Suzaku Observation : 403072010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '403072010'          / Observation identification string
OBSERVER= 'LAURENCE BOIRIN'    / Principal Investigator
OBJECT  = 'XTE J1759-220'      / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             269.9417 / planned target R.A.(deg)
DEC_OBJ =             -22.0150 / planned target DEC.(deg)
RA_NOM  = 2.699393000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -2.201180000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              86.4790 / nominal position angle from north to DETY(deg)
MEAN_EA1=     269.939269845368 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     112.011773799639 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=       3.521033519374 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2008-04-10T12:27:11' / Start date of observations
DATE-END= '2008-04-11T15:30:19' / End date of observations
TSTART  = 2.611487720000000E+08 / time start
TSTOP   = 2.612430037115785E+08 / time stop
TELAPSE = 9.423171157848835E+04 / elapsed time
ONTIME  = 4.942493602007627E+04 / On-source time
EXPOSURE= 4.942493602007627E+04 / Exposure time
MJD-OBS = 5.456655597435185E+04 / MJD of data start time
FILIN001= 'ae403072010xi0_0_3x3n090a_cl.evt.gz' / Input file name
SEQPNUM =                    2 / 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= 'ae403072010xi0_0_5x5n090a_cl.evt.gz' / Input file name
FILIN003= 'ae403072010xi1_0_3x3n091b_cl.evt.gz' / Input file name
FILIN004= 'ae403072010xi1_0_5x5n091b_cl.evt.gz' / Input file name
FILIN005= 'ae403072010xi3_0_3x3n092a_cl.evt.gz' / Input file name
FILIN006= 'ae403072010xi3_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:

Dipping low-mass X-ray binaries (LMXBs), a subclass of LMXBs that are viewed close to the disk plane, provide us with a rare opportunity to probe the structure of accretion disks. This was nicely illustrated with the discovery of Fe XXV and Fe XXVI absorption lines in all the dipping LMXBs observed with XMM and Chandra. It revealed the existence of a highly-ionized atmosphere above the disk which is likely present in any LMXB but only detectable in the ones seen close to edge-on. We propose to observe two recently discovered dipping binaries with Suzaku, to constrain the basic astrophysical properties (orbital period, distance, variability, high energy cutoff, etc) of these yet poorly observed sources, and to further investigate the ionized atmosphere in X-ray binaries in general.