CDS

2009A&A...494..579N

Query : 2009A&A...494..579N

2009A&A...494..579N - Astronomy and Astrophysics, volume 494, 579-589 (2009/2-1)

A multi-wavelength survey of AGN in the XMM-LSS field. I. Quasar selection via the KX technique.

NAKOS T., WILLIS J.P., ANDREON S., SURDEJ J., RIAUD P., HATZIMINAOGLOU E., GARCET O., ALLOIN D., BAES M., GALAZ G., PIERRE M., QUINTANA H., PAGE M.J., TEDDS J.A., CEBALLOS M.T., CORRAL A., EBRERO J., KRUMPE M. and MATEOS S.

Abstract (from CDS):

We present a sample of candidate quasars selected using the KX-technique. The data cover 0.68°2 of the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey area where overlapping multi-wavelength imaging data permits an investigation of the physical nature of selected sources. The KX method identifies quasars on the basis of their optical (R and z') to near-infrared (Ks) photometry and point-like morphology. We combine these data with optical (u*,g',r',i',z') and mid-infrared (3.6-24µm) wavebands to reconstruct the spectral energy distributions (SEDs) of candidate quasars. Of 93 sources selected as candidate quasars by the KX method, 25 are classified as quasars by the subsequent SED analysis. Spectroscopic observations are available for 12/25 of these sources and confirm the quasar hypothesis in each case. Even more, 90% of the SED-classified quasars show X-ray emission, a property not shared by any of the false candidates in the KX-selected sample. Applying a photometric redshift analysis to the sources without spectroscopy indicates that the 25 sources classified as quasars occupy the interval 0.7≤z≤2.5. The remaining 68/93 sources are classified as stars and unresolved galaxies.

Abstract Copyright: ∼

Journal keyword(s): techniques: photometric - galaxies: quasars: general - galaxies: active

Nomenclature: Tables 4, 5: [NWA2009] NNW N=19 among (Nos 2-85, 1S, 2S).

