WSClean version 2.4¶
Released 2017-05-28
Summary: Version 2.4 mostly contains small improvements on various points. Improved source component output allows better integration with (DD and DI) self-calibration pipelines, and continued work on the integration with IDG is aiming towards a fast, full A-correction imager.
New features:
Option
-save-source-list
to save a component list including Gaussians for multi-scale components. The output format is supported by DPPP. Old option-save-component-list
has been removed.Source lists can be primary-beam corrected by combining
-save-source-list
with-apply-primary-beam
(SF #111).Added keywords
TELESCOP
,OBSERVER
andOBJECT
to fits output (SF #112).Fitting a Gaussian to the PSF is now more stable, and deals better with border cases (reported by G . Heald).
Multi-frequency cleaning will now properly take channel weights into account during spectral fitting and peak finding (SF #109)
Flux density values are now reported with sensible units, and units can be given on the cmdline (SF #104).
WSClean will by default now stop deconvolution after 20 major iterations, which can be changed with the new option
-nmiter
(SF #117, requested by N. Hurley Walker).Option
-save-psf-pb
to be able to get a corrected PSF.Option
-circularbeam
now properly performs a constrained fit (SF #55).Option
-multiscale-convolution-padding
to change the default padding.WSClean now reports the reason for stopping cleaning.
Slight increase of gridding speed, because X and Y dimensions of gridding kernel are now stored separately. Larger oversampling rates are now also supported.
Bugfixes:
Parameter
-stopnegative
was ignored since the new generalized cleaning algorithm was implemented (reported by N. Hurley-Walker and C. Tremblay).In multi-scale, joined polarizations mode, WSClean could not determine scale sizes when last channel has no unflagged visibilities (Reported by R. van Weeren).
In joined polarization mode, WSClean could continuously perform further major iterations without improving the residuals any further (reported by N. Hurley-Walker).
Deprecated parameter name
-rms-background
, which was renamed to-local-rms
.Fixes for IDG gridding; CPU and GPU gridding & cleaning with IDG works.
Version information now includes availability of IDG.
More unit tests.
Support proper displaying of negative angles.
Refactoring of primary beam correction code.