Suzaku Observation : 402070010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '402070010'          / Observation identification string
OBSERVER= 'JULIA C LEE'        / Principal Investigator
OBJECT  = 'CIRCINUS X-1'       / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             230.1704 / planned target R.A.(deg)
DEC_OBJ =             -57.1669 / planned target DEC.(deg)
RA_NOM  = 2.301633000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -5.716950000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             115.2060 / nominal position angle from north to DETY(deg)
MEAN_EA1=     230.163285666003 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     147.169510011807 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     334.794014267516 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2008-03-05T04:41:16' / Start date of observations
DATE-END= '2008-03-06T13:15:19' / End date of observations
TSTART  = 2.580087481274047E+08 / time start
TSTOP   = 2.581237161103965E+08 / time stop
TELAPSE = 1.149679829918444E+05 / elapsed time
ONTIME  = 4.641135068699718E+04 / On-source time
EXPOSURE= 4.641135068699718E+04 / Exposure time
MJD-OBS = 5.453021310545607E+04 / MJD of data start time
FILIN001= 'ae402070010xi0_0_3x3n090a_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= 'ae402070010xi0_0_5x5n090a_cl.evt.gz' / Input file name
FILIN003= 'ae402070010xi1_0_3x3n091b_cl.evt.gz' / Input file name
FILIN004= 'ae402070010xi1_0_5x5n091b_cl.evt.gz' / Input file name
FILIN005= 'ae402070010xi3_0_3x3n092a_cl.evt.gz' / Input file name
FILIN006= 'ae402070010xi3_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:

We propose a 100ks Suzaku observation of Circinus X-1 through the zero (dipping) phase to facilitate 2 important and independent science goals. (1) For the binary, we wish to better understand the viewing geometry, and investigate physical changes in the binary behavior as it relates to observed spectral changes through periastron passage. (2) Conduct a large angle scattering study of the X-ray halo surrounding Circinus X-1 to diagnose ISM grain properties (the line-of-sight position, size distribution, and grain density) near us, in complement with our Chandra halo studies at small angles on grain properties near the source.