Suzaku Observation : 507028010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '507028010'          / Observation identification string
OBSERVER= 'SHINYA NAKASHIMA'   / Principal Investigator
OBJECT  = 'GC_SOUTH_1'         / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             268.0971 / planned target R.A.(deg)
DEC_OBJ =             -29.4762 / planned target DEC.(deg)
RA_NOM  = 2.680988000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -2.947710000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             274.6002 / nominal position angle from north to DETY(deg)
MEAN_EA1=     268.098845668706 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     119.477142418055 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     175.399767231445 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2012-09-20T00:55:27' / Start date of observations
DATE-END= '2012-09-21T08:01:10' / End date of observations
TSTART  = 4.014177750000000E+08 / time start
TSTOP   = 4.015296526165681E+08 / time stop
TELAPSE = 1.118776165681481E+05 / elapsed time
ONTIME  = 5.176986154532433E+04 / On-source time
EXPOSURE= 5.176986154532433E+04 / Exposure time
MJD-OBS = 5.619003980537037E+04 / MJD of data start time
FILIN001= 'ae507028010xi0_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= 'ae507028010xi0_0_3x3n090l_cl.evt.gz' / Input file name
FILIN003= 'ae507028010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN004= 'ae507028010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN005= 'ae507028010xi1_0_3x3n140b_cl.evt.gz' / Input file name
FILIN006= 'ae507028010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN007= 'ae507028010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN008= 'ae507028010xi3_0_3x3n092a_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 have discovered the large and peculiar plasma emission from the south of the galactic center (around l=0, b=-1.5 degree). Observed column density shows that this plasma is located in the galactic center region. Assuming the distance of 8 kpc, the size of the plasma is 40 pc x 120 pc. Then, the estimated total energy of the plasma reaches 8e51 ergs. What is the engine creating such a energetic plasma ? Moreover, the ionization temperature of this plasma is larger than the electron temperature (over-ionized plasma). This condition is peculiar in the standard heating mechanism of a plasma. What is the origin of the over-ionized plasma ? Since the previous Suzaku observation covers only a part of the plasma, we propose the observation of the other part for the further investigation.