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J/ApJ/663/81    SED of hard X-ray selected AGN in XMDS         (Polletta+, 2007)

Spectral energy distributions of hard X-ray selected active galactic nuclei in the XMM-Newton Medium Deep Survey. Polletta M., Tajer M., Maraschi L., Trinchieri G., Lonsdale C.J., Chiappetti L., Andreon S., Pierre M., Le Fevre O., Zamorani G., Maccagni D., Garcet O., Surdej J., Franceschini A., Alloin D., Shupe D.L., Surace J.A., Fang F., Rowan-Robinson M., Smith H.E., Tresse L. <Astrophys. J., 663, 81-102 (2007)> =2007ApJ...663...81P
ADC_Keywords: X-ray sources ; Active gal. nuclei ; QSOs ; Redshifts Keywords: galaxies: active - infrared: galaxies - quasars: general - X-rays: galaxies Abstract: We present the SEDs of a hard X-ray selected sample containing 136 sources with F(2-10)keV>10-14erg/cm2/s; 132 are AGNs. The sources are detected in a 1deg2 area of the XMM-Newton Medium Deep Survey where optical data from the VVDS and CFHTLS and infrared data from the SWIRE survey are available. Based on a SED fitting technique we derive photometric redshifts with σ(1+z)=0.11 and 6% of outliers and identify AGN signatures in 83% of the objects. This fraction is higher than derived when a spectroscopic classification is available. The remaining 17% of AGNs show star-forming galaxy SEDs (SF class). Description: The sample studied in this work includes 136 sources detected at ≥3σ in the 2-10keV X-ray band, corresponding to ~=10-14erg/cm2/s, in a 1deg2 region of the XMDS. The XMDS consists of 19 XMM-Newton pointings of 20 ks nominal exposure covering a contiguous area of about 2.6deg2. The XMDS is complete to a 2-10keV flux of 9x10-14erg/cm2/s (Paper I, Chiappetti et al., 2005, Cat. J/A+A/439/413). The 1deg2 area chosen for this study is centered at RA(2000.0)=2h26m, DE(2000.0)=-4°30' (see Paper II (Tajet et al., 2007, Cat. J/A+A/467/73 for the layout of the selected field on the entire XMDS area) and benefits from a wealth of observations from various surveys. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 113 144 Luminosities, redshift, and classification of the hard X-ray selected sample
See also: III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005) J/A+A/457/79 : VIMOS VLT Deep Survey: faint type-1 AGN (Gavignaud+, 2006) J/A+A/474/473 : XMM-LSS survey: AGN classifications (Garcet+, 2007) J/AJ/133/186 : Optical spectroscopy of 77 luminous AGNs and QSOs (Lacy+, 2007) J/A+A/439/413 : XMDS/VVDS 4σ catalogue (Chiappetti+, 2005) J/A+A/467/73 : 3σ hard sample of XMDS survey (Tajer+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq ? Sequential number, XMDS NNNN in Simbad 6- 9 A4 --- --- [XMDS] 11- 27 A17 --- XMDS XMM Medium Deep Survey designation 28- 32 F5.3 --- zph ?=- Photometric redshift 34- 39 F6.4 --- zsp ?=- Spectroscopic redshift 40 A1 --- r_zsp Origin of zsp (1) 42 I1 --- Cl ?=- Spectroscopic AGN classification (6) 44 A1 --- l_NH Limit flag on NH 45- 51 F7.3 10+22cm-2 NH ?=- Effective H column density (3) 53- 57 F5.2 [10-7W] logLBX Rest-frame broadband (0.5-10keV) luminosity not corrected for absorption (4) 59- 63 F5.2 [10-7W] logLBXc Absorption-corrected rest-frame broadband (0.5-10keV) luminosity (4) 65- 69 F5.2 [10-7W] logLHXc Absorption-corrected rest-frame hard-band (2-10keV) luminosity (4) 71 A1 --- l_logL1.4 Limit flag on logL1.4 72- 76 F5.2 [10-7W/Hz] logL1.4 ?=- Monochromatic radio luminosity at 1.4GHz rest frame 78- 82 F5.2 [10-7W] logLmIR ?=- Integrated mid-IR luminosity in the 3-20um rest-frame wavelength range (8) 84- 87 F4.2 mag AV Optical extinction derived from the best fit (5) 89- 96 A8 --- Temp SED best-fit template 98-101 A4 --- Cl2 AGN classification from SED (6) 103-113 A11 --- Com Comments (7)
Note (1): Origin of spectrosopic redshift: a = Garcet et al. (2007, Cat. J/A+A/474/473) b = Gavignaud et al. (2006, Cat. J/A+A/457/79) c = Lacy et al. (2007, Cat. J/AJ/133/186) d = Le Fevre et al. (2005, Cat. III/250) e = Fixed maximum value of the intrinsic column density f = NED (Nasa Extragalactic Database) Note (3): Upper limits are derived from the minimum value of 2.6x1020cm-2 corresponding to the Galactic value, when no additional absorption was required. Note (4): All X-ray luminosities have been derived assuming an absorbed power-law spectrum with photon index Γ=1.7 and column density NH Note (5): assuming the prescription reported in Calzetti et al. (2000ApJ...533..682C) Note (6): AGN classification is: 1 = AGN1 = type 1 AGN 2 = AGN2 = type 2 AGN 3 = SF = star-forming-galaxy-like AGNs Note (7): Comments as follows: B = indicates a source in sample B Bu = marks those in sample B with unreliable poorly sampled SED M = refers to a source for which the absolute magnitude criterion for the photometric redshift determination was relaxed No IR = indicates sources without SWIRE coverage. Note (8): the paper indicates in the caption of Table 1 that the units are solar luminosities, but Figs 7 and 8 plot the values as log(erg/s).
History: From electronic version of the journal References: Chiappetti et al., Paper I 2005A&A...439..413C, Cat. J/A+A/439/413 Tajer et al., Paper II 2007A&A...467...73T, Cat. J/A+A/467/73
(End) Patricia Vannier [CDS] 14-Jun-2009
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