Plots an instrument response stored in a Fits Embedded
Function (FEF) file that is read in via
FEFFILE.
sherpa> FEFPLOT {<photon_energy> | <photon_wavelength>}
where {<photon_energy> | <photon_wavelength>} must be in the same units
that are used for photon energies in the FEF file (conventionally, keV
or Angstroms).
Read in part of a FEF file and plot the response as a function of counts-space energy, at photon energy 2.4 keV:
sherpa> FEFFILE "data/fef_response.fits[function][ccd_id=0,chipx>=1,chipx<=256,chipy>=1,chipy<=32]"
sherpa> FEFPLOT 2.4
The appearance of the plot may be subsequently altered using ChIPS commands such as:
sherpa> LIMITS X 0 3
sherpa> REDRAW
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