CASA Hints, Tips, and Tricks

↵ Using CASA

For Newcomers

• Importing Data into CASA
• Loading and Running Tasks
• Selecting Spectral Windows and Channels
• General description of the data selection syntax
• Interpreting CASA output
• New Startup Screen
• Starting CASA Without the Logger
• What Version of CASA am I Running?
• Capturing Return Values
• Accessing the Newest Version of CASA at NRAO
• CASA Region Format and CASA Region Format Examples

More Advanced Topics

General

• Setting Up the Available Memory
• Fixing out of date TAI_UTC tables (missing information on leap seconds)
• Renaming a Field
• Renaming Antennas
• Creating lists of files for task input: using glob
• Waiting for read-lock on file
• Lattice Expression Language (LEL) as used, e.g. in immath
• Definition of a Measurement Set
• Definition of a Calibration Table
• CASA Parallel Processing
• Creating lists of files for task input: using glob

Calibration

• Combining Bandpasses
• Create a Component List for Selfcal
• Creating a Model for a Resolved Bandpass Calibrator

Imaging

• Description of Imaging Algorithms in CASA
• Diverging deconvolution results in 'csclean' and 'mosaic' modes
• Create a Simulated Image

Analysis

• How to rotate and slice a cube for pV diagrams
• Masking images for analysis
• Stacking Multiple Spectral Lines at Same Position

Writing a CASA Task

• Writing a CASA Task

Presents the basics of writing a CASA task, and provides examples of tasks that will be helpful and instructive.

EVLA

• Some Notes on VLA / EVLA gain curves and fluxscale
• VLA LST Calculator

Also check out the step-by-step tutorials on this wiki!

↵ CASAguides