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023 		#notes
1 NAME XMM-LSS Field reg 02 18 00 -07 00.0           ~ 230 0
2 SDSS J022242.54-043018.5 QSO 02 22 42.5416421448 -04 30 18.587840040   20.84   20.677   ~ 11 0
3 SDSS J022242.92-043314.6 QSO 02 22 42.9360009000 -04 33 14.700716172       20.610   ~ 10 0
4 SDSS J022244.40-043347.0 QSO 02 22 44.4139130448 -04 33 47.060375220   19.97   18.307   ~ 19 0
5 SDSS J022247.88-043330.2 QSO 02 22 47.8890653736 -04 33 30.227756256   19.92   20.151   ~ 13 0
6 SDSS J022249.62-041353.1 QSO 02 22 49.6269356688 -04 13 53.171250276   19.73   20.301   ~ 19 0
7 2MASS J02225509-0412107 * 02 22 55.0986411960 -04 12 10.774648980   20.7   19.012 16.88 ~ 1 0
8 SDSS J022257.98-041840.9 AGN 02 22 57.9767263656 -04 18 40.945088664   19.70   19.047   ~ 13 0
9 SDSS J022258.90-045852.4 QSO 02 22 58.9071716112 -04 58 52.446305280   20.24   19.337 18.84 ~ 20 0
10 SDSS J022302.06-043205.3 AGN 02 23 02.067 -04 32 05.37       20.437   ~ 7 0
11 SDSS J022304.16-044435.5 QSO 02 23 04.1624582976 -04 44 35.548737612       20.446   ~ 7 0
12 SDSS J022306.05-043323.9 QSO 02 23 06.0552362321 -04 33 23.853466460   20.81   20.394   ~ 16 0
13 SDSS J022315.37-042559.8 AGN 02 23 15.3903536280 -04 26 00.133723464   19.41   19.695   ~ 7 0
14 2XLSSd J022319.5-044731 Sy1 02 23 19.6254414600 -04 47 31.040429100   21.18   19.284 18.48 ~ 19 0
15 SDSS J022325.63-042254.2 QSO 02 23 25.632 -04 22 54.25       21.415   ~ 4 0
16 SDSS J022326.46-045706.1 QSO 02 23 26.4621522624 -04 57 06.154586244   20.98   20.994 20.48 ~ 18 0
17 [NWA2009] 33 QSO 02 23 36.870 -04 30 51.84       22.305   ~ 1 0
18 SDSS J022340.78-042255.6 QSO 02 23 40.7861578992 -04 22 55.561189908   19.93   19.473   ~ 14 0
19 2XLSSd J022344.2-045724 EmG 02 23 44.214 -04 57 25.13   19.67   19.803   ~ 6 0
20 SDSS J022350.77-043158.3 QSO 02 23 50.7820976256 -04 31 58.288397700   19.99   19.394 19.23 ~ 13 0
21 SDSS J022351.06-044730.0 QSO 02 23 51.0729091296 -04 47 30.077537388   20.33   20.065   ~ 12 0
22 2XMM J022351.2-042053 EmG 02 23 51.2623324344 -04 20 53.470577508   20.35   19.635 19.11 ~ 9 0
23 SDSS J022352.18-043031.8 QSO 02 23 52.1937840216 -04 30 31.871690064       19.847   ~ 11 0
24 SDSS J022352.54-041821.8 QSO 02 23 52.5505416504 -04 18 21.739661244       20.267   ~ 7 0
25 2MASS J02235471-0448150 QSO 02 23 54.8157923472 -04 48 15.096264120   18.25   18.163 18.01 ~ 22 0
26 SDSS J022358.63-045351.7 QSO 02 23 58.6459214760 -04 53 51.784598976   20.26   19.866   ~ 22 0
27 SDSS J022413.47-045210.4 QSO 02 24 13.4785216872 -04 52 10.379617176   21.10   20.646   ~ 12 0
28 2XLSSd J022416.4-045640 QSO 02 24 16.6542031656 -04 56 43.111964976       20.696   ~ 5 0
29 SDSS J022418.79-050120.7 G 02 24 18.796 -05 01 20.76       20.769   ~ 2 0
30 SDSS J022424.16-043229.9 QSO 02 24 24.1769338176 -04 32 29.983151184   18.97   18.914 18.65 ~ 19 0
31 SDSS J022429.11-045807.8 QSO 02 24 29.1202605168 -04 58 07.796058276   20.60   19.626   ~ 15 0
32 SDSS J022514.39-044700.2 QSO 02 25 14.3937779352 -04 47 00.304370880   18.63   19.225 18.17 ~ 15 0
33 SDSS J022515.34-044009.0 QSO 02 25 15.3537283824 -04 40 09.063906960       19.839   ~ 15 0
34 2MASS J02252109-0439496 AGN 02 25 21.0895624584 -04 39 49.848914088   21.08   19.416 18.39 ~ 11 0
35 SDSS J022524.70-044045.1 AG? 02 25 24.707 -04 40 45.12   19.80   19.044   ~ 9 0
36 GAMA J022531.38-044220.2 G 02 25 31.39 -04 42 20.2       20.015   ~ 4 0
37 SDSS J022532.02-044346.7 AGN 02 25 32.025 -04 43 46.78       20.224   ~ 7 0
38 SDSS J022534.82-042401.6 QSO 02 25 34.826 -04 24 01.69       20.965   ~ 11 0
39 SDSS J022537.04-050109.4 QSO 02 25 37.0417968216 -05 01 09.479998596   20.04   19.968   ~ 10 0
40 SDSS J022537.16-042132.9 QSO 02 25 37.1666367696 -04 21 32.949760860   19.39   19.196 19.11 ~ 18 0
41 VIDEO J022537.56-045440.43 QSO 02 25 37.56 -04 54 40.4       20.399   ~ 3 0
42 SDSS J022539.36-042228.0 QSO 02 25 39.362 -04 22 28.07       20.889   ~ 7 0
43 SDSS J022540.57-043825.2 QSO 02 25 40.5845925984 -04 38 25.291694976   20.58   19.860   ~ 20 0
44 2XLSSd J022555.3-043918 QSO 02 25 55.4442593208 -04 39 18.328069620   21.02   20.660   ~ 10 0
45 SDSS J022556.83-045853.2 QSO 02 25 56.8312491408 -04 58 53.194543284   21.27   20.947   ~ 9 0
46 SDSS J022557.62-045005.4 QSO 02 25 57.6250145664 -04 50 05.447540760   20.30   19.454   ~ 17 0
47 SDSS J022558.86-050054.5 AGN 02 25 58.8600149784 -05 00 54.458160624   18.89   18.324   ~ 10 1
48 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5700 6
49 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2883 4
50 NGC 6090 PaG 16 11 40.3 +52 27 21   14.0       ~ 419 2
51 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2631 0

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2023.03.23-20:48:02

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