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Vincenzo Mainieri

Obscured and unobscured AGN in the XMM-COSMOS Survey. Vincenzo Mainieri. G. Hasinger, N. Cappelluti, M. Brusa, F. Civano, A. Comastri, M. Elvis, A. Finoguenov, F. Fiore, R. Gilli, J. Silverman, C. Vignali & XMM-COSMOS team. The XMM-COSMOS survey (PI G. Hasinger). Area = 2 deg 2

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Vincenzo Mainieri

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  1. Obscured and unobscured AGN in the XMM-COSMOS Survey Vincenzo Mainieri G. Hasinger, N. Cappelluti, M. Brusa, F. Civano, A. Comastri, M. Elvis, A. Finoguenov, F. Fiore, R. Gilli, J. Silverman, C. Vignali & XMM-COSMOS team Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  2. The XMM-COSMOS survey (PI G. Hasinger) Area = 2 deg2 Flux limits: [0.5-2] keV -> 7.0x10-16 cgs [2-10] keV -> 3.3x10-15 cgs [5-10] keV -> 1.0x10-14 cgs 1390 point-like X-ray sources (Cappelluti et al. 2006) 1.4 deg See Marcella Brusa’s talk on Tuesday Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  3. The sample 715 X-ray sources in the 12F > 100 counts (0.3-10 keV) Point-like Identified (z) 135 sources Optical Classification (Magellan&zCOSMOS): 86 BL AGN, 49 not BL AGN Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  4. The sample 715 X-ray sources in the 12F > 100 counts (0.3-10 keV) Bright Faint Point-like = 2.0 NH free  free NH free Identified (z) Bright Faint 135 sources 180 Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  5. Spectra extraction Define source and background extraction regions (off-axis angle, S/N, nearby sources) Extract spectrum and background for each single pointing Combine spectrum and background coming from different pointings Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  6. X-ray zoo [0.5-2][2-4.5][4.5-10] keV APL APL+Fe PL APL+soft Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  7. vs NH • <> = 2.06 ± 0.08 • <> does not change with NH • <> does not change with z Bright sample: 82 sources NHgal=[2.5-2.9] x 1020 cm-2 Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  8. NH distribution 24% are absorbed No BL AGN has NH>1022 cm-2 9% of BL AGN have NH>NHgal 1 Compton thick candidate Bright + Faint sample Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  9. Comparison between X-ray and optical classification X-ray unabsorbed Gal 34% X-ray absorbed Gal 5% NLAGN 19% Gal 34% NLAGN 41% NLAGN 41% BLAGN 76% BLAGN 25% 2/3of NLAGN do not show X-ray absorption: 80% z>0.4 --> H outside 50% have MgII inside but not enough S/N Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  10. X-ray spectral properties catalogue Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  11. Compare HR and NH values 90% of the sources with NH>1022 cm-2 have HR>-0.3 The only source outside this box shows soft excess in its X-ray spectra 99% of the sources with NH<1022 cm-2 have HR<-0.3 Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  12. X/O vs NH A tool to select obscured AGN: 60% X/O>10 are obscured (to be compare with the 23% for the full sample) High-z candidates? Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  13. QSO-2 candidates X-ray surveys are finding the radio quiet population of QSO-2 They are spanning a large redshift range: [0.7-2.4] R-K ~ 4-5 (Vega) Two are detected at 20cm: 540±24 Jy -> 9.8x1023 W/Hz 52±11 Jy -> 1.5x1023 W/Hz For the other two: F20cm(4.5) ~ 50 Jy Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  14. xid=122 Composite Sy2 z=2.418 xid=70 z=0.688 xid=2237 z=0.941 Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  15. Compton-thick Hasinger et al. 2006 Guainazzi, Matt & Perola 2005 Local (z=0) sample of Compton thick sources Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

  16. Compton-thick pexrav+gauss 25 arcsec ACS/HST z=0.1248 (SDSS spectrum) Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006 …only 131 counts

  17. Conclusions Best models in the 12F: PL (76%), APL (20%), other (Fe,pexrav,etc..) 4% <>=2.06±0.08 (from 82 sources) No correlation between  and NH or z We are building the observed NH distribution for a large and uniform sample of AGN 4 new QSO-2: their SED is well reproduced by a composite Sy2 spectrum Significant detection of FeK in three objects, one new Compton-thick candidate …more to come: the XMM-Newton data are all in hand and the spectroscopic follow-up is rapidly proceeding (Magellan & zCOSMOS) Mainieri et al 2006, submitted to Apj (COSMOS ApJS issue) Extragalatic Surveys, Cambridge MA, Nov 6-8, 2006

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