DEREDDEN - Removing reddening correction

Frank Valdes wrote on Dec 08, 1997

Q:  Suppose I have "deredden"ed spectrum, and I wish to have un"deredden"ed
spectrum. (for some reason I'm under this situation, or I guess it happens
when one wish to reanalyze the spectrum)

How could I un"derredden" the spectrum?  Is it possible to do that? or
I need to do calculate that myself?


A:  It is not obvious but at the end of the help page and in one of the
examples for the task DEREDDEN it shows that you can use a negative
extinction coefficient to  "redden" a spectrum.  If you just want
to undo a previous operation then change the sign of the extinction
value you used.

---

Last post on Dec 08, 1997