- ... CAL/GEN/92-0021
- All OGIP
memos of general interest are available at
https://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/caldb_doc.html
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- ... format2
- Though XSPEC Versions 8.0 onwards
also allow input of FITS PHA files which do not conform to the standard
described here
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