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Example 7: ASCA FITS Header

(The first two lines following are provided to help the reader determine column numbers. They are not part of FITS headers.)

00000000011111111111222222222233333333333444444444455555555556666666666777
12345678901234567890123456789012345678901234567890123456789012345678909012

XTENSION= 'BINTABLE'           / binary table extension
BITPIX  =                    8 / 8-bit bytes
NAXIS   =                    2 / 2-dimensional binary table
NAXIS1  =                   30 / width of table in bytes
NAXIS2  =                22990 / number of rows in the table
PCOUNT  =                    0 / size of special data area
GCOUNT  =                    1 / one data group (required keyword)
TFIELDS =                   11 / number of fields in each row

TTYPE1  = 'TIME    '           / arrival time of the X-ray
TFORM1  = '1D      '           / data format of the field: 8-byte DOUBLE
TUNIT1  = 's       '           / physical unit of field: seconds

TTYPE2  = 'PI      '           / pulse-height invariant energy of the event
TFORM2  = '1J      '           / data format: 4-byte INTEGER
TUNIT2  = 'channel '           / physical unit of field
TLMIN2  =                    0 / Minimum legal value of PI
TLMAX2  =                 4095 / Maximum legal value of PI

TTYPE3  = 'X       '           / projected X (RA) sky pixel coordinate
TFORM3  = '1I      '           / data format: 2-byte INTEGER
TUNIT3  = 'pixel   '           / physical unit of field
TLMIN3  =                    1 / minimum legal value for column 3
TLMAX3  =                 1280 / maximum legal value for column 3

TTYPE4  = 'Y       '           / projected Y (Dec) sky pixel coordinate
TFORM4  = '1I      '           / data format: 2-byte INTEGER
TUNIT4  = 'pixel   '           / physical unit of field
TLMIN4  =                    1 / minimum legal value for column 4
TLMAX4  =                 1280 / maximum legal value for column 4

TTYPE5  = 'RAWX    '           / raw X detector coordinate of the event
TFORM5  = '1I      '           / data format: 2-byte INTEGER
TUNIT5  = 'pixel   '           / physical unit of field
TLMIN5  =                    6 / minimum legal value for column 5
TLMAX5  =                  426 / maximum legal value for column 5

TTYPE6  = 'RAWY    '           / raw Y detector coordinate of the event
TFORM6  = '1I      '           / data format: 2-byte INTEGER
TUNIT6  = 'pixel   '           / physical unit of field
TLMIN6  =                    1 / minimum legal value for column 6
TLMAX6  =                  422 / maximum legal value for column 6

TTYPE7  = 'PHA     '           / Pulse-Height-Analyzer energy
TFORM7  = '1I      '           / data format: 2-byte INTEGER
TUNIT7  = 'channel '           / physical unit of field
TLMIN7  =                    0 / minimum legal value for column 7
TLMAX7  =                 4095 / maximum legal value for column 7

TTYPE8  = 'DETX    '           / corrected X detector coordinate
TFORM8  = '1I      '           / data format: 2-byte INTEGER
TUNIT8  = 'pixel   '           / physical unit of field
TLMIN8  =                    1 / minimum legal value for column 8
TLMAX8  =                 1280 / maximum legal value for column 8

TTYPE9  = 'DETY    '           / corrected Y detector coordinate
TFORM9  = '1I      '           / data format: 2-byte INTEGER
TUNIT9  = 'pixel   '           / physical unit of field
TLMIN9  =                    1 / minimum legal value for column 9
TLMAX9  =                 1280 / maximum legal value for column 9

TTYPE10 = 'GRADE   '           / event quality grade 
TFORM10 = '1I      '           / data format: 2-byte INTEGER
TUNIT10 = 'pixel   '           / physical unit of field
TLMIN10 =                    0 / minimum legal value for column 10
TLMAX10 =                    4 / maximum legal value for column 10

TTYPE11 = 'CCDID   '           / CCD number
TFORM11 = '1I      '           / data forma: 2-byte INTEGER
TLMIN11 =                    0 / minimum legal value for column 11
TLMAX11 =                    3 / maximum legal value for column 11

                 General Descriptive Keywords
EXTNAME = 'EVENTS  '           / Name of extension
HDUCLASS= 'OGIP    '           / format conforms to OGIP/GSFC conventions
HDUCLAS1= 'EVENTS  '           / Extension contains Events
INSTRUME= 'SIS1    '           / Instrument name
ORIGIN  = 'GSFC    '           / Origin of FITS file
OBJECT  = 'NGC 4151'           / Name of observed object
OBSERVER= 'I. N. Jones'        / Principal Investigator
TELESCOP= 'ASCA    '           / Telescope (mission) name
CREATOR = 'extractor10q'       / Program that created this FITS file
SEQNUM  =             71019020 / Sequential number from ODB
SEQPNUM =                  004 / Number of times sequence processed
PROCVER = 'A5.1.8  '           / Processing script version

