EVLA Wide-Band Wide-Field Imaging: G55.7 3.4: Difference between revisions
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| Line 799: | Line 799: | ||
timefit='poly', maxnpieces=1, ntime=200, | timefit='poly', maxnpieces=1, ntime=200, | ||
datadisplay=True, timecutoff=4, freqcutoff=3, | 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: | |||
t<source lang="python"> | |||
# In CASA | |||
estautoflag(vis='G55.7+3.4_10s.ms', field='2', 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', field='2', 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', field='2', 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', field='2', 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) | extendpols=True, preflagzeros=False, flagnearfreq=True) | ||
</source> | </source> | ||
Revision as of 20:38, 26 August 2011
Overview
This CASA Guide describes the imaging of the supernova remnant 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 [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 casapy-stable 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:
# In CASA
listobs('G55.7+3.4_10s.ms')
The logger output will look like this:
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
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:
# In CASA
plotants('G55.7+3.4_10s.ms')
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:
# 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')
The coloraxis parameter indicates that a different color will be assigned to each spectral window, and the iteraxis 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.
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:
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.
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 [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]\displaystyle{ u }[/math] and [math]\displaystyle{ v }[/math]. If an antenna's position is incorrect, then [math]\displaystyle{ u }[/math] and [math]\displaystyle{ 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]\displaystyle{ b_{ij} }[/math] term from the equation above, but since they are known a priori it makes sense to incorporate them now.)
Any corrections can be ascertained from the 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:
# 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])
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:
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag',
antenna='ea06,ea17,ea20,ea26')
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:
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='shadow',
flagbackup=False)
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:
# 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'])
- 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 inside 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, testautoflag, currently available in CASA. 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.
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:
# In CASA
hanningsmooth(vis='G55.7+3.4_10s.ms', datacolumn='data')
This task will take a little while to run (likely around 10 minutes).
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:
# In CASA
clearcal(vis='G55.7+3.4_10s.ms')
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.
# 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')
- 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:
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
Using these channel ranges, we run gaincal to perform phase-only solutions over the course of the observation:
# 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')
- 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 within 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.
We can inspect the resulting calibration table with plotcal:
# In CASA
plotcal(caltable='G55.7+3.4_10s.initPh', xaxis='time', yaxis='phase',
iteration='antenna', spw='0', plotrange=[-1,-1,-180,180])
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:
# 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])
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:
# 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'])
- 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 nearest 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 minblperant and minsnr.
We may plot the bandpasses with plotcal; first looking at the amplitudes:
# In CASA
plotcal(caltable='G55.7+3.4_10s.initBP', xaxis='freq', yaxis='amp',
iteration='antenna', subplot=331)
- subplot=331: displays 3x3 plots per screen
Also, we can look at the phase solutions:
# In CASA
plotcal(caltable='G55.7+3.4_10s.initBP', xaxis='freq', yaxis='phase',
iteration='antenna', subplot=331)
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 testautoflag, 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:
# In CASA
flagdata(vis='G55.7+3.4_10s.ms', mode='manualflag', spw='0:0~8,1:41~63,4')
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:
# 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)
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:
# 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')
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 testautoflag. Note that there are many parameters which may be tweaked:
# 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(...)
Following are a set of testautoflag 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 testautoflag works quite well with narrow-band RFI but struggles with wide-band RFI or spectral windows where many channels have already been flagged.
# 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)
Once you are happy (or as much so as possible), run testautoflag with "writeflags=True" to write the flags to the data:
t
# In CASA
estautoflag(vis='G55.7+3.4_10s.ms', field='2', 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', field='2', 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', field='2', 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', field='2', 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)
Evaluating results & manual flagging
Flagging lowest edge of SPW 0 ...
