Suzaku Observation : 401099010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '401099010'          / Observation identification string
OBSERVER= 'GERD R. PUEHLHOFER' / Principal Investigator
OBJECT  = 'HESS J1731-347'     / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             263.0208 / planned target R.A.(deg)
DEC_OBJ =             -34.7703 / planned target DEC.(deg)
RA_NOM  = 2.630179000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -3.477060000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              79.8005 / nominal position angle from north to DETY(deg)
MEAN_EA1=     263.017949807609 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     124.770629681109 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=      10.199544607099 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-02-23T18:44:13' / Start date of observations
DATE-END= '2007-02-24T17:50:15' / End date of observations
TSTART  = 2.255731697780442E+08 / time start
TSTOP   = 2.256545937661381E+08 / time stop
TELAPSE = 8.142398809397221E+04 / elapsed time
ONTIME  = 4.062686232858896E+04 / On-source time
EXPOSURE= 4.062686232858896E+04 / Exposure time
MJD-OBS = 5.415480131900514E+04 / MJD of data start time
FILIN001= 'ae401099010xi0_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= 'ae401099010xi0_0_5x5n000a_cl.evt.gz' / Input file name
FILIN003= 'ae401099010xi1_0_3x3n001b_cl.evt.gz' / Input file name
FILIN004= 'ae401099010xi1_0_5x5n001b_cl.evt.gz' / Input file name
FILIN005= 'ae401099010xi3_0_3x3n000a_cl.evt.gz' / Input file name
FILIN006= 'ae401099010xi3_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:

The hard (Gamma=2.0) TeV source HESS J1731-347 discovered in the H.E.S.S. Galactic plane survey has an intriguing possible counterpart seen in ROSAT survey data. The X-ray data show an unidentified, extended nebular structure with a hard spectrum, in close coincidence to the TeV source. It is plausible to assume that the same energetic particle population is responsible for the emission in both bands. Suzaku is optimally suited to establish the likely non-thermal nature of the X-ray spectrum and to search for the high-energy end of the emitting particle spectrum, which is likely visible in the HXD domain. The observations will help to clarify the nature of HESS J1731-347, which may be a new type of Galactic particle accelerator.