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]]
 
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== 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.
 
== 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).  Unfortunately, it 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 central 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:
 
<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='0~7:29~33', 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='0~7:29~33': each spectral window is 64 channels, we request only the central five channels.  If there is a large delay to a particular antenna, trying to solve over a large number of channels will fail due to the change in phase with respect to frequency.
* 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.
 
<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>
 
<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=[antPos, initPh], interp=['', 'nearest'])
</source>
 
<source lang="python">
# In CASA
plotcal(caltable='G55.7+3.4_10s.initBP', xaxis='freq', yaxis='amp', iteration='antenna')
</source>
 
 
=== Running testautoflag ===
 
=== Evaluating results & manual flagging ===
 
Flagging lowest edge of SPW 0 ...
 
== 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