EVLA Wide-Band Wide-Field Imaging: G55.7 3.4: Difference between revisions

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[[Category:EVLA]][[Category:Imaging]]
#REDIRECT [[EVLA Wide-Band Wide-Field Imaging: G55.7 3.4-CASA4.4]]
 
<!--
== BEFORE YOU START==
Make sure you have done the steps described at [[Initial_instructions_for_2010| the initial instructions for the 2010 Synthesis Workshop Tutorials]].
-->
 
== Overview ==
 
This CASA Guide describes the imaging of the supernova remnant [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=G55.7+3.4&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id G55.7+3.4.].  The data were taken on August 23, 2010, in the first D-configuration for which the new wide-band capabilities of the WIDAR correlator were available.  The 8-hour-long observation includes all available 1 GHz of bandwidth in L-band, from 1-2 GHz in frequency. 
 
The measurement set (MS) which provides a starting point for this Guide has been imported from the SDM file set, time-averaged to 10 seconds, and flagged with the online flags.  All of these options are available from the NRAO data archive, and since this operation can be relatively time-consuming, the imported, time-averaged dataset is being provided.  The original data set can be found [[https://archive.nrao.edu/archive/ArchiveQuery?PASSWD=&QUERYTYPE=ARCHIVE&PROTOCOL=HTML&SORT_PARM=Starttime&SORT_ORDER=Asc&MAX_ROWS=NO+LIMIT&SORT_PARM2=Starttime&SORT_ORDER2=Asc&QUERY_ID=9999&QUERY_MODE=Prepare+Download&LOCKMODE=PROJECT&SITE_CODE=AOC&DBHOST=CHEWBACCA&WRITELOG=0&PROJECT_CODE=&SEGMENT=&OBSERVER=&ARCHIVE_VOLUME=AB1345_sb1800808_1.55431.004049953706&TIMERANGE1=&TIMERANGE2=&SOURCE_ID=&SRC_SEARCH_TYPE=SIMBAD+or+NED+Resolver&CALIB_TYPE=ALL+Srcs&CENTER_RA=&LONG_RANGE=&FRAME=Equatorial&CENTER_DEC=&LAT_RANGE=&EQUINOX=J2000&SRAD=10.0%27&MIN_EXPOSURE=&OBS_BANDS=ALL&TELESCOPE=EVLA&OBS_MODE=ALL&CORR_MODE=ALL&TELESCOPE_CONFIG=ALL&OBS_POLAR=ALL&SUBARRAY=ALL&OBSFREQ1=&DATATYPE=ALL&OBSBW1=&ARCHFORMAT=ALL&SUBMIT=Submit+Query here]]; note that it is 170 GB in raw form.
 
Averaging to 10 seconds and the removal of some scans which are not used in this tutorial reduces the size of the data set to around 14 GB; the addition of columns for model and corrected data (known as "scratch columns") returns it to 43 GB, which is the size of the MS which will be used here.
 
[Instructions on locating data at the workshop... and from outside the workshop.]
 
== Preliminary data evaluation ==
 
Start CASA by typing <tt>casapy-stable</tt> on the command line.  If you have not used CASA before, some helpful tips are available on the [[Getting Started in CASA]] page.
 
As a first step, use {{listobs}} to have a look at the MS:
 
<source lang="python">
# In CASA
listobs('G55.7+3.4_10s.ms')
</source>
 
The logger output will look like this:
 
