Do I need to use pcarsp to create a different response matrix for each spectrum?
The correct response matrix (RMF) will depend on which layers and detectors you used to extract each spectrum as well as on the gain in the detector(s) in which the data were taken. If you want to correct the collimator response for an offset pointing or spacecraft jitter, you need to give an attitude file which corresponds to the dataset from which you obtained the spectrum. In addition, pcarmf now accounts for the slow drift in the detector gain, which means that for a truely accurate response, observations separated by more than a few months should have separate respons matrices made to take this into account. Why does the script pcarsp seem to hang at the xpcaarf step? The script pcarsp calls xpcaarf if you give it an attitude file (either the housekeeping file or the filter file) from which to derive the offset from the nominal source and pointing positions. There are two common occurrences of xpcaarf hanging, both simply having to do with giving it an unreasonably large offset. F
