Suzaku Observation : 405060010

QL FITS Image

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Fits Header
TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '405060010'          / Observation identification string
OBSERVER= 'LIDIA OSKINOVA'     / Principal Investigator
OBJECT  = '10 LAC  '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             339.8153 / planned target R.A.(deg)
DEC_OBJ =              39.0503 / planned target DEC.(deg)
RA_NOM  = 3.398111000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 3.906190000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              81.7456 / nominal position angle from north to DETY(deg)
MEAN_EA1=     339.811092639499 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      50.938087523448 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=       8.254436445392 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2010-05-28T12:00:17' / Start date of observations
DATE-END= '2010-05-29T01:39:23' / End date of observations
TSTART  = 3.283653090000000E+08 / time start
TSTOP   = 3.284123427576470E+08 / time stop
TELAPSE = 4.703375764697790E+04 / elapsed time
ONTIME  = 2.502837004405260E+04 / On-source time
EXPOSURE= 2.502837004405260E+04 / Exposure time
MJD-OBS = 5.534452515259259E+04 / MJD of data start time
FILIN001= 'ae405060010xi0_0_3x3n066l_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= 'ae405060010xi0_0_5x5n066l_cl.evt.gz' / Input file name
FILIN003= 'ae405060010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae405060010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae405060010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae405060010xi3_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:

We propose to obtain XIS spectra of two O stars with weak winds. They belong to a class of O stars which show significantly weaker mass loss than predicted by the theory of radiation-driven winds. In this respect they resemble the first generation of stars in the early universe, which presumably had only weak winds due to their low metallicity. As explanation for the weak-wind phenomenon it has been suggested that X-rays affect the ionization balance and thus lead to a reduction of the wind-driving force. To check this hypothesis the proposed Suzaku observations are needed. The new data will allow us to discriminate between possible mechanisms for the generation of X-rays, such as magnetic wind confinement or dynamical friction, and serve as input parameters in numerical models.