Suzaku Observation : 807062010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '807062010'          / Observation identification string
OBSERVER= 'ERIC D. MILLER'     / Principal Investigator
OBJECT  = 'SDSS J1431+0047'    / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             217.7607 / planned target R.A.(deg)
DEC_OBJ =               0.7939 / planned target DEC.(deg)
RA_NOM  = 2.177608000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 7.880000000000000E-01 / Declination of target (deci. deg)
PA_NOM  =             287.7594 / nominal position angle from north to DETY(deg)
MEAN_EA1=     217.760816857682 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      89.212035162686 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     162.240562360723 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2012-08-01T23:39:27' / Start date of observations
DATE-END= '2012-08-02T10:54:18' / End date of observations
TSTART  = 3.971796580000000E+08 / time start
TSTOP   = 3.972200456881902E+08 / time stop
TELAPSE = 4.038768819022179E+04 / elapsed time
ONTIME  = 2.237099960291386E+04 / On-source time
EXPOSURE= 2.237099960291386E+04 / Exposure time
MJD-OBS = 5.614098752527778E+04 / MJD of data start time
FILIN001= 'ae807062010xi0_0_3x3n066l_cl.evt.gz' / Input file name
SEQPNUM =                    2 / Number of times this dataset processed
PROCVER = '3.0.22.44'          / Processing script version
MK1STVER= 'mk1stfits20120530'  / Version of mk1stfits used
SOFTVER = 'Hea_08Feb2016_V6.18_Suzaku_14Nov2013_V22' / Version of HEADAS used
CALDBVER= 'hxd20110913_xis20160607_xrt20110630_xrs20060410' / Version of CALDB u
FILIN002= 'ae807062010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN003= 'ae807062010xi3_0_3x3n066a_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:

Fossil groups (FGs) are systems dominated by a single large galaxy with a cluster-scale X-ray halo. They are thought to be old, isolated galaxy groups in which the large galaxies have coalesced through dynamical friction, but recent studies reveal a more complicated picture. We propose Suzaku observations of 5 optically selected FG candidates. These targets will extend our previous survey, which identified 12 FGs; when combined with 5 FG candidates approved for the current Chandra cycle, this will create the largest uniformly-selected sample of real FGs. The L_X and T_X measured will be used with optical spectroscopy to extend FG scaling relations to low mass, and to plan deeper X-ray spectroscopic follow-up to constrain the formation epoch and evolution of these puzzling systems.