1/27/2024 0 Comments Data merge in sasThe thread below reflects the new and correct way of extracting and combining spectra. The only requirment is that the RMF is being extracted with the same bin width, as outlined below. In fact, we recommend strongly against doing this, as this will lead to a wrong energy scale at low energies. We note that since SAS v20.0 it is no longer necessary to extract all spectra over the same channel / energy interval. For each EPIC exposure, a spectral set is made out of source+background spectrum, background spectrum, response and effective area files. This thread assumes as starting point one set of spectral files for each one of the EPIC exposures that are going to be merged.
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