iraf.net

NUMBER:	252
MODULE:	utilities.polyfit
SYSTEM:	V2.10
DATE:	Mon Jul 11 09:17:27 MST 1994
FROM:	davis

BUG:	The computation of chisqr and stdev are too large by a factor
	if yavg ** 2 if the weighting parameter is 'instrumental' and
	abs(yavg) if the weighting parameter is 'statistical'.

STATUS:	Fixed in 2.11. There is no workaround except to apply the 
	correction factors manually.