WSClean version 3.4¶
Released 2023-10-11
Summary:
Version 3.4 contains a few major new features and important bugfixes. An important change is that the default gridder has been changed to the wgridder: in most cases this gridder is fast and more accurate (thanks to Martin Reinecke) compared to the wstacking gridder – the previous default gridder. Furthermore, there are quite some changes that improve complex imaging runs (e.g. faceting, DD psfs, IQUV imaging, etc.), memory & computational efficiency was further improved and various bugs have been solved.
To make use of EveryBeam, WSClean 3.4 requires EveryBeam version 0.5.2 or newer.
Full change list¶
The wgridder is now the default gridder.
Add an absolute auto mask threshold.
Facet feathering.
Support for the MeerKAT and ALMA beams.
Compression of auto-masks to reduce memory requirements.
Improve efficiency of data & meta-data reading.
Allow output of a psuedo-Stokes-I source list.
Support applying independent xx/yy solutions when imaging Stokes I.
Support for diagonal and full Stokes solution correction and IQUV imaging with beam.
Bug fixes¶
Solve flux-scale issues when using facet imaging with diagonal solutions and beam correction.
Solve a crash when the model column needs to be created for measurement sets with heterogeneous spws.
Fix a crash when
n_spws > 1
and pb correction is used.Improve rank filter when using Briggs weighting (issue reported by A. Kutkin and T. Oosterloo).
Fix DD PSF imaging with facets and multiple channels.
Fix possible corruption of start time (as written to FITS file).
Fix crash in multi-frequency imaging with iquv polarizations and beam correction.
Allow full Stokes facet imaging with beam and diagonal solutions.
Fix a few compilation issues and warnings on specific platforms.
Documentation improvements.