Suzaku Observation : 802008010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '802008010'          / Observation identification string
OBSERVER= 'NAOMI OTA'          / Principal Investigator
OBJECT  = 'CEN45   '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             192.5167 / planned target R.A.(deg)
DEC_OBJ =             -41.3825 / planned target DEC.(deg)
RA_NOM  = 1.925119000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -4.138650000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             104.7288 / nominal position angle from north to DETY(deg)
MEAN_EA1=     192.511941220248 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     131.386537086654 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     345.271185702816 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-12-24T03:31:23' / Start date of observations
DATE-END= '2007-12-25T05:30:24' / End date of observations
TSTART  = 2.517822873134224E+08 / time start
TSTOP   = 2.518752290000000E+08 / time stop
TELAPSE = 9.294168657758832E+04 / elapsed time
ONTIME  = 5.824451333561540E+04 / On-source time
EXPOSURE= 5.824451333561540E+04 / Exposure time
MJD-OBS = 5.445814758677572E+04 / MJD of data start time
FILIN001= 'ae802008010xi0_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= 'ae802008010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae802008010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae802008010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae802008010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae802008010xi3_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 obtain high-quality X-ray spectra of the subcluster region in the Centaurus cluster, Cen45, aiming at the first reliable detection of a supersonic motion of the intracluster gas. Previous optical and X-ray observations suggest that Cen45 is indeed in the process of merging and has a high velocity relative to the main cluster. Utilizing the high-sensitivity Suzaku/XIS spectroscopy, the line-of-sight velocity of the X-ray emitting gas can be accurately measured from the Doppler shift of iron-K lines. With our proposed 40ks observation, we can put a strong constraint on the gas motion in the subcluster region. This will also have great impacts on our understanding of dynamical state of clusters and their evolution.