<pre>
2011-08-26 14:16:10 INFO listobs ================================================================================
2011-08-26 14:16:10 INFO listobs           MeasurementSet Name:  /lustre/mkrauss/data_workshop/G55.7+3.4_10s.ms      MS Version 2
2011-08-26 14:16:10 INFO listobs ================================================================================
2011-08-26 14:16:10 INFO listobs   Observer: Dr. Sanjay Sanjay Bhatnagar    Project: T.B.D. 
2011-08-26 14:16:10 INFO listobs Observation: EVLA
2011-08-26 14:16:10 INFO listobs Data records: 7343848      Total integration time = 26691.5 seconds
2011-08-26 14:16:10 INFO listobs   Observed from  23-Aug-2010/01:00:25.0  to  23-Aug-2010/08:25:16.5 (UTC)
2011-08-26 14:16:25 INFO listobs  
2011-08-26 14:16:25 INFO listobs   ObservationID = 0        ArrayID = 0
2011-08-26 14:16:25 INFO listobs   Date        Timerange (UTC)          Scan  FldId FieldName          nVis  Int(s)  SpwIds      ScanIntent
2011-08-26 14:16:25 INFO listobs   23-Aug-2010/01:00:25.0 - 01:01:00.5    16      1 J1925+2106          8008  7.79    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:01:10.0 - 01:02:30.0    17      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:02:40.0 - 01:04:00.0    18      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:04:10.0 - 01:05:29.5    19      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:05:39.0 - 01:06:59.0    20      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:07:12.0 - 01:08:29.0    21      2 G55.7+3.4          25064  9.33    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:08:39.0 - 01:09:59.0    22      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:10:09.0 - 01:11:29.0    23      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:11:39.0 - 01:12:58.5    24      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:13:08.0 - 01:14:28.0    25      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:14:38.0 - 01:15:58.0    26      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:16:08.0 - 01:17:28.0    27      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:17:38.0 - 01:18:57.5    28      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:19:07.0 - 01:20:27.0    29      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:20:37.0 - 01:21:57.0    30      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:22:07.0 - 01:23:27.0    31      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:23:37.0 - 01:24:56.5    32      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:25:06.0 - 01:26:26.0    33      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:26:36.0 - 01:27:56.0    34      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:28:06.0 - 01:29:26.0    35      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:29:36.0 - 01:30:55.5    36      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:31:05.0 - 01:32:25.0    37      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:32:35.0 - 01:33:55.0    38      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:34:05.0 - 01:35:25.0    39      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:35:35.0 - 01:36:54.5    40      2 G55.7+3.4          25272  9.88    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:37:07.0 - 01:38:24.0    41      1 J1925+2106          25064  9.26    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:38:34.0 - 01:39:54.0    42      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:40:04.0 - 01:41:23.5    43      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:41:36.5 - 01:42:53.5    44      2 G55.7+3.4          25064  9.26    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:43:03.0 - 01:44:23.0    45      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:44:33.0 - 01:45:53.0    46      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:46:03.0 - 01:47:23.0    47      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:47:33.0 - 01:48:52.5    48      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:49:02.0 - 01:50:22.0    49      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:50:32.0 - 01:51:52.0    50      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:52:02.0 - 01:53:22.0    51      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:53:32.0 - 01:54:51.5    52      2 G55.7+3.4          23400  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:55:01.0 - 01:56:21.0    53      2 G55.7+3.4          25272  9.95    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:56:31.0 - 01:57:51.0    54      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:58:01.0 - 01:59:21.0    55      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               01:59:31.0 - 02:00:50.5    56      2 G55.7+3.4          25272  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:01:00.0 - 02:02:20.0    57      2 G55.7+3.4          23608  9.92    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:02:30.0 - 02:03:50.0    58      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:04:00.0 - 02:05:20.0    59      2 G55.7+3.4          24648  9.93    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:05:30.0 - 02:06:49.5    60      2 G55.7+3.4          24440  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:06:59.0 - 02:08:19.0    61      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:08:29.0 - 02:09:49.0    62      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:09:59.0 - 02:11:18.5    63      2 G55.7+3.4          23400  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:11:32.0 - 02:12:48.5    64      1 J1925+2106          25064  9.26    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:12:58.0 - 02:14:18.0    65      1 J1925+2106          24024  9.78    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:14:28.0 - 02:15:47.5    66      1 J1925+2106          25272  9.86    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:16:01.0 - 02:17:18.0    67      2 G55.7+3.4          23200  9.37    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:17:28.0 - 02:18:47.5    68      2 G55.7+3.4          25272  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:18:57.0 - 02:20:17.0    69      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:20:27.0 - 02:21:47.0    70      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:21:57.0 - 02:23:17.0    71      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:23:27.0 - 02:24:47.0    72      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:24:57.0 - 02:26:16.5    73      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:26:26.0 - 02:27:46.0    74      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:27:56.0 - 02:29:16.0    75      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:29:26.0 - 02:30:46.0    76      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:30:56.0 - 02:32:15.5    77      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:32:25.0 - 02:33:45.0    78      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:33:55.0 - 02:35:15.0    79      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:35:25.0 - 02:36:45.0    80      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:36:55.0 - 02:38:14.5    81      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:38:24.0 - 02:39:44.0    82      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:39:54.0 - 02:41:14.0    83      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:41:24.0 - 02:42:44.0    84      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:42:54.0 - 02:44:13.5    85      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:44:23.0 - 02:45:42.5    86      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:45:56.0 - 02:47:13.0    87      1 J1925+2106          25064  9.34    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:47:23.0 - 02:48:43.0    88      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:48:53.0 - 02:50:12.5    89      1 J1925+2106          25272  9.83    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:50:25.0 - 02:51:42.0    90      2 G55.7+3.4          25064  9.28    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:51:52.0 - 02:53:12.0    91      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:53:22.0 - 02:54:42.0    92      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:54:52.0 - 02:56:11.5    93      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:56:21.0 - 02:57:41.0    94      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:57:51.0 - 02:59:11.0    95      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               02:59:21.0 - 03:00:41.0    96      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:00:51.0 - 03:02:10.5    97      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:02:20.0 - 03:03:40.0    98      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:03:50.0 - 03:05:10.0    99      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:05:20.0 - 03:06:40.0  100      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:06:50.0 - 03:08:09.5  101      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:08:19.0 - 03:09:39.0  102      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:09:49.0 - 03:11:09.0  103      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:11:19.0 - 03:12:39.0  104      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:12:49.0 - 03:14:08.5  105      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:14:18.0 - 03:15:38.0  106      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:15:48.0 - 03:17:08.0  107      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:17:18.0 - 03:18:38.0  108      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:18:48.0 - 03:20:07.5  109      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:20:20.0 - 03:21:37.0  110      1 J1925+2106          25064  9.26    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:21:47.0 - 03:23:07.0  111      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:23:17.0 - 03:24:36.5  112      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:24:49.5 - 03:26:06.5  113      2 G55.7+3.4          25064  9.26    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:26:16.0 - 03:27:36.0  114      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:27:46.0 - 03:29:06.0  115      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:29:16.0 - 03:30:36.0  116      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:30:46.0 - 03:32:05.5  117      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:32:15.0 - 03:33:35.0  118      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:33:45.0 - 03:35:05.0  119      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:35:15.0 - 03:36:35.0  120      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:36:45.0 - 03:38:04.5  121      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:38:14.0 - 03:39:34.0  122      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:39:44.0 - 03:41:04.0  123      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:41:14.0 - 03:42:34.0  124      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:42:44.0 - 03:44:03.5  125      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:44:13.0 - 03:45:33.0  126      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:45:43.0 - 03:47:03.0  127      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:47:13.0 - 03:48:33.0  128      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:48:43.0 - 03:50:02.5  129      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:50:12.0 - 03:51:32.0  130      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:51:42.0 - 03:53:02.0  131      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:53:12.0 - 03:54:31.5  132      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:54:45.0 - 03:56:02.0  133      1 J1925+2106          25064  9.35    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:56:12.0 - 03:57:31.5  134      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:57:41.0 - 03:59:00.5  135      1 J1925+2106          24440  9.77    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               03:59:14.0 - 04:00:31.0  136      2 G55.7+3.4          25064  9.27    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:00:41.0 - 04:02:01.0  137      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:02:11.0 - 04:03:30.5  138      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:03:40.0 - 04:05:00.0  139      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:05:10.0 - 04:06:30.0  140      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:06:40.0 - 04:08:00.0  141      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:08:10.0 - 04:09:29.5  142      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:09:39.0 - 04:10:59.0  143      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:11:09.0 - 04:12:29.0  144      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:12:39.0 - 04:13:59.0  145      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:14:09.0 - 04:15:28.5  146      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:15:38.0 - 04:16:58.0  147      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:17:08.0 - 04:18:28.0  148      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:18:38.0 - 04:19:58.0  149      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:20:08.0 - 04:21:27.5  150      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:21:37.0 - 04:22:57.0  151      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:23:07.0 - 04:24:27.0  152      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:24:37.0 - 04:25:57.0  153      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:26:07.0 - 04:27:26.5  154      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:27:36.0 - 04:28:55.5  155      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:29:10.5 - 04:30:26.0  156      1 J1925+2106          22512  9.97    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:30:36.0 - 04:31:56.0  157      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:32:06.0 - 04:33:25.5  158      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:33:45.0 - 04:34:55.0  159      2 G55.7+3.4          22464  9.9      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:35:05.0 - 04:36:25.0  160      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:36:35.0 - 04:37:55.0  161      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:38:05.0 - 04:39:24.5  162      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:39:34.0 - 04:40:54.0  163      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:41:04.0 - 04:42:24.0  164      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:42:34.0 - 04:43:54.0  165      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:44:04.0 - 04:45:23.5  166      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:45:33.0 - 04:46:53.0  167      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:47:03.0 - 04:48:23.0  168      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:48:33.0 - 04:49:53.0  169      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:50:03.0 - 04:51:22.5  170      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:51:32.0 - 04:52:52.0  171      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:53:02.0 - 04:54:22.0  172      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:54:32.0 - 04:55:52.0  173      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:56:02.0 - 04:57:21.5  174      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:57:31.0 - 04:58:51.0  175      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               04:59:01.0 - 05:00:21.0  176      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:00:31.0 - 05:01:51.0  177      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:02:01.0 - 05:03:20.5  178      2 G55.7+3.4          25272  9.84    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:03:40.0 - 05:04:50.0  179      1 J1925+2106          22464  9.95    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:05:00.0 - 05:06:20.0  180      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:06:30.0 - 05:07:49.5  181      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:08:04.5 - 05:09:19.5  182      2 G55.7+3.4          22752  9.76    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:09:29.0 - 05:10:49.0  183      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:10:59.0 - 05:12:19.0  184      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:12:29.0 - 05:13:49.0  185      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:13:59.0 - 05:15:18.5  186      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:15:28.0 - 05:16:48.0  187      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:16:58.0 - 05:18:18.0  188      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:18:28.0 - 05:19:48.0  189      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:19:58.0 - 05:21:17.5  190      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:21:27.0 - 05:22:47.0  191      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:22:57.0 - 05:24:17.0  192      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:24:27.0 - 05:25:47.0  193      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:25:57.0 - 05:27:17.0  194      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:27:27.0 - 05:28:46.5  195      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:28:56.0 - 05:30:16.0  196      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:30:26.0 - 05:31:46.0  197      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:31:56.0 - 05:33:16.0  198      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:33:26.0 - 05:34:45.5  199      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:34:55.0 - 05:36:15.0  200      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:36:25.0 - 05:37:44.5  201      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:37:59.0 - 