Suzaku Observation : 402050010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '402050010'          / Observation identification string
OBSERVER= 'RANDALL SMITH'      / Principal Investigator
OBJECT  = 'GX17+2  '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             274.0058 / planned target R.A.(deg)
DEC_OBJ =             -14.0364 / planned target DEC.(deg)
RA_NOM  = 2.740087000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -1.410060000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             269.7113 / nominal position angle from north to DETY(deg)
MEAN_EA1=     274.008735557508 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     104.100628098201 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     180.288714447117 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-09-19T06:39:19' / Start date of observations
DATE-END= '2007-09-19T20:30:15' / End date of observations
TSTART  = 2.435017933847305E+08 / time start
TSTOP   = 2.435489895187454E+08 / time stop
TELAPSE = 4.719613401490450E+04 / elapsed time
ONTIME  = 8.355120542675257E+03 / On-source time
EXPOSURE= 8.355120542675257E+03 / Exposure time
MJD-OBS = 5.436230853667512E+04 / MJD of data start time
FILIN001= 'ae402050010xi0_0_2x2b104a_cl.evt.gz' / Input file name
SEQPNUM =                    4 / 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= 'ae402050010xi0_0_3x3b104a_cl.evt.gz' / Input file name
FILIN003= 'ae402050010xi1_0_3x3b111b_cl.evt.gz' / Input file name
FILIN004= 'ae402050010xi3_0_2x2b106a_cl.evt.gz' / Input file name
FILIN005= 'ae402050010xi3_0_3x3b106a_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:

Z sources are bright low-mass X-ray binaries with variable spectra that describe a characteristic "Z" shape in an X-ray color-color plot. The forces driving the spectral shape and variability of the Z sources are not well understood, as there are few detectors with the necessary capabilities. GX17+2 is a Sco-type Z sources with an unusual time-varying hard X-ray tail whose origin is uncertain. Bright X-ray sources also illuminate the interstellar medium. Highly absorbed X-ray sources show halos due to dust scattering as well as absorption features. These will allow us to place constraints on interstellar dust and gas models. Suzaku can address all of these issues with simultaneous observations of the hard X-ray continuum and the dust-scattered X-ray halo.