Suzaku Observation : 506036010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '506036010'          / Observation identification string
OBSERVER= 'MAKOTO SAWADA'      / Principal Investigator
OBJECT  = 'W28WEST '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             269.8333 / planned target R.A.(deg)
DEC_OBJ =             -23.6000 / planned target DEC.(deg)
RA_NOM  = 2.698372000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -2.360720000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             270.1135 / nominal position angle from north to DETY(deg)
MEAN_EA1=     269.837194761422 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     113.607200888492 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     179.886494630012 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2011-10-10T01:23:59' / Start date of observations
DATE-END= '2011-10-14T03:13:21' / End date of observations
TSTART  = 3.715250550000000E+08 / time start
TSTOP   = 3.718771856969873E+08 / time stop
TELAPSE = 3.521306969872713E+05 / elapsed time
ONTIME  = 1.511003466598988E+05 / On-source time
EXPOSURE= 1.511003466598988E+05 / Exposure time
MJD-OBS = 5.584405924981481E+04 / MJD of data start time
FILIN001= 'ae506036010xi0_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= 'ae506036010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae506036010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae506036010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae506036010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae506036010xi3_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:

W28 is a mixed-morphology supernova remnant (MM SNR). Recently, GeV and TeV gamma-ray emission have been detected from the eastern edge of W28. On the other hand, we have observed the central region of W28 and have detected an over-ionized plasma, which can not be produced in the canonical evolution of SNRs. Several SNRs have been turned out to host a over-ionized plasma. All of them are MM SNR and are showing GeV and/or TeV emission. This indicates that there are some physical connections between the existence of high-energy cosmic rays and over-ionized plasma. W28 is the best place to study this possible connection due to the large apparent size. Thus, we propose Suzaku observation of western region of W28, which has not been covered by the previous mapping observations.