Suzaku Observation : 508019010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '508019010'          / Observation identification string
OBSERVER= 'MASAYOSHI NOBUKAWA' / Principal Investigator
OBJECT  = 'SGR C   '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             266.1554 / planned target R.A.(deg)
DEC_OBJ =             -29.4695 / planned target DEC.(deg)
RA_NOM  = 2.661575000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -2.947210000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             265.0180 / nominal position angle from north to DETY(deg)
MEAN_EA1=     266.157459113860 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     119.472115318438 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     184.982018555050 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2013-09-24T06:22:37' / Start date of observations
DATE-END= '2013-09-26T21:30:21' / End date of observations
TSTART  = 4.333189680575858E+08 / time start
TSTOP   = 4.335441820000000E+08 / time stop
TELAPSE = 2.252139424141645E+05 / elapsed time
ONTIME  = 1.042494797683954E+05 / On-source time
EXPOSURE= 1.042494797683954E+05 / Exposure time
MJD-OBS = 5.655926657687021E+04 / MJD of data start time
FILIN001= 'ae508019010xi0_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= 'ae508019010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae508019010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae508019010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae508019010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae508019010xi3_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:

X-ray emissions from giant molecular clouds (X-ray reflection nebula) in the Galactic center region show past activity of the super-massive black hole, Sagittarius (Sgr) A*. Using Suzaku, we have found that Sgr A* had been in the active phase for almost a thousand years and dropped down to the quiescent level tens of years ago. However, no detailed information during the active phase and transition has been obtained from observations to study a mechanism of the sudden phase change. We aim to observe new information about time variability and relative positions from X-ray reflection nebulae to find the past light curve of Sgr A*. This work will be the grand sum for the Suzaku observation of the Galactic center.