 3.33] 
              11:40:26.7 - 11:41:40.0   316     35 NEPTUNE_0                15444  [8,9]  [3.33, 3.33] 
              11:41:56.7 - 11:43:00.0   317     36 NEPTUNE_1                13338  [10,11]  [3.33, 3.33] 
              11:43:16.7 - 11:44:10.0   318     36 NEPTUNE_1                11232  [12,13]  [3.33, 3.33] 
              11:48:16.7 - 11:50:10.0   319      9 1411+522                 23868  [4,5]  [3.33, 3.33] 
              11:50:16.7 - 11:51:30.0   320      9 1411+522                 15444  [0,1]  [3.33, 3.33] 
              11:51:36.7 - 11:52:50.0   321      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              11:55:46.7 - 11:56:50.0   322      9 1411+522                 13338  [6,7]  [3.33, 3.33] 
              11:57:06.7 - 11:58:10.0   323      9 1411+522                 13338  [8,9]  [3.33, 3.33] 
              11:58:26.7 - 11:59:30.0   324      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              11:59:46.7 - 12:00:50.0   325      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              12:01:26.7 - 12:03:10.0   326     10 1331+305                 21762  [4,5]  [3.33, 3.33] 
              12:03:16.7 - 12:04:30.0   327     10 1331+305                 15444  [0,1]  [3.33, 3.33] 
              12:04:36.7 - 12:05:50.0   328     10 1331+305                 15444  [2,3]  [3.33, 3.33] 
              12:08:46.7 - 12:15:20.0   329     10 1331+305                 12636  [6,7]  [3.33, 3.33] 
              12:18:56.7 - 12:20:20.0   330     30 NGC7027                  17550  [2,3]  [3.33, 3.33] 
              12:23:36.7 - 12:24:50.0   331     30 NGC7027                  15444  [6,7]  [3.33, 3.33] 
              12:25:06.7 - 12:26:20.0   332     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              12:26:36.7 - 12:27:30.0   333     30 NGC7027                  11232  [10,11]  [3.33, 3.33] 
              12:27:46.7 - 12:28:50.0   334     30 NGC7027                  13338  [12,13]  [3.33, 3.33] 
              12:35:26.7 - 12:37:40.0   335     37 URANUS_0                 28080  [4,5]  [3.33, 3.33] 
              12:40:46.7 - 12:42:00.0   336     38 URANUS_1                 15444  [6,7]  [3.33, 3.33] 
              12:42:16.7 - 12:43:30.0   337     39 URANUS_2                 15444  [8,9]  [3.33, 3.33] 
              12:43:46.7 - 12:44:50.0   338     39 URANUS_2                 13338  [10,11]  [3.33, 3.33] 
              12:45:06.7 - 12:46:00.0   339     40 URANUS_3                 11232  [12,13]  [3.33, 3.33] 
              12:46:26.7 - 12:48:10.0   340     41 NEPTUNE_2                21762  [4,5]  [3.33, 3.33] 
              12:51:16.7 - 12:52:40.0   341     41 NEPTUNE_2                17550  [6,7]  [3.33, 3.33] 
              12:52:56.7 - 12:54:00.0   342     41 NEPTUNE_2                13338  [8,9]  [3.33, 3.33] 
              12:54:16.7 - 12:55:20.0   343     41 NEPTUNE_2                13338  [10,11]  [3.33, 3.33] 
              12:55:36.7 - 12:56:40.0   344     41 NEPTUNE_2                13338  [12,13]  [3.33, 3.33] 
              13:00:26.7 - 13:02:10.0   345      9 1411+522                 21762  [4,5]  [3.33, 3.33] 
              13:02:16.7 - 13:03:30.0   346      9 1411+522                 15444  [0,1]  [3.33, 3.33] 
              13:03:36.7 - 13:04:50.0   347      9 1411+522                 15444  [2,3]  [3.33, 3.33] 
              13:07:46.7 - 13:09:00.0   348      9 1411+522                 15444  [6,7]  [3.33, 3.33] 
              13:09:16.7 - 13:10:10.0   349      9 1411+522                 11232  [8,9]  [3.33, 3.33] 
              13:10:26.7 - 13:11:30.0   350      9 1411+522                 13338  [10,11]  [3.33, 3.33] 
              13:11:46.7 - 13:12:50.0   351      9 1411+522                 13338  [12,13]  [3.33, 3.33] 
              13:15:16.7 - 13:17:10.0   352     30 NGC7027                  23868  [4,5]  [3.33, 3.33] 
              13:17:16.7 - 13:18:30.0   353     30 NGC7027                  15444  [2,3]  [3.33, 3.33] 
              13:22:06.7 - 13:23:30.0   354     30 NGC7027                  17550  [6,7]  [3.33, 3.33] 
              13:23:46.7 - 13:25:00.0   355     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              13:25:16.7 - 13:26:20.0   356     30 NGC7027                  13338  [10,11]  [3.33, 3.33] 
              13:26:36.7 - 13:27:30.0   357     30 NGC7027                  11232  [12,13]  [3.33, 3.33] 
              13:30:16.7 - 13:35:40.0   358     42 URANUS_4                 68094  [4,5]  [3.33, 3.33] 
              13:38:46.7 - 13:40:00.0   359     42 URANUS_4                 15444  [6,7]  [3.33, 3.33] 
              13:40:16.7 - 13:41:20.0   360     42 URANUS_4                 13338  [8,9]  [3.33, 3.33] 
              13:41:36.7 - 13:42:40.0   361     43 URANUS_5                 13338  [10,11]  [3.33, 3.33] 
              13:42:56.7 - 13:44:00.0   362     43 URANUS_5                 13338  [12,13]  [3.33, 3.33] 
              13:44:26.7 - 13:46:10.0   363     44 NEPTUNE_3                21762  [4,5]  [3.33, 3.33] 
              13:49:16.7 - 13:50:30.0   364     45 NEPTUNE_4                15444  [6,7]  [3.33, 3.33] 
              13:50:46.7 - 13:51:50.0   365     45 NEPTUNE_4                13338  [8,9]  [3.33, 3.33] 
              13:52:06.7 - 13:53:10.0   366     45 NEPTUNE_4                13338  [10,11]  [3.33, 3.33] 
              13:53:26.7 - 13:54:30.0   367     46 NEPTUNE_5                13338  [12,13]  [3.33, 3.33] 
              13:57:06.7 - 13:59:00.0   368      0 0137+331                 23868  [0,1]  [3.33, 3.33] 
              13:59:06.7 - 14:00:20.0   369      0 0137+331                 15444  [2,3]  [3.33, 3.33] 
              14:00:36.7 - 14:01:40.0   370      0 0137+331                 13338  [4,5]  [3.33, 3.33] 
              14:04:36.7 - 14:05:40.0   371      0 0137+331                 13338  [6,7]  [3.33, 3.33] 
              14:05:56.7 - 14:07:00.0   372      0 0137+331                 13338  [8,9]  [3.33, 3.33] 
              14:07:16.7 - 14:08:20.0   373      0 0137+331                 13338  [10,11]  [3.33, 3.33] 
              14:08:36.7 - 14:09:40.0   374      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              14:10:36.7 - 14:12:10.0   375     47 JUPITER_0                19656  [4,5]  [3.33, 3.33] 
              14:12:16.7 - 14:13:40.0   376     48 JUPITER_1                17550  [2,3]  [3.33, 3.33] 
              14:16:36.7 - 14:18:10.0   377     49 JUPITER_2                19656  [6,7]  [3.33, 3.33] 
              14:18:26.7 - 14:19:40.0   378     49 JUPITER_2                15444  [8,9]  [3.33, 3.33] 
              14:19:56.7 - 14:21:00.0   379     50 JUPITER_3                13338  [10,11]  [3.33, 3.33] 
              14:21:16.7 - 14:22:20.0   380     50 JUPITER_3                13338  [12,13]  [3.33, 3.33] 
              14:23:56.7 - 14:25:40.0   381     51 URANUS_6                 21762  [4,5]  [3.33, 3.33] 
              14:28:46.7 - 14:30:00.0   382     52 URANUS_7                 15444  [6,7]  [3.33, 3.33] 
              14:30:16.7 - 14:31:20.0   383     52 URANUS_7                 13338  [8,9]  [3.33, 3.33] 
              14:31:36.7 - 14:32:40.0   384     53 URANUS_8                 13338  [10,11]  [3.33, 3.33] 
              14:32:56.7 - 14:34:00.0   385     53 URANUS_8                 13338  [12,13]  [3.33, 3.33] 
              14:34:26.7 - 14:36:10.0   386     54 NEPTUNE_6                21762  [4,5]  [3.33, 3.33] 
              14:39:16.7 - 14:40:30.0   387     55 NEPTUNE_7                15444  [6,7]  [3.33, 3.33] 
              14:40:46.7 - 14:41:50.0   388     55 NEPTUNE_7                13338  [8,9]  [3.33, 3.33] 
              14:42:06.7 - 14:43:10.0   389     56 NEPTUNE_8                13338  [10,11]  [3.33, 3.33] 
              14:43:26.7 - 14:44:30.0   390     56 NEPTUNE_8                13338  [12,13]  [3.33, 3.33] 
              14:51:06.7 - 14:52:20.0   391      6 0319+415                 15444  [8,9]  [3.33, 3.33] 
              14:52:36.7 - 14:53:30.0   392      6 0319+415                 11232  [10,11]  [3.33, 3.33] 
              14:53:46.7 - 14:54:50.0   393      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              14:55:36.7 - 14:57:20.0   394      0 0137+331                 21762  [0,1]  [3.33, 3.33] 
