WSClean Version 1.5

Released 2014-12-16

Summary: The PSF can now be fitted with an elliptical Gaussian, it is now possible to use “-scale 1asec” as well as set a uv-cut in lambda on top of in meters and several bugs were fixed.

Full list of changes:

  • Beam fitting: option -fitbeam (/ -nofitbeam) enables fitting an elliptical Gaussian to the PSF, and restoring is subsequently also performed with this elliptical PSF. This is not yet the default. (SF #17)

  • New options -circularbeam and -ellipticalbeam to control beam fitting.

  • New option -beamshape to set major/minor/position angle for elliptical beam shape.

  • Option -beamsize now takes arcseconds by default. It sets a manual circular beam, and understands units (e.g. -beamsize 2arcmin).

  • Wide-band mode can now also be enabled for single-polarisation imaging (SF #11).

  • The -scale parameter now accepts units, e.g. “-scale 1arcmin” (SF #21).

  • New option -tempdir for specifying alternative temporary directory for reordered files (SF #25).

  • No longer save gridding correction image by default, only save when new option -savegridding is given.

  • New option -minuv-l and -maxuv-l, which set the maximum uv values that are still gridded.

  • Options -minuvw and -maxuvw are renamed to -minuvw-m and -maxuvw-m to distinguish from above new options.

  • Bug fix: WSClean keywords were missing in MFS images (SF #20). Reported by N. Hurley-Walker.

  • Bug fix: parameters -multiscale-threshold-bias and -multiscale-scale-bias didn’t have effect in some multiscale modi.

  • Bug fix: Crash “Table column WEIGHT_SPECTRUM is unknown” when no weight column present. Reported by S. Makhathini (SF #22).

  • Bug fix: -interval parameter didn’t work correctly when using reordering. Reported by A. Rowlinson.

  • Bug fix: DATE-OBS keyword in fits output should reflect -interval setting. Reported by A. Rowlinson (SF #23).