Suzaku Observation : 809042010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '809042010'          / Observation identification string
OBSERVER= 'KIYOSHI HAYASHIDA'  / Principal Investigator
OBJECT  = 'A1674_NE'           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             196.3626 / planned target R.A.(deg)
DEC_OBJ =              67.5903 / planned target DEC.(deg)
RA_NOM  = 1.963328000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 6.758050000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             327.6637 / nominal position angle from north to DETY(deg)
MEAN_EA1=     196.332812071633 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      22.419453175009 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     122.336255985607 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2014-05-22T08:02:17' / Start date of observations
DATE-END= '2014-05-23T13:10:16' / End date of observations
TSTART  = 4.540609961521076E+08 / time start
TSTOP   = 4.541645230000000E+08 / time stop
TELAPSE = 1.035268478924036E+05 / elapsed time
ONTIME  = 6.053033014523983E+04 / On-source time
EXPOSURE= 6.053033014523983E+04 / Exposure time
MJD-OBS = 5.679933634648273E+04 / MJD of data start time
FILIN001= 'ae809042010xi1_0_3x3b136b_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= 'ae809042010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN003= 'ae809042010xi1_0_5x5n130b_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:

A1674 is a nearby cluster of galaxies, cataloged as richness class 3. Regardless of this extreme richness, its X-ray luminosity is as low as 5e43 erg/s. Our Suzaku AO1 observation revealed that A1674 consists of at least two clusters, one at z~0.2 and the other at z~0.1. Moreover, excess hard X-ray emission was detected with an intensity exceeding the 90% confidence range of the NXB modeling uncertainty. We aim to confirm this hard X-ray emission and to localize that component (really diffuse or point-like) by performing 4 pointings during the AO9 phase.