Table of Contents
This tutorial is based on CASA guides data set on the protoplanetary disk HL Tau. You can find the description of the data set here:
https://casaguides.nrao.edu/index.php/ALMA2014_LBC_SVDATA#HL_Tau_-_Protoplanetary_Disk
We will only consider band 6 continuum imaging during this tutorial session. The full script to reduce the data HLTau_Band6_Cont_Imaging.py is given on the above page. Because of time constraints, we will only use parts of it, and you will skip over some steps described in that file. The data have already been calibrated, and in this session we will only make an image of the already-calibrated data.
Setting up CASA
CASA has already been installed on the system, but you need to set PATH to find casa binaries.
export PATH=/opt/casa/bin:$PATH
Generate a working directory for your project
mkdir alma cd alma
Get the data
Normally you would copy the data from the archive but to save time you can just go to your working directory and
cp -rf /course_data/alma/HLTau/HLTau_Band6_CalibratedData/HLTau_B6cont.calavg .
Note the period at the end and no slash at the end of the filename.
Starting CASA
At this point you should be working from the directory that contains the data.
# In bash % ls HLTau_B6cont.calavg %
And now you can start CASA:
# In bash % casa
Some CASA basics
Some unix commands work directly in CASA, for example:
# In CASA ls pwd
A starting point in all data reduction with CASA is to examine the header information and data structure for the data set. You can do this with the “listobs” task in CASA. For tasks such as this one, we can either set the parameters ahead of time and instruct CASA to “go” when we're ready, or we can execute the task with a single command. For example, we can do:
# In CASA inp listobs vis='HLTau_B6cont.calavg' go
or we can give the command, which also saves the output to a file for later inspection:
# In CASA listobs(vis='HLTau_B6cont.calavg',listfile='HLTau_B6cont.calavg.listobs')
The output for listobs is printed to the CASA Message window, or saved to a file if you used the latter command.
You can get help on any CASA task:
# In CASA help listobs
The listobs output is as follows:
================================================================================
MeasurementSet Name: /home/thovatta/alma/HLTau2/HLTau_B6cont.calavg MS Version 2
================================================================================
Observer: violette Project: uid://A002/X8d0549/X5f
Observation: ALMA
Telescope Observation Date Observer Project
ALMA [ 4.92085e+09, 4.92085e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92093e+09, 4.92093e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92111e+09, 4.92112e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92112e+09, 4.92112e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92127e+09, 4.92127e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92127e+09, 4.92128e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92128e+09, 4.92128e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92128e+09, 4.92129e+09]violette uid://A002/X8d0549/X5f
ALMA [ 4.92146e+09, 4.92146e+09]violette uid://A002/X8d0549/X5f
Data records: 21375656 Total elapsed time = 610615 seconds
Observed from 24-Oct-2014/06:58:24.0 to 31-Oct-2014/08:35:19.2 (UTC)
ObservationID = 0 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
24-Oct-2014/06:58:24.0 - 06:58:40.1 8 0 HL_Tau 43500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
06:59:14.4 - 07:00:24.0 9 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:00:43.6 - 07:01:53.2 11 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:02:12.9 - 07:03:22.5 13 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:03:42.2 - 07:04:51.8 15 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:05:11.5 - 07:06:21.1 17 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:06:40.8 - 07:07:50.4 19 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:09:10.8 - 07:09:26.8 22 0 HL_Tau 43500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:09:57.4 - 07:11:07.0 23 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:11:26.7 - 07:12:36.3 25 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:12:56.0 - 07:14:05.6 27 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:14:25.2 - 07:15:34.8 29 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:15:54.5 - 07:17:04.1 31 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:17:23.8 - 07:18:33.4 33 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:19:58.8 - 07:20:14.8 36 0 HL_Tau 43500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:20:45.6 - 07:21:55.2 37 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:22:14.9 - 07:23:24.5 39 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:23:44.2 - 07:24:53.8 41 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:25:13.5 - 07:26:23.1 43 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:26:42.8 - 07:27:52.4 45 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:28:12.0 - 07:29:21.6 47 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:30:41.5 - 07:30:57.5 50 0 HL_Tau 43500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:31:29.8 - 07:32:39.4 51 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:32:59.0 - 07:34:08.6 53 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:34:28.3 - 07:35:37.9 55 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:35:57.6 - 07:37:07.2 57 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:37:26.9 - 07:38:36.5 59 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:38:56.2 - 07:40:05.8 61 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:41:26.7 - 07:41:42.7 64 0 HL_Tau 43500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:42:07.4 - 07:43:17.0 65 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:43:36.7 - 07:44:46.3 67 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:45:06.0 - 07:46:15.6 69 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:46:35.3 - 07:47:44.9 71 0 HL_Tau 55680 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 1 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
