J/A+A/487/119 AGN in XMM-Newton Hard Bright Survey (Della Ceca+, 2008)
The cosmological properties of AGN in the XMM-Newton Hard Bright Survey.
Della Ceca R., Caccianiga A., Severgnini P., Maccacaro T., Brunner H.,
Carrera F.J., Cocchia F., Mateos S., Page M.J., Tedds J.A.
<Astron. Astrophys. 487, 119 (2008)>
=2008A&A...487..119D 2008A&A...487..119D
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: galaxies: active - galaxies: nuclei - galaxies: evolution -
X-ray: diffuse background - X-ray: Surveys - X-ray: active galaxies
Abstract:
We investigate here the X-ray luminosity function (XLF) of absorbed
(NH between 4x1021 and 1024cm-2) and unabsorbed
(NH<4x1021cm-2) AGN, the fraction of absorbed AGN as a function
of LX (and z), the intrinsic NH distribution of the AGN
population, and the XLF of Compton thick (N_H>1024cm-2) AGN. To
carry out this investigation, we have used the XMM-Newton Hard Bright
Serendipitous Sample (HBSS), a complete sample of bright X-ray sources
(fx≳7x10-14erg/cm2/s) at high galactic latitude (|b|>20°)
selected in the 4.5-7.5keV energy band. The HBSS sample is now almost
completely identified (97% spectroscopic identifications) and it can
be safely used for a statistical investigation. The HBSS contains 62
AGN out of which 40 are unabsorbed (or marginally absorbed;
NH<4x1021cm-2) and 22 are absorbed (NH between 4x1021 and
∼1024cm-2).
Description:
The XMM-Newton Hard Bright Serendipitous Survey (HBSS) is part of a
bigger survey project known as XMM Bright Serendipitous Survey (XBS).
This latter consists of two flux-limited serendipitous samples of
X-ray selected sources at high galactic latitude (|b|>20deg): the XMM
BSS sample (389 sources) and the XMM HBSS sample (67 sources, with 56
sources in common with the BSS sample) having an EPIC MOS2 count rate
limit, corrected for vignetting, of 10-2cts/s (2x10-3cts/s) in the
0.5-4.5keV (4.5-7.5keV) energy band; the flux limit is ∼7x10-14cgs
in both energy selection bands. At the time of this writing the
spectroscopic identification rate is 87% for the BSS sample and 97%
for the HBSS sample. The details on the XMM-Newton fields selection
strategy and the source selection criteria of the XMM BSS and HBSS
samples are discussed in Della Ceca et al. (2004, Cat.
J/A+A/428/383), while a description of the optical data and
analysis, of the optical classification scheme, and of the optical
properties of the extragalactic sources identified so far, is
presented in Caccianiga et al. (2008A&A...477..735C 2008A&A...477..735C). The optical and
X-ray properties of the galactic population are discussed in
Lopez-Santiago et al. (2007A&A...463..165L 2007A&A...463..165L).The current classification
breakdown of the HBSS sample is as follows: 62 AGN, 1 cluster of
galaxies (XBSJ 141830.5+251052), and 2 X-ray emitting stars (XBSJ
014100.6-675328 and XBSJ 123600.7-395217). Two X-ray sources
(XBSJ080411.3+650906 and XBSJ 110050.6-344331) are still unidentified
at the time of this writing.
In table1 we report the basic X-ray spectral properties, (e.g., photon
index, intrinsic absorbing column density NH, intrinsic 2-10keV
luminosity) of the HBSS AGN sample obtained from a complete X-ray
spectral analysis of the XMM-Newton data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 62 Basic X-ray information of the XMM-Newton HBSS
AGN Sample
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2007)
IX/39 : XMM-Newton 2nd Serendipitous Source Catalogue (2XMM) (XMM-SSC, 2007)
J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)
J/A+A/444/79 : Lockman Hole brightest AGNs XMM observations (Mateos+, 2005)
J/MNRAS/366/171 : Red AGN in XMM/SDSS fields (Georgakakis+, 2006)
J/A+A/473/105 : Lockman Hole AGN variability with XMM (Mateos+, 2007)
J/A+A/474/473 : XMM-LSS survey: AGN classifications (Garcet+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [XBS]
4- 19 A16 --- XBS XBS source name (JHHMMSS.s+DDMMSS)
21- 25 F5.2 ct/ks CRate Source MOS2 count rate, (4.5-7.5keV band)
27- 30 F4.2 ct/ks e_CRate One sigma error on CRate
32- 36 F5.3 --- z Redshift of the source
38- 41 F4.2 --- Gamma X-ray photon index
43- 46 F4.2 --- e_Gamma ?=9.99 90% lower error on Gamma (1)
48- 51 F4.2 --- E_Gamma ?=9.99 90% upper error on Gamma (1)
53 A1 --- l_Nh Limit flag on Nh
54- 59 F6.3 10+22cm-2 Nh Absorbing column density at the source
redshift
61- 65 F5.2 10+22cm-2 e_Nh ?=9.99 90% lower error on Nh (2)
67- 71 F5.2 10+22cm-2 E_Nh ?=9.99 90% upper error on Nh (2)
73- 77 F5.2 10-16W/m2 F2-10 Observed 2-10keV flux corrected for
Galactic absorption
79- 83 F5.2 [10+35W] logL2-10 Log of the intrinsic (i.e. de-absorbed)
2-10keV luminosity
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Note (1): If e_Gamma or E_Gamma are equal to 9.99 thus the photon index
Gamma has been fixed.
Note (2): If the absorbing column density is an upper limit thus e_Nh and
E_Nh have been fixed to 9.99.
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Acknowledgements:
Roberto Della Ceca, roberto.dellaceca(at)brera.inaf.it
(End) Roberto Della Ceca [OABrera, Italy], Patricia Vannier [CDS] 24-Jul-2008