Suzaku Observation : 508004010
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Fits Header
TELESCOP= 'SUZAKU ' / Telescope (mission) name
OBS_ID = '508004010' / Observation identification string
OBSERVER= 'HIROYUKI UCHIDA' / Principal Investigator
OBJECT = 'W44_EAST' / Name of observed object
OBS_REM = ' ' / remark on observation
RA_OBJ = 284.1410 / planned target R.A.(deg)
DEC_OBJ = 1.3060 / planned target DEC.(deg)
RA_NOM = 2.841459000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 1.299100000000000E+00 / Declination of target (deci. deg)
PA_NOM = 254.9985 / nominal position angle from north to DETY(deg)
MEAN_EA1= 284.145899821844 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2= 88.700869425553 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3= 195.001481697652 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2013-10-18T08:06:02' / Start date of observations
DATE-END= '2013-10-19T21:21:13' / End date of observations
TSTART = 4.353987721785376E+08 / time start
TSTOP = 4.355328531488695E+08 / time stop
TELAPSE = 1.340809703318477E+05 / elapsed time
ONTIME = 5.831494389170408E+04 / On-source time
EXPOSURE= 5.831494389170408E+04 / Exposure time
MJD-OBS = 5.658333838382566E+04 / MJD of data start time
FILIN001= 'ae508004010xi0_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= 'ae508004010xi0_0_5x5n066h_cl.evt.gz' / Input file name
FILIN003= 'ae508004010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN004= 'ae508004010xi1_0_3x3n130b_cl.evt.gz' / Input file name
FILIN005= 'ae508004010xi1_0_5x5n130b_cl.evt.gz' / Input file name
FILIN006= 'ae508004010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN007= 'ae508004010xi3_0_3x3n113a_cl.evt.gz' / Input file name
FILIN008= 'ae508004010xi3_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:
W44 is a middle-aged supernova remnant (SNR) categorized to mixed-morphology SNR. We have observed the center region of W44 with Suzaku in the AO5 phase. The spectra are well reproduced by a thermal plasma in a recombining phase. While such plasmas have been found from several SNRs, the origin is still unclear. We also discover hard X-ray emission which shows an arc-like structure spatially-correlated with a radio continuum filament. No conventional model for particle acceleration could explain the mechanism of the hard X-ray emission. The entire plasma distribution of W44 will provide a clue to resolve the origins of the reombining plasma and the hard X-ray emission. We therefore require four pointing observations for totally 280 ks.