2002A&A...393..425M


Query : 2002A&A...393..425M

2002A&A...393..425M - Astronomy and Astrophysics, volume 393, 425-438 (2002/10-2)

XMM-Newton observation of the Lockman Hole. II. Spectral analysis.

MAINIERI V., BERGERON J., HASINGER G., LEHMANN I., ROSATI P., SCHMIDT M., SZOKOLY G. and DELLA CECA R.

Abstract (from CDS):

We present the results of the X-ray spectral analysis of the first deep X-ray survey with the XMM-Newton observatory during Performance Verification. The X-ray data of the Lockman Hole field and the derived cumulative source counts were reported by Hasinger et al. (2001A&A...365L..45H). We restrict the analysis to the sample of 98 sources with more than 70 net counts (flux limit in the [0.5-7]keV band of 1.6x10–15erg/cm2/s) of which 61 have redshift identification. We find no correlation between the spectral index Γ and the intrinsic absorption column density NH and, for both the Type-1 and Type-2 AGN populations, we obtain <Γ≥∼2. The progressive hardening of the mean X-ray source spectrum with decreasing flux is essentially due to an increase in intrinsic absorption. The marked separation between the two AGN populations in several diagnostics diagrams, involving X-ray colour, X-ray flux, optical/near IR colour and optical brightness, is also a consequence of different absorption column densities and enables the classification of optically faint obscured AGN. The Type-2 and obscured AGN have weaker soft X-ray and optical fluxes and redder R-K' colours. They follow the evolutionary tracks of their host galaxies in a color-redshift diagram. About 27% of the subsample with R-K' colour are EROs (R-K'≥5) and most of these 18 X-ray selected EROs contain an obscured AGN as revealed by their high X-ray-to-optical/near IR flux ratios. There are six sources in our sample with LX[0.5-10]>1044erg/s and log(NH)>1022cm–2: which are likely Type-2 QSOs and we thus derive a density of ∼69 objects of this class per square degree.

Abstract Copyright:

Journal keyword(s): surveys - galaxies: active - galaxies: quasars: general - cosmology: diffuse radiation - X-ray: galaxies - X-rays: general

VizieR on-line data: <Available at CDS (J/A+A/393/425): table2.dat>

Nomenclature: Table 2: [MBH2002] NN (Nos 1-98).

CDS comments: In reflist, Lehmann, 2000 : 34 is a misprint for 35.

