Suzaku Observation : 402030010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '402030010'          / Observation identification string
OBSERVER= 'SHUNJI KITAMOTO'    / Principal Investigator
OBJECT  = 'CYG OB2 ASSOCIATION' / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             308.2000 / planned target R.A.(deg)
DEC_OBJ =              41.3000 / planned target DEC.(deg)
RA_NOM  = 3.082175000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 4.129350000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             220.3949 / nominal position angle from north to DETY(deg)
MEAN_EA1=     308.217460509193 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      48.706486318130 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     229.605149897212 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-12-18T22:02:43' / Start date of observations
DATE-END= '2007-12-19T20:15:14' / End date of observations
TSTART  = 2.513320800000000E+08 / time start
TSTOP   = 2.514091508451019E+08 / time stop
TELAPSE = 7.707084510192275E+04 / elapsed time
ONTIME  = 4.111474391612411E+04 / On-source time
EXPOSURE= 4.111474391612411E+04 / Exposure time
MJD-OBS = 5.445293685398148E+04 / MJD of data start time
FILIN001= 'ae402030010xi0_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= 'ae402030010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae402030010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae402030010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae402030010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae402030010xi3_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:

Cygnus OB2 Association (hereafter Cyg OB2) is a candidate of a counterpart of a TeV gamma-ray source; TeV J 2032+4130 discovered by HEGRA. Cyg OB2 is a peculiar cluster of early type stars including extremely high mass stars (>100 solar mass). Some stars in the cluster are bright in an X-ray range, and their spectra show unusually high temperature and also their winds are violently strong. TeV J 2032+4130 lies about 20 f apart from the stars and no obvious X-ray counterpart has been detected in its error circle. We propose to reveal a hidden link between the stars and TeV J2032+4130 by looking for a non-thermal diffuse X-ray emission between them with Suzaku. Also we search for possible non-thermal properties of the stars in high quality spectra obtained with Suzaku.