Suzaku Observation : 409026010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '409026010'          / Observation identification string
OBSERVER= 'KENJI HAMAGUCHI'    / 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  = 1.612798000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -5.968050000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             316.5996 / nominal position angle from north to DETY(deg)
MEAN_EA1=     161.279805850527 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     149.680525342002 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     133.400442023870 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2014-07-19T14:37:10' / Start date of observations
DATE-END= '2014-07-21T05:40:20' / End date of observations
TSTART  = 4.590965560000000E+08 / time start
TSTOP   = 4.592351180224000E+08 / time stop
TELAPSE = 1.385620223999619E+05 / elapsed time
ONTIME  = 5.674848240298033E+04 / On-source time
EXPOSURE= 5.674848240298033E+04 / Exposure time
MJD-OBS = 5.685761828916667E+04 / MJD of data start time
FILIN001= 'ae409026010xi0_0_3x3n066l_cl.evt.gz' / Input file name
SEQPNUM =                    3 / 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= 'ae409026010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae409026010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae409026010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae409026010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae409026010xi3_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 an extremely massive binary system whose strong winds produce a variety of high-energy X-ray and possibly gamma-ray emission. Earlier XMM-Newton, Suzaku and INTEGRAL observations found interesting features in the extremely hard X-ray band: i) a flat spectral component above 9 keV toward the flux maximum; ii) strong 15-20 keV emission during an occultation of the wind-wind colliding plasma; iii) stable power-law emission above 25 keV. These features are signs of the highest energy processes yet detected in any colliding wind binary. Broad band X-ray observations around periastron are essential to understanding those features. We therefore propose Suzaku observations at 5 key phases around the next periastron passage of eta Carinae in 2014.6.