iraf.net

NUMBER:	324
MODULE:	photcal.mkapfile,photcal.apfile
SYSTEM:	V2.10
DATE:	Mon Jan 29 17:13:22 MST 1996
FROM:	davis

BUG:	The mkapfile/apfile tasks can go into an infinite loop while
	fitting the seeing radius RO for an image if the input image objects
	are not stars, e.g. are cosmic rays or galaxies.  Objects for which
	there is no good data at all can produce a floating point error in the
	plotting code because the data limits of the plot are not
	being set properly.

STATUS:	Both problems have been fixed for the next release of IRAF and
	in the version of photcal in the external addon package digiphotx.
	For both problems the workaround is to eliminate the bad data
	from the input photometry file.