05:39:15.0  202      1 J1925+2106          25272  9.09    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:39:25.0 - 05:40:44.5  203      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:40:54.0 - 05:42:13.5  204      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:42:28.0 - 05:43:44.0  205      2 G55.7+3.4          25272  9.08    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:43:54.0 - 05:45:14.0  206      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:45:24.0 - 05:46:43.5  207      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:46:53.0 - 05:48:13.0  208      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:48:23.0 - 05:49:43.0  209      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:49:53.0 - 05:51:13.0  210      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:51:23.0 - 05:52:42.5  211      2 G55.7+3.4          23400  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:52:52.0 - 05:54:12.0  212      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:54:22.0 - 05:55:42.0  213      2 G55.7+3.4          23608  9.92    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:55:52.0 - 05:57:12.0  214      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:57:22.0 - 05:58:41.5  215      2 G55.7+3.4          23400  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               05:58:51.0 - 06:00:11.0  216      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:00:21.0 - 06:01:41.0  217      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:01:51.0 - 06:03:11.0  218      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:03:21.0 - 06:04:40.5  219      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:04:50.0 - 06:06:10.0  220      2 G55.7+3.4          23608  9.92    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:06:20.0 - 06:07:40.0  221      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:07:50.0 - 06:09:10.0  222      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:09:20.0 - 06:10:39.5  223      2 G55.7+3.4          25272  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:10:49.0 - 06:12:08.5  224      2 G55.7+3.4          23608  9.81    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:12:22.5 - 06:13:39.0  225      1 J1925+2106          25272  9.16    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:13:49.0 - 06:15:09.0  226      1 J1925+2106          24856  9.85    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:15:19.0 - 06:16:38.5  227      1 J1925+2106          23608  9.81    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:16:51.5 - 06:18:08.0  228      2 G55.7+3.4          23200  9.2      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:18:18.0 - 06:19:38.0  229      2 G55.7+3.4          24640  9.83    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:19:48.0 - 06:21:08.0  230      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:21:18.0 - 06:22:37.5  231      2 G55.7+3.4          25272  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:22:47.0 - 06:24:07.0  232      2 G55.7+3.4          23608  9.92    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:24:17.0 - 06:25:37.0  233      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:25:47.0 - 06:27:07.0  234      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:27:17.0 - 06:28:36.5  235      2 G55.7+3.4          23400  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:28:46.0 - 06:30:06.0  236      2 G55.7+3.4          23600  9.91    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:30:16.0 - 06:31:36.0  237      2 G55.7+3.4          23400  9.97    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:31:46.0 - 06:33:06.0  238      2 G55.7+3.4          23600  9.91    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:33:16.0 - 06:34:35.5  239      2 G55.7+3.4          25272  9.86    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:34:45.0 - 06:36:05.0  240      2 G55.7+3.4          23608  9.93    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:36:15.0 - 06:37:35.0  241      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:37:45.0 - 06:39:05.0  242      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:39:15.0 - 06:40:34.5  243      2 G55.7+3.4          25272  9.87    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:40:44.0 - 06:42:04.0  244      2 G55.7+3.4          22008  9.83    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:42:14.0 - 06:43:34.0  245      2 G55.7+3.4          25272  9.96    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:43:44.0 - 06:45:04.0  246      2 G55.7+3.4          21800  9.92    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:45:14.0 - 06:46:33.5  247      2 G55.7+3.4          25272  9.86    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:46:47.0 - 06:48:03.5  248      1 J1925+2106          23632  9.14    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:48:13.0 - 06:49:33.0  249      1 J1925+2106          24232  9.95    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:49:43.0 - 06:51:02.5  250      1 J1925+2106          25064  9.85    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:51:16.0 - 06:52:32.5  251      2 G55.7+3.4          24856  9.1      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:52:42.0 - 06:54:02.0  252      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:54:12.0 - 06:55:32.0  253      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:55:42.0 - 06:57:02.0  254      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:57:12.0 - 06:58:32.0  255      2 G55.7+3.4          25272  9.99    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               06:58:42.0 - 07:00:01.5  256      2 G55.7+3.4          23400  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:00:11.0 - 07:01:31.0  257      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:01:41.0 - 07:03:01.0  258      2 G55.7+3.4          23400  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:03:11.0 - 07:04:31.0  259      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:04:41.0 - 07:06:00.5  260      2 G55.7+3.4          23400  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:06:10.0 - 07:07:30.0  261      2 G55.7+3.4          25272  9.99    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:07:40.0 - 07:09:00.0  262      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:09:10.0 - 07:10:30.0  263      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:10:40.0 - 07:11:59.5  264      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:12:09.0 - 07:13:29.0  265      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:13:39.0 - 07:14:59.0  266      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:15:09.0 - 07:16:29.0  267      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:16:39.0 - 07:17:58.5  268      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:18:08.0 - 07:19:28.0  269      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:19:38.0 - 07:20:57.5  270      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:21:11.0 - 07:22:28.0  271      1 J1925+2106          25064  9.38    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:22:38.0 - 07:23:57.5  272      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:24:07.0 - 07:25:26.5  273      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:25:40.0 - 07:26:57.0  274      2 G55.7+3.4          25064  9.37    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:27:07.0 - 07:28:27.0  275      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:28:37.0 - 07:29:56.5  276      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:30:06.0 - 07:31:26.0  277      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:31:36.0 - 07:32:56.0  278      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:33:06.0 - 07:34:26.0  279      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:34:36.0 - 07:35:55.5  280      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:36:05.0 - 07:37:25.0  281      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:37:35.0 - 07:38:55.0  282      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:39:05.0 - 07:40:25.0  283      2 G55.7+3.4          25272  9.98    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:40:35.0 - 07:41:54.5  284      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:42:04.0 - 07:43:24.0  285      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:43:34.0 - 07:44:54.0  286      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:45:04.0 - 07:46:24.0  287      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:46:34.0 - 07:47:53.5  288      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:48:03.0 - 07:49:23.0  289      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:49:33.0 - 07:50:53.0  290      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:51:03.0 - 07:52:23.0  291      2 G55.7+3.4          25272  9.95    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:52:33.0 - 07:53:52.5  292      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:54:02.0 - 07:55:21.5  293      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:55:35.0 - 07:56:52.0  294      1 J1925+2106          25064  9.38    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:57:02.0 - 07:58:22.0  295      1 J1925+2106          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               07:58:32.0 - 07:59:51.5  296      1 J1925+2106          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_PHASE.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:00:04.0 - 08:01:21.0  297      2 G55.7+3.4          25064  9.38    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:01:31.0 - 08:02:51.0  298      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:03:01.0 - 08:04:21.0  299      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:04:31.0 - 08:05:50.5  300      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:06:00.0 - 08:07:20.0  301      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:07:30.0 - 08:08:50.0  302      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:09:00.0 - 08:10:20.0  303      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:10:30.0 - 08:11:49.5  304      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:11:59.0 - 08:13:19.0  305      2 G55.7+3.4          25272  10      [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:13:29.0 - 08:14:48.5  306      2 G55.7+3.4          25272  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    OBSERVE_TARGET.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:17:50.5 - 08:17:50.5  308      3 0542+498=3C147      80    4        [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_AMPLI.UNSPECIFIED,UNSPECIFIED.UNSPECIFIED,CALIBRATE_BANDPASS.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:17:59.0 - 08:19:18.5  309      3 0542+498=3C147      17152  9.36    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_AMPLI.UNSPECIFIED,UNSPECIFIED.UNSPECIFIED,CALIBRATE_BANDPASS.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:19:28.0 - 08:20:48.0  310      3 0542+498=3C147      18216  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_AMPLI.UNSPECIFIED,UNSPECIFIED.UNSPECIFIED,CALIBRATE_BANDPASS.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:20:58.0 - 08:22:18.0  311      3 0542+498=3C147      18216  10      [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_AMPLI.UNSPECIFIED,UNSPECIFIED.UNSPECIFIED,CALIBRATE_BANDPASS.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:22:28.0 - 08:23:47.5  312      3 0542+498=3C147      18216  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_AMPLI.UNSPECIFIED,UNSPECIFIED.UNSPECIFIED,CALIBRATE_BANDPASS.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs               08:23:57.0 - 08:25:16.5  313      3 0542+498=3C147      18216  9.89    [0, 1, 2, 3, 4, 5, 6, 7]    CALIBRATE_AMPLI.UNSPECIFIED,UNSPECIFIED.UNSPECIFIED,CALIBRATE_BANDPASS.UNSPECIFIED
2011-08-26 14:16:25 INFO listobs           (nVis = Total number of time/baseline visibilities per scan)
2011-08-26 14:16:26 INFO listobs Fields: 3
2011-08-26 14:16:26 INFO listobs   ID  Code Name                RA              Decl          Epoch  SrcId nVis 
2011-08-26 14:16:26 INFO listobs   1    D    J1925+2106          19:25:59.60537 +21.06.26.1622 J2000  1    1004816
2011-08-26 14:16:26 INFO listobs   2    NONE G55.7+3.4          19:21:40.00000 +21.45.00.0000 J2000  2    6248936
2011-08-26 14:16:26 INFO listobs   3    N    0542+498=3C147      05:42:36.13792 +49.51.07.2336 J2000  3    90096 
2011-08-26 14:16:26 INFO listobs   (nVis = Total number of time/baseline visibilities per field)
2011-08-26 14:16:27 INFO listobs Spectral Windows:  (8 unique spectral windows and 1 unique polarization setups)
2011-08-26 14:16:27 INFO listobs   SpwID  #Chans Frame Ch1(MHz)    ChanWid(kHz)  TotBW(kHz)  Corrs         
2011-08-26 14:16:27 INFO listobs   0          64 TOPO  1000        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   1          64 TOPO  1128        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   2          64 TOPO  1256        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   3          64 TOPO  1384        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   4          64 TOPO  1520        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   5          64 TOPO  1648        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   6          64 TOPO  1776        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs   7          64 TOPO  1904        2000          128000      RR  RL  LR  LL 
2011-08-26 14:16:27 INFO listobs Sources: 24
2011-08-26 14:16:27 INFO listobs   ID  Name                SpwId RestFreq(MHz)  SysVel(km/s)
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          0    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          1    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          2    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          3    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          4    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          5    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          6    -              -           
2011-08-26 14:16:27 INFO listobs   1    J1925+2106          7    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          0    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          1    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          2    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          3    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          4    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          5    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          6    -              -           
2011-08-26 14:16:27 INFO listobs   2    G55.7+3.4          7    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      0    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      1    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      2    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      3    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      4    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      5    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      6    -              -           
2011-08-26 14:16:27 INFO listobs   3    0542+498=3C147      7    -              -           
2011-08-26 14:16:30 INFO listobs Antennas: 27:
2011-08-26 14:16:30 INFO listobs   ID  Name  Station  Diam.    Long.        Lat.       
2011-08-26 14:16:30 INFO listobs   0    ea01  W09      25.0 m  -107.37.25.2  +33.53.51.0 
2011-08-26 14:16:30 INFO listobs   1    ea02  E02      25.0 m  -107.37.04.4  +33.54.01.1 
2011-08-26 14:16:30 INFO listobs   2    ea03  E09      25.0 m  -107.36.45.1  +33.53.53.6 
2011-08-26 14:16:30 INFO listobs   3    ea04  W01      25.0 m  -107.37.05.9  +33.54.00.5 
2011-08-26 14:16:30 INFO listobs   4    ea05  W08      25.0 m  -107.37.21.6  +33.53.53.0 
2011-08-26 14:16:30 INFO listobs   5    ea06  N06      25.0 m  -107.37.06.9  +33.54.10.3 
2011-08-26 14:16:30 INFO listobs   6    ea07  E05      25.0 m  -107.36.58.4  +33.53.58.8 
2011-08-26 14:16:30 INFO listobs   7    ea08  N01      25.0 m  -107.37.06.0  +33.54.01.8 
2011-08-26 14:16:30 INFO listobs   8    ea09  E06      25.0 m  -107.36.55.6  +33.53.57.7 
2011-08-26 14:16:30 INFO listobs   9    ea10  N03      25.0 m  -107.37.06.3  +33.54.04.8 
2011-08-26 14:16:30 INFO listobs   10  ea11  E04      25.0 m  -107.37.00.8  +33.53.59.7 
2011-08-26 14:16:30 INFO listobs   11  ea12  E08      25.0 m  -107.36.48.9  +33.53.55.1 
2011-08-26 14:16:30 INFO listobs   12  ea13  N07      25.0 m  -107.37.07.2  +33.54.12.9 
2011-08-26 14:16:30 INFO listobs   13  ea15  W06      25.0 m  -107.37.15.6  +33.53.56.4 
2011-08-26 14:16:30 INFO listobs   14  ea16  W02      25.0 m  -107.37.07.5  +33.54.00.9 
2011-08-26 14:16:30 INFO listobs   15  ea17  W07      25.0 m  -107.37.18.4  +33.53.54.8 
2011-08-26 14:16:30 INFO listobs   16  ea18  N09      25.0 m  -107.37.07.8  +33.54.19.0 
2011-08-26 14:16:30 INFO listobs   17  ea19  W04      25.0 m  -107.37.10.8  +33.53.59.1 
2011-08-26 14:16:30 INFO listobs   18  ea20  N05      25.0 m  -107.37.06.7  +33.54.08.0 
2011-08-26 14:16:30 INFO listobs   19  ea21  E01      25.0 m  -107.37.05.7  +33.53.59.2 
2011-08-26 14:16:30 INFO listobs   20  ea22  N04      25.0 m  -107.37.06.5  +33.54.06.1 
2011-08-26 14:16:30 INFO listobs   21  ea23  E07      25.0 m  -107.36.52.4  +33.53.56.5 
2011-08-26 14:16:30 INFO listobs   22  ea24  W05      25.0 m  -107.37.13.0  +33.53.57.8 
2011-08-26 14:16:30 INFO listobs   23  ea25  N02      25.0 m  -107.37.06.2  +33.54.03.5 
2011-08-26 14:16:30 INFO listobs   24  ea26  W03      25.0 m  -107.37.08.9  +33.54.00.1 
2011-08-26 14:16:30 INFO listobs   25  ea27  E03      25.0 m  -107.37.02.8  +33.54.00.5 
2011-08-26 14:16:30 INFO listobs   26  ea28  N08      25.0 m  -107.37.07.5  +33.54.15.8 
</pre>
 
