Suzaku Observation : 506027010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '506027010'          / Observation identification string
OBSERVER= 'KATSUHIRO HAYASHI'  / Principal Investigator
OBJECT  = 'NGC 7618'           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             349.8308 / planned target R.A.(deg)
DEC_OBJ =              42.9307 / planned target DEC.(deg)
RA_NOM  = 3.498326000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 4.291440000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             269.9991 / nominal position angle from north to DETY(deg)
MEAN_EA1=     349.832587457848 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      47.085605700154 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     180.000892357832 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2011-12-16T09:44:11' / Start date of observations
DATE-END= '2011-12-18T14:47:15' / End date of observations
TSTART  = 3.773438710000000E+08 / time start
TSTOP   = 3.775337230000000E+08 / time stop
TELAPSE = 1.898520000000000E+05 / elapsed time
ONTIME  = 1.011851488831043E+05 / On-source time
EXPOSURE= 1.011851488831043E+05 / Exposure time
MJD-OBS = 5.591140665722222E+04 / MJD of data start time
FILIN001= 'ae506027010xi0_0_3x3n066l_cl.evt.gz' / Input file name
SEQPNUM =                    2 / 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= 'ae506027010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae506027010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae506027010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae506027010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae506027010xi3_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 to observe nearby merging galaxy group NGC 7618. The asymmetric X-ray shape with a tail and a sharp brightness discontinuity were discoverd by observations of ASCA and Chandra. This is due to a merging with an another galaxy group, UGC 12491, which has similar mass of NGC 7618. The pair is in the primary stage of merging, then we need to obtain the information of the gas outside region to clarify the process of the merging. By taking advantage of low background and high energy resolution of XIS, we estimate accurately distribuion of temperature and metal abundances around both galaxy groups. Then we aim to clarify the process of the merging system of the galaxy groups.