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Table 1 shows the header of the RAW version of one of the CPC_1711S77 images.

 

Table 1. Sample FITS header
 


SIMPLE  =                    T / SIMPLE FITS FORMAT ( HEADER VERSION D1 850214)
BITPIX  =                   16 / PIXEL VALUES: 2-BYTE TWOS-COMPLEMENT INTEGERS
NAXIS   =                    3 / NUMBER OF AXES IN THE DATA ARRAY
NAXIS1  =                   42 / NUMBER OF PIXELS/ROW  (RA) (COLUMNS)
NAXIS2  =                   57 / NUMBER OF ROWS        (DEC)
NAXIS3  =                    2 / NUMBER OF WAVELENGTHS (LAMBDA)
CTYPE1  = 'RA      '           /
CRVAL1  =          2.57917E+02 / COORDINATE TRANSFORMATIONS:
CRPIX1  =          2.50000E+01 /  X OF PIXEL = ( COLUMN - CRPIX1 )*CDELT1
CDELT1  =         -5.55556E-03 /  Y OF PIXEL = ( ROW - CRPIX2 )*CDELT2
CTYPE2  = 'DEC     '           / TRANSFORMATIONS BETWEEN (X,Y) AND (RA,DEC):
CRVAL2  =         -7.78167E+01 /  APPROXIMATE (FAR FROM THE CELESTIAL POLES):
CRPIX2  =          3.30000E+01 /   X = (CRVAL1 - RA)*COS(CRVAL2)
CDELT2  =          5.55556E-03 /   Y = DEC - CRVAL2
CTYPE3  = 'LAMBDA  '           /  EXACT:
CRPIX3  =          1.00000E+00 /   X = SIN(CRVAL1 - RA)*COS(DEC)
CRVAL3  =          5.00000E-05 /   Y = ( SIN(DEC)*COS(CRVAL2) ) -
CDELT3  =          5.00000E-05 /       ( COS(DEC)*SIN(CRVAL2)*COS(RA-CRVAL1) )
BSCALE  =          2.53505E-03 / DATA SCALE FACTOR (REAL=TAPE*BSCALE+BZERO)
BZERO   =          9.34695E+01 / DATA OFFSET VALUE
BUNIT   = 'MJY / SR'           / BRIGHTNESS UNITS
BLANK   =               -32767 / TAPE PIXEL VALUE ASSIGNED TO UNDEFINED VALUE
DATE-OBS= '29/03/83'           / DATE OF OBSERVATION       (JE 1983.241766)
TIME-OBS= '13:18:13'           / TIME OF OBSERVATION
INSTRUME= 'IRAS-CPC'           / INSTRUMENT USED IN OBSERVATION
ORIGIN  = 'ROG-GRON'           / NAME OF INSTITUTE THAT PRODUCED THIS FILE
OBJECT  = '             '      / NAME OF THE OBSERVED OBJECT
COMMENT  IRAS CPC RAW IMAGE :NO DEGLITCHING, NO GAINCORRECTION APPLIED.
COMMENT
COMMENT  START OF SCAN AT (COL,ROW)=(13,16) TO (COL,ROW)=( 4,42) IN 10 SECONDS.
HISTORY  IMTOFTD1 850308 < RAWRGDD1 850126 < GAINCRD3 850126 < CPCATTD3 850126
HISTORY  < DEGLTCD1 840920
COMMENT  THIS TAPE CONTAINS CONFIDENTIAL DATA
COMMENT  PUBLICATIONS BEFORE DEC 1985 ARE RESTRICTED TO IRAS PROJECT SCIENTISTS
DATE    = '08/03/85'           / CREATION DATE OF THIS FITS TAPE FILE
END