EVLA 6cmWideband Tutorial SN2010FZ: Difference between revisions

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To start your tutorial, depending on which dataset you start with, proceed to:
To start your tutorial, depending on which dataset you start with, proceed to:
* <em>To start with the raw SDM data:</em> Start with the section below titled "Importing your EVLA data from SDM". This is where you would start if you were reducing data from the archive.
* <em>To start with the raw SDM data:</em> Start with the section below titled "Importing your EVLA data from SDM". This is where you would start if you were reducing data from the archive.
* <em>To start with the raw filled MS:</em> Start with the section below titled "Application of Online Flags and averaging your MS".
* <em>To start with the raw filled MS:</em> Start with the section below titled "Application of Online Flags and Averaging your MS".
* <em>To start with the flagged and averaged MS:</em> Start with the section below titled "Examining and Flagging your averaged MS".
* <em>To start with the flagged and averaged MS:</em> Start with the section below titled "Examining and Flagging your Averaged MS".


== Importing your EVLA data from SDM ==
== Importing your EVLA data from SDM ==
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listsdm('/lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065')
listsdm('/lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065')
</source>
</source>
In the logger you should see:
<pre>
================================================================================
  SDM File: /lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065
================================================================================
  Observer: Dr. Alicia M. Soderberg
  Facility: EVLA, D-configuration
      Observed from 2010/07/11/21:28:28.41 to 2010/07/11/22:28:17.73 (UTC)
      Total integration time = 3589.32 seconds (1.00 hours)
Scan listing:
  Timerange (UTC)          Scan FldID  FieldName      SpwIDs        Intent(s)
  21:28:28.41 - 21:29:27.40    1    0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:29:27.40 - 21:30:57.16    2    0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:30:57.16 - 21:32:26.91    3    0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:32:26.91 - 21:33:56.67    4    0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:33:56.67 - 21:34:56.50    5    0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:34:56.50 - 21:35:56.34    6    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:35:56.34 - 21:37:26.09    7    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:37:26.09 - 21:38:25.93    8    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:38:25.93 - 21:39:55.68    9    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:39:55.68 - 21:41:25.44  10    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:41:25.44 - 21:42:55.19  11    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:42:55.19 - 21:44:24.94  12    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:44:24.94 - 21:45:54.70  13    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:45:54.70 - 21:47:24.45  14    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:47:24.45 - 21:47:54.37  15    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:47:54.37 - 21:49:24.12  16    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:49:24.12 - 21:50:53.88  17    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:50:53.88 - 21:52:23.63  18    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:52:23.63 - 21:53:53.39  19    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:53:53.39 - 21:55:23.14  20    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:55:23.14 - 21:56:52.89  21    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:56:52.89 - 21:58:22.65  22    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:58:22.65 - 21:58:52.57  23    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:58:52.57 - 22:00:22.32  24    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  22:00:22.32 - 22:01:52.07  25    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:01:52.07 - 22:03:21.83  26    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:03:21.83 - 22:04:51.58  27    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:04:51.58 - 22:06:21.34  28    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:06:21.34 - 22:07:51.09  29    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:07:51.09 - 22:09:20.85  30    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:09:20.85 - 22:09:50.76  31    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:09:50.76 - 22:11:20.52  32    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  22:11:20.52 - 22:12:50.27  33    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:12:50.27 - 22:14:20.02  34    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:14:20.02 - 22:15:49.78  35    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:15:49.78 - 22:17:19.53  36    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:17:19.53 - 22:18:49.29  37    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:18:49.29 - 22:20:19.04  38    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:20:19.04 - 22:20:48.96  39    1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:20:48.96 - 22:22:18.71  40    0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  22:22:18.71 - 22:23:48.47  41    2  3C286          [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
  22:23:48.47 - 22:25:18.22  42    2  3C286          [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
  22:25:18.22 - 22:26:47.98  43    2  3C286          [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
  22:26:47.98 - 22:28:17.73  44    2  3C286          [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
Spectral window information:
  SpwID  #Chans  Ch0(MHz)  ChWidth(kHz) TotBW(MHz)  Baseband
  0      64      7686.0    2000.0      128.0      BB_4   
  1      64      7836.0    2000.0      128.0      BB_8   
  2      64      4488.0    2000.0      128.0      BB_4   
  3      64      4616.0    2000.0      128.0      BB_4   
  4      64      4744.0    2000.0      128.0      BB_4   
  5      64      4872.0    2000.0      128.0      BB_4   
  6      64      5000.0    2000.0      128.0      BB_4   
  7      64      5128.0    2000.0      128.0      BB_4   
  8      64      5256.0    2000.0      128.0      BB_4   
  9      64      5384.0    2000.0      128.0      BB_4   
  10    64      6488.0    2000.0      128.0      BB_8   
  11    64      6616.0    2000.0      128.0      BB_8   
  12    64      6744.0    2000.0      128.0      BB_8   
  13    64      6872.0    2000.0      128.0      BB_8   
  14    64      7000.0    2000.0      128.0      BB_8   
  15    64      7128.0    2000.0      128.0      BB_8   
  16    64      7256.0    2000.0      128.0      BB_8   
  17    64      7384.0    2000.0      128.0      BB_8   
Field information:
  FldID  Code  Name            RA            Dec            SrcID
  0      D      J0925+0019      09:25:07.82  +000.19.13.933  0   
  1      NONE  SN2010FZ        09:42:04.77  +000.19.51.000  1   
  2      K      3C286            13:31:08.29  +030.30.32.959  2   
Antennas (27):
  ID    Name  Station  Diam.(m)  Lat.          Long.
  0    ea01  W09      25.0      +000.00.00.0  +000.00.00.0
  1    ea02  E02      25.0      +033.53.51.0  -107.37.25.2
  2    ea03  E09      25.0      +033.54.01.1  -107.37.04.4
  3    ea04  W01      25.0      +033.53.53.6  -107.36.45.1
  4    ea05  W08      25.0      +033.54.00.5  -107.37.05.9
  5    ea06  N06      25.0      +033.53.53.0  -107.37.21.6
  6    ea08  N01      25.0      +033.54.10.3  -107.37.06.9
  7    ea09  E06      25.0      +033.54.01.8  -107.37.06.0
  8    ea10  N03      25.0      +033.53.57.7  -107.36.55.6
  9    ea11  E04      25.0      +033.54.04.8  -107.37.06.3
  10    ea12  E08      25.0      +033.53.59.7  -107.37.00.8
  11    ea13  N07      25.0      +033.53.55.1  -107.36.48.9
  12    ea14  E05      25.0      +033.54.12.9  -107.37.07.2
  13    ea15  W06      25.0      +033.53.58.8  -107.36.58.4
  14    ea16  W02      25.0      +033.53.56.4  -107.37.15.6
  15    ea17  W07      25.0      +033.54.00.9  -107.37.07.5
  16    ea18  N09      25.0      +033.53.54.8  -107.37.18.4
  17    ea19  W04      25.0      +033.54.19.0  -107.37.07.8
  18    ea20  N05      25.0      +033.53.59.1  -107.37.10.8
  19    ea21  E01      25.0      +033.54.08.0  -107.37.06.7
  20    ea22  N04      25.0      +033.53.59.2  -107.37.05.7
  21    ea23  E07      25.0      +033.54.06.1  -107.37.06.5
  22    ea24  W05      25.0      +033.53.56.5  -107.36.52.4
  23    ea25  N02      25.0      +033.53.57.8  -107.37.13.0
  24    ea26  W03      25.0      +033.54.03.5  -107.37.06.2
  25    ea27  E03      25.0      +033.54.00.1  -107.37.08.9
  26    ea28  N08      25.0      +033.54.00.5  -107.37.02.8
</pre>


