RE: Data to be collected in the 'master?' database

["Creager, Robert S" <CreagRS@LOUISVILLE.STORTEK.COM>]

Question on the PSF fitting.  I'm working on getting a pipeline going for
SPS, and currently, it doesn't have the ability (I believe) to generate the
Magnitude and sigma over a range of apertures for each star detected
(although I will attempt to verify this weekend).  Would this 'disqualify'
SPS from being a real player as part of a data reduction pipeline unless
modified?  Is Jim Heasley still listening?  Thoughts?

Under the heading "For each night:", I have Extraction and Astrometric
versions (I should add the Name I believe).  Is this what you're referring
to?

Darktime - I'm a little unsure on what you mean here, but I think this would
be have to be info calculated during the run, and so contained in the fits
header, yes?

Thanks for the comments,
Rob

> -----Original Message-----
> From: aah@nofs.navy.mil [mailto:aah@nofs.navy.mil]
> Sent: Friday, August 03, 2001 4:56 PM
> To: tass@listserv.wwa.com
> Subject: Re: Data to be collected in the 'master?' database
> 
> 
> A few comments.
>   *	Magnitude, sigma - in 7 apertures of increasing size 
> (or 1 for PSF),
>           adjusted to Tycho2 color
> 
> Whether or not psf fitting is provided, you will still need 
> the aperture
> magnitudes.  So the real storage is 7 apertures plus 
> optionally one psf
> magnitude.  Also, no adjustment to Tycho2 color; the numbers 
> should remain
> purely instrumental.
> 
> You should probably include the version number of the 
> processing program
> (that is, flatfield/darksub etc.).  A corresponding parameter is how
> the flats/darks were created: median, mode, skyflat or 
> twilightflat, etc.
> 
> You should include a 'darktime' parameter -- how long the CCD has been
> sitting before it is read out.  That can be different than 
> the exposure
> time.  For example, a focus plate will have several short exposures
> on the CCD before it is read out, so the dark current will be 
> the total
> length between the 'clean' and the read.  Or, we might 
> implement one of
> the observing modes used here, where during cloudy spells you suspend
> and resume exposures.
> 
> Universal Time needs to include UT date as well.
> 
> Good start!
> Arne
> 
>