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Last modified: December 2013

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

set_coord

Context: data

Synopsis

Set the image coordinate system

Syntax

set_coord( [id], coord=None)

Description

The set_coord command sets the coordinate system of the specified image. Image (logical) coordinates are used by default when reading an image. Functions from the WCS library are used to change the coordinate system to physical or world.

  • 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")
  • coord - the coordinate system to use; allowed values are logical, physical, world, image (same as logical), and wcs (same as world)

Example 1

sherpa> set_coord("wcs")

The image coordinate system is set to world coordinates for dataset 1.

Example 2

sherpa> set_coord("srcimg", "physical")

The coordinate system for image dataset "srcimg" is set to physical coordinates.

Bugs

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

See Also

confidence
set_conf_opt, set_covar_opt, set_proj_opt
data
set_areascal, set_arf, set_backscal, set_bkg, set_counts, set_data, set_exposure, set_grouping, set_quality, set_rmf, set_staterror, set_syserror
filtering
set_filter
methods
set_iter_method, set_iter_method_opt, set_method, set_method_opt
modeling
get_par, set_bkg_model, set_full_model, set_par, set_pileup_model, set_source, set_xsabund, set_xscosmo, set_xsxsect, set_xsxset
statistics
set_prior, set_sampler, set_sampler_opt, set_stat
utilities
set_analysis, set_default_id
visualization
image_setregion

Last modified: December 2013
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