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Last modified: December 2007

URL: http://cxc.harvard.edu/sherpabeta/load_arf.py.html

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AHELP for Sherpa 4.0 Beta load_arf Context: py.sherpa

Synopsis

Load ARF data by id

Syntax

load_arf( [id=1], filename, [resp_id=1] )
load_arf( [id=1], ARFCrate, [resp_id=1] )
load_arf( [id=1], PyFITS HDUList, [resp_id=1] )
load_arf( id=None, filename|ARFCrate|PyFITS HDUList, resp_id=None,
bkg_id=None )

Description

Load a FITS file containing ancillary response data given a filename and path, or an ARFCrate object, or a PyFITS HDUList object into a data set by data set ID and response ID.

The command can operate on any response of a source or background dataset by specifying the relevant ids.

Example 1

sherpa> load_rmf(rmf_crate, resp_id=1, bkg_id=2)
sherpa> load_arf("arf.fits", resp_id=1, bkg_id=2)

Load background responses on the second background (bkg_id=2) of a PHA data set. The RMF is loaded from a Crate; the ARF is loaded from a file. Both commands use the default data ID.

Example 2

sherpa> load_arf("arf.fits")
sherpa> load_arf("bkg", "arf.fits")
sherpa> load_arf(1, "arf.fits", 2)
sherpa> load_arf("arf.fits", resp_id=2)
sherpa> load_arf(crate)
sherpa> load_arf(hdulist)

The load_arf function can be called with just a filename and path argument, in which case the default id and resp_id will be used. Data set IDs and response IDs can be integers or strings; in the latter case a string can denote useful information about the data (e.g., whether it is your source or background data set).

Bugs

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

See Also

py.sherpa
load_ascii, load_data, load_image, load_pha, load_rmf, load_table, load_table_model
Last modified: December 2007


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