Initial instructions for 2010

The data reduction tutorials will be taking place across the NMT campus, specifically in Weir Hall (Rm. 28), the Martin Speare Building (Rms. 128 and 209), and the Array Operations Center/Dominici Science Operations Center. There may be slight differences in installations between the various buildings. This document describes how to use CASA in the various buildings.

Gaining Access

The data reduction tutorials will use the imaging account. If the machine you will be using is not already logged into this account, do so. The tutorial leads will provide the password.

The home directory for the imaging account is common to all machines. Do not modify any files in the home directory.

First Steps

Each machine has a local installation of CASA and a local copy of the relevant data files and calibration models.

• Open a terminal window.
• Start the Opera Web browser and navigate to the relevant tutorials at CASAguides. Do not use the Firefox browser. If you attempt to do so, you'll most likely be met with error messages.

Machines in Weir and Speare

In the terminal window, cd into the directory /nrao, which is where the relevant data files and calibration models are stored. A directory listing, using ls -R should show the following:

% ls -R
ContiuumMosaic_Friday_EVLA_3C391:
3c391_ctm_mosaic_10s_spw0.ms

AdvancedTopicsLine_Tuesday_EVLA_3C391:
3c391_line_10s_summerschool.ms

SpectralLine_Friday_EVLA_IRC10216:
day2_TDEM0003_10s_norx

MMLineMosaic_Tuesday_CARMA_M99:
M99_CARMA.fits

Change directories (cd) into the directory relevant for your tutorial. Start CASA with casapy and begin the relevant tutorial.

Machines at the AOC

Change directories (cd) into the directory relevant for your tutorial. Start CASA with casapy and begin the relevant tutorial.

During Calibration

Various site-dependent files may be needed during calibration. One example would be model image files for setjy. One can attempt to use the Unix command locate to find a necessary file. One can also check the CASA installation location (see above).