Suzaku Observation : 808060010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '808060010'          / Observation identification string
OBSERVER= 'TORU SASAKI'        / Principal Investigator
OBJECT  = 'NGC1550_45OFFSET_E' / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =              65.5527 / planned target R.A.(deg)
DEC_OBJ =               2.4100 / planned target DEC.(deg)
RA_NOM  = 6.555440000000000E+01 / Right Ascension of target (deci. deg)
DEC_NOM = 2.410600000000000E+00 / Declination of target (deci. deg)
PA_NOM  =             260.0002 / nominal position angle from north to DETY(deg)
MEAN_EA1=      65.554444930483 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      87.589388750988 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     189.999807234528 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2014-02-08T02:40:37' / Start date of observations
DATE-END= '2014-02-09T08:30:17' / End date of observations
TSTART  = 4.451436350000000E+08 / time start
TSTOP   = 4.452488280000000E+08 / time stop
TELAPSE = 1.051930000000000E+05 / elapsed time
ONTIME  = 5.304956388497353E+04 / On-source time
EXPOSURE= 5.304956388497353E+04 / Exposure time
MJD-OBS = 5.669612614796296E+04 / MJD of data start time
FILIN001= 'ae808060010xi0_0_3x3n066l_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= 'ae808060010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae808060010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae808060010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae808060010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae808060010xi3_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 study the entropy profile and the metal enrichment process of the fossil group, NGC 1550 with total 170 ksec observations. NGC 1550 is a bright nearby group (z=0.0124), and classified as a fossil group which has no bright galaxies except for a central elliptical galaxy. Fossil groups, therefore, are a very useful system for investigating how the ICM metals have been enriched from galaxies. On the other hand, it is known that the entropy of groups has a several times larger than that of clusters within ~0.2 r180, and has similar value to clusters at 0.5 r180. However, in r > 0.5 r180 region, the entropy profile of groups has not been observed yet, while those of clusters have shown a flatter slope than the expected value from simulations in the Suzaku results.