iraf.net

NUMBER:	290
MODULE:	scopy, sarith
SYSTEM:	V2.10.3
DATE:	Sat May 13 13:54:11 MST 1995
FROM:	valdes

BUG:	When spectra are modified with SPLOT and then written out, the
	current display units are also recorded.  SCOPY and SARITH
	incorrectly create new spectra with the dispersion units set to the
	display units.  For units which are linearly related (such as any
	between wavelength units or between energy/frequency units) this
	causes no problem.  However, for other pairs of units, such as
	dispersion units of angstroms but display units of EV, the new
	coordinate system will not match the spectrum pixels.  The
	workarounds are to avoid this situation or change the 'units' in
	the copied/output spectrum back to the original units with
	WCSEDIT.

STATUS:	Fixed in V2.10.4