Optional Packages

• pimms (ftp://legacy.gsfc.nasa.gov/software/tools) or prop_pimms (http://asc.harvard.edu/soft/prop_port.html) for conversion of count rates to fluxes (simple case of a $\Gamma$=1.8 powerlaw hardcoded for the HRI). In either case, the binary should be in the user's PATH list. If pimms is not installed, then the flux column in source lists will contain 0 for most missions until arfs are generated.