Suzaku Observation : 402089020

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '402089020'          / Observation identification string
OBSERVER= 'JURGEN HMM SCHMITT' / Principal Investigator
OBJECT  = 'TW HYA  '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             165.4663 / planned target R.A.(deg)
DEC_OBJ =             -34.7047 / planned target DEC.(deg)
RA_NOM  = 1.654619000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = -3.470810000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              99.3673 / nominal position angle from north to DETY(deg)
MEAN_EA1=     165.461899351258 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=     124.708081498246 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     350.632709878334 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2007-11-25T01:28:39' / Start date of observations
DATE-END= '2007-11-25T16:40:14' / End date of observations
TSTART  = 2.492702500000000E+08 / time start
TSTOP   = 2.493239988167538E+08 / time stop
TELAPSE = 5.374881675380468E+04 / elapsed time
ONTIME  = 2.002563349121809E+04 / On-source time
EXPOSURE= 2.002563349121809E+04 / Exposure time
MJD-OBS = 5.442907308083333E+04 / MJD of data start time
FILIN001= 'ae402089020xi0_0_3x3n066a_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= 'ae402089020xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN003= 'ae402089020xi3_0_3x3n066a_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 cTTS TW~Hya, SU~Aur and XZ~Tau with the Suzaku XIS in order to search for soft X-ray "excesses", indicating the presence of accretion induced X-rays in cTTS. We plan to utilize the sensitivity and capability of the Suzaku XIS to resolve the OVIII/OVII lines.With grating observations the absence of the forbidden line in the latter was found to provide strong evidence for the presence of accretion in the X-ray spectra of a few cTTS. With the increased sensitivity of Suzaku the presence of soft X-ray excesses can be demonstrated in a far larger sample of stars, and we want to demonstrate the existence of a soft X-ray, probably accretion induced component in cTTS with extremely hot coronae exhibiting the presence of the 6.7 keV iron line complex in their spectra.