Suzaku Observation : 504056010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '504056010'          / Observation identification string
OBSERVER= 'HIRONORI MATSUMOTO' / Principal Investigator
OBJECT  = 'HESSJ1616_PSRJ1617' / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             244.3721 / planned target R.A.(deg)
DEC_OBJ =             -50.9203 / planned target DEC.(deg)
RA_NOM  = 2.443756000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -5.091750000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             270.0711 / nominal position angle from north to DETY(deg)
MEAN_EA1=     244.375625219539 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     140.917450843814 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     179.928939207737 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2009-08-16T02:39:57' / Start date of observations
DATE-END= '2009-08-17T19:59:14' / End date of observations
TSTART  = 3.037071850000000E+08 / time start
TSTOP   = 3.038543020000000E+08 / time stop
TELAPSE = 1.471170000000000E+05 / elapsed time
ONTIME  = 6.589707635778189E+04 / On-source time
EXPOSURE= 6.589707635778189E+04 / Exposure time
MJD-OBS = 5.505913019888889E+04 / MJD of data start time
FILIN001= 'ae504056010xi0_0_3x3n066l_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= 'ae504056010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae504056010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae504056010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae504056010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae504056010xi3_0_5x5n066a_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:

HESSJ1616-508 is one of the most energetic unidentified TeV object. Previously, we showed that there is no clear X-ray counterpart to this object with a Suzaku observation, and hence we argued that the object is a real dark particle accelerator. However, there is a young energetic pulsar PSRJ1617-5055 10 arcmin away from HESSJ1616, and another possibility has been proposed that HESSJ1616 is an offset pulsar wind nebula (PWN) driven by the pulsar. If this possibility is correct, a powerful X-ray PWN should be observed as HESSJ1825-137, but such PWN has not been reported. The lack of the detection may be due to small sensitivity of Chandra and XMM-Newton for a diffuse hard X-ray emission. We propose to observe PSRJ1617 to see if there is an extended PWN around this pulsar.