Re: New FITS Header

["Shawn \(Rolling Hills Obs\)" <rollinghillsobs@cfl.rr.com>]

Ok, how about the DATE vs DATE-OBS keywords?  Was the FITS file really
created an hour before the exposure?  Maybe this would speed up the
downloads - create all the files you think you might need for the night ;)

Shawn


----- Original Message -----
From: "Tom Droege" <tdroege@veriomail.com>
To: "Tom Droege" <tdroege@veriomail.com>; <tass@listserv.wwa.com>
Sent: Monday, April 09, 2001 6:59 PM
Subject: Re: New FITS Header


> OK, I have found one error, let's see if anyone else can find it or
others.
>
> Tom Droege
>
> At 05:43 PM 4/9/01 -0500, you wrote:
> >Fits Fans, here is the latest version of the fits header that I am
writing
> >on the data I take tonight.  Please, fits experts, read this carefully.
I
> >want to get to the point where I can take "keeper" data with TOM.  It
will
> >not be worth processing (I suspect) if the header is not in near final
form.
> >
> >Tom Droege
> >
> >SIMPLE  =                    T / file does conform to FITS standard
> >BITPIX  =                   16 / number of bits per data pixel
> >NAXIS   =                    2 / number of data axes
> >NAXIS1  =                 2043 / length of data axis 1
> >NAXIS2  =                 2037 / length of data axis 2
> >EXTEND  =                    T / FITS dataset may contain extensions
> >COMMENT   FITS (Flexible Image Transport System) format defined in
> >Astronomy and
> >COMMENT   Astrophysics Supplement Series v44/p363, v44/p371, v73/p359,
> >v73/p365.
> >COMMENT   Contact the NASA Science Office of Standards and Technology for
the
> >COMMENT   FITS Definition document #100 and other FITS information.
> >DATE    = '2001-04-09T21:21:23' / file creation date (YYYY-MM-DDThh:mm:ss
UTC)
> >FILTER  = 'V       '
> >LATITUDE=              41.8271 / Site H latitude, degrees north
> >LONGITUD=             -88.3125 / Site H longitude, degrees east
> >RALIM   =                 -9.5 / RA Limit Switch Position Degrees East
> >DECLIM  =                   0. / Declination limit switch Degrees North
> >DATASEC = '[ 17:2064, 1:2048]' / Place keeper for Active area of the
detector
> >BIASSEC = '[ 10: 15, 1:2048]'  / Place keeper for Under-Over scan region
> >TIMESYS = 'UT      '           / time system for exposure start
> >EPOCH   =                2001. / Place keeper for Epoch of coordinates
> >EQUINOX =                2000. / Place keeper for Equinox of coordinates
> >SCALE   =                  7.4 / Arc seconds per pixel
> >TIMEBASE= 'Manual GPS'         / By hand transfer to PC clock
> >COMMENT   Additions to Constant File
> >RA      = '4:31:8.97'          / RA of Field Center
> >CRVAL1  =     4.52471659378365 / RA of Field Center
> >RATIME  = '1.976563'           / Seconds since turning on RA drive
> >IMAGETYP= 'object  '           / object frame
> >WATERTMP= '26.92675'           / Cooling water temperature
> >VCOTEMP = '32.45043'           / VCO Temperature
> >DEC     = '0:00:00 '           / Place Keeper for DEC of field center
> >CRVAL2  = '0       '           / Place Keeper for DEC of field center
> >UT      = '22:21:18'           / Universal time of #0 exposure (V) start
> >COMMENT   This is the #0 Camera File
> >DATE-OBS= '2001-04-09T22:21:18' / UT date-time of exposure start
> >UTSTART = '22:21:18'           / Universal time of #0 exposure (V) start
> >EXPTIME =             99.85938 / Open Time for Camera 0 usually V
> >GAIN    =                  2.5 / Place Keeper for Gain in electrons per
adu
> >RDNOISE =                  25. / Place Keeper for Read Noise in electrons
> >CDTEMP = '4.77099 '           / CCD Temperature Camera 0
> >END
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