# image_psf¶

sherpa.astro.ui.image_psf(id=None, newframe=False, tile=False)

Display the 2D PSF model for a data set in the image viewer.

The image viewer is automatically started if it is not already open.

Parameters
• id (int or str, optional) – The data set. If not given then the default identifier is used, as returned by get_default_id.

• newframe (bool, optional) – Create a new frame for the data? If False, the default, then the data will be displayed in the current frame.

• tile (bool, optional) – Should the frames be tiles? If False, the default, then only a single frame is displayed.

Raises

sherpa.utils.err.IdentifierErr – If the data set does not exist.

See also

get_psf_image()

Return the data used by image_psf.

image_close()

Close the image viewer.

image_data()

Display a data set in the image viewer.

image_fit()

Display the data, model, and residuals for a data set in the image viewer.

image_model()

Display the model for a data set in the image viewer.

image_open()

Open the image viewer.

image_source()

Display the model for a data set in the image viewer.

plot_psf()

Plot the 1D PSF model applied to a data set.

Notes

Image visualization is optional, and provided by the DS9 application 1.

References

1

http://ds9.si.edu/site/Home.html

Examples

>>> image_psf()

>>> image_psf(2)