spectral packages
	arfgen	Generates an ancillary response file	PostScript	ChangeLog
	backcorr	Makes a background spectrum appropriate to the accumulation region of a source spectrum	PostScript	ChangeLog
	backscale	Calculation and setting of the BACKSCAL keyword	PostScript	ChangeLog
	eregionanalyse	Optimisation of point source extraction circle	PostScript	ChangeLog
	especget	Creation of source and background spectra and associated ARF/RMF	PostScript	ChangeLog
	especplot	Produces plots of the net source and background spectra for EPIC MOS/PN	PostScript	ChangeLog
	evselect	Filters event lists and extracts images, spectra, timeseries and histograms	PostScript	ChangeLog
	rgscombine	Combines multiple paired Spectrum and Response Matrix files and produce one final result file for each	PostScript	ChangeLog
	rgsfluxer	Combines and fluxes RGS spectra	PostScript	ChangeLog
	rgsregions	Constructs RGS event selection regions	PostScript	ChangeLog
	rgsrmfgen	Constructs an RGS response matrix file	PostScript	ChangeLog
	rgsspectrum	Extracts foreground and background spectra	PostScript	ChangeLog
	rgssuperrmf	Calls rgmsfgen using information from multiple observations to create one response	PostScript	ChangeLog
	rmfgen	Generates an OGIP-compliant RMF file	PostScript	ChangeLog
	selectlib	Data Selection infrastructure library	PostScript	ChangeLog
	xmmselect	Interactive data selection and accumulation of products	PostScript	ChangeLog