We use the {{importevla}} task to convert the SDM dataset from the archive to a CASA Measurement Set (MS).
We use the {{importevla}} task to convert the SDM dataset from the archive to a CASA Measurement Set (MS).
Line 46: Line 161:


For the purposes of this exercise, in order to save time and disk space, we have turned off the automatic creation of flag column backups by setting <pre>flagbackup=False</pre>.  If we make a mistake and need to recover flags then we will have to rerun all previous commands.  We recommend that for real data processing that you leave the default value <tt>flagbackup=True</tt> in this and subsequent tasks.
For the purposes of this exercise, in order to save time and disk space, we have turned off the automatic creation of flag column backups by setting <pre>flagbackup=False</pre>.  If we make a mistake and need to recover flags then we will have to rerun all previous commands.  We recommend that for real data processing that you leave the default value <tt>flagbackup=True</tt> in this and subsequent tasks.
You now have a MS called <tt>SN2010FZ_filled.ms</tt> in your working area.  This should be 37GB like the SDM.
== Application of Online Flags and Averaging your MS ==

Revision as of 16:49, 25 August 2011

Overview

This article describes the calibration and imaging of a single-pointing 6cm EVLA wideband continuum dataset on the galaxy NGC2967 (UGC5180) which was the location of the supernova candidate SN2010FZ. No supernova was detected in this observation, but the galactic continuum emission from this face-on spiral is adequately imaged. The data were taken in RSRO mode, with 1024 MHz of bandwidth in each of two widely spaced basebands (comprised each of 8 128 MHz spectral windows), spanning 4.5 to 7.5 GHz. We will use wideband imaging techniques in this tutorial.

This is a more advanced tutorial, and if you are a relative novice (and particularly for EVLA continuum calibration and imaging), it is strongly recommended that you start with the EVLA Continuum Tutorial 3C391 before tackling this dataset. We will not include basic information on CASA processing in this tutorial.

