J/A+A/467/73 3σ hard sample of XMDS survey (Tajer+, 2007)
Obscured and unobscured AGN populations in a hard-X-ray selected sample
of the XMDS survey.
Tajer M., Polletta M., Chiappetti L., Maraschi L., Trinchieri G.,
Maccagni D., Andreon S., Garcet O., Surdej J., Pierre M., Le Fevre O.,
Franceschini A., Lonsdale C.J., Surace J.A., Shupe D.L., Fang F.,
Rowan-Robinson M., Smith H.E., Tresse L.
<Astron. Astrophys., 467, 73-91 (2007)>
=2007A&A...467...73T 2007A&A...467...73T
ADC_Keywords: Surveys ; Active gal. nuclei ; X-ray sources ; Infrared sources ;
Redshifts ; Photometry, UBVRI
Keywords: X-rays: general - surveys - galaxies: active
Abstract:
Our goal is to probe the populations of obscured and unobscured AGN
investigating their optical-IR and X-ray properties as a function of
X-ray flux, luminosity and redshift within a hard X-ray selected
sample with wide multiwavelength coverage. We selected a sample of 136
X-ray sources detected at a significance of ≥3σ in the 2-10keV
band (F2-10≳10-14erg/cm2/s) in a ∼1deg2 area in the XMM
Medium Deep Survey (XMDS, Cat. J/A+A/439/413). The XMDS area is
covered with optical photometry from the VVDS and CFHTLS surveys and
infrared Spitzer data from the SWIRE survey. Based on the X-ray
luminosity and X-ray to optical ratio, 132 sources are likely AGN, of
which 122 have unambiguous optical - IR identification. The observed
optical and IR spectral energy distributions of all identified sources
are fitted with AGN/galaxy templates in order to classify them and
compute photometric redshifts. X-ray spectral analysis is performed
individually for sources with a sufficient number of counts and using
a stacking technique for subsamples of sources at different flux
levels. Hardness ratios are used to estimate X-ray absorption in
individual weak sources.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 124 145 The 3σ hard sample
--------------------------------------------------------------------------------
See also:
III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)
J/A+A/461/81 : Galaxy clusters in the CFHTLS (Olsen+, 2007)
J/A+A/403/857 : VLA-VIRMOS Deep Field (Bondi+, 2003)
J/ApJ/591/640 : XMM-LSS low-frequency radio counterparts (Cohen+, 2003)
J/A+A/439/413 : XMDS/VVDS 4σ catalogue (Chiappetti+, 2005)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq Sequential number, XMDS NNNN in Simbad
6- 9 A4 --- --- [XMDS]
10- 25 A16 --- XMDS XMDS designation (JHHMMSS.s+DDMMSS)
27- 28 I2 h RAh Right ascension (J2000)
30- 31 I2 min RAm Right ascension (J2000)
33- 38 F6.3 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41 I1 deg DEd Declination (J2000)
43- 44 I2 arcmin DEm Declination (J2000)
46- 51 F6.3 arcsec DEs Declination (J2000)
53- 57 F5.2 10-17W/m2 F2-10keV Flux in the 2-10keV band
59- 63 F5.2 --- HR Hardness ratio between the 2-10 and 0.5-2keV
bands
65- 67 F3.1 arcsec X-O ?=- Distance between the X-ray and optical
VVDS positions
69- 73 F5.2 mag Bmag ?=- VVDS B magnitude (in AB system)
75- 79 F5.2 mag Imag ?=- VVDS I magnitude (in AB system)
81 A1 --- Col [BR-] Color classification (1)
83- 87 F5.2 mag i'mag ?=- CFHTLS i' magnitude (in AB system)
89- 93 I5 uJy F3.6um ?=- SWIRE flux at 3.6um
95 A1 --- l_F24um Limit flag on F24um
96-100 I5 uJy F24um ?=- SWIRE flux at 24um
102-107 F6.4 --- zsp ?=- Spectroscopic redshift
109-113 F5.3 --- zph ?=- Photometric redshift
115-118 A4 --- Type SED classification
120-124 F5.2 [10-7W] logLX ?=- Absorption corrected X-ray luminosity in
the 2-10keV band
--------------------------------------------------------------------------------
Note (1): Color classification as follows:
B = blue, i.e. B-I≤1
R = red, i.e. B-I>1
- = no value
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Aug-2007