Chandra X-Ray Observatory
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Last modified: December 2013

URL: http://cxc.harvard.edu/sherpa/ahelp/load_image.html
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AHELP for CIAO 4.9 Sherpa v1

load_image

Context: data

Synopsis

Load an image

Syntax

load_image( [id], filename|IMAGECrate, [coord="logical"] )

Description

The load_image command loads an image from a FITS file or an IMAGECrate and assigns it to a source id.

  • id - the id of the dataset to use; if not given, uses the default dataset id (id=1 by default, see "ahelp get_default_id")
  • filename|PHACrate - the name of the file (with path) or PHACrate which contains the PHA data
  • coord - the coordinate system: logical, image, physical, world, or wcs; default=logical

Example 1

sherpa> load_image("img.fits")

Load an image from the file img.fits using the default id (1) and coordinate system (logical).

Example 2

sherpa> load_image("psf", "psf.fits", coord="world")

An image is read from the file psf.fits with world coordinate system and given data id "psf".

Example 3

sherpa> imgcr = read_file("source.img")
sherpa> load_image(imgcr)

The image is read into an IMAGECrate (named "imgcr") from source.img. The image is then loaded into Sherpa from the crate, using the default options.

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.

See Also

data
dataspace1d, dataspace2d, datastack, fake, load_arf, load_arrays, load_ascii, load_bkg, load_bkg_arf, load_bkg_rmf, load_data, load_grouping, load_multi_arfs, load_multi_rmfs, load_pha, load_quality, load_rmf, load_staterror, load_syserror, load_table, pack_image, pack_pha, pack_table, unpack_arf, unpack_arrays, unpack_ascii, unpack_bkg, unpack_data, unpack_image, unpack_pha, unpack_rmf, unpack_table
filtering
load_filter
info
get_default_id, list_bkg_ids, list_data_ids
modeling
add_model, add_user_pars, image_model, image_model_component, image_source, image_source_component, load_table_model, load_template_model, load_user_model, save_model, save_source
psfs
image_kernel
saving
save_arrays, save_data, save_delchi, save_error, save_filter, save_grouping, save_image, save_pha, save_quality, save_resid, save_staterror, save_syserror, save_table
statistics
load_user_stat
visualization
contour, contour_data, contour_model, contour_ratio, contour_resid, image_close, image_data, image_deleteframes, image_fit, image_getregion, image_open, image_ratio, image_resid, image_setregion, image_xpaget, image_xpaset

Last modified: December 2013
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