CASA Versions

This tutorial was written for the CASA Version 3.2.1 (release r15198 26 May 2011).

Obtaining the Data

The scheduling block (SB) processed appears in the EVLA archive under program AS1015 as AS1015_sb1658169_1.55388.89474846065 and was run on 2010-07-11 from 21:28 to 22:28 UT (size 37.74GB).

For the purposes of this tutorial, we have provided the raw SDM data (as would be extracted from the archive) as well as measurement sets created by filling the data (with the importevla task) and upon time-averaging to 10s (after application of the online flags).

To start your tutorial, depending on which dataset you start with, proceed to:

  • To start with the raw SDM data: Start with the section below titled "Importing your EVLA data from SDM". This is where you would start if you were reducing data from the archive.
  • To start with the raw filled MS: Start with the section below titled "Application of Online Flags and Averaging your MS".
  • To start with the flagged and averaged MS: Start with the section below titled "Examining and Flagging your Averaged MS".

Importing your EVLA data from SDM

For the purposes of this tutorial, we assume that the SDM is resident on disk, in this case at the location /lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065. Use the actual location of your data when you carry out the commands.

The listsdm task will print out a summary of the scans, fields, spectral windows, and antennas present in your SDM. 

# In CASA
listsdm('/lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065')

In the logger you should see: 

================================================================================
   SDM File: /lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065
================================================================================
   Observer: Dr. Alicia M. Soderberg
   Facility: EVLA, D-configuration
      Observed from 2010/07/11/21:28:28.41 to 2010/07/11/22:28:17.73 (UTC)
      Total integration time = 3589.32 seconds (1.00 hours)
 
Scan listing:
  Timerange (UTC)           Scan FldID  FieldName       SpwIDs         Intent(s)
  21:28:28.41 - 21:29:27.40    1     0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:29:27.40 - 21:30:57.16    2     0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:30:57.16 - 21:32:26.91    3     0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:32:26.91 - 21:33:56.67    4     0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:33:56.67 - 21:34:56.50    5     0  J0925+0019      [0, 1]  CALIBRATE_PHASE
  21:34:56.50 - 21:35:56.34    6     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:35:56.34 - 21:37:26.09    7     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:37:26.09 - 21:38:25.93    8     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:38:25.93 - 21:39:55.68    9     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:39:55.68 - 21:41:25.44   10     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:41:25.44 - 21:42:55.19   11     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:42:55.19 - 21:44:24.94   12     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:44:24.94 - 21:45:54.70   13     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:45:54.70 - 21:47:24.45   14     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:47:24.45 - 21:47:54.37   15     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:47:54.37 - 21:49:24.12   16     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  21:49:24.12 - 21:50:53.88   17     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:50:53.88 - 21:52:23.63   18     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:52:23.63 - 21:53:53.39   19     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:53:53.39 - 21:55:23.14   20     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:55:23.14 - 21:56:52.89   21     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:56:52.89 - 21:58:22.65   22     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:58:22.65 - 21:58:52.57   23     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  21:58:52.57 - 22:00:22.32   24     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  22:00:22.32 - 22:01:52.07   25     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:01:52.07 - 22:03:21.83   26     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:03:21.83 - 22:04:51.58   27     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:04:51.58 - 22:06:21.34   28     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:06:21.34 - 22:07:51.09   29     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:07:51.09 - 22:09:20.85   30     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:09:20.85 - 22:09:50.76   31     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:09:50.76 - 22:11:20.52   32     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  22:11:20.52 - 22:12:50.27   33     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:12:50.27 - 22:14:20.02   34     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:14:20.02 - 22:15:49.78   35     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:15:49.78 - 22:17:19.53   36     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:17:19.53 - 22:18:49.29   37     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:18:49.29 - 22:20:19.04   38     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:20:19.04 - 22:20:48.96   39     1  SN2010FZ        [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  OBSERVE_TARGET
  22:20:48.96 - 22:22:18.71   40     0  J0925+0019      [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_PHASE
  22:22:18.71 - 22:23:48.47   41     2  3C286           [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
  22:23:48.47 - 22:25:18.22   42     2  3C286           [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
  22:25:18.22 - 22:26:47.98   43     2  3C286           [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
  22:26:47.98 - 22:28:17.73   44     2  3C286           [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]  CALIBRATE_BANDPASS CALIBRATE_AMPLI
 
