get_psf
- sherpa.ui.get_psf(id=None)
Return the PSF model defined for a data set.
Return the parameter settings for the PSF model assigned to the data set.
- Parameters
id (int or str, optional) – The data set. If not given then the default identifier is used, as returned by
get_default_id
.- Returns
psf
- Return type
a
sherpa.instrument.PSFModel
instance- Raises
sherpa.utils.err.IdentifierErr – If no PSF model has been set for the data set.
See also
delete_psf
Delete the PSF model for a data set.
image_psf
Display the 2D PSF model for a data set in the image viewer.
list_psf_ids
List of all the data sets with a PSF.
load_psf
Create a PSF model.
plot_psf
Plot the 1D PSF model applied to a data set.
set_psf
Add a PSF model to a data set.
Examples
Change the size and center of the PSF for the default data set:
>>> psf = get_psf() >>> psf.size = (21, 21) >>> psf.center = (10, 10)