                 Instrument mode keywords
MODAL_ID=                 1894 / Modal Configuration ID
BIT_RATE= 'HIGH    '           / Telemetry rate
OBS_MODE= 'POINTING'           / Observation mode
DATAMODE= 'BRIGHT2 '           / file generated by FAINT

                     Time Related Keywords
DATE    = '20/03/95'           / FITS file creation date (dd/mm/yy)
DATE-OBS= '05/12/93'           / date of observation start (dd/mm/yy)
TIME-OBS= '20:51:57'           / time of observation start (hh:mm:ss)
DATE-END= '06/12/93'           / date of observation end
TIME-END= '04:06:31'           / time of observation end
MJD-OBS =     4.9326869420E+04 / Modified Julian date of the data start time
MJDREF  =              48988.0 / MJD corresponding to SC clock start (1993.0)
TIMEREF = 'LOCAL   '           / Barycentric correction not applied to times
TIMESYS = '1993.0  '           / Time measured from 1993 Jan 1 00:00 UT
TIMEUNIT= 's       '           / unit for time related keywords: seconds
TSTART  =  2.92783178528423011303E+07 / time start
TSTOP   =  2.93043917384999990463E+07 / time stop
TELAPSE =  2.60738856576979160309E+04 / Elapsed time = TSTOP - TSTART
ONTIME  =  9.92793133954703807831E+03 / sum of the good time intervals
EXPOSURE=  9.92793133954703807831E+03 / Exposure
CLOCKAPP=                    F / Is mission time corrected for clock drift?
TASSIGN = 'SATELLITE'          / location of time assignment
TIMEDEL =     8.0000000000E+00 / time increment or time resolution of data
TIMEZERO=                  0.0 / offset to be applied to TIME column
ORBITBEG= '93120513'           / beginning orbit number
ORBITEND= '93120603'           / ending orbit number

              Position Related Keywords
RADECSYS= 'FK5     '           / World Coordinate System
EQUINOX =          2000.000000 / Equinox for coordinate system
RA_NOM  =               182.74 / Nominal RA
DEC_NOM =               39.429 / Nominal declination
RA_PNT  =           182.760681 / File average value of RA (degrees)
DEC_PNT =            39.434547 / File average value of DEC (degrees)
PA_PNT  =           237.685150 / File average value of ROLL (degrees)
RA_PNTE =             0.000556 / File standard deviation of RA (degrees)
DEC_PNTE=             0.000179 / File standard deviation of DEC (degrees)
PA_PNTE =             0.003630 / File standard deviation of ROLL (degrees)
TCRPX3  =       6.40500000E+02 / Sky X axis reference pixel
TCRPX4  =       6.40500000E+02 / Sky Y axis reference pixel
TCRVL3  =       1.82744003E+02 / Sky X coordinate at reference pixel (degrees)
TCRVL4  =       3.94291992E+01 / Sky Y coordinate at reference  pixel (degrees)
TCDLT3  =      -4.41999990E-04 / Sky X pixel scale (degrees/pixel)
TCDLT4  =       4.41999990E-04 / Sky Y pixel scale (degrees/pixel)
TCTYP3  = 'RA---TAN'           / Coordinate projection
TCTYP4  = 'DEC--TAN'           /  Coordinate projection
TCRPX8  =       6.40500000E+02 / Detector X ref pixel (center of address space)
TCRPX9  =       6.40500000E+02 / Detector Y ref pixel (center of address space)
TCRVL8  =       0.00000000E+00 / Detector X ref pixel value (pixels)
TCRVL9  =       0.00000000E+00 / Detector Y ref pixel value (pixels)
TCDLT8  =       2.70000007E-02 / Detector X pixel scale (mm/pixel)
TCDLT9  =       2.70000007E-02 / Detector Y pixel scale (mm/pixel)
OPTIC3  =       5.06579102E+02 / File mean optical axis X in sky coords (pixels)
OPTIC4  =       5.69040405E+02 / File mean optical axis Y in sky coords (pixels)
OPTIC8  =       6.18277771E+02 / Optical axis X in detector coords (pixels)
OPTIC9  =       7.73833313E+02 / Optical axis Y in detector coords (pixels)
FOV_X_MM=          23.00000000 / Detector X field of view (mm)
FOV_Y_MM=          23.00000000 / Detector Y field of view (mm)
END

(32 card images of blanks)