What’s New in Photutils 1.11?#
Here we highlight some of the new functionality of the 1.11 release. In addition to these changes, Photutils 1.11 includes a large number of smaller improvements and bug fixes, which are described in the full Changelog.
SourceFinder npixels tuple input#
The SourceFinder npixels keyword can now
be a tuple corresponding to the values used for the source finder and
source deblender, respectively.
GriddedPSFModel Memory Usage#
The memory usage during PSF photometry when using a
GriddedPSFModel PSF model has been significantly
reduced. This is especially noticeable when fitting a large number of
stars.
New IterativePSFPhotometry mode keyword#
A mode keyword was added to IterativePSFPhotometry
for controlling the fitting mode. The mode keyword can
be set to ‘new’ or ‘all’.
For the ‘new’ mode (default), PSF photometry is run in each
iteration only on the new sources detected in the residual
image. The ‘new’ mode preserves the previous behavior of
IterativePSFPhotometry.
For the ‘all’ mode, PSF photometry is run in each iteration on all the detected sources (from all previous iterations) on the original, unsubtracted, data. For the ‘all’ mode, a source grouper must be input.
Initial tests indicate that the ‘all’ mode may give better results than the older ‘new’ method.
New include_localbkg keyword#
The PSF photometry make_model_image and make_residual_image
methods no longer include the local background by default, which
causes issues if the psf_shape of sources overlap. This is
a backwards-incompatible change. These methods now accept an
include_localbkg keyword . If the previous behavior is desired, set
include_localbkg=True.
Other changes#
Please see the Changelog for the complete list of changes.