              14:57:26.7 - 14:58:50.0   395      0 0137+331                 17550  [2,3]  [3.33, 3.33] 
              14:59:06.7 - 15:00:00.0   396      0 0137+331                 11232  [4,5]  [3.33, 3.33] 
              15:02:56.7 - 15:04:10.0   397      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              15:04:26.7 - 15:05:20.0   398      0 0137+331                 11232  [8,9]  [3.33, 3.33] 
              15:05:36.7 - 15:06:40.0   399      0 0137+331                 13338  [10,11]  [3.33, 3.33] 
              15:06:56.7 - 15:08:00.0   400      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              15:08:56.7 - 15:10:40.0   401     57 JUPITER_4                21762  [4,5]  [3.33, 3.33] 
              15:10:46.7 - 15:12:00.0   402     47 JUPITER_0                15444  [2,3]  [3.33, 3.33] 
              15:15:16.7 - 15:16:40.0   403     58 JUPITER_5                17550  [6,7]  [3.33, 3.33] 
              15:16:56.7 - 15:18:00.0   404     58 JUPITER_5                13338  [8,9]  [3.33, 3.33] 
              15:18:16.7 - 15:19:20.0   405     59 JUPITER_6                13338  [10,11]  [3.33, 3.33] 
              15:19:36.7 - 15:20:40.0   406     59 JUPITER_6                13338  [12,13]  [3.33, 3.33] 
              15:24:26.7 - 15:26:20.0   407     30 NGC7027                  23868  [4,5]  [3.33, 3.33] 
              15:26:26.7 - 15:27:40.0   408     30 NGC7027                  15444  [2,3]  [3.33, 3.33] 
              15:31:46.7 - 15:33:10.0   409     30 NGC7027                  17550  [6,7]  [3.33, 3.33] 
              15:33:26.7 - 15:34:40.0   410     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              15:34:56.7 - 15:35:50.0   411     30 NGC7027                  11232  [10,11]  [3.33, 3.33] 
              15:36:06.7 - 15:37:10.0   412     30 NGC7027                  13338  [12,13]  [3.33, 3.33] 
              15:39:36.7 - 15:45:00.0   413     60 URANUS_9                 68094  [4,5]  [3.33, 3.33] 
              15:48:06.7 - 15:49:20.0   414     61 URANUS_10                15444  [6,7]  [3.33, 3.33] 
              15:49:36.7 - 15:50:40.0   415     61 URANUS_10                13338  [8,9]  [3.33, 3.33] 
              15:50:56.7 - 15:52:00.0   416     62 URANUS_11                13338  [10,11]  [3.33, 3.33] 
              15:52:16.7 - 15:53:20.0   417     62 URANUS_11                13338  [12,13]  [3.33, 3.33] 
              15:53:46.7 - 15:55:20.0   418     45 NEPTUNE_4                19656  [4,5]  [3.33, 3.33] 
              15:58:26.7 - 15:59:40.0   419     63 NEPTUNE_9                15444  [6,7]  [3.33, 3.33] 
              15:59:56.7 - 16:01:00.0   420     63 NEPTUNE_9                13338  [8,9]  [3.33, 3.33] 
              16:01:16.7 - 16:02:20.0   421     63 NEPTUNE_9                13338  [10,11]  [3.33, 3.33] 
              16:02:36.7 - 16:03:40.0   422     63 NEPTUNE_9                13338  [12,13]  [3.33, 3.33] 
              16:10:46.7 - 16:12:00.0   423      6 0319+415                 15444  [8,9]  [3.33, 3.33] 
              16:12:16.7 - 16:13:10.0   424      6 0319+415                 11232  [10,11]  [3.33, 3.33] 
              16:13:26.7 - 16:14:30.0   425      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              16:15:26.7 - 16:17:10.0   426      0 0137+331                 21060  [0,1]  [3.33, 3.33] 
              16:17:16.7 - 16:18:30.0   427      0 0137+331                 15444  [2,3]  [3.33, 3.33] 
              16:18:46.7 - 16:19:50.0   428      0 0137+331                 13338  [4,5]  [3.33, 3.33] 
              16:22:46.7 - 16:24:00.0   429      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              16:24:16.7 - 16:25:10.0   430      0 0137+331                 11232  [8,9]  [3.33, 3.33] 
              16:25:26.7 - 16:26:30.0   431      0 0137+331                 13338  [10,11]  [3.33, 3.33] 
              16:26:46.7 - 16:27:50.0   432      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              16:29:06.7 - 16:30:50.0   433     64 JUPITER_7                21762  [4,5]  [3.33, 3.33] 
              16:30:56.7 - 16:32:10.0   434     65 JUPITER_8                15444  [2,3]  [3.33, 3.33] 
              16:35:26.7 - 16:36:50.0   435     66 JUPITER_9                17550  [6,7]  [3.33, 3.33] 
              16:37:06.7 - 16:38:10.0   436     67 JUPITER_10               13338  [8,9]  [3.33, 3.33] 
              16:38:26.7 - 16:39:30.0   437     68 JUPITER_11               13338  [10,11]  [3.33, 3.33] 
              16:39:46.7 - 16:40:50.0   438     69 JUPITER_12               13338  [12,13]  [3.33, 3.33] 
              16:42:46.7 - 16:44:30.0   439     70 URANUS_12                21762  [4,5]  [3.33, 3.33] 
              16:47:36.7 - 16:48:50.0   440     71 URANUS_13                15444  [6,7]  [3.33, 3.33] 
              16:49:06.7 - 16:50:10.0   441     72 URANUS_14                13338  [8,9]  [3.33, 3.33] 
              16:50:26.7 - 16:51:30.0   442     62 URANUS_11                13338  [10,11]  [3.33, 3.33] 
              16:51:46.7 - 16:52:50.0   443     62 URANUS_11                13338  [12,13]  [3.33, 3.33] 
              16:54:46.7 - 16:56:40.0   444     30 NGC7027                  23868  [4,5]  [3.33, 3.33] 
              16:56:46.7 - 16:58:10.0   445     30 NGC7027                  17550  [2,3]  [3.33, 3.33] 
              17:01:26.7 - 17:02:40.0   446     30 NGC7027                  15444  [6,7]  [3.33, 3.33] 
              17:02:56.7 - 17:04:10.0   447     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              17:04:26.7 - 17:05:30.0   448     30 NGC7027                  13338  [10,11]  [3.33, 3.33] 
              17:05:46.7 - 17:06:40.0   449     30 NGC7027                  11232  [12,13]  [3.33, 3.33] 
              17:22:56.7 - 17:30:40.0   450      2 0542+498                 97578  [4,5]  [3.33, 3.33] 
              17:30:46.7 - 17:32:00.0   451      2 0542+498                 15444  [0,1]  [3.33, 3.33] 
              17:32:06.7 - 17:33:20.0   452      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              17:35:56.7 - 17:37:10.0   453      2 0542+498                 15444  [6,7]  [3.33, 3.33] 
              17:37:26.7 - 17:38:20.0   454      2 0542+498                 11232  [8,9]  [3.33, 3.33] 
              17:38:36.7 - 17:39:40.0   455      2 0542+498                 13338  [10,11]  [3.33, 3.33] 
              17:39:56.7 - 17:41:00.0   456      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              17:41:46.7 - 17:43:20.0   457      4 0437+296                 19656  [4,5]  [3.33, 3.33] 
              17:43:30.0 - 17:44:40.0   458      4 0437+296                 14742  [0,1]  [3.33, 3.33] 
              17:44:46.7 - 17:46:00.0   459      4 0437+296                 15444  [2,3]  [3.33, 3.33] 
              17:46:16.7 - 17:47:20.0   460      4 0437+296                 13338  [6,7]  [3.33, 3.33] 
              17:55:26.7 - 17:57:40.0   461     73 VENUS_3                  28080  [4,5]  [3.33, 3.33] 
              17:57:46.7 - 17:59:10.0   462     74 VENUS_4                  17550  [2,3]  [3.33, 3.33] 
              18:02:06.7 - 18:03:20.0   463     75 VENUS_5                  15444  [6,7]  [3.33, 3.33] 
              18:03:36.7 - 18:04:40.0   464     76 VENUS_6                  13338  [8,9]  [3.33, 3.33] 
              18:04:56.7 - 18:06:00.0   465     77 VENUS_7                  13338  [10,11]  [3.33, 3.33] 
              18:06:16.7 - 18:07:20.0   466     78 VENUS_8                  13338  [12,13]  [3.33, 3.33] 
              18:11:06.7 - 18:12:20.0   467      6 0319+415                 15444  [8,9]  [3.33, 3.33] 
              18:12:36.7 - 18:13:40.0   468      6 0319+415                 13338  [10,11]  [3.33, 3.33] 
              18:13:56.7 - 18:14:50.0   469      6 0319+415                 11232  [12,13]  [3.33, 3.33] 
              18:15:46.7 - 18:17:30.0   470      0 0137+331                 21762  [0,1]  [3.33, 3.33] 
              18:17:36.7 - 18:19:00.0   471      0 0137+331                 17550  [2,3]  [3.33, 3.33] 
              18:19:16.7 - 18:20:10.0   472      0 0137+331                 11232  [4,5]  [3.33, 3.33] 
              18:23:06.7 - 18:24:20.0   473      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              18:24:36.7 - 18:25:40.0   474      0 0137+331                 13338  [8,9]  [3.33, 3.33] 
