FITS header changes October 2011

With a new software release of the GTC Control System that was implemented as of October 2011, a number of changes to the FITS headers took place. The following table provides a listing and description of these modifications.

KeywordExample entryComment
APPLYPREtrueReordering applied or not
ARCHID141289unique image number
CD1_16.15197399589511E-05for astrometric calibration, Not yet filled
CD1_2-3.47495197988005E-05for astrometric calibration, Not yet filled
CD2_1-3.47495197988005E-05for astrometric calibration, Not yet filled
CD2_2-6.15197399589511E-05for astrometric calibration, Not yet filled
CRPIX1462.5for astrometric calibration, Not yet filled
CRPIX2995.for astrometric calibration, Not yet filled
CRVAL1328.053157852889for astrometric calibration, Not yet filled
CRVAL22.41799503858528for astrometric calibration, Not yet filled
CTYPE1RA---TANfor astrometric calibration, Not yet filled
CTYPE2RA---TANfor astrometric calibration, Not yet filled
DATE-OBS2011-09-27T21:39:31:281Time when starts the first exposure
ELAPSHUT1.466Total elapsed time
EQUINOX2000.for astrometric calibration
EXTNAMEGTC FRAMEExtension written by GTC pipeline
FILSTATCOMMITED ?
GAIN0.95Gain (e-/adu)
GAINTYPEGAIN_x9_5Gain mode requested by user
GTCPRGIDGTC3-11BIACMEXProgram Id
HEIGHT2348Telescope height above sea level (m)
INSMODE Instrument Mode
LATITUDE28762000Telescope latitude (degrees), +28:45:43.2
LONGITUD17877639Telescope longitude (degrees), +17:52:39.5
LOOPSHIF0Charge Shuffling: Num times -numshifts- is repeated
NAXIS11024length of data axis 1
NAXIS22051length of data axis 2
OBSCLASSScienceObservation Class
OBSERVATORMObservatory (IRAF style)
ORIGFILEOct16_042857.fitsOriginal file name
RADESYSFK5for astrometric calibration, Not yet filled
RSPEED200Readout Speed Khz; now is a number (was SPEED_200)
SIMTYPE0Unknown
SIMVAL0Unknown
TELESCOPGTCTelescope
TFBANDW12.4312877655029filter bandwidth after offset correction, in Angstrom
TFIDTF_REDTunable Filter identifier
TFTEMP TF temperature
TFWAVEL9127.95339211425filter wavelength after offset correction