We can see that there are three sources in this observation:
 
* J1925+2106, field ID 1: the phase calibrator;
* G55.7+3.4, field ID 2: the supernova remnant;
* 0542+498=3C147, field ID 3: the flux and bandpass calibrator.
 
We can also see that these sources have associated "scan intents", which indicate their function in the observation, and may be selected on using CASA tasks.  In particular,
 
* CALIBRATE_PHASE indicates that this is a scan to be used for gain calibration;
* OBSERVE_TARGET indicates that this is the science target;
* CALIBRATE_AMPLI indicates that this is to be used for flux calibration; and
* CALIBRATE_BANDPASS indicates that these scans are to be used for bandpass calibration.
 
Note that 3C147 is to be used for both flux and bandpass calibration.
 
We can see the antenna configuration for this observation using {{plotants}}:
 
<source lang="python">
# In CASA
plotants('G55.7+3.4_10s.ms')
</source>
 
[[Image:plotAnts.png|200px|thumb|right|plotants image]]
 
This shows that antennas ea01, ea18, and ea03 were on the extreme ends of the west, north, and east arms, respectively.  The antenna position diagram is particularly useful in determining if a co-located set of antennas is affected, which can help with flagging.
 
We may also inspect the raw data using {{plotms}}.  To start with, let's look at a subset of scans on the supernova remnant:
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='30,75,120,165,190,235,303',
      antenna='ea24', xaxis='freq', yaxis='amp', coloraxis='spw',
      iteraxis='scan', correlation='rr,ll')
</source>
 
The <tt>coloraxis</tt> parameter indicates that a different color will be assigned to each spectral window, and the <tt>iteraxis</tt> parameter tells plotms to display a new plot for each scan.  We have chosen only one antenna (ea24) and just the right and left circular polarizations (without the cross-hand terms) to reduce the amount of data in the selection, One can flip through these plots using the green arrows located at the bottom of the plotting gui: the double-left arrow will display the very first plot in the set, the single left arrow will go back one plot, and the right arrows have similar behavior for moving forward in the set. 
 
