Suzaku Observation : 704053010

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Fits Header

TELESCOP= 'SUZAKU  '           / Telescope (mission) name
OBS_ID  = '704053010'          / Observation identification string
OBSERVER= 'KEVIN SCHAWINSKI'   / Principal Investigator
OBJECT  = 'IC 2497 '           / Name of observed object
OBS_REM = '        '           / remark on observation
RA_OBJ  =             145.2670 / planned target R.A.(deg)
DEC_OBJ =              34.7328 / planned target DEC.(deg)
RA_NOM  = 1.452220000000000E+02 / Right Ascension of target (deci. deg)
DEC_NOM = 3.467990000000000E+01 / Declination of target (deci. deg)
PA_NOM  =             306.2341 / nominal position angle from north to DETY(deg)
MEAN_EA1=     145.221951013552 / mean of the 1st ZYZ-Euler angle (deg)
MEAN_EA2=      55.320134728346 / mean of the 2nd ZYZ-Euler angle (deg)
MEAN_EA3=     143.765886134072 / mean of the 3rd ZYZ-Euler angle (deg)
DATE-OBS= '2009-04-18T16:34:31' / Start date of observations
DATE-END= '2009-04-20T13:19:19' / End date of observations
TSTART  = 2.933877350000000E+08 / time start
TSTOP   = 2.935487303216208E+08 / time stop
TELAPSE = 1.609953216207623E+05 / elapsed time
ONTIME  = 7.648372408413887E+04 / On-source time
EXPOSURE= 7.648372408413887E+04 / Exposure time
MJD-OBS = 5.493969212018518E+04 / MJD of data start time
FILIN001= 'ae704053010xi0_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= 'ae704053010xi0_0_5x5n066a_cl.evt.gz' / Input file name
FILIN003= 'ae704053010xi1_0_3x3n069b_cl.evt.gz' / Input file name
FILIN004= 'ae704053010xi1_0_5x5n069b_cl.evt.gz' / Input file name
FILIN005= 'ae704053010xi3_0_3x3n066a_cl.evt.gz' / Input file name
FILIN006= 'ae704053010xi3_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:

The discovery of `Hanny's Voorwerp' near IC 2497 opens an unprecedented window into the time evolution of a single AGN on timescales up to 100,000 years. Based on its properties, the Voorwerp was illuminated by a luminous AGN ~100,000 years ago, but the AGN host galaxy - IC 2497 - does not seem to host a sufficiently luminous AGN. Thus, IC 2497 either hosts a highly obscured AGN only detectable in hard X-rays, or it has dropped in luminosity by a factor of 10-1000. We propose to observe IC 2497 with Suzaku for 75 ksec to determine the hard X-ray luminosity and spectrum to measure the amount of obscuration and the current intrinsic luminosity of its AGN. Only with hard X-ray observations can we break the degeneracy between obscuration and decrease in luminosity.