Suzaku Observation : 802033010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '802033010'          / Observation identification string
OBSERVER= 'KAZUHIRO NAKAZAWA'  / Principal Investigator
OBJECT  = 'ABELL 2744'         / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =               3.5813 / planned target R.A.(deg)
DEC_OBJ =             -30.3886 / planned target DEC.(deg)
RA_NOM  = 3.539700000000000E+00 / Right Ascension of target (deci. deg)
DEC_NOM = -3.034460000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              53.4742 / nominal position angle from north to DETY(deg)
MEAN_EA1=       3.539695918650 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     120.344595562553 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=      36.525761158080 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-05-19T14:05:57' / Start date of observations
DATE-END= '2007-05-23T18:30:14' / End date of observations
TSTART  = 2.329012520000000E+08 / time start
TSTOP   = 2.332601927447482E+08 / time stop
TELAPSE = 3.589407447482049E+05 / elapsed time
ONTIME  = 1.532412021875679E+05 / On-source time
EXPOSURE= 1.532412021875679E+05 / Exposure time
MJD-OBS = 5.423961708546296E+04 / MJD of data start time
FILIN001= 'ae802033010xi0_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= 'ae802033010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae802033010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae802033010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae802033010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae802033010xi3_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 150 ks Suzaku observation of Abell 2744 aiming at non-thermal hard X-ray detection. It has a red-shift of 0.3, a radio-halo flux of 57 mJy at 1.4 GHz and ICM temperature of 9 keV. Our strategy here is to observe a luminous merging cluster hosting a bright radio halo, whilst avoiding the thermal ICM emission to overwhelm the 10-40 keV band, in which the HXD has the best sensitivity. The key is to look for relatively high red-shift cluster. Since the CMB density increases as (1+z)^4, the inverse Compton emission relative to the radio flux increases typically as (1+z)^2, while the thermal ICM emission is red-shifted. We believe this is one of the best method to utilize the Suzaku power for cluster hard X-ray survey.