25-Oct-2014/05:03:57.0 - 05:04:13.0 72 0 HL_Tau 49600 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:04:46.9 - 05:05:56.5 73 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:06:16.2 - 05:07:25.8 75 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:07:45.5 - 05:08:55.1 77 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:09:14.8 - 05:10:24.4 79 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:10:44.1 - 05:11:53.7 81 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:12:13.3 - 05:13:22.9 83 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:14:43.1 - 05:14:59.1 86 0 HL_Tau 49600 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:15:34.6 - 05:16:44.2 87 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:17:03.8 - 05:18:13.4 89 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:18:33.1 - 05:19:42.7 91 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:20:02.4 - 05:21:12.0 93 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:21:31.7 - 05:22:41.3 95 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:23:01.0 - 05:24:10.6 97 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:25:41.8 - 05:25:57.8 100 0 HL_Tau 49600 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:26:32.2 - 05:27:41.8 101 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:28:01.5 - 05:29:11.1 103 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:29:30.8 - 05:30:40.4 105 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:31:00.0 - 05:32:09.6 107 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:32:29.3 - 05:33:38.9 109 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:33:58.6 - 05:35:08.2 111 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:36:31.6 - 05:36:47.6 114 0 HL_Tau 49600 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:37:22.0 - 05:38:31.6 115 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:38:51.3 - 05:40:00.9 117 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:40:20.6 - 05:41:30.2 119 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:41:49.9 - 05:42:59.5 121 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:43:19.2 - 05:44:28.8 123 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:44:48.4 - 05:45:58.0 125 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:47:21.6 - 05:47:37.6 128 0 HL_Tau 49600 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:48:08.7 - 05:49:18.3 129 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:49:38.0 - 05:50:47.6 131 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:51:07.2 - 05:52:16.8 133 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:52:36.5 - 05:53:46.1 135 0 HL_Tau 63488 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 2 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
27-Oct-2014/08:07:12.3 - 08:07:28.4 136 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:08:01.2 - 08:09:10.8 137 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:09:30.4 - 08:10:40.0 139 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:10:59.7 - 08:12:09.3 141 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:12:29.0 - 08:13:38.6 143 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:13:58.3 - 08:15:07.9 145 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:15:27.6 - 08:16:37.2 147 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:17:57.5 - 08:18:13.5 150 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:18:46.8 - 08:19:56.4 151 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:20:16.1 - 08:21:25.7 153 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:21:45.4 - 08:22:55.0 155 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:23:14.7 - 08:24:24.3 157 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:24:44.0 - 08:25:53.6 159 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:26:13.2 - 08:27:22.8 161 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:28:47.9 - 08:29:03.9 164 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:29:40.6 - 08:30:50.2 165 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:31:09.9 - 08:32:19.5 167 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:32:39.2 - 08:33:48.8 169 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:34:08.4 - 08:35:18.0 171 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:35:37.7 - 08:36:47.3 173 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:37:07.0 - 08:38:16.6 175 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:39:38.9 - 08:39:55.0 178 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:40:39.2 - 08:41:48.8 179 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:42:08.5 - 08:43:18.1 181 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:43:37.8 - 08:44:47.4 183 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:45:07.1 - 08:46:16.7 185 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:46:36.3 - 08:47:45.9 187 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:48:05.6 - 08:49:15.2 189 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:50:33.0 - 08:50:49.1 192 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:51:15.9 - 08:52:25.5 193 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:52:45.2 - 08:53:54.8 195 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:54:14.5 - 08:55:24.1 197 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:55:43.8 - 08:56:53.4 199 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 3 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
27-Oct-2014/09:12:25.6 - 09:12:41.7 200 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
09:13:13.6 - 09:14:23.2 201 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:14:42.9 - 09:15:52.5 203 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:16:12.1 - 09:17:21.7 205 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:17:41.4 - 09:18:51.0 207 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:19:10.7 - 09:20:20.3 209 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:20:40.0 - 09:21:49.6 211 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:23:09.7 - 09:23:25.7 214 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
09:23:57.5 - 09:25:07.1 215 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:25:26.7 - 09:26:36.3 217 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:26:56.0 - 09:28:05.6 219 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:28:25.3 - 09:29:34.9 221 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:29:54.6 - 09:31:04.2 223 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:31:23.9 - 09:32:33.5 225 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:33:58.6 - 09:34:14.6 228 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