[[Image:PlotMS1.png|200px|thumb|right|plotms image]]
 
Flipping through the scans, it's clear that there is significant time- and frequency-variable RFI present in this observation.  Since this is L-band data taken in the most compact EVLA configuration ("D"), this comes as no surprise.  However, it also poses one of the greatest challenges for obtaining a good image.
 
In particular, we can see that two spectral windows (SPWs) are quite badly affected.  To determine which these are, click in the "Mark Regions" tool at the bottom of the gui (the open box with a green "plus" sign), and use the mouse to select a few of the highest-amplitude points in each of these SPWs.  Click on the "Locate" button (magnifying glass), and information associated with the selected points will be displayed in the logger window:
 
<pre>
2011-08-26 14:55:51 INFO PlotMS Frequency in [1.23 1.25833] or [1.58167 1.62833], Amp in [23.0201 25.6823] or [59.5078 62.6398]:
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:20:57.0 BL=ea03&ea24[2&22] Spw=1 Chan=59 Freq=1.246 Corr=RR X=1.246 Y=23.032  (73964/11/748)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:20:57.0 BL=ea12&ea24[11&22] Spw=1 Chan=59 Freq=1.246 Corr=RR X=1.246 Y=23.5243  (76268/11/3052)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:07.0 BL=ea03&ea24[2&22] Spw=1 Chan=59 Freq=1.246 Corr=RR X=1.246 Y=23.6116  (80620/12/748)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:07.0 BL=ea12&ea24[11&22] Spw=1 Chan=59 Freq=1.246 Corr=RR X=1.246 Y=23.4432  (82924/12/3052)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:17.0 BL=ea03&ea24[2&22] Spw=1 Chan=59 Freq=1.246 Corr=RR X=1.246 Y=23.1712  (87276/13/748)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:37.0 BL=ea03&ea24[2&22] Spw=1 Chan=59 Freq=1.246 Corr=LR X=1.246 Y=23.2663  (100590/15/750)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:47.0 BL=ea03&ea24[2&22] Spw=1 Chan=59 Freq=1.246 Corr=LR X=1.246 Y=23.4466  (107246/16/750)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:57.0 BL=ea03&ea24[2&22] Spw=1 Chan=59 Freq=1.246 Corr=RR X=1.246 Y=23.7536  (113900/17/748)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:07.0 BL=ea12&ea24[11&22] Spw=4 Chan=41 Freq=1.602 Corr=RR X=1.602 Y=61.9097  (262564/39/2980)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:17.0 BL=ea12&ea24[11&22] Spw=4 Chan=41 Freq=1.602 Corr=RR X=1.602 Y=61.1769  (269220/40/2980)
2011-08-26 14:55:51 INFO PlotMS Scan=30 Field=G55.7+3.4[2] Time=2010/08/23/01:21:27.0 BL=ea12&ea24[11&22] Spw=4 Chan=41 Freq=1.602 Corr=RR X=1.602 Y=60.1834  (275876/41/2980)
2011-08-26 14:55:51 INFO PlotMS Found 11 points (11 unflagged) among 479232 in 0.04s.
</pre>
 
We can see that SPWs 1 and 4 are among the worst affected by RFI.  At this point, feel free to play around a bit more with {{plotms}}; you might try experimenting with different axes for iteration (under the "Iter" left-hand tab), different data selection parameters (under "Data"), different axes ("Axes"), or different averaging techniques (under "Data").
 
== A priori calibration and flagging ==
 
Before we proceed with further processing, we should check the observation log to see if there were any issues noted during the run that need to be addressed.  The observing log file is linked to the [[https://archive.nrao.edu/archive/ArchiveQuery?PASSWD=&QUERYTYPE=ARCHIVE&PROTOCOL=HTML&SORT_PARM=Starttime&SORT_ORDER=Asc&MAX_ROWS=NO+LIMIT&SORT_PARM2=Starttime&SORT_ORDER2=Asc&QUERY_ID=9999&QUERY_MODE=Prepare+Download&LOCKMODE=PROJECT&SITE_CODE=AOC&DBHOST=CHEWBACCA&WRITELOG=0&PROJECT_CODE=&SEGMENT=&OBSERVER=&ARCHIVE_VOLUME=AB1345_sb1800808_1.55431.004049953706&TIMERANGE1=&TIMERANGE2=&SOURCE_ID=&SRC_SEARCH_TYPE=SIMBAD+or+NED+Resolver&CALIB_TYPE=ALL+Srcs&CENTER_RA=&LONG_RANGE=&FRAME=Equatorial&CENTER_DEC=&LAT_RANGE=&EQUINOX=J2000&SRAD=10.0%27&MIN_EXPOSURE=&OBS_BANDS=ALL&TELESCOPE=EVLA&OBS_MODE=ALL&CORR_MODE=ALL&TELESCOPE_CONFIG=ALL&OBS_POLAR=ALL&SUBARRAY=ALL&OBSFREQ1=&DATATYPE=ALL&OBSBW1=&ARCHFORMAT=ALL&SUBMIT=Submit+Query archive web page]] for this observation (at far right; under "logs etc.").  Looking at the log, we can see that antenna ea07 may need a position correction, and antennas ea06, ea17, ea20, and ea26 did not have L-band receivers installed at the time and should be flagged.
 
=== Antenna position correction ===
 
Correcting the position of an antenna is done with the task {{gencal}}.  This is important, because the observed visibilities are a function of <math>u</math> and <math>v</math>.  If an antenna's position is incorrect, then <math>u</math> and <math>v</math> will be calculated incorrectly, and there will be errors in any image derived from the data.  (These corrections could also be determined later by a baseline-based calibration incorporating the <math>b_{ij}</math> term from the equation above, but since they are known  <i>a priori</i> it makes sense to incorporate them now.)
 
Any corrections can be ascertained from the [http://www.vla.nrao.edu/astro/archive/baselines/ EVLA/VLA Baseline Corrections] site.  For future reference, be sure to read to the bottom of that document to see how to calculate the additive corrections.  Fortunately, the current case is simple as there is only a single correction for antenna ea07. 
 
To find the necessary x, y, and z-offsets to perform the position correction, first select the year "2010" for the EVLA baseline corrections.  From the log, we know that the observation was performed on 23 August 2010; looking at the position table, we can see that antenna ea07 was moved on 5 August, but that the updated position was not included in the online system's database until 15 September.  Therefore, we need to record the x, y, and z-position information for this antenna and input it into {{gencal}} to create a position-correction calibration table:
 
<source lang="python">
# In CASA
gencal(vis='G55.7+3.4_10s.ms', caltable='G55.7+3.4_10s.pos',
      caltype='antpos', antenna='ea07',
      parameter=[0.0087, 0.0137,  0.0000])
</source>
 
We will carry this table throughout the calibration to account for the revised antenna position for ea07.
 
=== Flagging non-operational antennas ===
 
In addition to updating the position for antenna ea07, we have to flag antennas ea06, ea17, ea20, and ea26, since these did not have working L-band receivers at the time of observation.  We do this with the task {{flagdata}}:
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag',
        antenna='ea06,ea17,ea20,ea26')
</source>
 
Note that the first thing {{flagdata}} does is create a backup flag file, in this case named "manualflag_1".  This flag file contains a copy of the flags present in the MS prior to the requested flagging operation.  Since these flag files take up a fair amount of space (in this particular case, 230 MB), we won't me making them every time we run flagdata -- the automatic flag backup can be turned off by setting flagbackup=False.  However, it's good to keep a record of the names of the backup files and the associated processing step, in case you wish to restore a previous version of the flags.
 
=== Flagging shadowed antennas and zero-amplitude data ===
 
Since this is the most compact EVLA configuration, there may be instances where one antenna blocks, or "shadows" another.  Therefore, we will run {{flagdata}} to remove these data:
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='shadow',
        flagbackup=False)
</source>
 
In this particular observation, there appears not to be any data affected by shadowing.
 
