[Issues] EPOCH info in FITS headers

Kor G. Begeman kgb at astro.rug.nl
Fri Apr 7 15:46:00 CEST 2006


Together with Ewout I discovered that none of the AW FITS headers 
contains information about the epoch of the coordinate system (WCS). 
This causes problems with sextractor and so also with SourceLists. If 
sextractor does not find the epoch information, it uses the DATE-OBS 
value (if present) for that which is clearly not what we want since all 
our AW FITS files (except maybe the FITS files which contain the raw 
data) are in J2000 WCS.
I just implemented a kludge in SourceList.make to overcome this problem 
but evidently the best solution is to add epoch information to the AW 
FITS files.



Dr. K.G. Begeman
Kapteyn Institute
University of Groningen
Postbus 800                         NL-9700 AV Groningen
Landleven 12                        NL-9747 AD Groningen
The Netherlands
Telephone                           +31-(0)50-3632454/4073
Telefax                             +31-(0)50-3636100
e-Mail                              kgb at astro.rug.nl
WWW                                 http://www.astro.rug.nl/~kgb

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