Fits Header One More Time

[Tom Droege <tdroege@veriomail.com>]

I am getting close.  Below is the fits header taken off last night's 
run.  It appears that I do not understand the units used for the world 
coordinates.  Will someone tell me the units used?  I have just gone 
through a lot of correspondence and no one seems to specify units.  My 
apologies if someone has done it right.  ;^)  Ahhh!  I just checked one 
more time and Michael did specify degrees for RA.  Hmmm!  Seems like a 
misnomer to me.

OK, below is the current header.  I have to fix it so RA is in 
degrees.  There is also the time difference between DATE and UT.  For this 
I will have to wait for Rob to start reading these posts again.

Please check the other units to make sure I have them right.

At this time I can read the fits files into DS9 and have the cursor make 
sense.  Getting close.

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 an
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    = '2001-04-12T03:19:17' / file creation date (YYYY-MM-DDThh:mm:ss UTC)
FILTER  = 'I       '
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      = '10:38:4.88'         / RA of Field Center
RATIME  = '1.980469'           / Seconds since turning on RA drive
IMAGETYP= 'object  '           / object frame
WATERTMP= '20.42651'           / Cooling water temperature
VCOTEMP = '23.72241'           / VCO Temperature
DEC     = '0:00:00 '           / Place Keeper for DEC of field center
CRVAL1  =                   0. / Place Keeper for DEC of field center
CRVAL2  =     10.6374667713148 / RA of Field Center
CTYPE1  = 'DEC--TAN'
CTYPE2  = 'RA---TAN'
CRPIX1  =                1016.
CD1_1   =             0.002126
CRPIX2  =                1015.
CD2_2   =            -0.002126
CDELT1  =             0.002126
CDELT2  =            -0.002126
CROTA1  =                   0.
CROTA2  =                   0.
UT      = '04:19:12'           / Universal time of #0 exposure (V) start
COMMENT   This is the #1 Camera File
DATE-OBS= '2001-04-12T04:19:14' / UT date-time of exposure start
UTSTART = '04:19:14'           / Universal time of #1 exposure (I) start
EXPTIME =             99.73926 / Open Time for Camera 1 usually I
GAIN    =                  2.5 / Place Keeper for Gain in electrons per adu
RDNOISE =                  25. / Place Keeper for Read Noise in electrons
CCDTEMP = '-14.97388'          / CCD Temperature Camera 1
END