Suzaku Observation : 503056010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '503056010'          / Observation identification string
OBSERVER= 'HIROSHI TSUNEMI'    / Principal Investigator
OBJECT  = 'CYGNUS LOOP (P20)'  / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             312.0000 / planned target R.A.(deg)
DEC_OBJ =              31.1750 / planned target DEC.(deg)
RA_NOM  = 3.119894000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 3.118240000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              50.0002 / nominal position angle from north to DETY(deg)
MEAN_EA1=     311.989355045261 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      58.817572721349 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=      39.999828756861 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2008-05-10T17:45:16' / Start date of observations
DATE-END= '2008-05-11T12:14:24' / End date of observations
TSTART  = 2.637567203857065E+08 / time start
TSTOP   = 2.638225570000000E+08 / time stop
TELAPSE = 6.583661429351568E+04 / elapsed time
ONTIME  = 3.013431018519402E+04 / On-source time
EXPOSURE= 3.013431018519402E+04 / Exposure time
MJD-OBS = 5.459674056214938E+04 / MJD of data start time
FILIN001= 'ae503056010xi0_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= 'ae503056010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae503056010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae503056010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae503056010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae503056010xi3_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 Cygnus Loop is a prototypical middle-aged SNR. Based on the previous observation, the shell region shows relatively low temperature with low metal abundance while the interior shows high temperature with high metal abundance. The plasma in the interior is the fossil of the progenitor star. Recently, we found a region in the central part of the Loop where the shell is very thin. The observation in this region will show the precise mass of the progenitor star. We found most of the shell region showed extremely low abundance. This may suggest that the plasma in the shell region consists of a thin thermal spectrum and a non-thermal spectrum. We may be able to find a region showing non-thermal emission. We propose to observe the Cygnus Loop for 180ks.