CASA, the Common Astronomy Software Applications package, is the primary data processing software for the Atacama Large Millimeter/submillimeter Array (ALMA) and NSF's Karl G. Jansky Very Large Array (VLA), and is frequently used also for other radio telescopes. The CASA software can process data from both single-dish and aperture-synthesis telescopes, and one of its core functionalities is to support the data reduction and imaging pipelines for ALMA, VLA and the VLA Sky Survey (VLASS).

Latest CASA Release: 6.6*

                • Google Colab: pip-wheels for Python 3.10 (Google Colab) are now available.
                • getephemtable: new task to retrieve JPL-Horizons ephemeris data.
                • getcalmodvla: new task to to retrieve flux calibrator brightness distributions and create component lists.
                • gencal: new parameter ant_pos_time to limit period for which antenna position corrections are included.
                • tclean: algorithmic improvements to the ASP deconvolver for large spread of spatial scales.
                • tclean/sdintimaging: now checks for mismatches in column states when given multiple input MSs.
                • tclean/sdintimaging: now sorts input list of MSes in chronological order.
                • tec_maps: now consistent with new file-naming convention on remote CDDIS server.
                • simulator: simutil now performs case sensitive comparisons for 'known observatories'.
                • plotms: correlation selection now supports standard Stokes parameters and polarization quantities.
                • Installation: test script added to test the CASA installation.
                • defintent: new task to modify the scan intents of a measurement set.
                • sdimaging: new parameter convertfirst, to reduce the number of direction conversions.
                • deconvolve: mtmfs enabled as an algorithm option.
                • tclean/deconvolve: return dictionaries added for niter=0 calls.
                • image tool: fitsheader function added to return FITS header as Python dictionary.
                • plotms: parameter colorizeoverlay added to better specify overlay colors.
                • plotms: better specifies values in the legend when coloraxis is set.
                • Multiple MS input: clarifications added to the CASA logger on how CASA handles input of multiple MSs.
                • Telemetry/crash reporter: functionality deprecated.

                 For details and more, see

CASA is being developed by an international team of scientists based at the National Radio Astronomical Observatory (NRAO), the European Southern Observatory (ESO), and the National Astronomical Observatory of Japan (NAOJ), under the guidance of NRAO.