Suzaku Observation : 405044010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '405044010'          / Observation identification string
OBSERVER= 'MARK H. FINGER'     / Principal Investigator
OBJECT  = '4U 1626-67'         / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             248.0700 / planned target R.A.(deg)
DEC_OBJ =             -67.4619 / planned target DEC.(deg)
RA_NOM  = 2.480734000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -6.746429999999999E+01 / Declination of target (deci. deg)
PA_NOM  =             285.8172 / nominal position angle from north to DETY(deg)
MEAN_EA1=     248.073405392589 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     157.464302835236 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     164.182813337797 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2010-09-06T12:58:56' / Start date of observations
DATE-END= '2010-09-07T05:42:11' / End date of observations
TSTART  = 3.370970356295655E+08 / time start
TSTOP   = 3.371533236223584E+08 / time stop
TELAPSE = 5.628799279290438E+04 / elapsed time
ONTIME  = 2.005748517167568E+04 / On-source time
EXPOSURE= 2.005748517167568E+04 / Exposure time
MJD-OBS = 5.544558680339775E+04 / MJD of data start time
FILIN001= 'ae405044010xi0_0_3x3n090l_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= 'ae405044010xi0_0_5x5n090l_cl.evt.gz' / Input file name
FILIN003= 'ae405044010xi1_0_3x3n091b_cl.evt.gz' / Input file name
FILIN004= 'ae405044010xi1_0_5x5n091b_cl.evt.gz' / Input file name
FILIN005= 'ae405044010xi3_0_3x3n092a_cl.evt.gz' / Input file name
FILIN006= 'ae405044010xi3_0_5x5n092a_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:

Recent X-ray observations by Fermi/GBM and Swift/BAT of 4U 1626-67 discovered a new torque reversal of this source after 18 years of steady spinning down. Centered on Feb 4 2008, a dramatic increase in the X-ray flux was also observed. The lack of correlation between the X-ray flux and the torque applied to the neutron star before the transition, challenges our understanding of the physical mechanisms operating in this system. The main goal of this proposal is to look for changes in the long term flux behavior, energy spectra, pulse profile, line features and power spectra with the current evolution in 4U1626-67 s spin-up rate. In addition, we wish to determine whether the absence of the QPO observed just after the torque reversal persist.