Re: Common and uncommon goals and software

["Glenn Gombert" <glenngombert@hotmail.com>]

Tom,

  I don't see any advantage at all to putting the processing steps in the 
header of the Star-List...each site will probably use a different set of 
processing routines anyway....


  The only thing that would be really important would be the name of the 
processing program...and the site realted to where the data came from....

Glenn G


>From: Tom Droege <tdroege@veriomail.com>
>To: tass@listserv.wwa.com
>Subject: Re: Common and uncommon goals and software
>Date: Mon, 06 Nov 2000 08:22:09 -0600
>
>I have been reading this thread and trying to see if we have a
>consensus.  It would seem that Jure's last post meets all objections.
>
>I have one comment.  Should not the header include the processing steps
>applied to the data?  For example, we might have a star list, then a star
>list corrected for air mass.  I would show this by simply listing in the
>header all the programs that have processed the data so far with their
>version numbers.  This could be put in one of the comment positions.  A
>processing program would just read this list, append it's name, and rewrite
>it in the same comment in it's output.   This would allow a "Woops" when
>one attempted to merge two star lists which had undergone different 
>processing.
>
>If the below is acceptable to all, then I would like to make it a TN, and
>get on with processing data.  Please make objections as soon as
>possible.  Note this is just the format for exchanging star lists.  There
>will be other formats for images.
>
>Tom Droege
>-----------------------------------------------------------------------
>Jure writes:
>
>Taking my yesterday's summary and Arne's further suggestions (hopefully 
>all)
>into account, we come to the following scheme:
>
>
>Header
>-----------
>JD Julian Day
>FILTER
>EXPOSURE exposure time
>DATE-OBS start of observing (date + time)
>OBSERVER observatory code or information how to get observatory coordinates
>RA-CENTER
>DEC-CENTER
>CRVAL1, CRVAL2, etc..
>PLATE constants
>APERTURE_SIZE (diameter in pixels)
>PSFFUNCTION ? (I guess this would be needed)
>
>Table
>------------
>XT, YT image coordinates
>SXT, SXT error estimates for the above
>PSFMAG, PSFMAGERR magnitude and error estimate obtained by PSF
>APERTUREMAG, APERTUREMAGERR magnitude by aperture method
>FWHMX, FWHMY star shape useful for quality control
>ROUNDNESS, SHARPNESS (additional shape parameters)
>PEAK_DN (to decide whether a star is saturated, etc.)
>SKY_DN
>
>
>
>

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