09:34:47.6 - 09:35:57.2 229 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:36:16.8 - 09:37:26.4 231 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:37:46.1 - 09:38:55.7 233 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:39:15.4 - 09:40:25.0 235 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:40:44.7 - 09:41:54.3 237 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:42:14.0 - 09:43:23.6 239 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:44:42.3 - 09:44:58.4 242 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
09:45:30.2 - 09:46:39.8 243 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:46:59.5 - 09:48:09.1 245 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:48:28.8 - 09:49:38.4 247 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:49:58.0 - 09:51:07.6 249 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:51:27.3 - 09:52:36.9 251 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:52:56.6 - 09:54:06.2 253 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:55:26.3 - 09:55:42.3 256 0 HL_Tau 46500 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
09:56:07.2 - 09:57:16.8 257 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:57:36.4 - 09:58:46.0 259 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
09:59:05.7 - 10:00:15.3 261 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
10:00:35.0 - 10:01:44.6 263 0 HL_Tau 59520 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 4 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
29-Oct-2014/03:56:19.8 - 03:56:35.8 264 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
03:57:11.6 - 03:58:21.2 265 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
03:58:40.9 - 03:59:50.5 267 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:00:10.2 - 04:01:19.8 269 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:01:39.5 - 04:02:49.1 271 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:03:08.7 - 04:04:18.3 273 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:04:38.0 - 04:05:47.6 275 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:07:12.6 - 04:07:28.6 278 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
04:08:04.5 - 04:09:14.1 279 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:09:33.7 - 04:10:43.3 281 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:11:03.0 - 04:12:12.6 283 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:12:32.3 - 04:13:41.9 285 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:14:01.6 - 04:15:11.2 287 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:15:30.9 - 04:16:40.5 289 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:18:15.3 - 04:18:31.3 292 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
04:19:08.5 - 04:20:18.1 293 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:20:37.8 - 04:21:47.4 295 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:22:07.1 - 04:23:16.7 297 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:23:36.3 - 04:24:45.9 299 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:25:05.6 - 04:26:15.2 301 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:26:34.9 - 04:27:44.5 303 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:29:07.3 - 04:29:23.4 306 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
04:30:07.5 - 04:31:17.1 307 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:31:36.8 - 04:32:46.4 309 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:33:06.0 - 04:34:15.6 311 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:34:35.3 - 04:35:44.9 313 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:36:04.6 - 04:37:14.2 315 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:37:33.9 - 04:38:43.5 317 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:40:09.7 - 04:40:25.7 320 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
04:41:09.4 - 04:42:19.0 321 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:42:38.7 - 04:43:48.3 323 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:44:08.0 - 04:45:17.6 325 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
04:45:37.2 - 04:46:46.8 327 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 5 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
29-Oct-2014/05:03:21.2 - 05:03:37.2 328 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:04:12.3 - 05:05:21.9 329 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:05:41.6 - 05:06:51.2 331 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:07:10.9 - 05:08:20.5 333 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:08:40.2 - 05:09:49.8 335 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:10:09.5 - 05:11:19.1 337 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:11:38.7 - 05:12:48.3 339 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:14:10.0 - 05:14:26.0 342 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:15:01.2 - 05:16:10.8 343 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:16:30.5 - 05:17:40.1 345 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:17:59.8 - 05:19:09.4 347 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:19:29.0 - 05:20:38.6 349 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:20:58.3 - 05:22:07.9 351 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:22:27.6 - 05:23:37.2 353 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:25:07.8 - 05:25:23.9 356 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:26:01.4 - 05:27:11.0 357 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:27:30.7 - 05:28:40.3 359 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:29:00.0 - 05:30:09.6 361 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:30:29.3 - 05:31:38.9 363 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:31:58.6 - 05:33:08.2 365 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:33:27.8 - 05:34:37.4 367 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:36:04.4 - 05:36:20.4 370 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:37:04.7 - 05:38:14.3 371 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:38:33.9 - 05:39:43.5 373 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:40:03.2 - 05:41:12.8 375 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:41:32.5 - 05:42:42.1 377 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:43:01.8 - 05:44:11.4 379 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:44:31.1 - 05:45:40.7 381 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:47:03.8 - 05:47:19.8 384 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