In addition, there may be times during which the correlator writes out pure zero-valued data.  In order to remove this bad data, we run {{flagdata}} to clip against the data values:
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag',
        clipminmax=[0.0, 1E-10], flagbackup=False,
        clipoutside=False, clipcolumn='DATA',
        clipexpr=['ABS RR','ABS LL','ABS RL','ABS LR'])
</source>
 
* clipminmax=[0.0, 1E-10]: this is the clip range to be used.  Since we cannot give it [0.0, 0.0], the second value is extremely low to pick up only zero-valued data.
* clipoutside=False: tells {{flagdata}} which data to flag; in this case; we wish to flag <i>inside</i> the specified data range.
* clipcolumn='DATA': the column on which to flag.
* clipexpr=['ABS RR','ABS LL','ABS RL','ABS LR']: flag any correlation which is zero-valued. 
 
Inspecting the logger output which is generated by {{flagdata}} shows that there is a very small quantity of zero-valued data present in this MS.
 
== Automatic RFI excision ==
 
Now, we move on to one of the most difficult parts of L-band, D-configuration data processing: excising the RFI.  For the original reduction of this MS, flagging was done by hand and took several weeks.  The resulting data are offered as an option for the imaging stage of this tutorial (because the care, by-hand flagging does yield a better image); however, it's not practical to undertake this endeavor for the present workshop. 
 
Therefore, we will demonstrate the use of the automatic RFI excision task, <tt>testautoflag</tt>, currently available in CASA.  <b>It should be noted that this task is under development, and we expect changes and improvements to be made at a rapid pace over the course of the next year or so.</b>
 
=== Hanning-smoothing data ===
 
Prior to flagging any data which is affect by strong RFI, one should Hanning-smooth over channel to remove Gibbs ringing.  This is done with the task {{hanningsmooth}}, which can either write a new, Hanning-smoothed MS or directly operate on the requested column of the input MS.  To conserve space, we will request the latter:
 
<source lang="python">
# In CASA
hanningsmooth(vis='G55.7+3.4_10s.ms', datacolumn='data')
</source>
 
This task will take a little while to run (likely around 10 minutes). 
 
[[Image:PlotMS2.png|200px|thumb|left|before Hanning smoothing]]
[[Image:PlotMS3.png|200px|thumb|right|after Hanning smoothing]]
 
We can compare the Hanning-smoothed data with the raw data by plotting a subset of data to show the result of Hanning-smoothing (see plots to the left and right).
 
As you can see, the smoothing has spread the single-channel RFI into three channels, but has also removed the effects of some of the worst RFI from a number of channels.  Overall, this will improve our ability to flag RFI from the data and retain as much good data as possible.
 
Unfortunately, {{hanningsmooth}} will also remove the MODEL_DATA and CORRECTED_DATA (also known as the "scratch") columns, so to add these back in, we must run {{clearcal}}:
 
<source lang="python">
# In CASA
clearcal(vis='G55.7+3.4_10s.ms')
</source>
 
This will also take a little while to run (again, around 10 minutes), since it will be writing approximately 22 GB back to disk.
 
=== Using phase calibration source for preliminary bandpass calibration ===
 
In order to get the best possible result from the automatic RFI excision, we will first apply bandpass calibration to the MS.  Since the RFI is time-variable, using the phase calibration source to make an average bandpass over the entire observation will mitigate the amount of RFI present in the calculated bandpass.  (For the final calibration, we will use the designated bandpass source 3C147; however, since this object was only observed in the last set of scans, it doesn't sample the time variability and would not provide a good average bandpass.)
 
Since there are likely to be gain variations over the course of the observation, we will run {{gaincal}} to solve for an initial set of antenna-based phases over a narrow range of channels.  These will be used to create the bandpass solutions.  While amplitude variations will have little effect on the bandpass solutions, it is important to solve for these phase variations with sufficient time resolution to prevent decorrelation when vector averaging the data in computing the bandpass solutions.
 
In order to choose a narrow range of channels for each spectral window which are relatively RFI-free over the course of the observation, we can look at the data with {{plotms}}.  Note that it's important to only solve for phase using a narrow channel range, since an antenna-specific delay will cause the phase to vary with respect to frequency over the spectral window, perhaps by a substantial amount.
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='30,75,120,165,190,235,303',
      antenna='ea24', xaxis='channel', yaxis='amp', iteraxis='spw',
      yselfscale=True, correlation='rr,ll')
</source>
 
* yselfscale=True: sets the y-scaling to be for the currently displayed spectral window, since some spectral windows have much worse RFI and will skew the scale for others.
 
Looking at these plots, we can choose appropriate channel ranges for each SPW:
 
<pre>
SPW 0: 10-13
SPW 1: 30-33
SPW 2: 32-35
SPW 3: 30-33
SPW 4: 35-38
SPW 5: 30-33
SPW 6: 30-33
SPW 7: 46-49
</pre>
 
Using these channel ranges, we run {{gaincal}} to perform phase-only solutions over the course of the observation:
 
<source lang="python">
# In CASA
gaincal(vis='G55.7+3.4_10s.ms', caltable='G55.7+3.4_10s.initPh',
        intent='CALIBRATE_PHASE*', solint='int',
        spw='0:10~13,1;3;5~6:30~33,2:32~35,4:35~38,7:46~49',
        refant='ea24', minblperant=3,
        minsnr=3.0, calmode='p', gaintable='G55.7+3.4_10s.pos')
</source>
 
* caltable='G55.7+3.4_10s.initPh': this is the output calibration table that will be written.
* intent='CALIBRATE_PHASE*': this is the way we have chosen to select data.  Alternatively, we could have used "field='J1925+2106'", since this is the only source with the CALIBRATE_PHASE* scan intent.  Note the use of the wildcard character "*" at the end of the string; this accounts for the fact that all the intents end with ".UNSPECIFIED". We could just as well have used "*PHASE*".
* solint='int': we request a solution for each 10-second integration.
* spw='0:10~13,1;3;5~6:30~33,2:32~35,4:35~38,7:46~49': note the syntax of this selection: a ":" is used to separate the SPW from channel selection, ";" is used to separate <i>within</i> this selection, and "~" is used to indicate an inclusive range. 
* refant='ea24': we have chosen ea24 as the reference antenna after inspecting the antenna position diagram (see above).  It is relatively close to, but not directly in, the center of the array, which could be important in D-configuration, since you don't want the reference antenna to have a high probability of being shadowed by nearby antennas.
* minblperant=3: the minimum number of baselines which must be present to attempt a phase solution.
* minsnr=3.0: the minimum signal-to-noise a solution must have to be considered acceptable.  Note that solutions which fail this test will cause these data to be flagged downstream of this calibration step.
* calmode='p': perform phase-only solutions.
* gaintable='G55.7+3.4_10s.pos': use the antenna position correction for ea07 that we created earlier.
 
Note that a number of solutions do not pass the requirements of the minimum 3 baselines (generating the terminal message "Insufficient unflagged antennas to proceed with this solve.") or minimum signal-to-noise ratio (outputting "n of x solutions rejected due to SNR < 3 ...").  A particularly large number of solutions are rejected in SPW 4, where the RFI is most severe.
 
[[Image:plotcal1.png|200px|thumb|right|Phases for antenna ea09]]
[[Image:plotcal2.png|200px|thumb|right|Phases in SPW 4]]
 
We can inspect the resulting calibration table with {{plotcal}}:
 
<source lang="python">
# In CASA
plotcal(caltable='G55.7+3.4_10s.initPh', xaxis='time', yaxis='phase',
        iteration='antenna', spw='0', plotrange=[-1,-1,-180,180])
</source>
 
This iterates over antenna for a single spectral window; we can see that the phase does not change much over the course of the observation for SPW 0.  We may also iterate over spectral window for a subset of antennas:
 
<source lang="python">
# In CASA
plotcal(caltable='G55.7+3.4_10s.initPh', xaxis='time', yaxis='phase',
        iteration='spw', antenna='ea01,ea05,ea24', plotrange=[-1,-1,-180,180])
</source>
 
Clearly, the phases are affected by RFI in some places, especially in SPW 4.
 
