Suzaku Observation : 503053010

HTTP dir for public data including pipe-line products
SUZAKU MASTER for master database
UDON2 to quickly extract spectrum and light-curve
JUDO2 to show the pointing position and compare with other data

Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '503053010'          / Observation identification string
OBSERVER= 'YUTAKA FUJITA'      / Principal Investigator
OBJECT  = 'WESTERLUND 2'       / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             155.9958 / planned target R.A.(deg)
DEC_OBJ =             -57.7444 / planned target DEC.(deg)
RA_NOM  = 1.560088000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -5.774480000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             343.7602 / nominal position angle from north to DETY(deg)
MEAN_EA1=     156.008771297811 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     147.744820788936 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     106.239765353965 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2008-08-09T15:39:55' / Start date of observations
DATE-END= '2008-08-11T07:52:16' / End date of observations
TSTART  = 2.716125264553022E+08 / time start
TSTOP   = 2.717560684314396E+08 / time stop
TELAPSE = 1.435419761373401E+05 / elapsed time
ONTIME  = 7.366999679684639E+04 / On-source time
EXPOSURE= 7.366999679684639E+04 / Exposure time
MJD-OBS = 5.468766424351044E+04 / MJD of data start time
FILIN001= 'ae503053010xi0_0_3x3n066a_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= 'ae503053010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae503053010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae503053010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae503053010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae503053010xi3_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:

Although young open clusters with many massive stars have been recognized as gamma-ray sources, the emission mechanism of the gamma-ray is hardly known. We propose a Suzaku observation of an open cluster Westerlund 2 (RCW 49), from which gamma-ray emission has been detected with H.E.S.S. We observe this cluster to detect X-ray nonthermal emission from open clusters with TeV gamma-ray emission for the first time. We try to find out whether the emission comes from electrons or protons, and discuss the particle acceleration in open clusters.