J/A+A/539/A48 XMM AGN optical-UV luminosities (Marchese+, 2012)
The optical-UV spectral energy distribution of the unabsorbed AGN population in
the XMM-Newton Bright Serendipitous Survey.
Marchese E., Della Ceca R., Caccianiga A., Severgnini P., Corral A.,
Fanali R.
<Astron. Astrophys., 539, A48 (2012)>
=2012A&A...539A..48M 2012A&A...539A..48M
ADC_Keywords: Active gal. nuclei ; Energy distributions ; Ultraviolet ;
X-ray sources ; Galaxies, optical
Keywords: galaxies: active - galaxies: nuclei - accretion, accretion disks -
cosmology: observations - methods: statistical
Abstract:
Active galactic nuclei (AGN) emit radiation over a wide range of
wavelengths, with a peak of emission in the far-UV region of the
electromagnetic spectrum, a spectral region that is historically
difficult to observe.
Using optical, GALEX UV, and XMM-Newton data we derive the spectral
energy distribution (SED) from the optical/UV to X-ray regime of a
sizeable sample of AGN. The principal motivation is to investigate the
relationship between the optical/UV emission and the X-ray emission
and provide bolometric corrections to the hard X-ray (2-10keV)
energy range, kbol, the latter being a fundamental parameter in
current physical cosmology.
Description:
We construct and study the X-ray to optical SED of a sample of
195 X-ray selected Type 1 AGN belonging to the XMM-Newton bright
serendipitous survey (XBS). The optical-UV luminosity was computed
using data from the Sloan Digital Sky Survey (SDSS), from our own
dedicated optical spectroscopy and the satellite GALaxy evolution
EXplorer (GALEX), while the X-ray luminosity was computed using
XMM-Newton data. Because it covers a wide range of redshift
(0.03<z≲2.2), X-ray luminosities (41.8<logL[2-10]keV<45.5erg/s) and
because it is composed of "bright objects", this sample is ideal for
this kind of investigation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 104 195 Main properties of the sample of 195 Type 1 AGN
analysed in this work
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See also:
J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)
J/A+A/487/119 : AGN in XMM-Newton Hard Bright Survey (Della Ceca+, 2008)
J/A+A/530/A42 : X-ray properties of AGN in XBS (Corral+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- XBS XBS name (JHHMMSS.s+DDMMSS)
18- 21 F4.2 --- z Redshift
23- 27 F5.2 [10-7W] logLd Disc luminosity
29- 32 F4.2 [10-7W] E_logLd Error on logLd (upper value)
34- 37 F4.2 [10-7W] e_logLd Error on logLd (upper value)
39- 43 F5.2 [10-7W] logLX X-ray luminosity in 2-10keV band LX
45- 49 F5.2 [10-7W] logLb Bolometric luminosity Lbol
51- 54 F4.2 [10-7W] E_logLb Error on logLb (upper value)
56- 59 F4.2 [10-7W] e_logLb Error on logLb (lower value)
61- 64 F4.2 --- Gamma Photon index Γ (1)
65 A1 --- n_Gamma [c] Note on Gamma (2)
66- 69 F4.2 --- E_Gamma ? Error on Gamma (upper value)
71- 74 F4.2 --- e_Gamma ? Error on Gamma (lower value)
76- 79 F4.2 --- aox X-ray to optical-UV spectral index α
81- 84 F4.2 --- E_aox Error on aox (upper lower)
86- 89 F4.2 --- e_aox Error on aox (lower value)
91- 94 F4.2 [-] logkb Bolometric correction kbol (Lbol/LX)
96- 99 F4.2 [-] E_logkb Error on logkb (upper lower)
101-104 F4.2 [-] e_logkb Error on logkb (lower lower)
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Note (1): For a detailed account of the X-ray properties of all the sources
see Corral et al. (2011, Cat. J/A+A/530/A42)
Note (2): Fixed parameter. We assume the cosmological model H0=65km/s/Mpc-1,
ΩΛ=0.7 and ΩM=0.3 throughout this paper.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Apr-2012