Author: Emmanuel Di Folco

2024-12-12: New Major Release (4.4)

The new version (4.4-01, December 2024) is now fully available for installation on Linux, Windows and MacOs (including a MacPorts package).

Version 4.4 is a major release with numerous improvements compared to Version 4.2. The most significant changes are :

  • Full polarization support.
  • More tools to handle non regular and/or non contiguous frequency axes: see commands UV_MERGE, UV_LINEARIZE
  • Better handling for Proper Motion (a reference epoch can now be specified)
  • Better Multiple spatial scales clean with command GCLEAN
  • Improved SELFCAL for wide band data.
  • New REPORT command to prepare a PDF summary of an observation set, before and after the PIPELINE execution.

2024-04🪲: PIPELINE /MODE SURVEY

Bug corrected in the distributed version 4.0 (and beyond):

PIPELINE /MODE SURVEY was not working properly when strong lines were present in spectral window, because line subtracting was improperly done, and contaminated the full bandwidth.

Note that the PIPELINE /MODE ALL with NO Catalog was similarly affected, whereas other modes (including PIPELINE /MODE ALL with a Catalog) were not affected by this issue.

2024-04🪲: PIPELINE/Line identification

Bug corrected in the distributed version 4.0 (and beyond):

Description: PIPELINE crashes (in Survey mode): Continuum image could not be created.

This was due to incorrect channel flagging when a strong/broad line is present close to the edge of a frequency band. In some cases, too many (if not all) channels were flagged, resulting in no continuum channels.

Recommandation: you may test first the line identification with the UV_PREVIEW command before starting the imaging process with the PIPELINE (adjusting TAPER, SMOOTH and CLIP variables may help, if the problem persists in exotic cases).