FITS Headers
FIRAS_CHI_SQUARED_HIF4.FITS
Primary Header
SIMPLE = T / file does conform to FITS standard
BITPIX = 32 / number of bits per data pixel
NAXIS = 0 / number of data axes
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and
COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365.
COMMENT Contact the NASA Science Office of Standards and Technology for the
COMMENT FITS Definition document #100 and other FITS information.
DATE = '24/09/97' / FITS file creation date (dd/mm/yy)
ORIGIN = 'CDAC ' / Cosmology Data Analysis Center
TELESCOP= 'COBE ' / COsmic Background Explorer satellite
INSTRUME= 'FIRAS ' / COBE instrument [DIRBE, DMR, FIRAS]
OBJECT = 'ALL-SKY ' / part of sky given [ALL-SKY, GAL-SLICE]
PRODUCT = 'CHI-SQ ' / Chi-squared
EQUINOX = 2000.0 / equinox of coords in following tables
COMMENT
REFERENC= 'For additional information, please refer to the' /
REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' /
REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' /
REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' /
REFERENC= 'available in electronic form from the NSSDC.' /
COMMENT
COMMENT COBE specific keywords
DATE-BEG= '24/11/89' / date of initial data represented (dd/mm/yy)
DATE-END= '21/09/90' / date of final data represented (dd/mm/yy)
PIXRESOL= 6 / Quad tree pixel resolution [6, 9]
COMMENT
COMMENT FIRAS specific keywords
CHANSCAN= 'HIF4 ' / Field indicating combination of data from
COMMENT / various channels and mirror transport
COMMENT / mechanism scan modes. LOWF is a combination
COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS,
COMMENT / LLFS, and LLFL data. HIGH is a combination o
COMMENT f
COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS,
COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4
COMMENT / divide the HIGH data into three frequency
COMMENT / bands, as indicated by the NU_ZERO and
COMMENT / NUM_FREQ fields. HRES is a combination of th
COMMENT e
COMMENT / high resolution RLLF and LLLF data. For the
COMMENT / uncombined channel/scan mode labels, the firs
COMMENT t
COMMENT / two characters of the label indicate the
COMMENT / channel, the first being the instrument side:
COMMENT / right (R) or left (L); and the second being
COMMENT / the frequency: high (H) or low (L). The
COMMENT / third and fourth characters indicate the scan
COMMENT / mode, the third being the scan length: short
COMMENT / (S) or long (L); and the fourth being the sca
COMMENT n
COMMENT / speed: slow (S) or fast (F). In addition,
COMMENT / the scan mode may take the following values
COMMENT / for low frequency data only (channel = RL or
COMMENT / LL):
COMMENT / FS: decimated SF data;
COMMENT / FL: truncated LF data.
MODLLABL= 'PASS4 ' / FIRAS calibration model solution label
MISS_SEG= 'ENTIRE_MISSION' / FIRAS segment of mission represented
END
Extension Header 2
XTENSION= 'BINTABLE' / Extension type is Binary Table
BITPIX = 8 / Binary data
NAXIS = 2 / Data are in a table
NAXIS1 = 24 / Number of 8 bit bytes in each row
NAXIS2 = 6067 / Number of rows
PCOUNT = 0 / Number of bytes of data following table
GCOUNT = 1 / Group count (always 1 for bintable extensions)
TFIELDS = 6 / Number of fields (columns) in the table
COMMENT
COMMENT
COMMENT FIRAS Chi-Squared
COMMENT Project Dataset Record Structure
COMMENT
COMMENT
COMMENT FIRAS pixel number (resolution 6)
TFORM1 = '1J ' /
TTYPE1 = 'PIXEL ' / entire fieldname = PIXEL
TUNIT1 = ' ' /
COMMENT Galactic longitude, in deg (0 -> 360)
TFORM2 = '1E ' /
TTYPE2 = 'GAL_LON ' / entire fieldname = GAL_LON
TUNIT2 = 'deg ' /
COMMENT Galactic latitude, in deg (-90 -> 90)
TFORM3 = '1E ' /
TTYPE3 = 'GAL_LAT ' / entire fieldname = GAL_LAT
TUNIT3 = 'deg ' /
COMMENT Pixel weight
TFORM4 = '1E ' /
TTYPE4 = 'WEIGHT ' / entire fieldname = WEIGHT
TUNIT4 = ' ' /
COMMENT Degrees of freedom
TFORM5 = '1J ' /
TTYPE5 = 'DOF ' / entire fieldname = DOF
TUNIT5 = ' ' /
COMMENT Chi-squared
TFORM6 = '1E ' /
TTYPE6 = 'COMB_CSQ' / entire fieldname = COMB_CSQ
TUNIT6 = ' ' /
COMMENT
END