get_source_image

sherpa.astro.ui.get_source_image(id: IdType | None = None)

Return the data used by image_source.

Evaluate the source expression for the image pixels - without any PSF convolution - and return the results.

Parameters:

idint, str, or None, optional

The data set. If not given then the default identifier is used, as returned by get_default_id.

Returns:

src_imga sherpa.image.SourceImage instance

The y attribute contains the source model values as a 2D NumPy array.

Raises:

sherpa.utils.err.IdentifierErr

If the data set does not exist or a source expression has not been set.

See also

get_model_image

Return the data used by image_model.

contour_source

Contour the values of the model, without any PSF.

image_source

Display the source expression for a data set in the image viewer.

Examples

Return the model data for the default data set:

>>> sinfo = get_source_image()
>>> sinfo.y.shape
(150, 175)