Suzaku Observation : 406008010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '406008010'          / Observation identification string
OBSERVER= 'SOKI SAKURAI'       / Principal Investigator
OBJECT  = '4U1812-12'          / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             273.8000 / planned target R.A.(deg)
DEC_OBJ =             -12.0833 / planned target DEC.(deg)
RA_NOM  = 2.738053000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -1.209350000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             267.1590 / nominal position angle from north to DETY(deg)
MEAN_EA1=     273.805253046518 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     102.093501842872 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     182.841031637236 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2011-10-04T03:21:39' / Start date of observations
DATE-END= '2011-10-05T22:00:20' / End date of observations
TSTART  = 3.710137980000000E+08 / time start
TSTOP   = 3.711649110000000E+08 / time stop
TELAPSE = 1.511130000000000E+05 / elapsed time
ONTIME  = 6.201422719275951E+04 / On-source time
EXPOSURE= 6.201422719275951E+04 / Exposure time
MJD-OBS = 5.583814192342592E+04 / MJD of data start time
FILIN001= 'ae406008010xi0_0_3x3n090l_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= 'ae406008010xi0_0_5x5n090l_cl.evt.gz' / Input file name
FILIN003= 'ae406008010xi1_0_3x3n131b_cl.evt.gz' / Input file name
FILIN004= 'ae406008010xi1_0_5x5n131b_cl.evt.gz' / Input file name
FILIN005= 'ae406008010xi3_0_3x3n092a_cl.evt.gz' / Input file name
FILIN006= 'ae406008010xi3_0_5x5n092a_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:

Low-Mass X-ray binaries (LMXBs) are known to have soft and hard states, like black hole binaries. Through an analysis of archival Suzaku data of the LMXB Aql X-1 in the hard state, we obtained a clear picture of its accretion geometry; a truncated accretion disk, and a hot corona that Comptonize blackbody photons from the neutron star surface. In order to investigate whether this picture also applies to other LMXBs in the low/hard state, and to better constrain the accretion geometry in comparison with those of black hole binaries, we propose a 60 ksec Suzaku observation of the LMXB 4U 1812-12. This is a valuable object,which is known to reside almost always in the low/hard state.