The psf system displays a menu of options available, controllable using the PSF prompt. For example,
The menu is in two parts - the first lists those psfs which can be invoked by name (ANAL to XRT_PSPC) - the second shows allowed psf model specifications. The latter are used with applications which psf require a spatially varying psf, or one with energy dependency.ICL > PSS IMAGE ... PSF system options : ANAL ASCA EXOLE RESPFILE PWFC TABULAR WFC XRT_HRI XRT_PSPC CSPEC(psf/model,spec[,nbin]) POLAR(psf,rbin[,abin]) RECT(psf,xbin[,ybin]) PSF - Choose PSF to use for source model /'ANAL'/ > xrt_pspc
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