Input Files

1. A list of spectrum files as produced by rgsproc with the option attstyle=user including the parameters attra, attdec and attapos.
2. A list of event files as produced by rgsproc.
3. A list of source list files as produced by rgssources or rgsproc.
4. A list of background spectrum files as produced by rgsproc with the option attstyle=user including the parameters attra, attdec and attapos (optional).