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)