Suzaku Observation : 802063010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '802063010'          / Observation identification string
OBSERVER= 'TAKASHI OKAJIMA'    / Principal Investigator
OBJECT  = 'ABEL 754'           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             137.2088 / planned target R.A.(deg)
DEC_OBJ =              -9.6367 / planned target DEC.(deg)
RA_NOM  = 1.372113000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -9.636100000000001E+00 / Declination of target (deci. deg)
PA_NOM  =             295.1878 / nominal position angle from north to DETY(deg)
MEAN_EA1=     137.211252573419 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      99.636069174065 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     154.812166926328 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-05-29T17:52:12' / Start date of observations
DATE-END= '2007-06-01T10:47:25' / End date of observations
TSTART  = 2.337786350000000E+08 / time start
TSTOP   = 2.340100246541318E+08 / time stop
TELAPSE = 2.313896541317999E+05 / elapsed time
ONTIME  = 1.089859451969564E+05 / On-source time
EXPOSURE= 1.089859451969564E+05 / Exposure time
MJD-OBS = 5.424977198129630E+04 / MJD of data start time
FILIN001= 'ae802063010xi0_0_3x3n066a_cl.evt.gz' / Input file name
SEQPNUM =                    3 / 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= 'ae802063010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae802063010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae802063010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae802063010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae802063010xi3_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:

We propose a 100 ksec observation of Abell 754 and a 50 ksec observation of Triangulum Australis, in order to measure the spectral shape and flux of possible nonthermal emission from clusters of galaxies. They are bright clusters of galaxies in the BAT all sky survey sample, which is crucial for making good spectral measurements by the HXD. And their spectra have a significant hard excess (power-law component). We intend to constrain the power-law photon index of the nonthermal emission for the first time and to determine the size of hard X-ray emitting region by using both of the HXD and Swift BAT data. We are aiming to test the origin of the hard flux and see whether it originates from either diffuse inverse Compton scattering by relativistic cosmic-ray electrons or an AGN.