Spectral window information:
  SpwID  #Chans  Ch0(MHz)  ChWidth(kHz) TotBW(MHz)  Baseband
  0      64      7686.0    2000.0       128.0       BB_4    
  1      64      7836.0    2000.0       128.0       BB_8    
  2      64      4488.0    2000.0       128.0       BB_4    
  3      64      4616.0    2000.0       128.0       BB_4    
  4      64      4744.0    2000.0       128.0       BB_4    
  5      64      4872.0    2000.0       128.0       BB_4    
  6      64      5000.0    2000.0       128.0       BB_4    
  7      64      5128.0    2000.0       128.0       BB_4    
  8      64      5256.0    2000.0       128.0       BB_4    
  9      64      5384.0    2000.0       128.0       BB_4    
  10     64      6488.0    2000.0       128.0       BB_8    
  11     64      6616.0    2000.0       128.0       BB_8    
  12     64      6744.0    2000.0       128.0       BB_8    
  13     64      6872.0    2000.0       128.0       BB_8    
  14     64      7000.0    2000.0       128.0       BB_8    
  15     64      7128.0    2000.0       128.0       BB_8    
  16     64      7256.0    2000.0       128.0       BB_8    
  17     64      7384.0    2000.0       128.0       BB_8    
 
Field information:
  FldID  Code   Name             RA            Dec             SrcID
  0      D      J0925+0019       09:25:07.82   +000.19.13.933  0    
  1      NONE   SN2010FZ         09:42:04.77   +000.19.51.000  1    
  2      K      3C286            13:31:08.29   +030.30.32.959  2    
 
Antennas (27):
  ID    Name   Station   Diam.(m)  Lat.          Long.
  0     ea01   W09       25.0      +000.00.00.0  +000.00.00.0 
  1     ea02   E02       25.0      +033.53.51.0  -107.37.25.2 
  2     ea03   E09       25.0      +033.54.01.1  -107.37.04.4 
  3     ea04   W01       25.0      +033.53.53.6  -107.36.45.1 
  4     ea05   W08       25.0      +033.54.00.5  -107.37.05.9 
  5     ea06   N06       25.0      +033.53.53.0  -107.37.21.6 
  6     ea08   N01       25.0      +033.54.10.3  -107.37.06.9 
  7     ea09   E06       25.0      +033.54.01.8  -107.37.06.0 
  8     ea10   N03       25.0      +033.53.57.7  -107.36.55.6 
  9     ea11   E04       25.0      +033.54.04.8  -107.37.06.3 
  10    ea12   E08       25.0      +033.53.59.7  -107.37.00.8 
  11    ea13   N07       25.0      +033.53.55.1  -107.36.48.9 
  12    ea14   E05       25.0      +033.54.12.9  -107.37.07.2 
  13    ea15   W06       25.0      +033.53.58.8  -107.36.58.4 
  14    ea16   W02       25.0      +033.53.56.4  -107.37.15.6 
  15    ea17   W07       25.0      +033.54.00.9  -107.37.07.5 
  16    ea18   N09       25.0      +033.53.54.8  -107.37.18.4 
  17    ea19   W04       25.0      +033.54.19.0  -107.37.07.8 
  18    ea20   N05       25.0      +033.53.59.1  -107.37.10.8 
  19    ea21   E01       25.0      +033.54.08.0  -107.37.06.7 
  20    ea22   N04       25.0      +033.53.59.2  -107.37.05.7 
  21    ea23   E07       25.0      +033.54.06.1  -107.37.06.5 
  22    ea24   W05       25.0      +033.53.56.5  -107.36.52.4 
  23    ea25   N02       25.0      +033.53.57.8  -107.37.13.0 
  24    ea26   W03       25.0      +033.54.03.5  -107.37.06.2 
  25    ea27   E03       25.0      +033.54.00.1  -107.37.08.9 
  26    ea28   N08       25.0      +033.54.00.5  -107.37.02.8

We use the importevla task to convert the SDM dataset from the archive to a CASA Measurement Set (MS). 

# In CASA
importevla(asdm='/lustre/smyers/AS1015/AS1015_sb1658169_1.55388.89474846065', \
           vis='SN2010FZ_filled.ms',online=True,flagzero=True, \
           shadow=True,applyflags=False,tbuff=1.5,flagbackup=False)

Here we had the task create (but not apply) the online flagging commands, plus flags for zero-clipping and shadowing. The timeranges for the online flags were extended by 1.5sec (the integration time was 1sec) to account for some timing mismatches present in the EVLA data at this time. These online flags indicated times where the antennas were not on source (e.g. slewing) or had other detectable faults. The created flagging commands will be stored in the FLAG_CMD MS table and can be applied later. Note that if you set applyflags=True here then after filling the task will go ahead and apply the flags for you.

For the purposes of this exercise, in order to save time and disk space, we have turned off the automatic creation of flag column backups by setting 

flagbackup=False

. If we make a mistake and need to recover flags then we will have to rerun all previous commands. We recommend that for real data processing that you leave the default value flagbackup=True in this and subsequent tasks.

You now have a MS called SN2010FZ_filled.ms in your working area. This should be 37GB like the SDM.

Application of Online Flags and Averaging your MS

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