IRAS16293 Band9 - Calibration for CASA 3.3

• This script assumes that you have downloaded IRAS16293_Band9_UnCalibratedMSAndTablesForReduction.tgz from IRAS16293Band9#Download the data

• Details of the ALMA observations are provided at IRAS16293Band9

• 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

overview..

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

Unpack the Data

Once you have downloaded the Antennae_Band7_UnCalibratedMSandTablesForReduction.tgz, unpack the file in a terminal outside CASA using

tar -xvzf Antennae_Band7_UnCalibratedMSandTablesForReduction.tgz

then change directory to the new directory

cd Antennae_Band7_UnCalibratedMSandTablesForReduction

You may wish to type

ls

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 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

casapy

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