05:48:02.8 - 05:49:12.4 385 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:49:32.1 - 05:50:41.7 387 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:51:01.3 - 05:52:10.9 389 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
05:52:30.6 - 05:53:40.2 391 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 6 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
29-Oct-2014/06:12:09.2 - 06:12:25.2 392 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
06:13:00.6 - 06:14:10.2 393 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:14:29.9 - 06:15:39.5 395 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:15:59.1 - 06:17:08.7 397 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:17:28.4 - 06:18:38.0 399 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:18:57.7 - 06:20:07.3 401 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:20:27.0 - 06:21:36.6 403 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:23:03.2 - 06:23:19.2 406 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
06:23:55.2 - 06:25:04.8 407 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:25:24.4 - 06:26:34.0 409 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:26:53.7 - 06:28:03.3 411 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:28:23.0 - 06:29:32.6 413 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:29:52.3 - 06:31:01.9 415 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:31:21.6 - 06:32:31.2 417 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:34:01.5 - 06:34:17.5 420 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
06:34:56.0 - 06:36:05.6 421 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:36:25.3 - 06:37:34.9 423 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:37:54.6 - 06:39:04.2 425 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:39:23.9 - 06:40:33.5 427 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:40:53.1 - 06:42:02.7 429 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:42:22.4 - 06:43:32.0 431 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:44:52.1 - 06:45:08.1 434 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
06:45:51.0 - 06:47:00.6 435 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:47:20.3 - 06:48:29.9 437 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:48:49.5 - 06:49:59.1 439 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:50:18.8 - 06:51:28.4 441 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:51:48.1 - 06:52:57.7 443 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:53:17.4 - 06:54:27.0 445 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:55:48.4 - 06:56:04.4 448 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
06:56:46.5 - 06:57:56.1 449 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:58:15.7 - 06:59:25.3 451 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
06:59:45.0 - 07:00:54.6 453 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:01:14.3 - 07:02:23.9 455 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 7 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
29-Oct-2014/07:19:01.4 - 07:19:17.4 456 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:19:56.1 - 07:21:05.7 457 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:21:25.4 - 07:22:35.0 459 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:22:54.7 - 07:24:04.3 461 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:24:24.0 - 07:25:33.6 463 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:25:53.2 - 07:27:02.8 465 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:27:22.5 - 07:28:32.1 467 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:29:53.7 - 07:30:09.7 470 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:30:45.6 - 07:31:55.2 471 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:32:14.9 - 07:33:24.5 473 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:33:44.2 - 07:34:53.8 475 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:35:13.4 - 07:36:23.0 477 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:36:42.7 - 07:37:52.3 479 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:38:12.0 - 07:39:21.6 481 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:40:53.6 - 07:41:09.6 484 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:41:46.2 - 07:42:55.8 485 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:43:15.5 - 07:44:25.1 487 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:44:44.8 - 07:45:54.4 489 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:46:14.1 - 07:47:23.7 491 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:47:43.3 - 07:48:52.9 493 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:49:12.6 - 07:50:22.2 495 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:51:44.3 - 07:52:00.3 498 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:52:44.8 - 07:53:54.4 499 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:54:14.1 - 07:55:23.7 501 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:55:43.4 - 07:56:53.0 503 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:57:12.7 - 07:58:22.3 505 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:58:42.0 - 07:59:51.6 507 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:00:11.2 - 08:01:20.8 509 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:02:44.8 - 08:03:00.8 512 0 HL_Tau 70300 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:03:42.2 - 08:04:51.8 513 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:05:11.5 - 08:06:21.1 515 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:06:40.8 - 08:07:50.4 517 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:08:10.0 - 08:09:19.6 519 0 HL_Tau 89984 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
ObservationID = 8 ArrayID = 0
