From: clidman@eso.org
Date: Mon Nov 25 2002 - 06:59:09 PST
Dear All,
I have spent a couple of days trying different reduction techniques with
the FORS2 spectroscopic data. The main difference between what we have tried
before and what I am doing now is that I using the all the data within a single night
to produce a night sky spectrum which is then subtracted from the science data. It results in
spectra with very good sky subtraction. I have also been producing an error spectrum, which should
be used if one wants to smooth the spectrum.
I have re-reduced the following SNe. The other SNe will have to wait until I get back
from Paranal.
SuF02-081 - Strong line at 9234 Angstroms. If it is [OII], then z=1.478. There are some low S/N
wiggles in the continuum. This one is worth a more detailed look.
SuF02-002 - [OII] and [OIII] at z=0.822.
SuF02-065 - Probable SN, [OII] at z=1.181
SuF02-012 - Featureless. Flux calibration is OK.
I have looked for signs of an elliptical in the spectra of both 081 and 012 by looking for FeII 2600, MgII 2800 and MgI 2852,
but I cannot identify these lines. However, these lines would be hard to see in these low S/N spectra.
All the new spectra are available at http://www.sc.eso.org/~clidman/.
Cheers, Chris.
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