Simbad objects: 100

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Number of rows : 100
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME sds1b-014 AGN 02 18 42.97 -05 04 37.3   23.5818 22.7191 22.0   ~ 10 0
2 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 841 0
3 2XMM J105111.7+572635 AG? 10 51 11.711 +57 26 34.57           ~ 7 0
4 [MBC2005] 226 X 10 51 20.66 +57 27 01.7           ~ 4 0
5 2XMM J105125.3+573050 Sy1 10 51 25.3238423736 +57 30 50.338701036     19.30     ~ 13 0
6 [BCH2008] 243 X 10 51 28.23 +57 27 40.1           ~ 5 0
7 [BCH2008] 444 PM* 10 51 30.9358892064 +57 34 39.630370584   17.11       M5Ve? 14 0
8 2XMM J105137.3+573043 AGN 10 51 37.302 +57 30 42.98           ~ 13 0
9 [VV2006] J105144.7+572806 Sy1 10 51 44.91 +57 28 08.0     21.20     ~ 12 0
10 [MBC2005] 351 AGN 10 51 46.57 +57 30 36.6           ~ 6 0
11 SDSS J105148.73+573248.7 AGN 10 51 48.732 +57 32 48.71     23.2 22.90   ~ 27 0
12 2XMM J105149.9+572521 AGN 10 51 49.914 +57 25 21.75           ~ 6 0
13 2XMM J105154.3+573437 Sy1 10 51 54.377 +57 34 37.79     20.00     ~ 19 0
14 [MBH2002] 76 X 10 51 55.27 +57 29 32.6           ~ 2 0
15 RDS 21 X 10 51 55.39 +57 30 43.4           ~ 2 0
16 [LGE2006] 12 Sy1 10 52 00.11 +57 24 23.5     22.4     ~ 17 0
17 2XMM J105206.6+572924 AGN 10 52 06.699 +57 29 24.61           ~ 7 0
18 [MBH2002] 80 X 10 52 07.92 +57 34 14.5           ~ 4 0
19 3XMM J105209.6+572104 Sy1 10 52 09.708 +57 21 04.54     21.70     ~ 17 0
20 [MBH2002] 65 X 10 52 10.96 +57 32 02.6           ~ 2 0
21 2XMM J105213.2+573221 Sy1 10 52 13.256 +57 32 21.56   21.50 21.38     ~ 18 0
22 2XMM J105216.8+572017 AGN 10 52 16.95 +57 20 18.0           ~ 13 0
23 RX J105220.1+572307 X 10 52 20.17 +57 23 06.8           ~ 5 0
24 UCAC4 739-049221 * 10 52 22.3867432272 +57 37 35.257686024   18.62 17.09 16.44   ~ 4 0
25 [MBH2002] 87 X 10 52 23.93 +57 25 31.4           ~ 2 0
26 2XMM J105224.5+573009 AGN 10 52 24.615 +57 30 09.41           ~ 16 0
27 2XMM J105225.0+572304 AGN 10 52 25.046 +57 23 05.19           ~ 13 0
28 RX J105225.3+572246 Sy1 10 52 25.34 +57 22 47.3     21.7     ~ 8 0
29 XMMU J105225.5+572551 AGN 10 52 25.50 +57 25 50.7         23.80 ~ 7 0
30 RDS 108 AGN 10 52 28.00 +57 33 30.7           ~ 4 0
31 RDS 18 Sy1 10 52 28.34 +57 31 04.3           ~ 10 0
32 [VV98] J105230.1+573913 QSO 10 52 30.0812803008 +57 39 13.483856772   21.75 21.00     ~ 17 0
33 [BCH2008] 179 X 10 52 31.85 +57 25 00.6           ~ 4 0
34 [FFH2002] 115 AGN 10 52 32.18 +57 24 28.2           ~ 5 0
35 2XMM J105236.2+571602 QSO 10 52 36.203 +57 16 02.11           ~ 6 0
36 RDS 116 rG 10 52 37.0 +57 30 58     21.8     ~ 11 0
37 [MBH2002] 46 AGN 10 52 37.18 +57 34 00.4           ~ 5 0
38 2XMM J105238.0+573322 AGN 10 52 38.158 +57 33 22.38     22.4     ~ 8 0
39 [VV98] J105239.6+572432 QSO 10 52 39.5958253296 +57 24 31.425574788   18.39 18.07     ~ 76 0
40 2XMM J105241.5+573650 Sy2 10 52 41.5486629408 +57 36 50.089091364           ~ 12 0
41 [MBH2002] 98 X 10 52 41.78 +57 30 38.1           ~ 4 0
42 2XMM J105242.2+573158 Sy1 10 52 42.38 +57 31 58.3     25.2 25.00   ~ 18 0
43 [MBH2002] 89 X 10 52 42.72 +57 29 10.1           ~ 2 0
