Suzaku Observation : 804049010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '804049010'          / Observation identification string
OBSERVER= 'JOEL N BREGMAN'     / Principal Investigator
OBJECT  = 'NGC 669 '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =              26.8171 / planned target R.A.(deg)
DEC_OBJ =              35.5633 / planned target DEC.(deg)
RA_NOM  = 2.681130000000000E+01 / Right Ascension of target (deci. deg)
DEC_NOM = 3.556830000000000E+01 / Declination of target (deci. deg)
PA_NOM  =              67.5273 / nominal position angle from north to DETY(deg)
MEAN_EA1=      26.811302389899 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      54.431659102051 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=      22.472711409972 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2009-07-05T05:17:53' / Start date of observations
DATE-END= '2009-07-06T10:30:24' / End date of observations
TSTART  = 3.000872895576711E+08 / time start
TSTOP   = 3.001899855446110E+08 / time stop
TELAPSE = 1.026959869399667E+05 / elapsed time
ONTIME  = 5.026075806641579E+04 / On-source time
EXPOSURE= 5.026075806641579E+04 / Exposure time
MJD-OBS = 5.501723326089897E+04 / MJD of data start time
FILIN001= 'ae804049010xi0_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= 'ae804049010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN003= 'ae804049010xi3_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:

Galaxies are missing most of their baryons when compared to the cosmological baryon to dark matter ratio: the Milky Way retained only 30% of its baryons while lower mass galaxies retain less than 10%. Probably, these baryons were expelled by intense galactic winds during the early star formation period at z = 1-3. These galactic winds can carry gas far beyond the virial radius of small and modest galaxies, but the most massive galaxies should retain much of this gas. We propose to test this picture by searching for the missing baryons surrounding two extremely massive spiral galaxies, with 6-8 times the stellar content of M31 and with v_rot = 370, 420 km/s. If successful, we will detect a significant fraction of the 3-4E11 Msun of the missing baryons as hot gas.