2007MNRAS.378.1335P


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST10:16:48

2007MNRAS.378.1335P - Mon. Not. R. Astron. Soc., 378, 1335-1355 (2007/July-2)

The XMM-SSC survey of hard-spectrum XMM-Newton sources - I. Optically bright sources.

PAGE M.J., LEHMANN I., BOLLER T., WATSON M.G., DWELLY T., HESS S., MATUTE I., LOARING N.S., ROSEN S., ZIAEEPOUR H., SCHWOPE A., LAMER G., CARRERA F.J., TEDDS J., DELLA CECA R., SEVERGNINI P., McMAHON R.G. and YUAN W.

Abstract (from CDS):

We present optical and X-ray data for a sample of serendipitous XMM-Newton sources that are selected to have 0.5-2 versus 2-4.5 keV X-ray hardness ratios which are harder than the X-ray background. The sources have 2-4.5 keV X-ray flux ≥10–14 erg/cm2/s, and in this paper we examine a subsample of 42 optically bright (r < 21) sources; this subsample is 100 per cent spectroscopically identified. All but one of the optical counterparts are extragalactic, and we argue that the single exception, a Galactic M star, is probably a coincidental association rather than the correct identification of the X-ray source. The X-ray spectra of all the sources are consistent with heavily absorbed power laws (21.8 < log NH< 23.4), and all of them, including the two sources with 2-10 keV intrinsic luminosities of <1042 erg/s, appear to be absorbed active galactic nuclei (AGN). The majority of the sources show only narrow emission lines in their optical spectra, implying that they are type 2 AGN. Three sources have 2-10 keV luminosities of >1044 erg/s, and two of these sources have optical spectra which are dominated by narrow emission lines, that is, are type 2 QSOs. Only a small fraction of the sources (7/42) show broad optical emission lines, and all of these have NH< 1023/cm2. This implies that ratios of X-ray absorption to optical/ultraviolet extinction equivalent to >100 times the Galactic gas-to-dust ratio are rare in AGN absorbers (at most a few per cent of the population), and may be restricted to broad absorption line QSOs. Seven objects appear to have an additional soft X-ray component in addition to the heavily absorbed power law; all seven are narrow emission-line objects with z < 0.3 and 2-10 keV intrinsic luminosities <1043 erg/s. We consider the implications of our results in the light of the AGN unified scheme. We find that the soft components in narrow-line objects are consistent with the unified scheme provided that >4 per cent of broad-line AGN (BLAGN) have ionized absorbers that attenuate their soft X-ray flux by >50 per cent. In at least one of the X-ray-absorbed BLAGN in our sample the X-ray spectrum requires an ionized absorber, consistent with this picture.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: active - X-rays: galaxies

