Suzaku Observation : 801054010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '801054010'          / Observation identification string
OBSERVER= 'YASUSHI FUKAZAWA'   / Principal Investigator
OBJECT  = 'NGC3923 '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             177.7575 / planned target R.A.(deg)
DEC_OBJ =             -28.8061 / planned target DEC.(deg)
RA_NOM  = 1.777599000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -2.880470000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             293.1988 / nominal position angle from north to DETY(deg)
MEAN_EA1=     177.759933046798 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     118.804725075762 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     156.801155069815 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2006-06-13T20:14:01' / Start date of observations
DATE-END= '2006-06-16T17:30:14' / End date of observations
TSTART  = 2.035476410000000E+08 / time start
TSTOP   = 2.037941960143044E+08 / time stop
TELAPSE = 2.465550143044293E+05 / elapsed time
ONTIME  = 1.158280152985156E+05 / On-source time
EXPOSURE= 1.158280152985156E+05 / Exposure time
MJD-OBS = 5.389987621740741E+04 / MJD of data start time
FILIN001= 'ae801054010xi0_0_3x3n000a_cl.evt.gz' / Input file name
SEQPNUM =                    3 / Number of times this dataset processed
PROCVER = '3.0.22.43'          / Processing script version
MK1STVER= 'mk1stfits20120530'  / Version of mk1stfits used
SOFTVER = 'Hea_08Feb2016_V6.18_Suzaku_14Nov2013_V22' / Version of HEADAS used
CALDBVER= 'hxd20110913_xis20151005_xrt20110630_xrs20060410' / Version of CALDB u
FILIN002= 'ae801054010xi0_0_5x5n000a_cl.evt.gz' / Input file name
FILIN003= 'ae801054010xi1_0_3x3n001b_cl.evt.gz' / Input file name
FILIN004= 'ae801054010xi1_0_5x5n001b_cl.evt.gz' / Input file name
FILIN005= 'ae801054010xi2_0_3x3n000a_cl.evt.gz' / Input file name
FILIN006= 'ae801054010xi2_0_5x5n000a_cl.evt.gz' / Input file name
FILIN007= 'ae801054010xi3_0_3x3n000a_cl.evt.gz' / Input file name
FILIN008= 'ae801054010xi3_0_5x5n000a_cl.evt.gz' / Input file name
COMMENT -------------------------
COMMENT BITPIX compressed from 32 to 8.
COMMENT Pixel values greater than 255 was set to 255.
COMMENT This file was made for JUDO-Suzaku.
COMMENT -------------------------
COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy

Abstract:

We propose to observe an isolated elliptical galaxy NGC3923, to meaasure a dark matter distribution. The large effective area and stable low background of XIS enable us to measure a faint extended X-ray emission such as the periphery of elliptical galaxies more accurately than ever. Since X-ray bright elliptical galaxies have been found to be surrounded by group-scale emission, X-ray faint elliptical galaxies are the best to investigate the dark matter associated with the galaxy itself. The dark matter around galaxies is a key to resolve the problem of why X-ray bright and faint elliptical galaxies exist. The oxygen abundance distribution is also useful to probe the above issue.