Suzaku Observation : 509072010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '509072010'          / Observation identification string
OBSERVER= 'MAKOTO SAWADA'      / Principal Investigator
OBJECT  = 'G306.3-0.9'         / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             200.4533 / planned target R.A.(deg)
DEC_OBJ =             -63.5686 / planned target DEC.(deg)
RA_NOM  = 2.004753000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -6.356020000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             306.5675 / nominal position angle from north to DETY(deg)
MEAN_EA1=     200.475302975982 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     153.560243343765 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     143.432507245372 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2014-08-20T18:49:48' / Start date of observations
DATE-END= '2014-08-25T00:14:22' / End date of observations
TSTART  = 4.618757973528088E+08 / time start
TSTOP   = 4.622408448199779E+08 / time stop
TELAPSE = 3.650474671691060E+05 / elapsed time
ONTIME  = 1.900180741981268E+05 / On-source time
EXPOSURE= 1.900180741981268E+05 / Exposure time
MJD-OBS = 5.688978543445381E+04 / MJD of data start time
FILIN001= 'ae509072010xi0_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= 'ae509072010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae509072010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN004= 'ae509072010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN005= 'ae509072010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae509072010xi3_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:

The origin of the distorted, inhomogeneous structure of mixed-morphology SNRs (MM SNRs) is a mystery. Recently we have discovered recombining plasma from MM SNRs. The existence of recombining plasma implies rapid cooling process in past. Recombining plasma, together with the peculiar morphologies, would indicate a new SNR evolution scenario. Our systematic analysis of recombining SNRs shows that the recombination ages are almost the same, although their dynamical ages range over an order of magnitude. Such a trend can be explained by past rapid rarefaction. This hypothesis can be tested by measuring a recombination age of a dynamically young recombining SNR. We thus propose a 100-ks Suzaku observation of G306.3-0.9, a candidate of the youngest recombining SNR ever.