Date Timerange (UTC) Scan FldId FieldName nRows SpwIds Average Interval(s) ScanIntent
31-Oct-2014/07:45:41.0 - 07:45:57.0 520 0 HL_Tau 56100 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:46:29.8 - 07:47:39.4 521 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:47:59.1 - 07:49:08.7 523 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:49:28.4 - 07:50:38.0 525 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:50:57.6 - 07:52:07.2 527 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:52:26.9 - 07:53:36.5 529 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:53:56.2 - 07:55:05.8 531 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:56:24.1 - 07:56:40.2 534 0 HL_Tau 56100 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
07:57:12.7 - 07:58:22.3 535 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
07:58:42.0 - 07:59:51.6 537 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:00:11.3 - 08:01:20.9 539 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:01:40.6 - 08:02:50.2 541 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:03:09.8 - 08:04:19.4 543 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:04:39.1 - 08:05:48.7 545 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:07:18.4 - 08:07:34.4 548 0 HL_Tau 56100 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:08:09.4 - 08:09:19.0 549 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:09:38.7 - 08:10:48.3 551 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:11:08.0 - 08:12:17.6 553 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:12:37.2 - 08:13:46.8 555 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:14:06.5 - 08:15:16.1 557 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:15:35.8 - 08:16:45.4 559 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:18:07.1 - 08:18:23.1 562 0 HL_Tau 56100 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:18:57.2 - 08:20:06.8 563 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:20:26.5 - 08:21:36.1 565 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:21:55.8 - 08:23:05.4 567 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:23:25.1 - 08:24:34.7 569 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:24:54.3 - 08:26:03.9 571 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:26:23.6 - 08:27:33.2 573 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:28:54.6 - 08:29:10.6 576 0 HL_Tau 56100 [0,1,2,3] [0.48, 0.48, 0.48, 0.48] [CALIBRATE_ATMOSPHERE#OFF_SOURCE,CALIBRATE_ATMOSPHERE#ON_SOURCE,CALIBRATE_WVR#OFF_SOURCE,CALIBRATE_WVR#ON_SOURCE]
08:29:41.7 - 08:30:51.3 577 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:31:11.0 - 08:32:20.6 579 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:32:40.3 - 08:33:49.9 581 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
08:34:09.6 - 08:35:19.2 583 0 HL_Tau 71808 [0,1,2,3] [2.02, 2.02, 2.02, 2.02] [OBSERVE_TARGET#ON_SOURCE]
(nRows = Total number of rows per scan)
Fields: 1
ID Code Name RA Decl Epoch SrcId nRows
0 none HL_Tau 04:31:38.426317 +18.13.57.04712 J2000 0 21375656
Spectral Windows: (4 unique spectral windows and 1 unique polarization setups)
SpwID Name #Chans Frame Ch0(MHz) ChanWid(kHz) TotBW(kHz) CtrFreq(MHz) BBC Num Corrs
0 ALMA_RB_06#BB_1#SW-01#FULL_RES 4 TOPO 224750.000 -500000.000 2000000.0 224000.0000 1 XX YY
1 ALMA_RB_06#BB_2#SW-01#FULL_RES 4 TOPO 226750.000 -500000.000 2000000.0 226000.0000 2 XX YY
2 ALMA_RB_06#BB_3#SW-01#FULL_RES 4 TOPO 239250.000 500000.000 2000000.0 240000.0000 3 XX YY
3 ALMA_RB_06#BB_4#SW-01#FULL_RES 4 TOPO 241250.000 500000.000 2000000.0 242000.0000 4 XX YY
Sources: 4
ID Name SpwId RestFreq(MHz) SysVel(km/s)
0 HL_Tau 0 90500.0000001 6.49995914224
0 HL_Tau 1 92499.9999999 6.49995914224
0 HL_Tau 2 102500 6.49995914224
0 HL_Tau 3 104500 6.49995914224
Antennas: 42:
ID Name Station Diam. Long. Lat. Offset from array center (m) ITRF Geocentric coordinates (m)
East North Elevation x y z
0 DA41 S301 12.0 m -067.44.16.4 -22.54.54.3 1749.4599 -3372.6825 2.9928 2226265.188012 -5438432.826013 -2484137.884475
1 DA43 S306 12.0 m -067.42.57.7 -22.54.29.7 3989.7227 -2611.9690 -40.3967 2228434.984196 -5437820.963198 -2483420.296547
2 DA45 A127 12.0 m -067.45.46.7 -22.52.47.2 -825.0801 559.0573 25.3807 2224469.602132 -5440842.526829 -2480524.657180
3 DA46 A058 12.0 m -067.45.17.3 -22.53.32.0 12.7405 -827.0334 21.9726 2225039.862258 -5440023.557845 -2481800.314800
4 DA48 W207 12.0 m -067.46.54.2 -22.52.18.9 -2749.4737 1432.3412 -36.4377 2222794.971770 -5441832.073628 -2479696.027361
5 DA49 A029 12.0 m -067.45.18.2 -22.53.25.8 -12.9142 -636.4559 22.1388 2225044.240085 -5440102.025782 -2481624.810489
6 DA50 W204 12.0 m -067.48.05.0 -22.52.27.5 -4767.2354 1166.8507 -158.3330 2220845.310660 -5442395.279535 -2479893.258256
7 DA51 A082 12.0 m -067.45.08.3 -22.53.29.2 269.0425 -740.9546 16.2820 2225287.766621 -5439952.668399 -2481718.801650
8 DA52 A035 12.0 m -067.45.16.6 -22.53.28.1 32.0376 -706.8050 21.7658 2225075.355150 -5440059.363397 -2481689.474585
9 DA54 A122 12.0 m -067.45.55.6 -22.53.04.3 -1079.8566 29.4313 6.2491 2224149.165909 -5440732.002068 -2481005.167269
10 DA55 S309 12.0 m -067.41.34.8 -22.56.32.6 6353.9996 -6412.8842 -270.4968 2229979.707599 -5435358.351979 -2486831.273919
11 DA56 A131 12.0 m -067.44.27.8 -22.54.05.7 1423.9483 -1870.2817 48.1382 2226201.282941 -5439135.837931 -2482771.547522
12 DA61 A075 12.0 m -067.45.17.9 -22.53.21.4 -4.5609 -499.7017 23.0349 2225072.420868 -5440148.861100 -2481499.173197
13 DA62 W206 12.0 m -067.47.03.5 -22.52.20.7 -3014.3991 1376.7056 -48.0773 2222537.462218 -5441902.307677 -2479742.764198
14 DA63 A132 12.0 m -067.45.31.6 -22.52.21.7 -394.3434 1348.5033 31.8471 2224986.729390 -5440969.071242 -2479799.814102
15 DA64 P402 12.0 m -067.43.06.5 -22.52.14.1 3739.3714 1582.6108 -125.6556 2228792.175499 -5439352.850581 -2479522.898032
16 DV01 A072 12.0 m -067.45.12.6 -22.53.24.0 147.1726 -580.5884 18.1845 2225199.253631 -5440058.163980 -2481571.804199
17 DV04 A078 12.0 m -067.45.23.6 -22.53.24.9 -167.1207 -607.5988 25.0151 2224906.767402 -5440173.241009 -2481599.344498
18 DV07 W201 12.0 m -067.49.42.3 -22.53.10.0 -7539.6846 -147.0971 -425.9584 2217992.139897 -5442740.799798 -2480999.714530
19 DV08 A133 12.0 m -067.45.56.9 -22.54.04.8 -1117.1531 -1840.7354 -15.1271 2223831.904971 -5440054.467488 -2482719.710626
