Suzaku Observation : 803072010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '803072010'          / Observation identification string
OBSERVER= 'TAKAYA OHASHI'      / Principal Investigator
OBJECT  = 'A3558 WEST OFF'     / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             201.4480 / planned target R.A.(deg)
DEC_OBJ =             -31.5859 / planned target DEC.(deg)
RA_NOM  = 2.014503000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -3.158560000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             288.4754 / nominal position angle from north to DETY(deg)
MEAN_EA1=     201.450302387355 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     121.585634341638 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     161.524590687584 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2008-07-10T12:43:51' / Start date of observations
DATE-END= '2008-07-13T00:32:24' / End date of observations
TSTART  = 2.690090710000000E+08 / time start
TSTOP   = 2.692236430000000E+08 / time stop
TELAPSE = 2.145720000000000E+05 / elapsed time
ONTIME  = 8.181615075856447E+04 / On-source time
EXPOSURE= 8.181615075856447E+04 / Exposure time
MJD-OBS = 5.465753165722222E+04 / MJD of data start time
FILIN001= 'ae803072010xi0_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= 'ae803072010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae803072010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae803072010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae803072010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae803072010xi3_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 aim at the first significant detection of redshifted OVII and OVIII lines from the warm-hot intergalactic medium (WHIM) in the Shapley Supercluster. The system, located at z = 0.048, shows the richest concentration of X-ray clusters in the nearby universe. Previous ROSAT observation showed enhanced soft X-ray emission along the cluster connection. We propose to observe for 80 ksec a region between A3558 (the brightest central cluster) and A3556, separated by 0.9 virial radius from both clusters and along the line of cluster connection. A 40 ksec observation is also proposed at a 2-degree offest region to measure the foreground Galactic spectrum. Based on the ROSAT flux, we expect to detect redshifted OVII and OVII lines at more than 7 sigma confidence.