WSClean Version 2.0¶
Released 2016-11-04
Summary: This version adds baseline-based averaging, a feature that can improve the computational performance of imaging. Two other new features are -auto-threshold
: using a threshold relative to the noise level; and -continue
to start off where a previous deconvolution finished. Furthermore, quite a lot of small bugs were fixed.
New features:
Baseline-based averaging ) (SF #85).
Option
-continue
to continue a previous run (SF #79).Option
-auto-threshold
to calculate the threshold from the residual noise level.Option
-spws
to select which bands to image (SF #83).Primary beam correction for MF image. Primary beam corrected versions of the residual and model images are saved too (SF #82, requested by T. Shimwell).
Option
-simulate-noise
to perform a noise-only simulation.Connection to the Image Domain Gridder (IDG) is finished, testing continues.
Cleaned up FITS keywords, added keyword ‘WSCNORMF’ to allow easier PS normalization (SF #75).
WSClean unit tests are now shipped in the distribution and can be run with ‘make check’.
Fixes:
Use no cleaning border when a trimmed size is specified (SF #81).
Frequency headers in FITS file were wrong for datasets with multiple spectral windows (reported by R. van Weeren).
Channel width not set in fits if input has 1 channel (SF #87, reported by S. Bourke).
Incorrect frequency headers in PSFs (SF #93).
Incorrect frequency headers when imaging multi-spw sets (SF #90, reported by R. van Weeren).
Fitting of MFS image fails when highest frequency is flagged (reported by K. Emig).
Fix for imaging sets with reversed channels, which seems common for Miriad sets (Reported by L. Pratley).
Adding error message when requesting joined channels but not requesting more than one output channel (suggested by F. de Gasperin).
Solving bad deconvolution accuracy when single polarizations are flagged.
Improved speed of convolving the model with the restoring beam.
LOFAR beam did not use the right ra,dec in the first instance of beam creation.
Update help of
-beamsize
,-beamshape
and-theoreticbeam
.Make sure that primary beam is not updated faster than the integration time (Reported by A. Nilsson).
Fixed crash when applying beam on multi-channel set
Fixed compilation of the ‘operator’ library interface for connecting with custom deconvolution algorithms.
Enabled fast math for gridder (although no significant change in speed).
Fixed compilation on a Mac.
Better validation and error repporting of input.
Some refactoring.