---------- Forwarded message ----------
Date: Sat, 5 Jun 1999 15:38:00 +0100 (BST)
From: P N Werner <P.Werner@bristol.ac.uk>
To: Matthew Cheselka <cheselka@noao.edu>
Subject: re: "onedspec" questionDear MatthewThank you very much for your reply. I will try this.I now have another question, this time regarding the 'background' task in
the 'longslit' package. I don't seem to be able to get satisfactory
background subtraction near strong night-sky lines. No matter how much I
play around with the various parameters (fitting function, fitting order,
high and low sigma-rejection, ...) I *always* have really obvious skyline
residuals left in my background subtracted image. This is not an enormous
problem, as I can mask out the affected regions if I know where they are,
but it is still slightly annoying. Do you think I am doing something
wrong, or is 'background' generally thought to be unsatisfactory near
prominent night-sky lines? Regards,
PierreP.S.: I'm sorry to hassle you with these questions, but I am part of a
very small astrophysics group, and I am one of the only people who use
IRAF for optical spectroscopy, so there aren't many people around who can
give me advice.
"onedspec" question (fwd)
06/07/1999 05:57PM (Read 245 times)
