The task performs consistency and keyword checks on an input FITS file to determine whether it satisfies the spectral file standard, reporting the results to the terminal or a text file.
The task checks for mandatory keywords and optional keywords. Optional keywords are recommended to supply further detailed informations regarding data sets.
For more information about the standard, see the memo OGIP Spectral File Format, OGIP/92-007 (or in PDF).
https://heasarc.gsfc.nasa.gov/docs/heasarc/ofwg/docs/spectra/ogip_92_007/ogip_92_007.html
https://heasarc.gsfc.nasa.gov/docs/heasarc/ofwg/docs/spectra/ogip_92_007.pdf - PDF
The mandatory keywords checked are:
TELESCOP, INSTRUME, FILTER, EXPOSURE, AREASCAL, BACKFILE, BACKSCAL, CORRFILE, CORRSCAL, RESPFILE, ANCRFILE, HDUCLASS, HDUCLAS1, HDUVERS, CHANTYPE, DETCHANS
The optional keywords checked are:
XFLTXXXX, POISSERR, OBJECT, RA-OBJ, DEC-OBJ, EQUINOX, RADECSYS, DATE-OBS, TIME-OBS, DATE-END, TIME-END, CREATOR, HDUCLAS2, HDUCLAS3, HDUCLAS4