              18:25:56.7 - 18:26:50.0   475      0 0137+331                 11232  [10,11]  [3.33, 3.33] 
              18:27:06.7 - 18:28:10.0   476      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              18:30:16.7 - 18:32:00.0   477     79 JUPITER_13               21762  [4,5]  [3.33, 3.33] 
              18:32:06.7 - 18:33:20.0   478     80 JUPITER_14               15444  [2,3]  [3.33, 3.33] 
              18:36:36.7 - 18:38:00.0   479     81 JUPITER_15               17550  [6,7]  [3.33, 3.33] 
              18:38:16.7 - 18:39:20.0   480     82 JUPITER_16               13338  [8,9]  [3.33, 3.33] 
              18:39:36.7 - 18:40:40.0   481     82 JUPITER_16               13338  [10,11]  [3.33, 3.33] 
              18:40:56.7 - 18:42:00.0   482     82 JUPITER_16               13338  [12,13]  [3.33, 3.33] 
              18:44:46.7 - 18:46:30.0   483     30 NGC7027                  21762  [4,5]  [3.33, 3.33] 
              18:46:36.7 - 18:48:00.0   484     30 NGC7027                  17550  [2,3]  [3.33, 3.33] 
              18:51:06.7 - 18:52:30.0   485     30 NGC7027                  17550  [6,7]  [3.33, 3.33] 
              18:52:46.7 - 18:54:00.0   486     30 NGC7027                  15444  [8,9]  [3.33, 3.33] 
              18:54:16.7 - 18:55:20.0   487     30 NGC7027                  13338  [10,11]  [3.33, 3.33] 
              18:55:36.7 - 18:56:30.0   488     30 NGC7027                  11232  [12,13]  [3.33, 3.33] 
              18:59:06.7 - 19:01:00.0   489      2 0542+498                 23868  [4,5]  [3.33, 3.33] 
              19:01:06.7 - 19:02:20.0   490      2 0542+498                 15444  [0,1]  [3.33, 3.33] 
              19:02:26.7 - 19:03:40.0   491      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              19:06:36.7 - 19:07:50.0   492      2 0542+498                 15444  [6,7]  [3.33, 3.33] 
              19:08:06.7 - 19:09:00.0   493      2 0542+498                 11232  [8,9]  [3.33, 3.33] 
              19:09:16.7 - 19:10:20.0   494      2 0542+498                 13338  [10,11]  [3.33, 3.33] 
              19:10:36.7 - 19:11:40.0   495      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              19:18:56.7 - 19:21:20.0   496      3 0521+166                 30186  [4,5]  [3.33, 3.33] 
              19:21:26.7 - 19:22:40.0   497      3 0521+166                 15444  [0,1]  [3.33, 3.33] 
              19:22:46.7 - 19:24:00.0   498      3 0521+166                 15444  [2,3]  [3.33, 3.33] 
              19:26:56.7 - 19:28:00.0   499      3 0521+166                 13338  [6,7]  [3.33, 3.33] 
              19:28:16.7 - 19:29:20.0   500      3 0521+166                 13338  [8,9]  [3.33, 3.33] 
              19:29:36.7 - 19:30:40.0   501      3 0521+166                 13338  [10,11]  [3.33, 3.33] 
              19:30:56.7 - 19:32:00.0   502      3 0521+166                 13338  [12,13]  [3.33, 3.33] 
              19:32:46.7 - 19:34:30.0   503      4 0437+296                 21762  [4,5]  [3.33, 3.33] 
              19:34:36.7 - 19:35:50.0   504      4 0437+296                 15444  [0,1]  [3.33, 3.33] 
              19:35:56.7 - 19:37:10.0   505      4 0437+296                 15444  [2,3]  [3.33, 3.33] 
              19:37:26.7 - 19:38:30.0   506      4 0437+296                 13338  [6,7]  [3.33, 3.33] 
              19:38:56.7 - 19:40:40.0   507     83 VENUS_9                  21762  [4,5]  [3.33, 3.33] 
              19:40:46.7 - 19:42:00.0   508     84 VENUS_10                 15444  [2,3]  [3.33, 3.33] 
              19:45:16.7 - 19:46:40.0   509     85 VENUS_11                 17550  [6,7]  [3.33, 3.33] 
              19:46:56.7 - 19:48:00.0   510     86 VENUS_12                 13338  [8,9]  [3.33, 3.33] 
              19:48:16.7 - 19:49:20.0   511     87 VENUS_13                 13338  [10,11]  [3.33, 3.33] 
              19:49:36.7 - 19:50:40.0   512     88 VENUS_14                 13338  [12,13]  [3.33, 3.33] 
              19:55:16.7 - 19:56:30.0   513      6 0319+415                 15444  [8,9]  [3.33, 3.33] 
              19:56:46.7 - 19:57:40.0   514      6 0319+415                 11232  [10,11]  [3.33, 3.33] 
              19:57:56.7 - 19:59:00.0   515      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              20:04:06.7 - 20:06:10.0   516      0 0137+331                 25974  [0,1]  [3.33, 3.33] 
              20:06:16.7 - 20:07:40.0   517      0 0137+331                 17550  [2,3]  [3.33, 3.33] 
              20:07:56.7 - 20:09:00.0   518      0 0137+331                 13338  [4,5]  [3.33, 3.33] 
              20:11:46.7 - 20:13:00.0   519      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              20:13:16.7 - 20:14:20.0   520      0 0137+331                 13338  [8,9]  [3.33, 3.33] 
              20:14:36.7 - 20:15:30.0   521      0 0137+331                 11232  [10,11]  [3.33, 3.33] 
              20:15:46.7 - 20:16:50.0   522      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              20:18:06.7 - 20:19:50.0   523     89 JUPITER_17               21762  [4,5]  [3.33, 3.33] 
              20:19:56.7 - 20:21:20.0   524     90 JUPITER_18               17550  [2,3]  [3.33, 3.33] 
              20:24:16.7 - 20:25:30.0   525     91 JUPITER_19               15444  [6,7]  [3.33, 3.33] 
              20:25:46.7 - 20:27:00.0   526     92 JUPITER_20               15444  [8,9]  [3.33, 3.33] 
              20:27:16.7 - 20:28:10.0   527     93 JUPITER_21               11232  [10,11]  [3.33, 3.33] 
              20:28:26.7 - 20:29:30.0   528     94 JUPITER_22               13338  [12,13]  [3.33, 3.33] 
              20:33:46.7 - 20:35:40.0   529      1 0813+482                 23868  [4,5]  [3.33, 3.33] 
              20:35:46.7 - 20:37:10.0   530      1 0813+482                 17550  [2,3]  [3.33, 3.33] 
              20:37:16.7 - 20:38:30.0   531      1 0813+482                 15444  [0,1]  [3.33, 3.33] 
              20:38:46.7 - 20:39:40.0   532      1 0813+482                 11232  [6,7]  [3.33, 3.33] 
              20:40:56.7 - 20:42:40.0   533      2 0542+498                 21762  [4,5]  [3.33, 3.33] 
              20:42:46.7 - 20:44:10.0   534      2 0542+498                 17550  [0,1]  [3.33, 3.33] 
              20:44:16.7 - 20:45:30.0   535      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              20:48:16.7 - 20:49:30.0   536      2 0542+498                 15444  [6,7]  [3.33, 3.33] 
              20:49:46.7 - 20:50:50.0   537      2 0542+498                 13338  [8,9]  [3.33, 3.33] 
              20:51:06.7 - 20:52:00.0   538      2 0542+498                 11232  [10,11]  [3.33, 3.33] 
              20:52:16.7 - 20:53:20.0   539      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              20:59:16.7 - 21:02:20.0   540      3 0521+166                 38610  [4,5]  [3.33, 3.33] 
              21:02:26.7 - 21:03:50.0   541      3 0521+166                 17550  [0,1]  [3.33, 3.33] 
              21:03:56.7 - 21:05:00.0   542      3 0521+166                 13338  [2,3]  [3.33, 3.33] 
              21:07:56.7 - 21:09:10.0   543      3 0521+166                 15444  [6,7]  [3.33, 3.33] 
              21:09:26.7 - 21:10:20.0   544      3 0521+166                 11232  [8,9]  [3.33, 3.33] 
              21:10:36.7 - 21:11:40.0   545      3 0521+166                 13338  [10,11]  [3.33, 3.33] 
              21:11:56.7 - 21:13:00.0   546      3 0521+166                 13338  [12,13]  [3.33, 3.33] 
              21:13:46.7 - 21:15:30.0   547      4 0437+296                 21762  [4,5]  [3.33, 3.33] 
              21:15:36.7 - 21:16:50.0   548      4 0437+296                 15444  [0,1]  [3.33, 3.33] 
              21:16:56.7 - 21:18:10.0   549      4 0437+296                 15444  [2,3]  [3.33, 3.33] 
              21:18:26.7 - 21:19:30.0   550      4 0437+296                 13338  [6,7]  [3.33, 3.33] 
              21:20:36.7 - 21:22:30.0   551     95 VENUS_15                 23868  [4,5]  [3.33, 3.33] 
              21:22:36.7 - 21:24:00.0   552     96 VENUS_16                 17550  [2,3]  [3.33, 3.33] 
              21:27:16.7 - 21:28:40.0   553     97 VENUS_17                 17550  [6,7]  [3.33, 3.33] 