Using this phase information, we create time-averaged bandpass solutions for the phase calibration source:
 
<source lang="python">
# In CASA
bandpass(vis='G55.7+3.4_10s.ms', caltable='G55.7+3.4_10s.initBP',
        intent='CALIBRATE_PHASE*', solint='inf',
        combine='scan', refant='ea24', minblperant=3, minsnr=10.0,
        gaintable=['G55.7+3.4_10s.pos', 'G55.7+3.4_10s.initPh'],
        interp=['', 'nearest'])
</source>
 
* solint='inf', combine='scan': this requests that the solution interval be combined over scan, so that we will get one solution per antenna.
* gaintable=['G55.7+3.4_10s.pos', 'G55.7+3.4_10s.initPh']: we will pre-apply both the corrected antenna position as well as the initial phase solutions.
* interp=['', 'nearest']: by default, {{gaincal}} will use linear interpolation for pre-applied calibration.  However, we want the <i>nearest</i> phase solution to be used for a given time.
 
Again, we can see that a number of solutions have been rejected by our choices of <tt>minblperant</tt> and <tt>minsnr</tt>.
 
[[Image:plotcal3.png|200px|thumb|right|Bandpasses for antennas ea20 - ea28]]
 
We may plot the bandpasses with plotcal; first looking at the amplitudes:
 
<source lang="python">
# In CASA
plotcal(caltable='G55.7+3.4_10s.initBP', xaxis='freq', yaxis='amp',
        iteration='antenna', subplot=331)
</source>
 
* subplot=331: displays 3x3 plots per screen
 
Also, we can look at the phase solutions:
 
<source lang="python">
# In CASA
plotcal(caltable='G55.7+3.4_10s.initBP', xaxis='freq', yaxis='phase',
        iteration='antenna', subplot=331)
</source>
 
We can see that SPW 4 is virtually wiped out by RFI; furthermore, there are channels in SPW 1 that are consistently badly affected.  Prior to running <tt>testautoflag</tt>, we will flag these manually.  In addition, we will flag the first 9 channels in SPW 0, since this is affected by an issue which causes the noise to be substantially higher:
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag', spw='0:0~8,1:41~63,4')
</source>
 
Note that this has created a backup flag file called "manualflag_2".  Now we apply the antenna position correction and this bandpass calibration to the data:
 
<source lang="python">
# In CASA
applycal(vis='G55.7+3.4_10s.ms',
        gaintable=['G55.7+3.4_10s.pos', 'G55.7+3.4_10s.initBP'],
        calwt=False)
</source>
 
This operation will flag data for which correspond to flagged solutions, so {{applycal}} makes a backup version of the flags prior to operating on the data -- in this case, it's called "before_applycal_1".  Note that running {{applycal}} will take a little while, likely around 15 minutes.
 
To see the corrected data, we can plot the data as we did before, choosing "ydatacolumn='corrected'" this time:
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='30,75,120,165,190,235,303',
      antenna='ea24', xaxis='freq', yaxis='amp', coloraxis='spw',
      iteraxis='scan', ydatacolumn='corrected')
</source>
 
Note that some of the worst RFI is no longer there; also note that the amplitude scale has changed, since the bandpass solutions include amplitude scaling.
 
=== Running testautoflag ===
 
Now that we have bandpass-corrected data with some of the worst RFI flagged out, we will run <tt>testautoflag</tt>.  Note that there are many parameters which may be tweaked:
 
<source lang="python">
# In CASA
CASA <26>: inp testautoflag
---------> inp(testautoflag)
#  testautoflag :: Task for automatic identification and flagging of RFI
vis                =        ''        #  Name of measurement set
field              =        ''        #  Field names or field index numbers: ''==>all, field='0~2,3C286'
spw                =        ''        #  spectral-window/frequency/channel
selectdata          =      False        #  Other data selection parameters (antenna, timerange etc)
datacolumn          =    'data'        #  Data column on which to operate (data,corrected,model,residual)
ntime              =        100        #  Time-range (seconds) to use for each chunk
corrs              =        []        #  list of ones/zeros to choose correlations (e.g. [1,0,0,1]). Default(all)
tfcrop              =      True        #  Automatic identification and flagging of narrow-band RFI
    timecutoff    =        4.0        #  Flagging thresholds in units of deviation from the fit
    freqcutoff    =        3.0        #  Flagging thresholds in units of deviation from the fit
    timefit        =    'line'        #  Fitting function for the time direction (poly/line)
    freqfit        =    'poly'        #  Fitting function for the frequency direction (poly/line)
    maxnpieces    =          7        #  Number of pieces in the polynomial-fits (for 'freqfit' or 'timefit' = 'poly')
    flagdimension  = 'freqtime'        #  Dimensions along which to calculate fits (freq/time/freqtime/timefreq)
    usewindowstats =    'none'        #  Calculate additional flags using sliding window statistics (none,sum,std,both)
    halfwin        =          1        #  Half-width of sliding window to use with 'usewindowstats' (1,2,3).
 
extendflags        =      True        #  Extend flags in various ways
    extendpols    =      False        #  If any correlation is flagged, flag all correlations
    growtime      =      50.0        #  Flag all 'ntime' integrations if more than X% of the timerange is flagged (0-100)
    growfreq      =      50.0        #  Flag all selected channels if more than X% of the frequency range is flagged(0-100)
    growaround    =      True        #  Flag data based on surrounding flags
    flagneartime  =      False        #  Flag one timestep before and after a flagged one (True/False)
    flagnearfreq  =      False        #  Flag one channel before and after a flagged one (True/False)
 
datadisplay        =      False        #  Display data and flags at runtime
plotsummary        =      False        #  Parse the flag counts and show some plots at the end (True/False)
usepreflags        =      True        #  Use flags already present in the MS
preflagzeros        =      True        #  Flag visibilities with values equal to 0.0
writeflags          =      False        #  Write Flags to the MS
async              =      False        #  If true the taskname must be started using testautoflag(...)
</source>
 
Following are a set of <tt>testautoflag</tt> commands which have been found to work reasonably well with these data.  Please take some time to play with the parameters and the plotting capabilities.  Since these runs set "datadisplay=True" and "writeflags=False", the flags are displayed but not actually written to the MS.  This allows one to try different sets of parameters before actually applying the flags to the data.
 
Some representative plots are also displayed; note that <tt>testautoflag</tt> works quite well with narrow-band RFI but struggles with wide-band RFI or spectral windows where many channels have already been flagged.
 
[[Image:autoflag1.png|200px|thumb|right|testautoflag screenshot]]
[[Image:autoflag2.png|200px|thumb|right|testautoflag screenshot]]
[[Image:autoflag3.png|200px|thumb|right|testautoflag screenshot]]
 
<source lang="python">
# In CASA
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='0',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=2.7,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='1',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=2.7,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='2',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=2.8,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='3',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=3,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='5',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=3,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='6',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=3.5,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', field='2', spw='7',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            datadisplay=True, timecutoff=4, freqcutoff=3,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
</source>
 
Once you are happy (or as much so as possible), run <tt>testautoflag</tt> with "writeflags=True" to write the flags to the data.  Note that we are now flagging all sources, and the spectral windows have been grouped according to the "freqcutoff" parameter, which is the only parameter that has changed in this example.  Of course, the amount of time one may spend investigating the data and trying different parameters could be vast; it's important to keep in mind that the reason we're using automatic flagging in the first time is the minimize the amount of time a human must spend worrying about RFI excision...
 
