iraf.net

NUMBER:	321
MODULE:	calibrate (in onedspec, longslit, and imred spectral packages)
SYSTEM:	V2.10.3-V2.10.4
DATE:	Mon Dec  4 17:48:49 MST 1995
FROM:	valdes

BUG:	If the AIRMASS keyword is not in the image header but other
	keywords from which the airmass may be computed (RA,DEC,ST or
	DEC,HA) are present, the computation of the airmass is not properly
	returned causing a floating point exception.  Note that if
	it can't compute the airmass at all the user prompted for
	the airmass as intended.

	The workaround is to set the airmass keyword in the header
	using either SETAIRMASS or ASTHEDIT.

STATUS:	Fixed for the next release.