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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*

                • Mac ARM: CASA builds for Mac ARM are now available.
                • CASA Viewer: the CASA Viewer is no longer packaged with Mac OS (details here).
                • CASA config: addition of a new casaconfig package to handle configuration settings.
                • Google Colab: pip-wheels for Python 3.10 (Google Colab) are now available.
                • wvrgcal: re-written to be compatible with python3.10.
                • gencal: new caltype=’eop’ for creating EOP (Earth Orientation Parameter) correction tables.
                • gencal: new caltype=‘swpwts’ to use ‘swpow’ mode without temperature conversion factors.
                • sdbaseline: per spectrum sinusoid fitting for baseline subtraction.
                • sdimaging/tsdimaging: new parameter ‘interpolation’ to specify spectral interpolation rules.
                • setjy: will now exclusively use casaconfig to find the required data tables.
                • plotms: calibration table interface added in parameters and GUI.
                • polfromgain: new parameter 'minpacov' to specify minimum parallactic coverage threshold.
                • tclean: new mtmfs-via-cube imaging mode (specmode='mvc') with accurate wideband primary beam correction.
                • getephemtable: posrefsys keyword changed to ICRS; support non-alphanumeric characters.
                • setjy: usescratch defaults to True; False no longer allowed with Butler-JPL-Horizons.
                • fixplanets: removed functionality to attach JPL-Horizons ephemeris data in MIME format (use getephemtable instead).
                • 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.
                • CASA Docs: new CASA Memo 13 - a guide towards achieving scalable parallelization for imaging large cubes.
                • CASA Docs: updated Community Examples on wideband primary beam corrections and custom primary beam models.

                 For details and more, see