XMM RGS
The data extension for an XMM RGS spectrum showing the use of vector
AREASCAL. Note that COUNTS and AREASCAL are 8-byte DOUBLEs. This is
more than required and software is not expected to retain the 8-byte
precision.
XTENSION= 'BINTABLE' / binary table extension
BITPIX = 8 / 8-bit bytes
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = 20 / width of table in bytes
NAXIS2 = 3400 / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 4 / number of fields in each row
TTYPE1 = 'CHANNEL ' / label for field 1
TFORM1 = 'I ' / data format of field: 2-byte INTEGER
TTYPE2 = 'QUALITY ' / label for field 4
TFORM2 = 'I ' / data format of field: 2-byte INTEGER
TTYPE3 = 'COUNTS ' / label for field 5
TFORM3 = '1D ' / data format of field: 8-byte DOUBLE
TTYPE4 = 'AREASCAL' / label for field 6
TFORM4 = '1D ' / data format of field: 8-byte DOUBLE
EXTNAME = 'SPECTRUM' / name of this binary table extension
HDUCLASS= 'OGIP '
HDUCLAS1= 'SPECTRUM'
HDUCLAS2= 'TOTAL '
HDUCLAS3= 'RATE '
HDUVERS = '1.2.1 '
HDUVERS1= '1.2.1 '
DETCHANS= 3400
CHANTYPE= 'PI '
POISSERR= T
SYS_ERR = 0 / no systematic error specified
GROUPING= 0
BACKSCAL= 1.00000000000000E+00
CORRSCAL= 1.00000000000000E+00
BACKFILE= 'none '
CORRFILE= 'none '
ANCRFILE= 'none '
FILTER = 'none '
TELESCOP= 'XMM ' / XMM mission
INSTRUME= 'RGS1 ' / RGS Instrument
EXPOSURE= 3.28260546875000E+04 / total effective integration time
SOURCEID= 1
RFLORDER= 1
BETA_REF= 3.57852391898632E-02 / midpoint of bin at origin
BETA_WID= 1.20799995784182E-05 / uniform bin width
LINE_SEP= 1.54894550781250E+04 / grating line spacing (Angstroms)
ALPHANOM= 2.75247208774090E-02 / nominal incidence angle (radians)
RGS_DISP= 5.15623800456524E-02 / source dispersion angle (arcmin)
RGS_XDSP= -2.04170688986778E-01 / source cross-dispersion angle (arcmin)
TLMIN1 = 0
TLMAX1 = 3399
END
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Last modified: Thursday, 21-Oct-2021 12:50:38 EDT
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