General description: The gimg files are produced the guider camera. Presently those are now stored separately in the gcam directory. These are simple 16-bit FITS images.
Naming convention: gimg-[DDDD].fits, The four digits look like some kind of timestamp but bear no resemblance to the times in the headers. Probably they are simply a sequence number.
Approximate size: 529920 bytes.
File type: FITS
Read by products: ???
Written by products: ???
Sample Header (HDU 0):
SIMPLE = T / conforms to FITS standard BITPIX = 16 / array data type NAXIS = 2 / number of array dimensions NAXIS1 = 512 NAXIS2 = 512 BSCALE = 1 BZERO = 32768 EXTEND = T IMAGETYP= 'object ' EXPTIME = 3.0 TIMESYS = 'TAI ' DATE-OBS= '2009-11-11 12:15:02.2Z' / start of integration CCDTEMP = -40.04811525 / degrees C FILENAME= '/data/gcam/55146/gimg-1250.fits' OBJECT = 'gimg-1250' DARKFILE= '/data/gcam/55145/gimg-0004.fits' FLATFILE= '/data/gcam/55146/gimg-1150.fits' FLATCART= 12 BEGX = 0 BEGY = 0 BINX = 1 BINY = 1 CRVAL1 = 0 / (output) Column pixel of Reference Pixel CRVAL2 = 0 / (output) Row pixel of Reference Pixel CRPIX1 = 0.5 / Column Pixel Coordinate of Reference CRPIX2 = 0.5 / Row Pixel Coordinate of Reference CTYPE1 = 'LINEAR ' / Type of projection CUNIT1 = 'PIXEL ' / Column unit CUNIT2 = 'PIXEL ' / Row unit END