20 DV09 A124 12.0 m -067.45.00.0 -22.52.43.7 506.3119 665.4987 16.2642 2225714.456335 -5440369.044214 -2480423.045181
21 DV10 A024 12.0 m -067.45.18.3 -22.53.26.8 -16.3949 -665.3092 21.5551 2225036.566263 -5440092.457828 -2481651.164639
22 DV11 A121 12.0 m -067.44.36.3 -22.53.19.3 1181.3914 -435.7660 -24.4931 2226162.863762 -5439682.291035 -2481421.785915
23 DV12 A113 12.0 m -067.44.48.6 -22.53.38.4 831.0655 -1024.4282 3.2434 2225761.606558 -5439626.687979 -2481974.875764
24 DV14 P405 12.0 m -067.43.02.8 -22.52.00.3 3845.9271 2009.7879 -117.8483 2228956.455951 -5439472.711182 -2479132.339468
25 DV15 A118 12.0 m -067.44.49.2 -22.53.57.1 813.9973 -1603.1937 27.6263 2225669.041705 -5439445.530988 -2482517.527412
26 PM02 T702 12.0 m -067.45.18.6 -22.53.24.1 -23.6229 -582.3066 22.0739 2225042.279603 -5440125.519052 -2481574.899964
27 PM03 T701 12.0 m -067.45.18.8 -22.53.22.2 -29.1266 -522.7878 22.2072 2225045.996172 -5440149.143597 -2481520.119612
28 PM04 T703 12.0 m -067.45.16.2 -22.53.23.9 42.8798 -575.6913 21.7781 2225104.701526 -5440102.473395 -2481568.690479
29 DA42 A081 12.0 m -067.45.23.9 -22.53.32.5 -174.5620 -842.8381 21.0916 2224863.873529 -5440088.016968 -2481814.532056
30 DV13 S303 12.0 m -067.43.18.5 -22.56.18.8 3398.9886 -5986.7372 -240.8770 2227320.143464 -5436657.709930 -2486450.391455
31 DV19 P410 12.0 m -067.43.06.2 -22.50.34.5 3748.2544 4664.2944 -125.3680 2229254.345991 -5440457.339733 -2476683.359155
32 DA57 A076 12.0 m -067.45.20.5 -22.53.33.8 -77.9912 -882.7202 24.5746 2224948.594573 -5440040.072181 -2481852.627906
33 DV06 A084 12.0 m -067.45.16.9 -22.53.37.5 23.9626 -996.3202 27.1402 2225027.120022 -5439962.762702 -2481958.278249
34 DV17 W210 12.0 m -067.45.57.7 -22.51.33.3 -1137.4996 2844.6199 38.2633 2224521.000111 -5441793.949366 -2478423.753436
35 DA42 A006 12.0 m -067.45.15.0 -22.53.28.0 79.0341 -702.0943 21.7808 2225119.550721 -5440043.281111 -2481685.140708
36 DA58 A001 12.0 m -067.45.16.9 -22.53.27.7 24.1874 -693.3973 21.7958 2225070.074392 -5440067.187897 -2481677.134375
37 DA60 P404 12.0 m -067.43.31.4 -22.52.01.7 3030.2243 1966.1451 -90.6526 2228204.627818 -5439789.482954 -2479183.119722
38 DV21 A004 12.0 m -067.45.15.9 -22.53.28.0 52.6610 -704.4153 21.2731 2225094.622784 -5440051.996461 -2481687.081397
39 DV22 A011 12.0 m -067.45.14.4 -22.53.28.4 95.9123 -716.5004 21.0945 2225132.811134 -5440031.119841 -2481698.145329
40 DV25 A005 12.0 m -067.45.14.8 -22.53.28.7 83.3299 -725.0733 21.2227 2225119.948051 -5440032.905902 -2481706.093001
41 DA65 P401 12.0 m -067.43.55.7 -22.52.15.9 2338.6115 1525.3007 -76.2942 2227504.628197 -5439905.326729 -2479594.886319
Inspecting the data
The PlotMS task is an important and versatile tool that allows the user to look at the UV data in a graphical manner. Let's start by plotting the Amplitude as a function of UV distance.
# In CASA plotms(vis='HLTau_B6cont.calavg',coloraxis='spw',yaxis='amp', xaxis='uvdist',avgchannel='4',avgtime='300',avgscan=True, plotfile='HLTau_B6cont.calavg.ampuvdist.png')
You should see a GUI as in the Figure. The colors in the figure identify different spectral windows. What does the plot immediately tell you about the source structure? (hint: think of Fourier transforms)
Zoom in to shorter baselines using the zoom tool at the lower left corner of the plot window (magnifying glass symbol). You can always unzoom by clicking the “Stack base” button (house).
Some bad data within the spw colored orange (spw=2) are immediately visible. You can investigate these by first using the “mark regions” tool in the middle (rectangle with a green plus sign in the corner), and then by clicking the “Locate” button (magnifying glass on a sheet of paper next to the flag buttons). This will print out information about the bad points on the Message window.
You should now see how all the bad data points involve antenna 16 and spectral window 2. By looking at the listobs printout, you can see that antenna 16 is DV01.
You can use flagdata command to remove these data. Do not close the plotms window yet! You can always reload and plot the data again from the GUI.
# In CASA flagdata(vis='HLTau_B6cont.calavg', antenna='DV01',spw='2',flagbackup=False)
There are some more data to be flagged, and we will just flag them without inspecting because plotting the data takes always quite a long time.
# In CASA flagdata('HLTau_B6cont.calavg', antenna='DA64&DV14',scan='275,315',flagbackup=False)
Now tick the “Reload” function and push the Plot button to re-plot the data after flagging. You should see how the bad points are gone.
You can also use the GUI tool to inspect other things in the data, such as the UV-coverage. In the Axes tab select X axis to be U and Data axis to be V. Click on the Plot button to re-plot the data. (Note that it takes quite a while to plot the data again).
Now you can close the plotms window. We will move on to CLEANing and self-calibrating the data.
First Look at Clean
Now use CLEAN to image. We set the image name to “HLTau_B6cont_mscale”, and use multifrequency synthesis (mode mfs) to make a single continuum image. Multifrequency synthesis combines data from all selected spectral channels into a single continuum image. Because the fractional bandwidth (delta nu/nu) is pretty small for this data set, we will not worry about the amplitude or structure of the source changing substantially with frequency. Therefore, we set nterms=1, telling CLEAN that each deconvolved component has a single amplitude at all frequencies.
Because of the non-optimal antenna configuration for high resolution imaging (lots of compact baselines) it is best to use robustness that emphasizes more uniform weighting like robust=0. Experiments with natural weighting yield a “double-structured” psf with a large 1“ plateau with a higher resolution (~30mas) core. The results of cleaning with a complex psf like this poorly represent the emission since the clean process assumes a Guassian restoring beam.
Because the emission has a wide range of spatial scales we use multiscale clean. When using this mode it is very important to make a careful mask and clean deeply. Thus the imaging commands below are best run interactively, though reasonable stopping thresholds have also been given.