              21:28:56.7 - 21:30:00.0   554     98 VENUS_18                 13338  [8,9]  [3.33, 3.33] 
              21:30:16.7 - 21:31:20.0   555     99 VENUS_19                 13338  [10,11]  [3.33, 3.33] 
              21:31:36.7 - 21:32:40.0   556    100 VENUS_20                 13338  [12,13]  [3.33, 3.33] 
              21:39:16.7 - 21:40:30.0   557      6 0319+415                 15444  [8,9]  [3.33, 3.33] 
              21:40:46.7 - 21:41:40.0   558      6 0319+415                 11232  [10,11]  [3.33, 3.33] 
              21:41:56.7 - 21:43:00.0   559      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              21:43:56.7 - 21:45:40.0   560      0 0137+331                 21762  [0,1]  [3.33, 3.33] 
              21:45:46.7 - 21:47:00.0   561      0 0137+331                 15444  [2,3]  [3.33, 3.33] 
              21:47:16.7 - 21:48:20.0   562      0 0137+331                 13338  [4,5]  [3.33, 3.33] 
              21:51:16.7 - 21:52:30.0   563      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              21:52:46.7 - 21:53:40.0   564      0 0137+331                 11232  [8,9]  [3.33, 3.33] 
              21:53:56.7 - 21:55:00.0   565      0 0137+331                 13338  [10,11]  [3.33, 3.33] 
              21:55:16.7 - 21:56:20.0   566      0 0137+331                 13338  [12,13]  [3.33, 3.33] 
              21:57:26.7 - 21:59:10.0   567    101 JUPITER_23               21762  [4,5]  [3.33, 3.33] 
              21:59:16.7 - 22:00:30.0   568    102 JUPITER_24               15444  [2,3]  [3.33, 3.33] 
              22:03:36.7 - 22:04:50.0   569    103 JUPITER_25               15444  [6,7]  [3.33, 3.33] 
              22:05:06.7 - 22:06:10.0   570    104 JUPITER_26               13338  [8,9]  [3.33, 3.33] 
              22:06:26.7 - 22:07:30.0   571    105 JUPITER_27               13338  [10,11]  [3.33, 3.33] 
              22:07:46.7 - 22:08:50.0   572    106 JUPITER_28               13338  [12,13]  [3.33, 3.33] 
              22:12:06.7 - 22:14:00.0   573      2 0542+498                 23868  [4,5]  [3.33, 3.33] 
              22:14:06.7 - 22:15:30.0   574      2 0542+498                 17550  [0,1]  [3.33, 3.33] 
              22:15:36.7 - 22:16:50.0   575      2 0542+498                 15444  [2,3]  [3.33, 3.33] 
              22:19:36.7 - 22:20:50.0   576      2 0542+498                 15444  [6,7]  [3.33, 3.33] 
              22:21:06.7 - 22:22:10.0   577      2 0542+498                 13338  [8,9]  [3.33, 3.33] 
              22:22:26.7 - 22:23:20.0   578      2 0542+498                 11232  [10,11]  [3.33, 3.33] 
              22:23:36.7 - 22:24:40.0   579      2 0542+498                 13338  [12,13]  [3.33, 3.33] 
              22:27:56.7 - 22:30:20.0   580    107 VENUS_21                 30186  [4,5]  [3.33, 3.33] 
              22:30:26.7 - 22:31:40.0   581    108 VENUS_22                 15444  [2,3]  [3.33, 3.33] 
              22:34:56.7 - 22:36:20.0   582    109 VENUS_23                 17550  [6,7]  [3.33, 3.33] 
              22:36:36.7 - 22:37:40.0   583    110 VENUS_24                 13338  [8,9]  [3.33, 3.33] 
              22:37:56.7 - 22:39:00.0   584    111 VENUS_25                 13338  [10,11]  [3.33, 3.33] 
              22:39:16.7 - 22:40:20.0   585    112 VENUS_26                 13338  [12,13]  [3.33, 3.33] 
              22:45:06.7 - 22:46:20.0   586      6 0319+415                 15444  [8,9]  [3.33, 3.33] 
              22:46:36.7 - 22:47:30.0   587      6 0319+415                 11232  [10,11]  [3.33, 3.33] 
              22:47:46.7 - 22:48:50.0   588      6 0319+415                 13338  [12,13]  [3.33, 3.33] 
              22:49:56.7 - 22:51:40.0   589      0 0137+331                 21762  [0,1]  [3.33, 3.33] 
              22:51:46.7 - 22:53:10.0   590      0 0137+331                 17550  [2,3]  [3.33, 3.33] 
              22:53:26.7 - 22:54:20.0   591      0 0137+331                 11232  [4,5]  [3.33, 3.33] 
              22:57:16.7 - 22:58:30.0   592      0 0137+331                 15444  [6,7]  [3.33, 3.33] 
              22:58:46.7 - 22:59:50.0   593      0 0137+331                 13338  [8,9]  [3.33, 3.33] 
              23:00:06.7 - 23:01:00.0   594      0 0137+331                 11232  [10,11]  [3.33, 3.33] 
              23:01:16.7 - 23:02:56.7   595      0 0137+331                 21060  [12,13]  [3.33, 3.33] 
           (nRows = Total number of rows per scan) 
Fields: 113
  ID   Code Name                RA               Decl           Epoch   SrcId      nRows
  0    A    0137+331            01:37:41.299500 +33.09.35.13400 J2000   0         918216
  1    T    0813+482            08:13:36.051800 +48.13.02.26200 J2000   1         637416
  2    A    0542+498            05:42:36.137900 +49.51.07.23400 J2000   2        1042470
  3    A    0521+166            05:21:09.886000 +16.38.22.05200 J2000   3         520182
  4    T    0437+296            04:37:04.174700 +29.40.15.13600 J2000   4         388908
  5         VENUS_0             04:06:58.580643 +22.30.53.40255 J2000   5          92664
  6    A    0319+415            03:19:48.160100 +41.30.42.10600 J2000   6         320112
  7         VENUS_1             04:06:58.579281 +22.30.53.47812 J2000   7          68094
  8         VENUS_2             04:06:58.579297 +22.30.53.48987 J2000   8          26676
  9    T    1411+522            14:11:20.647700 +52.12.09.14100 J2000   9        1286766
  10   A    1331+305            13:31:08.288100 +30.30.32.96000 J2000   10       1226394
  11        MARS_0              14:21:43.127848 -12.22.02.36467 J2000   11         23868
  12        MARS_1              14:21:43.128869 -12.22.02.35454 J2000   12         14742
  13        MARS_2              14:21:43.129973 -12.22.02.36659 J2000   13         30888
  14        MARS_3              14:21:43.130712 -12.22.02.37360 J2000   14         26676
  15        MARS_4              14:21:43.150566 -12.22.02.42711 J2000   15         25974
  16        MARS_5              14:21:43.151195 -12.22.02.44041 J2000   16         17550
  17        MARS_6              14:21:43.151906 -12.22.02.45426 J2000   17         32994
  18        MARS_7              14:21:43.152331 -12.22.02.46476 J2000   18         24570
  19        MARS_8              14:21:43.168028 -12.22.02.52706 J2000   19         25974
  20        MARS_9              14:21:43.167491 -12.22.02.50212 J2000   20         15444
  21        MARS_10             14:21:43.169161 -12.22.02.51902 J2000   21         17550
  22        MARS_11             14:21:43.169715 -12.22.02.52549 J2000   22         26676
  23        MARS_12             14:21:43.170821 -12.22.02.53568 J2000   23         13338
  24        MARS_13             14:21:43.186464 -12.22.02.60257 J2000   24         39312
  25        MARS_14             14:21:43.187824 -12.22.02.61708 J2000   25         32994
  26        MARS_15             14:21:43.188446 -12.22.02.62308 J2000   26         24570
  27        MARS_16             14:21:43.206030 -12.22.02.71568 J2000   27         37206
  28        MARS_17             14:21:43.207567 -12.22.02.71610 J2000   28         44226
  29        MARS_18             14:21:43.208558 -12.22.02.71616 J2000   29         13338
  30        NGC7027             21:07:01.593000 +42.14.10.18600 J2000   30        755352
  31        MARS_19             14:21:43.252205 -12.22.02.88853 J2000   31         23868
  32        MARS_20             14:21:43.255402 -12.22.02.89884 J2000   32         17550
  33        MARS_21             14:21:43.256647 -12.22.02.91136 J2000   33         32994
  34        MARS_22             14:21:43.257417 -12.22.02.91984 J2000   34         24570
  35        NEPTUNE_0           20:26:04.762230 -18.54.47.11200 J2000   35        121446
  36        NEPTUNE_1           20:26:04.759831 -18.54.47.13505 J2000   36         24570
  37        URANUS_0            21:15:46.633339 -16.34.53.33514 J2000   37         28080
  38        URANUS_1            21:15:46.635890 -16.34.53.33561 J2000   38         15444
  39        URANUS_2            21:15:46.640751 -16.34.53.35770 J2000   39         28782
  40        URANUS_3            21:15:46.639738 -16.34.53.34942 J2000   40         11232
  41        NEPTUNE_2           20:26:04.765657 -18.54.47.12015 J2000   41         79326
  42        URANUS_4            21:15:46.637757 -16.34.53.34155 J2000   42         96876