<source lang="python">
# In CASA
testautoflag(vis='G55.7+3.4_10s.ms', spw='0~1',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            writeflags=True, timecutoff=4, freqcutoff=2.7,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', spw='2',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            writeflags=True, timecutoff=4, freqcutoff=2.8,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', spw='3,5,7',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            writeflags=True, timecutoff=4, freqcutoff=3,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
 
testautoflag(vis='G55.7+3.4_10s.ms', spw='6',
            datacolumn='corrected', freqfit='line',
            timefit='poly', maxnpieces=1, ntime=200,
            writeflags=True, timecutoff=4, freqcutoff=3.5,
            extendpols=True, preflagzeros=False, flagnearfreq=True)
</source>
 
Running <tt>testautoflag</tt> will take some time (likely around 15 minutes), as the task must pass through all of the data in the MS.  As it runs, the logger will display the fraction of data flagged in each "chunk", as well as summaries at the end.  From this set of runs (the output has been rearranged to make it easier to read):
 
<pre>
2011-08-26 21:25:45 INFO testautoflag Summary of Flag Counts
2011-08-26 21:25:45 INFO testautoflag Field[1]:J1925+2106  Spw[0]:1000.00MHz-1126.00MHz --> Flagged 78.29%.
2011-08-26 21:25:45 INFO testautoflag Field[2]:G55.7+3.4  Spw[0]:1000.00MHz-1126.00MHz --> Flagged 83.91%.
2011-08-26 21:25:45 INFO testautoflag Field[3]:0542+498=3C147  Spw[0]:1000.00MHz-1126.00MHz --> Flagged 51.10%.
 
2011-08-26 21:25:45 INFO testautoflag Field[1]:J1925+2106  Spw[1]:1128.00MHz-1254.00MHz --> Flagged 99.49%.
2011-08-26 21:25:45 INFO testautoflag Field[2]:G55.7+3.4  Spw[1]:1128.00MHz-1254.00MHz --> Flagged 99.48%.
2011-08-26 21:25:45 INFO testautoflag Field[3]:0542+498=3C147  Spw[1]:1128.00MHz-1254.00MHz --> Flagged 87.58%.
 
2011-08-26 21:28:17 INFO testautoflag Field[1]:J1925+2106  Spw[2]:1256.00MHz-1382.00MHz --> Flagged 58.28%.
2011-08-26 21:28:17 INFO testautoflag Field[2]:G55.7+3.4  Spw[2]:1256.00MHz-1382.00MHz --> Flagged 60.99%.
2011-08-26 21:28:17 INFO testautoflag Field[3]:0542+498=3C147  Spw[2]:1256.00MHz-1382.00MHz --> Flagged 49.12%.
 
2011-08-26 21:34:57 INFO testautoflag Field[1]:J1925+2106  Spw[3]:1384.00MHz-1510.00MHz --> Flagged 35.99%.
2011-08-26 21:34:57 INFO testautoflag Field[2]:G55.7+3.4  Spw[3]:1384.00MHz-1510.00MHz --> Flagged 37.49%.
2011-08-26 21:34:57 INFO testautoflag Field[3]:0542+498=3C147  Spw[3]:1384.00MHz-1510.00MHz --> Flagged 33.37%.
 
2011-08-26 21:34:57 INFO testautoflag Field[1]:J1925+2106  Spw[5]:1648.00MHz-1774.00MHz --> Flagged 45.38%.
2011-08-26 21:34:57 INFO testautoflag Field[2]:G55.7+3.4  Spw[5]:1648.00MHz-1774.00MHz --> Flagged 47.03%.
2011-08-26 21:34:57 INFO testautoflag Field[3]:0542+498=3C147  Spw[5]:1648.00MHz-1774.00MHz --> Flagged 37.64%.
 
2011-08-26 21:37:26 INFO testautoflag Field[1]:J1925+2106  Spw[6]:1776.00MHz-1902.00MHz --> Flagged 33.12%.
2011-08-26 21:37:26 INFO testautoflag Field[2]:G55.7+3.4 Spw[6]:1776.00MHz-1902.00MHz --> Flagged 34.13%.
2011-08-26 21:37:26 INFO testautoflag Field[3]:0542+498=3C147  Spw[6]:1776.00MHz-1902.00MHz --> Flagged 30.61%.
 
2011-08-26 21:34:57 INFO testautoflag Field[1]:J1925+2106  Spw[7]:1904.00MHz-2030.00MHz --> Flagged 61.48%.
2011-08-26 21:34:57 INFO testautoflag Field[2]:G55.7+3.4 Spw[7]:1904.00MHz-2030.00MHz --> Flagged 63.38%.
2011-08-26 21:34:57 INFO testautoflag Field[3]:0542+498=3C147  Spw[7]:1904.00MHz-2030.00MHz --> Flagged 63.76%.
</pre>
 
The vast majority of spectral windows 0 and 1 have been flagged, so we will make the executive decision at this point to completely flag these data:
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag', spw='0~1')
</source>
 
=== Evaluating results & further manual flagging ===
 
Now that the automatic RFI excision is complete, have a look at the data with {{plotms}} and evaluate the results:
 
[[Image:plotMS4.png|200px|thumb|right|plotms display of autoflagged data]]
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='30,75,120,165,190,235,303',
      antenna='ea24', xaxis='freq', yaxis='amp', iteraxis='scan',
      correlation='rr,ll', spw='2~3,5~7', coloraxis='spw')
</source>
 
Looking at these plots, it's clear that SPW 7 is still dominated by RFI in most cases.  Manually flag these data:
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag', spw='7')
</source>
 
Another instructive way to view the data is by baseline and <i>uv</i>-distance.  Note that we're plotting all baselines in these plots, rather than just baselines to ea24.
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='30,75,120,165,190,235,303',
      xaxis='baseline', yaxis='amp', iteraxis='spw',
      correlation='rr,ll', spw='2~3,5~7', coloraxis='antenna1')
</source>
 
The baseline between ea01 and ea05 should be flagged (note that we specify an explicit spectral window selection; this will help {{flagdata}} run more quickly):
 
<source lang="python">
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag', antenna='ea01&ea05',
        spw='2~3,5~6')
</source>
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='30,75,120,165,190,235,303',
      xaxis='uvdist', yaxis='amp', iteraxis='spw',
      correlation='rr,ll', spw='2~3,5~7', coloraxis='antenna1')
</source>
 
This reveals a few more spectral-window-specific baselines that should be flagged.  This time, we'll use the {{flagcmd}} task, to input a list of flagging commands:
 
<source lang="python">
# In CASA
flagList = ["mode='manualflag' spw='5' antenna='ea02&ea09;ea16&ea19;ea08&ea16;ea02&ea16;ea08&ea22'", \
            "mode='manualflag' spw='2' antenna='ea03&ea15;ea12&ea19;ea19&ea23;ea09&ea16;ea03&ea19;ea07&ea16;ea11&ea16'", \
            "mode='manualflag' spw='2' uvrange='0~100'"]
 
flagcmd(vis='G55.7+3.4_10s.ms', flagmode='cmd', command=flagList)
</source>
 
One final plot of the flagged data using {{plotms}} -- this time, we'll use a slightly different set of scans to be sure we haven't missed any serious RFI:
 
<source lang="python">
# In CASA
plotms(vis='G55.7+3.4_10s.ms', scan='22,48,80,100,130,150,174,200,242,267,306',
      xaxis='freq', yaxis='amp', iteraxis='scan',
      correlation='rr,ll', spw='2~3,5~7', coloraxis='spw')
</source>
 
Clearly, there is still some residual RFI left here and there -- however, for the purposes of this tutorial, we will accept the current state of the flags and move on.
 
== Calibrating data ==
 
=== Clearing previous calibration ===
 
=== Setting flux scale ===
 
=== Bandpass calibration ===
 
=== Gain calibration ===
 
=== Flux scaling gain solutions ===
 
=== Applying calibration ===
 
=== Plotting calibrated data ===
 
== Imaging ==
 
=== Splitting out target data ===
 
=== Multi-scale clean ===
 
=== Multi-scale, multi-frequency synthesis ===
 
=== Multi-scale, wide-field clean ===
 
=== Multi-scale, multi-frequency, wide-field clean ===

Latest revision as of 13:57, 12 November 2015