We set the cell size to 0.005 arcseconds, which places ~4-5 pixels across a beam. You could figure out the beam size a priori, but it is often easier to just experiment with a quick imaging call and note the beam calculated by CLEAN. In this case, CLEAN reports a synthesized beam size of 35 x 20 milliarcsec, so our choice of cell size is just right. CLEAN will start in interactive mode, which allows you to manually control the threshold, major cycles, and masking.
# In CASA clean(vis='HLTau_B6cont.calavg', imagename='HLTau_B6cont_mscale', mode='mfs', nterms=1, imagermode='csclean', imsize=1600, cell='0.005arcsec', multiscale=[0,5,15], negcomponent=10, mask='', weighting='briggs', robust=0.0, interactive=True, niter=10000, threshold='0.1mJy')
After running the clean task, you will be presented with the GUI as shown in Figure 2. You can make the image larger by clicking next to the x button at the top of the image display, and dragging from the lower right corner.
In the CLEAN viewer, make sure that your buttons are set to add a new oval mask region. You may need to click on the icon showing the “R” in an oval. Draw an oval mask around the emission region (All that is showing up as “bluer” in the center of the image). Double click inside the oval and watch it turn white (See Figure 2). When setting the clean mask, you should aim to capture the real emission and not much else.
Change the number of iterations to 300 (from default 100 in upper right of interactive clean window). In the “Next Action” section of the GUI, you will notice several control buttons. Hit the green circle button to begin the cleaning process. This will run a major cycle of cleaning and then return. You should see how it writes text on the log, and also follow the progress on the main casa window.
After the first round of cleaning, the plot displays the residual emission after the major cycle. When interactive comes back, check that mask still seems reasonable, adjust as needed, and then clean 1000 iterations. Repeat check of mask, adjust as needed, clean 3000 iterations. Next clean 6000 iterations, followed by 12000 – it will stop when it gets to residual set by threshold parameter. There is still significant emission at this point but for first iteration its best to be conservative.
Have a quick look at the files that CLEAN has created:
# In CASA
ls
The .image file is the final cleaned image. The .mask entry shows the clean mask, or the area that CLEANed, the .model is the set of modeled clean components used by CLEAN (in Jy/pixel), the .flux shows the primary beam response, the .residual shows what was left after you CLEANed (the “dirty” part of the final image), and the .psf file shows the synthesized beam. So much good stuff. You can look at all of these using the CASA viewer. From within CASA, the viewer can be started with “viewer()”, or “imview()”. You can also start the viewer as a stand-alone unix utility using the unix command “casaviewer”. Here, let's examine the cleaned image:
# In CASA imview("HLTau_B6cont_mscale.image")
Self-calibration
Now you are ready for the first set of self-cal. In addition to creating an image, CLEAN saves the cleaned “model” of the science target with the measurement set. This model is required for later self-calibration steps. Of course this model for our science target is not perfect, only as good as the first clean, but it's a good starting point. With a model in place, we are in a position to calibrate the science target directly.
We use gaincal, which is the task used both for general gain calibration using an external calibrator, and for self-calibration. We will focus here on phase corrections (calmode = 'p') - generally good practice for self calibration - because amplitude self calibration has a larger potential to change the source characteristics (i.e. introduce artifacts). Figuring out the best averaging parameters is often the key to good self-calibration. You would like the solution interval to be short enough so that it tracks changes in the atmospheric phase with high accuracy, but long enough so that you measure phases with good signal-to-noise. Also, ideally you'd like to keep solutions separate for difference spw's and polarizations, but for faint sources when you need to boost SNR, it may be necessary to average over these parameters to achieve good solutions.
Start by getting a few solutions per dataset. Each scan is about 70s long and there are about 32 scans per dataset over about 49m20s. solint='600s' will give 5 solutions per execution. We name the calibration table as “pcal1”. Gaintype “T” means that it averages the two polarizations before determining a solution, while “G” would generate solutions for both polarizations independently. We also set a minimum acceptable signal-to-noise ratio for the scans and a minimum number of baselines for each scan.
#in CASA #first remove any old reductions with the same name os.system('rm -rf pcal1') #then run the gaincal task gaincal(vis='HLTau_B6cont.calavg', caltable='pcal1', gaintype='T', refant='DA51', calmode='p', combine='spw,scan', solint='600s', minsnr=3.0, minblperant=6)
Plot the resulting solutions. The first plot shows the resulting phases for each antenna separately, the second plot in one plot for all antennas.
#in CASA plotcal(caltable='pcal1',xaxis='time',yaxis='phase',timerange='', spw='',iteration='antenna',subplot=411,plotrange=[0,0,-180,180]) plotcal(caltable='pcal1',xaxis='time',yaxis='phase',timerange='',spw='',subplot=111)
We are finding nontrivial, though not enormous, solutions (a few 10s of degrees) with the two correlations tracking one another pretty well. If the data were already perfectly calibrated, these values would solve to be zero.
Apply the solutions. Because there were quite a number of failed solutions (such that data will be flagged when applycal is run), it is best to back the flags up so that if you don't like the results of this self-cal after imaging, these flags can be restored. This can also be done in applycal itself but this way we get to pick the name of the saved version.