  43        URANUS_5            21:15:46.634967 -16.34.53.36908 J2000   43         26676
  44        NEPTUNE_3           20:26:04.770034 -18.54.47.14130 J2000   44         21762
  45        NEPTUNE_4           20:26:04.769918 -18.54.47.12452 J2000   45         61776
  46        NEPTUNE_5           20:26:04.769855 -18.54.47.10965 J2000   46         13338
  47        JUPITER_0           00:55:38.240057 +04.46.12.71526 J2000   47         35100
  48        JUPITER_1           00:55:38.240062 +04.46.12.77073 J2000   48         17550
  49        JUPITER_2           00:55:38.240100 +04.46.12.75382 J2000   49         35100
  50        JUPITER_3           00:55:38.240077 +04.46.12.74246 J2000   50         26676
  51        URANUS_6            21:15:46.638538 -16.34.53.32971 J2000   51         21762
  52        URANUS_7            21:15:46.640460 -16.34.53.29144 J2000   52         28782
  53        URANUS_8            21:15:46.641481 -16.34.53.29116 J2000   53         26676
  54        NEPTUNE_6           20:26:04.769633 -18.54.47.07815 J2000   54         21762
  55        NEPTUNE_7           20:26:04.771324 -18.54.47.09667 J2000   55         28782
  56        NEPTUNE_8           20:26:04.777552 -18.54.47.15997 J2000   56         26676
  57        JUPITER_4           00:55:38.239788 +04.46.12.72534 J2000   57         21762
  58        JUPITER_5           00:55:38.239726 +04.46.12.67168 J2000   58         30888
  59        JUPITER_6           00:55:38.239721 +04.46.12.68426 J2000   59         26676
  60        URANUS_9            21:15:46.647302 -16.34.53.30184 J2000   60         68094
  61        URANUS_10           21:15:46.647030 -16.34.53.23289 J2000   61         28782
  62        URANUS_11           21:15:46.647005 -16.34.53.24476 J2000   62         53352
  63        NEPTUNE_9           20:26:04.773871 -18.54.47.08056 J2000   63         55458
  64        JUPITER_7           00:55:38.248008 +04.46.12.72473 J2000   64         21762
  65        JUPITER_8           00:55:38.246968 +04.46.12.73406 J2000   65         15444
  66        JUPITER_9           00:55:38.245023 +04.46.12.75424 J2000   66         17550
  67        JUPITER_10          00:55:38.244298 +04.46.12.76092 J2000   67         13338
  68        JUPITER_11          00:55:38.243635 +04.46.12.76709 J2000   68         13338
  69        JUPITER_12          00:55:38.243007 +04.46.12.77351 J2000   69         13338
  70        URANUS_12           21:15:46.643067 -16.34.53.20899 J2000   70         21762
  71        URANUS_13           21:15:46.645463 -16.34.53.23361 J2000   71         15444
  72        URANUS_14           21:15:46.646116 -16.34.53.24052 J2000   72         13338
  73        VENUS_3             04:06:58.400651 +22.31.03.31191 J2000   73         28080
  74        VENUS_4             04:06:58.401794 +22.31.03.34248 J2000   74         17550
  75        VENUS_5             04:06:58.399898 +22.31.03.44432 J2000   75         15444
  76        VENUS_6             04:06:58.399033 +22.31.03.47958 J2000   76         13338
  77        VENUS_7             04:06:58.398397 +22.31.03.51232 J2000   77         13338
  78        VENUS_8             04:06:58.397828 +22.31.03.54457 J2000   78         13338
  79        JUPITER_13          00:55:38.238061 +04.46.12.81335 J2000   79         21762
  80        JUPITER_14          00:55:38.239268 +04.46.12.81351 J2000   80         15444
  81        JUPITER_15          00:55:38.241375 +04.46.12.81296 J2000   81         17550
  82        JUPITER_16          00:55:38.245505 +04.46.12.81366 J2000   82         40014
  83        VENUS_9             04:06:58.355530 +22.31.05.43038 J2000   83         21762
  84        VENUS_10            04:06:58.355626 +22.31.05.45777 J2000   84         15444
  85        VENUS_11            04:06:58.355570 +22.31.05.52774 J2000   85         17550
  86        VENUS_12            04:06:58.355567 +22.31.05.55330 J2000   86         13338
  87        VENUS_13            04:06:58.355684 +22.31.05.57527 J2000   87         13338
  88        VENUS_14            04:06:58.355729 +22.31.05.59668 J2000   88         13338
  89        JUPITER_17          00:55:38.246656 +04.46.12.87401 J2000   89         21762
  90        JUPITER_18          00:55:38.247752 +04.46.12.86218 J2000   90         17550
  91        JUPITER_19          00:55:38.255755 +04.46.12.77857 J2000   91         15444
  92        JUPITER_20          00:55:38.255073 +04.46.12.78694 J2000   92         15444
  93        JUPITER_21          00:55:38.254329 +04.46.12.79360 J2000   93         11232
  94        JUPITER_22          00:55:38.253550 +04.46.12.80146 J2000   94         13338
  95        VENUS_15            04:06:58.328339 +22.31.07.50756 J2000   95         23868
  96        VENUS_16            04:06:58.327042 +22.31.07.65087 J2000   96         17550
  97        VENUS_17            04:06:58.324579 +22.31.07.72818 J2000   97         17550
  98        VENUS_18            04:06:58.323670 +22.31.07.75559 J2000   98         13338
  99        VENUS_19            04:06:58.322865 +22.31.07.77978 J2000   99         13338
  100       VENUS_20            04:06:58.322088 +22.31.07.80324 J2000   100        13338
  101       JUPITER_23          00:54:44.945234 +04.40.40.74883 J2000   101        21762
  102       JUPITER_24          00:54:44.946444 +04.40.40.74881 J2000   102        15444
  103       JUPITER_25          00:54:44.948861 +04.40.40.74834 J2000   103        15444
  104       JUPITER_26          00:54:44.949665 +04.40.40.74806 J2000   104        13338
  105       JUPITER_27          00:54:44.950518 +04.40.40.74791 J2000   105        13338
  106       JUPITER_28          00:54:44.959405 +04.40.40.74741 J2000   106        13338
  107       VENUS_21            04:02:03.007748 +22.14.42.13749 J2000   107        30186
  108       VENUS_22            04:02:03.005815 +22.14.42.22171 J2000   108        15444
  109       VENUS_23            04:02:03.002851 +22.14.42.32830 J2000   109        17550
  110       VENUS_24            04:02:03.002023 +22.14.42.36587 J2000   110        13338
  111       VENUS_25            04:02:03.001008 +22.14.42.39838 J2000   111        13338
  112       VENUS_26            04:02:03.000143 +22.14.42.43208 J2000   112        13338
Spectral Windows:  (14 unique spectral windows and 1 unique polarization setups)
  SpwID  Name                                  #Chans   Frame   Ch0(MHz)  ChanWid(kHz)  TotBW(kHz) CtrFreq(MHz)  Corrs          
  0      1*3.12 MHz channels @ 322 MHz (TOPO)       1   TOPO     321.562      3125.000      3125.0    321.5625   RR  RL  LR  LL
  1      1*3.12 MHz channels @ 328 MHz (TOPO)       1   TOPO     327.500      3125.000      3125.0    327.5000   RR  RL  LR  LL
  2      1*12.5 MHz channels @ 1.27 GHz (TOPO)      1   TOPO    1275.000     12500.000     12500.0   1275.0000   RR  RL  LR  LL
  3      1*12.5 MHz channels @ 1.47 GHz (TOPO)      1   TOPO    1465.000     12500.000     12500.0   1465.0000   RR  RL  LR  LL
  4      1*50 MHz channels @ 4.89 GHz (TOPO)        1   TOPO    4885.100     50000.000     50000.0   4885.1000   RR  RL  LR  LL
  5      1*50 MHz channels @ 4.84 GHz (TOPO)        1   TOPO    4835.100     50000.000     50000.0   4835.1000   RR  RL  LR  LL
  6      1*50 MHz channels @ 8.44 GHz (TOPO)        1   TOPO    8435.100     50000.000     50000.0   8435.1000   RR  RL  LR  LL
  7      1*50 MHz channels @ 8.49 GHz (TOPO)        1   TOPO    8485.100     50000.000     50000.0   8485.1000   RR  RL  LR  LL
  8      1*50 MHz channels @ 15 GHz (TOPO)          1   TOPO   14964.900     50000.000     50000.0  14964.9000   RR  RL  LR  LL
  9      1*50 MHz channels @ 14.9 GHz (TOPO)        1   TOPO   14914.900     50000.000     50000.0  14914.9000   RR  RL  LR  LL
  10     1*50 MHz channels @ 22.5 GHz (TOPO)        1   TOPO   22485.100     50000.000     50000.0  22485.1000   RR  RL  LR  LL
  11     1*50 MHz channels @ 22.4 GHz (TOPO)        1   TOPO   22435.100     50000.000     50000.0  22435.1000   RR  RL  LR  LL
  12     1*50 MHz channels @ 43.3 GHz (TOPO)        1   TOPO   43314.900     50000.000     50000.0  43314.9000   RR  RL  LR  LL
  13     1*50 MHz channels @ 43.4 GHz (TOPO)        1   TOPO   43364.900     50000.000     50000.0  43364.9000   RR  RL  LR  LL
Sources: 113       
...

