... CAL/GEN/92-002¹

All OGIP memos of general interest are available on the WWW at the URL http://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/caldb_docs.html. A subset of these will eventually appear as articles in Legacy, but are also available on request from Pat Tyler, Code 662, NASA/GSFC, Greenbelt, MD 20771, USA

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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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