#in CASA flagmanager(vis='HLTau_B6cont.calavg',mode='save',versionname='before_selfcal') applycal(vis='HLTau_B6cont.calavg',spwmap=[0,0,0,0],gaintable=['pcal1'],calwt=F,flagbackup=F)
Second round of CLEAN and self-cal
Now clean the self-calibrated data. Set the iterations in the interactive CLEAN to 1000, 3000, 6000, 6000. See also how it now uses the mask from the previous clean. First remove any old reductions with the same name.
#in CASA os.system('rm -rf HLTau_B6cont_mscale_p1.*') clean(vis='HLTau_B6cont.calavg', imagename='HLTau_B6cont_mscale_p1', mode='mfs', nterms=1, imagermode='csclean', imsize=1600, cell='0.005arcsec', multiscale=[0,5,15], negcomponent=10, mask='HLTau_B6cont_mscale.mask', weighting='briggs', robust=0.0, interactive=True, niter=10000, threshold='0.075mJy')
You can again use imview to look at the image
#in CASA imview("HLTau_B6cont_mscale_p1.image")
You can compare this to the other image by loading them interactively using the viewer. Use the GUI to load several images, and then use the tape deck to control which image is actively displayed in the panel.
Run self-cal again. This time try one solution per scan.
#in CASA os.system('rm -rf pcal2') gaincal(vis='HLTau_B6cont.calavg', caltable='pcal2', gaintype='T', refant='DA51', calmode='p', combine='spw', solint='inf', minsnr=3.0, minblperant=6)
Plot the results
#in CASA plotcal(caltable='pcal2',xaxis='time',yaxis='phase',timerange='',spw='',iteration='antenna',subplot=411,plotrange=[0,0,-180,180]) plotcal(caltable='pcal2',xaxis='time',yaxis='phase',timerange='',spw='',subplot=111)
Now you will see more solutions per antenna. Apply the solutions.
#in CASA #first save the flags to another name flagmanager(vis='HLTau_B6cont.calavg',mode='save',versionname='before_P2selfcal') #apply the solutions applycal(vis='HLTau_B6cont.calavg',spwmap=[0,0,0,0],spw='',field='',gaintable=['pcal2'],gainfield='',calwt=F,flagbackup=T)
Final set of CLEAN and self-cal
The next step would be one more round of cleaning followed by amplitude self-cal. The latter is potentially dangerous as it has much more potential to change the characteristics of the source than phase self-calibration so when working on real data, it is a good idea to consult an expert before doing this. Luckily for us, we have already been provided with good calibration tables for both phase and amplitude self-cal. You can now proceed by copying these over using another terminal window where you are in the same directory as where the CASA session is open.
#in bash cp -rf /course_data/alma/HLTau/HLTau_Band6_CalibratedData/calibration/* .
This copies two folders pcal2 (with the phase-cal solutions) and apcal (with the amplitude-cal solutions) to your working directory. You can now apply these solutions to your dataset.
#in CASA applycal(vis='HLTau_B6cont.calavg',spwmap=[[0,0,0,0],[0,0,0,0]],spw='',field='',gaintable=['pcal2','apcal'],gainfield='',calwt=F,flagbackup=T)
Run a final set of CLEAN on the data. You can now run it in the non-interactive mode.
#in CASA os.system('rm -rf HLTau_B6cont_mscale_ap.*') clean(vis='HLTau_B6cont.calavg', imagename='HLTau_B6cont_mscale_ap', mode='mfs', nterms=1, imagermode='csclean', imsize=1600, cell='0.005arcsec', multiscale=[0,5,15], negcomponent=10, mask='HLTau_B6cont_mscale.mask', weighting='briggs', robust=0.0, interactive=False, niter=10000, threshold='0.025mJy')
Primary beam correction
An important subtlety of CLEAN is that by default the image produced by CLEAN is not corrected for the primary beam (the field of view) of the individual dishes in the array. The primary beam response is typically a Gaussian with value 1 at the center of the field. To form an astronomically correct image of the sky, the output of CLEAN needs to be divided by this primary beam (or, in the case of mosaics, the combination of primary beam patterns used to make the mosaic). Fortunately, CASA stores the primary beam information needed to make this correction in an image file with a ”.flux“ extension. It's often very convenient to work in images before primary beam correction because the noise is the same across the field (e.g., this is a clean data set to search for signal) but it's very important to remember to apply this correction before calculating fluxes or intensities for science.
The CASA task impbcor can be used to combine the .flux image with the output image from CLEAN to produce a primary-beam corrected image.
First remove the old primary beam corrected image if it exists
# In CASA os.system('rm –rf HLTau_B6cont_mscale_pbcor.image')
Now correct the image
# In CASA impbcor(imagename='HLTau_B6cont_mscale_ap.image', pbimage='HLTau_B6cont_mscale_ap.flux', outfile='HLTau_B6cont_mscale_pbcor.image')
Now you can export your image to a fits file.
#in CASA exportfits('HLTau_B6cont_mscale_pbcor.image','HLTau_B6cont_mscale_pbcor.image.fits')
And view it with e.g. ds9. In a terminal:
#in bash
ds9 HLTau_B6cont_mscale_pbcor.image.fits
Select color (for example heat) to see the image in color.
Congratulations! You have now made an image of HL Tau protoplanetary disk!