##### End Task: listobs              #####
##########################################

Next, we will use split to split out the following into a new MS.

  • 0137+331 (polarization leakage calibrator)
  • 1331+305 (3C286 flux density scale and polarization angle calibrator)
  • JUPITER* (the asterisk indicates a wildcard and will include all Jupiter fields)
  • C-band (6cm): spw='4,5'
split(vis='FLUX99.ms', outputvis='jupiter6cm.demo.ms', field='1331+305,0137+331,JUPITER*', spw='4,5')

At this point, you may wish to run listobs on this new MS. Note, with the new MS the spws will be renumbered starting at 0.

Next use plotants to check the array configuration and select a reference antenna. Here, we will use antenna '11' as a reference since it is located in the middle of the array.

plotants(vis='jupiter6cm.demo.ms', figfile='jupiter6cm.demo.ant.png')

Note (for uvfits sourced directly from archive only): CASA 5.4 and earlier versions will not plot the antennas properly. This is to be resolved in future CASA versions. If this occurs then a reference antenna can be selected using the listobs task and choosing an antenna located on a pad close to the center of the array (Pads numbers increase with distance from the center of the array, ie. "VLA:_N1" and "EVLA:W2" are pads close to the center of the array, where as, "VLA:_N18" is not).

Data Inspection and Flagging

In this section we present two methods of flagging the data:

  • Interactive flagging using plotms, which is destructive to the data set and cannot be undone. If a mistake is made, you must start over with a new copy of the data set. Because of the destructive nature of this method, it is generally not recommended.
  • Non-interactive flagging using flagdata, which is not destructive to the data set and can be undone (be sure to set flagbackup=True). If a mistake is made, you may undo the flagged data. This is the recommended approach to flagging any data set, new (JVLA) or old (VLA).


For both methods (interactive and non-interactive flagging), we will use plotms to inspect the data.

plotms(vis='jupiter6cm.demo.ms', selectdata=True, field='1331+305', correlation='RR,LL', xaxis='uvdist', yaxis='amp')

Inspect the following in the data set:

  • The primary flux density scale and polarization angle calibrator, 1331+305 (3C286).
  • RR,LL and RL,LR correlations separately due to large amplitude differences between them (when all correlations are plotted together, the RL,LR will seem like bad data due to their much lower amplitudes as compared to RR,LL).
  • The other two sources we are interested in, the polarization leakage calibrator (0137+331) and the target source (JUPITER).


Interactive Flagging

  • Use Mark Regions within the plotms GUI to draw boxes around points to flag, and hit Flag to flag.


Non-Interactive Flagging

  • Use plotms to inspect the data set and flagdata to flag the data. While inspecting the data, you may notice that Antenna 9 (ID=8) in spw='1' is often bad. The bad data on Antenna 9 are in the last 4 scans in spw='1' for the 0137+331 calibrator and spw='1' for the target source (JUPITER), as well as in the last scan for all antennas in both spws on the target source. We can flag these points with the following flagdata task executions.
flagdata(vis='jupiter6cm.demo.ms', mode='manual', field='0137+331', spw='1', antenna='9', timerange='42:00:00~48:00:00', flagbackup=True)

flagdata(vis='jupiter6cm.demo.ms', mode='manual', field='JUPITER*', spw='1', antenna='9', timerange='16:26:00~22:20:00', flagbackup=True)

flagdata(vis='jupiter6cm.demo.ms', mode='manual', field='JUPITER*', spw='0,1', timerange='21:40:00~22:20:00', flagbackup=True)
  • There are more data points to flag -- keep flagging until you are happy with the results. The following commands will get rid of most bad data. However, depending on how clean the data you want to proceed with, you may still want to inspect them in plotms and flag interactively the remainder of bad data points.
flagdata(vis='jupiter6cm.demo.ms',mode='clip',field='1331+305',correlation='ABS_RR,LL',clipoutside=False,clipminmax=[0,0.75], flagbackup=True)

flagdata(vis='jupiter6cm.demo.ms',mode='clip',field='1331+305',correlation='ABS_RL,LR',clipoutside=False,clipminmax=[0,0.04], flagbackup=True)

flagdata(vis='jupiter6cm.demo.ms',mode='clip',field='0137+331',correlation='ABS_RR,LL',clipoutside=False,clipminmax=[0,0.55], flagbackup=True)

flagdata(vis='jupiter6cm.demo.ms',mode='clip',field='0137+331',correlation='ABS_RL,LR',clipoutside=False,clipminmax=[0,0.01], flagbackup=True)

If you are unfamiliar with flagging in CASA, consult the detailed topical guide Flagging VLA Data.

Calibration

Flux Density Scale

Next we will use setjy to set the absolute flux density scale, only for Stokes I at the moment (the total flux density model).

  • Our primary flux calibrator here is 1331+305 (3C286).
  • The default model for CASA 5.5+ is 'Perley-Butler 2017'.
setjy(vis='jupiter6cm.demo.ms', field='1331+305', model='3C286_C.im', usescratch=True)

Initial Gain Calibration

Figure 1: Screen shot of plotms Amplitude vs. Time (vis='jupiter6cm.demo.G').
Figure 2: Screen shot of plotms Phase vs. Time (vis='jupiter6cm.demo.G').

At this stage the data have an overall flux density scaling determined, but full gain solutions aren't there yet. The relevant task is gaincal (analogous to the AIPS task CALIB). Gaincal will produce a separate table with solutions, and we will use appropriate extensions to keep track of the different tables and their corresponding solutions (e.g., gain curve table = .gc).

NOTE: Since we have only two single-channel continuum spw, we do not want to do bandpass calibration nor solve for delays within spws as is currently done with wide bandwidth JVLA data.

First, generate an antenna zenith-angle dependent VLA gain curve calibration table.

gencal(vis='jupiter6cm.demo.ms', caltable='jupiter6cm.demo.gc', caltype='gc')

Now, solve for antenna gains on 1331+305 and 0137+331, using the generated gain curve table (.gc).

gaincal(vis='jupiter6cm.demo.ms', caltable='jupiter6cm.demo.G', field='1331+305,0137+331', spw='', gaintype='G', calmode='ap', solint='inf', combine='', refant='11', minsnr=3, gaintable=['jupiter6cm.demo.gc'], parang=False)

# And check the solutions
# Figure 1:
plotms(vis='jupiter6cm.demo.G', xaxis='time', yaxis='amp', gridrows=3, gridcols=3, iteraxis='antenna')

# Figure 2:
plotms(vis='jupiter6cm.demo.G', xaxis='time', yaxis='phase', plotrange=[-1,-1,-200,200], gridrows=3, gridcols=3, iteraxis='antenna')

If all looks good, bootstrap the flux density scale of the flux calibrator onto the phase calibrators (CASA's fluxscale task is equivalent to GETJY in AIPS). When executing fluxscale, the calibration table with the extension .G is modified and stored as a new table with the extension .Gflx.

myFluxscale = fluxscale(vis='jupiter6cm.demo.ms', caltable='jupiter6cm.demo.G', fluxtable='jupiter6cm.demo.Gflx', reference='1331+305', transfer='0137+331', incremental=True, append=False, display=False)

The output is displayed in the logger as well as stored in the myFluxscale python dictionary.