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 - 2021
#notes
1 2XMM J005601.4-012405 AGN 00 56 01.46 -01 24 05.0           ~ 2 0
2 2MASS J00560958-0126422 AGN 00 56 09.5495560308 -01 26 41.712467770           ~ 4 0
3 2XMM J021908.3-044731 AGN 02 19 08.390 -04 47 31.17           ~ 7 0
4 2MASX J02193906-0511336 QSO 02 19 39.0855952966 -05 11 33.742156699   18.3202 17.5209 16.50   ~ 17 0
5 2XLSSd J022321.9-045738 QSO 02 23 22.002 -04 57 38.57   22.04     19.46 ~ 10 0
6 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 1002 0
7 L 595-22 PM* 05 56 24.7419816722 -27 51 32.362978169   12.31 12.38     sdG 147 0
8 2MASX J05580206-3820043 Sy1 05 58 02.0566732230 -38 20 04.453517461   16.05 14.98 11.6   ~ 208 1
9 2XMM J080625.3+244323 QSO 08 06 25.3385385721 +24 43 23.953153084   19.76 19.54     ~ 9 0
10 2MASX J08313901+5242055 Sy2 08 31 39.0864322075 +52 42 05.549361402   18.52 17.91     ~ 12 0
11 2XMM J090523.8+621110 AGN 09 05 23.7418576704 +62 11 09.444536695           ~ 3 0
12 2XMM J094239.8+465005 AGN 09 42 39.99 +46 50 04.9           ~ 2 0
13 2XMM J094454.2-083952 AGN 09 44 54.02 -08 39 52.8           ~ 2 0
14 2XMM J094527.2-083308 AGN 09 45 27.18 -08 33 08.1           ~ 2 0
15 2XMM J095231.7-015014 G 09 52 31.812 -01 50 14.04           ~ 2 0
16 2XMM J095539.4+411728 AGN 09 55 39.356 +41 17 29.46           ~ 3 0
17 2XMM J104441.8-012655 AGN 10 44 41.883 -01 26 55.98           ~ 4 0
18 WISE J104444.50-013312.9 X 10 44 44.500 -01 33 14.22           ~ 3 0
19 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 759 0
20 2XMM J105014.5+325041 AGN 10 50 14.5575352533 +32 50 42.193823197           ~ 3 0
21 2XMM J105743.6-033403 QSO 10 57 43.6904465427 -03 34 01.940563867           ~ 2 0
22 2XMM J111825.2+073448 AGN 11 18 25.2195903885 +07 34 48.289332252           ~ 4 0
23 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1503 0
24 LAWD 37 WD* 11 45 42.9170659451 -64 50 29.464090822 11.08 11.725 11.513 11.34 11.163 DQ 238 0
25 2XMM J115233.6+371155 AGN 11 52 33.80 +37 11 56.5           ~ 2 0
26 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3442 2
27 2XMM J121312.0+024931 AGN 12 13 12.17 +02 49 25.9           ~ 2 0
28 2XMM J122656.4+013124 Sy2 12 26 56.4781500862 +01 31 24.297279975   21.37 20.72     ~ 35 0
29 3XMM J125701.7+281229 QSO 12 57 01.7150577546 +28 12 30.052017131           ~ 9 0
30 2XMM J130129.0+274037 AGN 13 01 29.154 +27 40 37.30           ~ 3 0
31 2MASX J13045902+1754536 LIN 13 04 58.9958374536 +17 54 54.116431569           ~ 8 0
32 2XMM J130529.8-102140 EmG 13 05 29.89 -10 21 42.3           ~ 1 0
33 2XMM J133026.0+241356 AGN 13 30 26.057 +24 13 55.91       18.70   ~ 4 0
34 2XMM J133622.9+241735 AGN 13 36 22.884 +24 17 35.76           ~ 3 0
35 2XMM J133914.0-314423 G 13 39 13.94 -31 44 22.4           ~ 1 0
36 2MASS J13465688+5803155 QSO 13 46 56.88 +58 03 15.6           ~ 9 0
37 2XMM J140057.1-110120 AGN 14 00 57.1013231187 -11 01 21.382335862           ~ 3 0
38 1RXS J140125.2+025617 Sy1 14 01 27.6953580216 +02 56 06.047417199   20.60 19.91     ~ 25 0
39 2XMM J140145.0+025332 Sy2 14 01 45.020 +02 53 33.29           ~ 4 0
40 2XMM J140149.4-111648 AGN 14 01 49.4991220257 -11 16 48.746390142           ~ 3 0
41 2XMM J141634.7+113331 QSO 14 16 34.808 +11 33 31.13           ~ 4 0
42 2XMM J145048.9+191430 QSO 14 50 48.9566094768 +19 14 30.631225053           ~ 13 0
43 87GB 150115.3+102756 BLL 15 03 39.5 +10 16 03   17.6   16.56   ~ 17 1
44 2XMM J150558.3+014104 AGN 15 05 58.397 +01 41 04.64     18.87   17.44 ~ 5 0
45 2XMM J151650.3+070905 AGN 15 16 50.393 +07 09 04.99           ~ 3 0
46 2XMM J152146.6+073113 AGN 15 21 46.703 +07 31 13.47           ~ 3 0
47 2XMM J152254.6+074534 AGN 15 22 54.63 +07 45 33.4           ~ 2 0
48 BD+33 2642 pA* 15 51 59.8857490337 +32 56 54.327647794 9.806 10.61 10.73 10.884 10.961 O7p 386 0
49 2XMM J161646.3+122016 AGN 16 16 46.354 +12 20 17.24           ~ 3 0
50 2XMM J161736.2+122902 AGN 16 17 36.2338464962 +12 29 03.126758796           ~ 4 0
51 2MASS J16181898+1241117 QSO 16 18 18.9849199402 +12 41 11.525988752           ~ 7 0

    Equat.    Gal    SGal    Ecl

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2021.04.18-10:16:48

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