FITS Header for RASS_SXRB_R5.fits
Primary Header
SIMPLE = T / Written by IDL: Mon Jun 22 23:32:09 2015
BITPIX = 16 / Number of bits per data pixel
NAXIS = 0 / Number of data axes
EXTEND = T / FITS data may contain extensions
DATE = '2015-06-22' / Creation date (CCYY-MM-DD) of FITS header
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode 2001A&A...376..359H
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode 2001A&A...376..359H
TELESCOP= 'ROSAT ' / Mission name
INSTRUME= 'PSPCC ' / Instrument name
FILTER = 'NONE ' / Filter id: NONE or BORON
OBS_MODE= 'SCAN ' / Obs mode: POINTING, SLEW, or SCAN
EQUINOX = 2000.00 / Equinox
RADECSYS= 'FK5 ' / Equatorial system reference, WCS
MJDREFI = 48043 / MJD integer SC clock start
MJDREFF = 0.87974537 / MJD fraction SC clock start
ZERODATE= '01/06/90' / UT date of SC start (DD/MM/YY)
ZEROTIME= '21:06:50' / UT time of SC start (HH:MM:SS)
DATE-OBS= '11/06/90' / UT date of obs start (DD/MM/YY)
TIME-OBS= '00:00:00.000' / UT time of obs start (HH:MM:SS)
DATE_END= '12/08/91' / UT date of obs end (DD/MM/YY)
TIME_END= '23:59:59.999' / UT time of obs end (HH:MM:SS)
LIVETIME= 1.00000 / Live time
DTCOR = 1.00000 / Dead time correction factor
ONTIME = 1.00000 / On time
HISTORY Info from original processing:
HISTORY
HISTORY These maps of the soft X-ray diffuse background are provided by the
HISTORY Max Planck Institute for Extraterrestrial Physics, Garching, Germany.
HISTORY They have been derived from the ROSAT all-sky survey using data from
HISTORY the X-ray Telescope collected by the Position Sensitive Proportional
HISTORY Counters. Details of the survey and data reduction can be found in
HISTORY Snowden et al. 1997, Astrophysical Journal, 485, 125 and references
HISTORY therein.
HISTORY
HISTORY The maps come as ordered pairs of count rate and count-rate uncertainty
HISTORY images in six energy bands in six projections. The projection used is
HISTORY the Zenith Equal Area in Galactic coordinates. The projection centers
HISTORY are at l,b = 0,90 0,-90 0,0 90,0 180,0 and 270,0. The pulse-
HISTORY height invariant (PI) channel bands are:
HISTORY R1=8-19, R2=20-41, R4=52-69, R5=70-90, R6=91-131, R7=132-201
HISTORY
HISTORY The units (Snowdens, for historical reasons) of the count-rate and
HISTORY uncertainty maps are 10^-6 counts s^-1 arcmin^-2. This is a
HISTORY detector-specific unit normalized to the on-axis effective area of
HISTORY the detectors. The data have been corrected for the particle
HISTORY background, scattered solar X-ray background, and long-term
HISTORY enhancement background, and corrected for exposure.
HISTORY
HISTORY COORDINATE CONVENTION
HISTORY This image uses the convention in which (1,1) is the
HISTORY coordinate of the center of the pixel in the lower
HISTORY left-hand corner.
HISTORY
HISTORY Converted to HEALPix by RO2HP v0.7
HISTORY ZEA panel copied to oversampled HEALPix grid
HISTORY Individual panels averaged onto final HEALPix grid
HISTORY then merged by direct averaging
END
Extension Header
XTENSION= 'BINTABLE' /Written by IDL: Mon Jun 22 23:32:09 2015
BITPIX = 8 /
NAXIS = 2 /Binary table
NAXIS1 = 8192 /Number of bytes per row
NAXIS2 = 3072 /Number of rows
PCOUNT = 0 /Random parameter count
GCOUNT = 1 /Group count
TFIELDS = 2 /Number of columns
TFORM1 = '1024E ' /Real*4 (floating point)
TFORM2 = '1024E ' /Real*4 (floating point)
TTYPE1 = 'COUNT_RATE' /
TUNIT1 = '1e-6cts/s/arcmin^2' /
TTYPE2 = 'UNCERTAINTY' /
TUNIT2 = '1e-6cts/s/arcmin^2' /
HISTORY g000m90r5b120pm.fits created on 10/08/97. PI channel range: 70: 90
PIXTYPE = 'HEALPIX ' / HEALPIX pixelisation
ORDERING= 'NESTED ' / Pixel ordering scheme, either RING or NESTED
NSIDE = 512 / Healpix resolution parameter
NPIX = 3145728 / Total number of pixels
OBJECT = 'FULLSKY ' / Sky coverage, either FULLSKY or PARTIAL
FIRSTPIX= 0 / First pixel # (0 based)
LASTPIX = 3145727 / Last pixel # (zero based)
INDXSCHM= 'IMPLICIT' / indexing : IMPLICIT or EXPLICIT
GRAIN = 0 / GRAIN = 0: No index,
COMMENT GRAIN =1: 1 pixel index for each pixel,
COMMENT GRAIN >1: 1 pixel index for Grain consecutive pixels
BAD_DATA= -1.63750E+30 / Sentinel value given to bad pixels
COORDSYS= 'G ' / Pixelization coordinate system
COMMENT G = Galactic, E = ecliptic, C = celestial = equatorial
END