Beginning fluxscale--(MSSelection version)-------
Generating an incremental caltable
Found reference field(s): 1331+305
Found transfer field(s):  0137+331
Flux density for 0137+331 in SpW=0 (freq=4.8851e+09 Hz) is: 5.29771 +/- 0.00449469 (SNR = 1178.66, N = 54)
Flux density for 0137+331 in SpW=1 (freq=4.8351e+09 Hz) is: 5.34972 +/- 0.00176213 (SNR = 3035.93, N = 54)
Fitted spectrum for 0137+331 with fitorder=1: Flux density = 5.32365 +/- 0 (freq=4.86004 GHz) spidx: a_1 (spectral index) =-0.949536 +/- 0 covariance matrix for the fit:  covar(0,0)=2.07079e-07 covar(0,1)=6.84111e-05 covar(1,0)=6.84111e-05 covar(1,1)=0.0414925
Creating G Jones table from specified parameters.
Generating 'G Cal' corrections.
. . .

Storing result in jupiter6cm.demo.Gflx
Writing solutions to table: jupiter6cm.demo.Gflx


Before proceeding, inspect the flux density calibration and save results to a file.

plotms(vis='jupiter6cm.demo.Gflx', xaxis='time', yaxis='amp', showgui=True, plotfile='jupiter6cm.demo.Gflx.amp.png')

plotms(vis='jupiter6cm.demo.Gflx', xaxis='time', yaxis='phase', plotrange=[-1,-1,-200,200], showgui=True, plotfile='jupiter6cm.demo.Gflx.phase.png')
  • The plot file jupiter6cm.demo.Gflx.amp.png will show two data points: the value at 1.0 is from 3C286 and the value at 0.42 is the complex gain calibrator. The reason 3C286 is 1.0 is because it is used as the reference and the complex gain calibrator is the flux ratio referenced to 3C286, which is assumed 1.0. In this observation, 3C286 was used as the flux density reference.
  • The plot file jupiter6cm.demo.Gflx.phase.png will show two data points at zero (plotted on top of each other). Since we are just scaling amplitudes, we are not expecting the phases to be modified by this calibration table, thus the phases are zero.

Polarization Calibration

Just as in the step of the initial gain calibration, since our old VLA data have single-channel continuum spws, we do not want to solve for KCROSS delays in our polarization calibration. Instead, we directly solve for D and X terms.

Set the Polarization Model

First, set the polarization model for the polarized position-angle calibrator (here 1331+305=3C286 which is also our primary flux calibrator). For polarization properties of your primary polarization calibrator see the Polarimetry section of the VLA Observing Guide.

from math import log
i0=7.3109                                # Stokes I value for spw 0 ch 0
f0=4.8851                                # Frequency for spw0 ch0 (note that in our data the 'lower' spw is actually higher frequency)
alpha=log(i0/7.35974932)/log(4.8351/f0)  # Values from our setjy() run on Stokes I earlier
c0=0.114                                 # Fractional polarisation 11.4% for 5GHz
import numpy as np
d0=33*np.pi/180                          # Polarization angle 33deg in radians

myPolSetjy = setjy(vis='jupiter6cm.demo.ms', field='1331+305', standard='manual', spw='', fluxdensity=[i0,0,0,0], spix=[alpha,0], reffreq=str(f0)+'GHz', polindex=[c0,0], polangle=[d0,0], scalebychan=True, usescratch=True)

The results are displayed in the CASA logger as well as saved in the myPolSetjy python dictionary

#In CASA
myPolSetjy

#the output below
{'1': {'0': {'fluxd': array([7.3109    , 0.33899165, 0.7613877 , 0.        ])},
  '1': {'fluxd': array([7.26237491, 0.33674164, 0.7563341 , 0.        ])},
  'fieldName': '1331+305'},
 'format': "{field Id: {spw Id: {fluxd: [I,Q,U,V] in Jy}, 'fieldName':field name }}"}

Solve for the Leakage Terms (D terms)

Figure 3: Screen shot of plotms Gain Amp vs. Antenna1 (vis='jupiter6cm.demo.D').
Figure 4: Screen shot of plotms Gain Phase vs. Antenna1 (vis='jupiter6cm.demo.D').
Figure 5: Screen shot of plotms SNR vs. Antenna1 (vis='jupiter6cm.demo.D').

In this step we solve for the instrumental polarization. Solving for polarization leakage on 0137+331, we will assume our calibrator has unknown polarization (poltype='D+QU' if good parallactic coverage, otherwise poltype='D', consult polcal for more information on options).

polcal(vis='jupiter6cm.demo.ms', caltable='jupiter6cm.demo.D', field='0137+331', spw='', refant='11', poltype='D+QU', solint='inf', combine='scan',minsnr=3, gaintable=['jupiter6cm.demo.gc', 'jupiter6cm.demo.G'], gainfield=['','0137+331',''])

Check the solutions

# Figure 3:
plotms(vis='jupiter6cm.demo.D', xaxis='antenna1', yaxis='amp', showgui=True, plotfile='jupiter6cm.demo.D.amp.png')

# Figure 4:
plotms(vis='jupiter6cm.demo.D', xaxis='antenna1', yaxis='phase', plotrange=[-1,-1,-200,200], showgui=True, plotfile='jupiter6cm.demo.D.phase.png')

# Figure 5:
plotms(vis='jupiter6cm.demo.D', xaxis='antenna1', yaxis='snr', showgui=True, plotfile='jupiter6cm.demo.D.snr.png')

Solve for the R-L Polarization angle (X term)

The total polarization is now correct (since we just calibrated the instrumental polarization, i.e., D terms). Now the R-L phase needs to be calibrated to obtain an accurate polarization position angle.

polcal(vis='jupiter6cm.demo.ms', caltable='jupiter6cm.demo.X', field='1331+305', spw='', refant='11', poltype='Xf', solint='inf', combine='scan',minsnr=3, gaintable=['jupiter6cm.demo.gc', 'jupiter6cm.demo.G', 'jupiter6cm.demo.D'], gainfield=['','1331+305','',''])

Check the solutions in the CASA logger window

The following calibration term is arranged for solve:
.   Xf Jones: table=jupiter6cm.demo.X append=false solint=inf,none refantmode='flex' refant='none' minsnr=3 apmode=AP solnorm=false
For solint = inf, found 2 solution intervals.
Mean CROSS-HAND PHASE solution for 1331+305 (spw = 0) = 28.7301 deg.
Mean CROSS-HAND PHASE solution for 1331+305 (spw = 1) = -59.9972 deg.
  Found good Xf Jones solutions in 2 solution intervals.


NOTE: If you are using CASA 4.7 or earlier, you may want to use poltype='X' in X-term calculations (Mueller matrices). For CASA 5.0 and later this option will not work (the relevant CASA documentation is being updated), and hence you need to use poltype='Xf' (Jones matrices). Although 'Xf' should be used predominantly for large bandwidths, which clearly is not the case here, it can also be used for the single channel old VLA data as long as you make sure the interp parameter is set to default (which should be nearest).

Apply the Calibration

Now that we have derived all the calibration solutions and saved them in the tables of multiple extensions, we need to apply them to the actual data. The applycal task commands will apply the solution tables to the DATA and write a new column CORRECTED_DATA as it is standard for CASA. Important: make sure you set parang=True.

applycal(vis='jupiter6cm.demo.ms', field='1331+305', spw='', selectdata=False, gaintable=['jupiter6cm.demo.gc', 'jupiter6cm.demo.G', 'jupiter6cm.demo.D','jupiter6cm.demo.X'], gainfield=['','1331+305'], calwt=[False], parang=True)

applycal(vis='jupiter6cm.demo.ms', field='0137+331', spw='', selectdata=False, gaintable=['jupiter6cm.demo.gc', 'jupiter6cm.demo.G', 'jupiter6cm.demo.Gflx','jupiter6cm.demo.D','jupiter6cm.demo.X'], gainfield=['','0137+331','0137+331'], calwt=[False], parang=True)

applycal(vis='jupiter6cm.demo.ms', field='JUPITER*', spw='', selectdata=False, gaintable=['jupiter6cm.demo.gc', 'jupiter6cm.demo.G', 'jupiter6cm.demo.Gflx','jupiter6cm.demo.D','jupiter6cm.demo.X'], gainfield=['','0137+331','0137+331'], calwt=[False], parang=True)


Next, we will split the corrected (i.e., calibrated) Jupiter target data from the MS we started with and write it to a new single-source MS.

split(vis='jupiter6cm.demo.ms', outputvis='jupiter6cm.demo.JUPITER.split.ms', field='JUPITER*', datacolumn='corrected')

You can use the plotms task to look at the split calibrated data.

