# get_psf¶

sherpa.astro.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. psf a sherpa.instrument.PSFModel instance sherpa.utils.err.IdentifierErr – If no PSF model has been set for the data set.

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.
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)