Suzaku Observation : 407089010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '407089010'          / Observation identification string
OBSERVER= 'CARLO FERRIGNO'     / Principal Investigator
OBJECT  = 'EXO 2030+375'       / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             308.0637 / planned target R.A.(deg)
DEC_OBJ =              37.6375 / planned target DEC.(deg)
RA_NOM  = 3.080462000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 3.765550000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              58.3113 / nominal position angle from north to DETY(deg)
MEAN_EA1=     308.046214265939 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      52.344535308203 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=      31.688651544422 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2012-05-23T20:12:35' / Start date of observations
DATE-END= '2012-05-25T18:57:23' / End date of observations
TSTART  = 3.911208213549962E+08 / time start
TSTOP   = 3.912874293105561E+08 / time stop
TELAPSE = 1.666079555599093E+05 / elapsed time
ONTIME  = 7.795688930082321E+04 / On-source time
EXPOSURE= 7.795688930082321E+04 / Exposure time
MJD-OBS = 5.607086210114579E+04 / MJD of data start time
FILIN001= 'ae407089010xi0_0_2x2n090l_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= 'ae407089010xi0_0_3x3n090l_cl.evt.gz' / Input file name
FILIN003= 'ae407089010xi1_0_3x3n140b_cl.evt.gz' / Input file name
FILIN004= 'ae407089010xi3_0_2x2n092a_cl.evt.gz' / Input file name
FILIN005= 'ae407089010xi3_0_3x3n092a_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:

We propose to observe the Be/X-ray binary system EXO 2030+375 in the ascending part of one of its normal periastron flares for 75ks to study the onset of the pulsar activity. Quasi-periodic hour-long flux oscillations were recently observed during INTEGRAL serendipitous observations and by EXOSAT in 1985. They appear to happen at the viscous time-scale of a disk, evidencing some kind of instability in the transition zone between the magnetosphere and the accretion disk. The broad-band coverage and sensitivity of Suzaku will allow us to investigate in detail the opening of the magnetic gate for this high-magnetic field neutron star by studying the high time resolution light curve, the shape of its pulsed signal and the spectral properties.