Initial Imaging (Stokes I)

Figure 6: Annotated screen shot of jupiter6cm.demo.JUPITER.I.clean1 in CARTA.

Next we will image and clean the Jupiter data. In this step we will self-calibrate, therefore in the initial imaging we will not clean too deeply and we will save the model in the MS data (with the use of parameter savemodel in tclean).


Since we set mask="" in tclean, the interactive GUI will not allow you to do the deconvolution before you draw the mask on at least one plane. When drawing a mask, be sure to select All Channels and All Polarizations each time you run tclean.

tclean(vis='jupiter6cm.demo.JUPITER.split.ms', stokes='I', field='', spw='', imagename='jupiter6cm.demo.JUPITER.I.clean1', robust = 0.0, imsize=[288], cell=['3arcsec'], specmode='mfs', deconvolver='hogbom', weighting='briggs', threshold='0.1mJy', mask='', niter=500, interactive=True, cycleniter=100, savemodel='modelcolumn', pblimit=-0.2)

Next we will use CARTA to inspect the quality of the cleaned image and we can use the Statistics Widget to tell us the rms. Once you have loaded CARTA using the instructions from the link, proceed with the following steps:

  1. Load the cleaned image, jupiter6cm.demo.JUPITER.I.clean1.image
  2. If you would like your images to use the same Color map as this guide, select viridis (at the bottom of the list).
  3. Hover your mouse over the image to reveal the zoom icons near the bottom of the image. Zoom in/out as much as you wish.
  4. Near the top, select the Rectangle tool and draw a box in the blank space next to Jupiter.
  5. Near the top, select the Statistics Widget (tiny calculator icon). Here you will see the rms of the sky around Jupiter. These numbers will change as you move the box around the blank sky.

For an annotated visual example, refer to Figure 6.


In this initial imaging, the deconvolution will stop with the iteration limit since we set it fairly low. We 'cleaned' approximately 4.3 Jy in this initial imaging step, and reached rms of about 3.64 mJy/bm.


Self-Calibration

Figure 7: Screen shot of plotms Gain Amp vs. Time per antenna (vis='jupiter6cm.demo.JUPITER.split.selfcal1').
Figure 8: Screen shot of plotms Gain Phase vs. Time per antenna (vis='jupiter6cm.demo.JUPITER.split.selfcal1').
Figure 9: Annotated screen shot of jupiter6cm.demo.JUPITER.I.clean1.image and jupiter6cm.demo.JUPITER.I.clean2.image in CARTA.

In the self-calibration step we run gaincal that will make use of the newly created MODEL column in our MS file.

gaincal(vis='jupiter6cm.demo.JUPITER.split.ms', caltable='jupiter6cm.demo.JUPITER.split.selfcal1', field='', spw='', gaintype='G', calmode='p', solint='30s', combine='', refant='11', parang=False, append=False, selectdata=False)

Inspect the solutions using plotms.

# Figure 7:
plotms(vis='jupiter6cm.demo.JUPITER.split.selfcal1',xaxis='time',yaxis='amp',gridrows=2, gridcols=3, iteraxis='antenna')

# Figure 8:
plotms(vis='jupiter6cm.demo.JUPITER.split.selfcal1',xaxis='time',yaxis='phase', gridrows=2, gridcols=3 ,iteraxis='antenna',plotrange=[-1,-1,-180,180])

Next, use applycal to apply the calibration to the DATA (creating a CORRECTED column in the MS).

applycal(vis='jupiter6cm.demo.JUPITER.split.ms', field='', spw='', selectdata=False, gaintable=['jupiter6cm.demo.JUPITER.split.selfcal1'], gainfield=[''], interp=['nearest'],calwt=[False], applymode='calflag')

Now, use tclean to image the self-calibrated data.

tclean(vis='jupiter6cm.demo.JUPITER.split.ms', stokes='I', field='', spw='', imagename='jupiter6cm.demo.JUPITER.I.clean2', robust= 0.0, imsize=[288], cell=['3arcsec'], specmode='mfs', deconvolver='hogbom', weighting='briggs', threshold='0.05mJy', mask='', niter=10000, interactive=True, cycleniter=100, pblimit=-0.2)

Check the image statistics using CARTA. See Figure 9 for details.

  1. Open both images: jupiter6cm.demo.JUPITER.I.clean1.image and jupiter6cm.demo.JUPITER.I.clean2.image. (Note, only one image can be opened at a time. After you have opened one, you will then need to select File -> Append Image to open another image and so on.)
  2. In the lower right under Image List, select XY and R (under Matching) for both images. This will allow you to manipulate the images simultaneously.
  3. Hover your mouse over one of the images to reveal the zoom icons. These will allow you to zoom in/out of the image.
  4. Near the top, select the Ellipse tool (circle icon) and draw an ellipse around Jupiter for one of the images. Since you selected XY and R for both images, an ellipse drawn on one image will be automatically created on the other image.
  5. Near the top, select the Statistics Widget (tiny calculator). A small window will pop-up with the statistics of the active image (the last selected image). You may change information shown for an image by either selecting the other image or by selecting the image file name in the Image selector menu located on the Statistics Widget window.

After one cycle of self-calibration with tclean we reached an rms of about 1.10 mJy/bm (in the blank sky). However, keep in mind that the rms values may differ for you since they will depend on how deeply you cleaned and how good a mask you applied. Note, after self-cal the flux of the target should be about the same or higher than before self-cal. If the flux is lower, then something went wrong in the gaincal step for self-cal.

Full Stokes Imaging

At this stage we will perform full Stokes imaging using tclean to create an image of each Stokes parameter that we will later use to create polarized intensity and angle images.

tclean(vis='jupiter6cm.demo.JUPITER.split.ms', stokes='IQUV', field='', spw='', imagename='jupiter6cm.demo.JUPITER.IQUV.clean', robust= 0.0, imsize=[288], cell=['3arcsec'], specmode='mfs', deconvolver='clarkstokes', weighting='briggs', threshold='0.05mJy', mask='', niter=10000, interactive=True, cycleniter=100, pblimit=-0.2)

Inspect the quality of the cleaned image. Open jupiter6cm.demo.JUPITER.IQUV.clean.image in CARTA, create a box in a blank part of the sky next to Jupiter, select the Statistics Widget, and select the Stokes parameter in the Polarization drop-down menu located in the statistics pop-up box.

Depending on how deeply you cleaned, you may reach rms values of about:

  • (I) 1.1 mJy/bm
  • (Q) 0.62 mJy/bm
  • (U) 0.90 mJy/bm
  • (V) 0.16 mJy/bm

Polarization Intensity and Position Angle Images

Figure 10: Jupiter (top left), polarization intensity (POLI) (top right), and position angle (POLA) (bottom left) as seen in CARTA v3.0.0.

Next, we will save each Stokes plane as separate images. We can use either the imsubimage or immath tasks to do so.

Run the imsubimage task:

imsubimage(imagename='jupiter6cm.demo.JUPITER.IQUV.clean.image',outfile='JUPITER.I.image',stokes='I')

imsubimage(imagename='jupiter6cm.demo.JUPITER.IQUV.clean.image',outfile='JUPITER.Q.image',stokes='Q')

imsubimage(imagename='jupiter6cm.demo.JUPITER.IQUV.clean.image',outfile='JUPITER.U.image',stokes='U')

Or run the immath task:

immath(imagename='jupiter6cm.demo.JUPITER.IQUV.clean.image', mode='evalexpr', stokes='I', expr='IM0', outfile='JUPITER.I.image')

immath(imagename='jupiter6cm.demo.JUPITER.IQUV.clean.image', mode='evalexpr', stokes='Q', expr='IM0', outfile='JUPITER.Q.image')

immath(imagename='jupiter6cm.demo.JUPITER.IQUV.clean.image', mode='evalexpr', stokes='U', expr='IM0', outfile='JUPITER.U.image')

Finally, we want to create the polarization intensity (POLI) and position angle (POLA) images using immath.

immath(imagename=['JUPITER.Q.image','JUPITER.U.image'], mode='poli', outfile='JUPITER.POLI.image')

We will now use the polithresh parameter when creating the polarization angle image to get rid of the noise. First check the statistic in the POLI image, and then use it as a threshold while creating the POLA image (in the example below equal to 4 sigma).

immath(imagename=['JUPITER.Q.image','JUPITER.U.image'], mode='pola', outfile='JUPITER.POLA.image',polithresh='4.5mJy/beam')

Again, check the statistics of these final images with CARTA. See Figure 10.


That concludes this tutorial.

For the tutorial on how to perform analysis, display, and manipulation of the polarization images, consult the VLA Continuum Tutorial 3C391.


Last checked on CASA Version 6.4.1

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