Common Astronomy Software ApplicationsΒΆ

CASA, the Common Astronomy Software Applications, is the primary data processing software for the Atacama Large Millimeter/submillimeter Array (ALMA) and Karl G. Jansky Very Large Array (VLA), and is often used also for other radio telescopes.

6.4.1 Release

CASA 6.4.1 can now be (downloaded) for general use. CASA 6.4.1 is based on CASA 6.4.0, and the downloadable tar-file includes the pipelines for ALMA Cycle 9.


  • simulator: ALMA Band 1 parameters were updated in simulation tasks and tools

  • tclean: handling of mixed polarization setups was added

  • bug fixes

For more details on these and other new features, see the CASA 6.4.1 (Release Notes).

CASA is developed by an international consortium of scientists based at the National Radio Astronomical Observatory (NRAO), the European Southern Observatory (ESO), the National Astronomical Observatory of Japan (NAOJ), the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), CSIRO Astronomy and Space Science (CSIRO/CASS), and the Netherlands Institute for Radio Astronomy (ASTRON), under the guidance of NRAO.