IRAS16293 Band9 - Calibration for CASA 3.3: Difference between revisions

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==Overview==
==Overview==


overview..
This part of the casa guide will guide you through the basic inspection of the data, paying special attention to detect data that needs to be flagged. The guide goes later to the process of full calibration to split the data.


The general procedure in this guide follows the other ALMA CASA guides: [[NGC3256Band3]] and [[TWHydraBand7]].
The general procedure in this guide follows the other ALMA CASA guides: [[NGC3256Band3]] and [[AntennaeBand7]].


==Unpack the Data==
==Unpack the Data==
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tar -xvzf IRAS16293_Band9_UnCalibratedMSandTablesForReduction.tgz
tar -xvzf IRAS16293_Band9_UnCalibratedMSandTablesForReduction.tgz
</source>
then change directory to the new directory 
<source lang="bash">


cd IRAS16293_Band9_UnCalibratedMSandTablesForReduction
cd IRAS16293_Band9_UnCalibratedMSandTablesForReduction
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</source>
</source>


You may wish to type
You have a number of files with extensions ".ms", which are CASA measurement set (MS) files. You will also see files containing system temperature (Tsys), water vapor radiometer (WVR), and antenna position information.
 
<source lang="bash">
 
ls
 
</source>
 
to look at the files present. You should see a set of files with extension ".ms". These are CASA measurement set (MS) files. The data have already been converted to MS format from the native ALMA format (ASDM) using the CASA task {{importasdm}}. In addition to the data, we provide you with calibration tables containing system temperature (Tsys), water vapor radiometer (WVR), and antenna position information. For Early Science, these tables will either be pre-applied or supplied with the data.


To begin, start CASA by typing
To start CASA type


<source lang="bash">
<source lang="bash">

Revision as of 14:23, 17 May 2012


  • This portion of the guide covers calibration of the raw visibility data. To skip to the imaging portion of the guide, see: IRAS16293_Band9_-_Imaging.

Overview

This part of the casa guide will guide you through the basic inspection of the data, paying special attention to detect data that needs to be flagged. The guide goes later to the process of full calibration to split the data.

The general procedure in this guide follows the other ALMA CASA guides: NGC3256Band3 and AntennaeBand7.

Unpack the Data

Once you have downloaded the IRAS16293_Band9_UnCalibratedMSandTablesForReduction.tgz, unpack the file in a terminal outside CASA using 

tar -xvzf IRAS16293_Band9_UnCalibratedMSandTablesForReduction.tgz

cd IRAS16293_Band9_UnCalibratedMSandTablesForReduction

You have a number of files with extensions ".ms", which are CASA measurement set (MS) files. You will also see files containing system temperature (Tsys), water vapor radiometer (WVR), and antenna position information.

To start CASA type 

casapy

Be sure that you are using the version indicated at the top of this page.

Initial Inspection

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