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: 6.7

                • Intel Macs: CASA 6.7.0 no longer runs on Mac OS Intel x86 machines.
                • CASA Viewer: the CASA Viewer is no longer packaged with Mac OS (details here).
                • sdimaging: task sdimaging is deprecated (use tsdimaging instead).
                • tclean: new (experimental) gridder option ‘awp2’ (refactor of awproject).
                • gencal: added support for the output of task getantposalma.
                • fringefit: updated support of corrcomb=’stokes’ (formerly ‘all’) and corrcomb=’parallel’.
                • phaseshift: added multi-field specification of the phasecenter parameter.
                • sdimaging/tsdimaging: proper derivation of weight values for Stokes I.
                • plotbandpass: upgraded to support band-to-band calibration.
                • plotbandpass: plotting of hsd_skycal solutions.
                • plotbandpass: more robust identification of unique solution timestamps.
                • smoothcal: improvements to smoothing of fringefit solutions.
                • msmd.almaspws: identifies ALMA FDM spectral windows with heavy online channel averaging.
                • tclean: initial work to support GPU gridding (not yet available for general use).

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.