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Last modified: 29 October 2021

URL: https://cxc.cfa.harvard.edu/ciao/bugs/combine_spectra.html

Bugs: combine_spectra


Bugs

Incorrect NUMGRP and NUMELT keywords

The addresp tool is not updating the NUMGRP nor the NUMELT keywords in the output file to match the actual values in the MATRIX's N_GRP and N_CHAN columns. It is simply copying those keywords from the 1st file to the output file. These incorrect values have shown to cause problems with XSPEC v 12.11.0.