Suzaku Observation : 408018010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '408018010'          / Observation identification string
OBSERVER= 'TAKAYUKI YUASA'     / Principal Investigator
OBJECT  = 'ETA CARINAE'        / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             161.2650 / planned target R.A.(deg)
DEC_OBJ =             -59.6845 / planned target DEC.(deg)
RA_NOM  = 1.611825000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -5.971100000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             329.3001 / nominal position angle from north to DETY(deg)
MEAN_EA1=     161.182507443236 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     149.711004324345 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     120.699853578438 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2013-07-03T04:22:16' / Start date of observations
DATE-END= '2013-07-06T01:00:06' / End date of observations
TSTART  = 4.261424280000000E+08 / time start
TSTOP   = 4.263864053339773E+08 / time stop
TELAPSE = 2.439773339772820E+05 / elapsed time
ONTIME  = 9.752395045167208E+04 / On-source time
EXPOSURE= 9.752395045167208E+04 / Exposure time
MJD-OBS = 5.647620477064815E+04 / MJD of data start time
FILIN001= 'ae408018010xi0_0_3x3n066l_cl.evt.gz' / Input file name
SEQPNUM =                    2 / Number of times this dataset processed
PROCVER = '3.0.22.44'          / Processing script version
MK1STVER= 'mk1stfits20120530'  / Version of mk1stfits used
SOFTVER = 'Hea_08Feb2016_V6.18_Suzaku_14Nov2013_V22' / Version of HEADAS used
CALDBVER= 'hxd20110913_xis20160607_xrt20110630_xrs20060410' / Version of CALDB u
FILIN002= 'ae408018010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae408018010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae408018010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae408018010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae408018010xi3_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:

Eta Carinae is a binary system containing two very massive main sequence stars orbiting with a period of 5.5 years. As reported by Sekiguchi et al. 2009 and Reitberger et al. 2012 based on Suzaku and Fermi data respectively, the system shows intense non-thermal emission extending from 20 keV to 200 GeV. Although detailed mechanism of this non-thermal emission has been clarified yet, it is now obvious that electrons and highly probably protons are accelerated to high energies by the collision of stellar winds. The aim of the present observation is to measure the spectral shape and flux of the non-thermal hard X-ray tail with the HXD, and compare with previous Suzaku observations. Based on a time variability (or non-variability), we examine proposed acceleration and emission mechanisms.