44 [VV98] J105243.3+571545 QSO 10 52 43.1559083808 +57 15 44.442070236   20.66 20.46     ~ 24 0
45 RX J105243.4+572800 AGN 10 52 43.51 +57 27 59.5     24.7     ~ 7 0
46 [MBH2002] 74 X 10 52 43.77 +57 35 46.8           ~ 2 0
47 [VV98] J105244.8+572123 QSO 10 52 44.7211227504 +57 21 22.457174220   21.18 20.86     ~ 25 0
48 2XMM J105247.8+573621 AGN 10 52 47.8931594760 +57 36 20.488018500           ~ 4 0
49 2XMM J105247.9+572116 Sy1 10 52 48.0450883248 +57 21 16.654430304   20.84 20.34     ~ 26 0
50 [MBH2002] 61 X 10 52 48.42 +57 41 28.8           ~ 4 0
51 2XMM J105251.4+573200 AGN 10 52 51.519 +57 32 00.56           ~ 7 0
52 [MBC2005] 377 X 10 52 52.039 +57 31 34.63           ~ 5 0
53 2MASS J10525274+5728596 Sy2 10 52 52.7604722568 +57 28 59.623234140     17.8     ~ 22 0
54 SDSS J105254.23+572341.9 Sy1 10 52 54.45 +57 23 42.4     23.1 22.11   ~ 14 0
55 XMMU J105255.1+573146 G 10 52 55.18 +57 31 46.5           ~ 3 0
56 [VV98] J105257.3+572507 QSO 10 52 57.1388606136 +57 25 06.850948620   22.09 21.48     ~ 23 0
57 2XMM J105258.2+572251 AGN 10 52 58.174 +57 22 50.91           ~ 7 0
58 RDS 34F G 10 52 58.52 +57 23 56.0           ~ 3 0
59 [MBH2002] 92 G 10 52 58.89 +57 33 34.8           ~ 2 0
60 [VV98] J105259.3+573030 QSO 10 52 59.163 +57 30 29.98     21.70     ~ 16 0
61 HD 237944 SB* 10 53 01.05344 +57 42 07.9822   10.11 9.41 9.26   G5(N) 34 0
62 [MBC2005] 607 X 10 53 01.691 +57 14 59.15           ~ 5 0
63 2XMM J105302.4+573756 Sy1 10 53 02.412 +57 37 56.83   21.47 21.48     ~ 17 0
64 2XMM J105303.7+572924 Sy1 10 53 03.759 +57 29 24.07           ~ 12 0
65 [MBH2002] 41 AGN 10 53 05.66 +57 28 10.1       23.10   ~ 13 0
66 3XMM J105306.0+573424 Sy1 10 53 06.0540527592 +57 34 24.595144572   20.71 20.46     ~ 26 0
67 [VV98] J105307.4+571505 QSO 10 53 07.3241878632 +57 15 04.632919200     20.30     ~ 24 0
68 2XMM J105309.2+572821 Sy1 10 53 09.2926190448 +57 28 20.539401312   21.15 20.85     ~ 22 0
69 RDS 634 Sy1 10 53 11.80 +57 23 07.0           ~ 8 0
70 2XMM J105312.2+572506 Sy1 10 53 12.239 +57 25 06.20           ~ 11 0
71 RDS 804 AGN 10 53 12.50 +57 34 24.7           ~ 10 0
72 RDS 430 X 10 53 15.23 +57 26 29.4           ~ 4 0
73 ISO-LHDS J105315+572449 AGN 10 53 15.76 +57 24 48.6           ~ 8 0
74 [VV98] J105316.9+573552 QSO 10 53 16.7644541304 +57 35 50.730680004   19.97 19.47     ~ 67 0
75 [VV2010c] J105318.7+572042 AGN 10 53 18.6122820576 +57 20 44.589006888           ~ 10 1
76 SDSS J105319.02+571851.8 AGN 10 53 19.023 +57 18 51.81     21.3 20.84   ~ 19 0
77 [MBH2002] 85 X 10 53 21.69 +57 31 47.2           ~ 4 0
78 2XMM J105322.0+572851 AGN 10 53 22.107 +57 28 51.23     22.70     ~ 10 0
79 ISO-LHDS J105324+572823 Sy1 10 53 24.67 +57 28 18.9     22.4     ~ 11 0
80 2XMM J105329.3+572104 AGN 10 53 29.409 +57 21 04.20           ~ 17 0
81 [MBH2002] 64 X 10 53 30.5 +57 25 16           ~ 1 0
82 CXO J105331.0+573921 Rad 10 53 30.95 +57 39 22.9           ~ 4 0
83 [VV98] J105331.8+572454 QSO 10 53 31.7346910536 +57 24 54.112156956   20.32 20.20     ~ 22 0
84 2XMM J105334.9+572542 AGN 10 53 35.0308257600 +57 25 42.141068976     19.50     ~ 25 0
85 TYC 3829-162-1 * 10 53 36.3452900904 +57 38 00.374488656   11.08 10.50     G2 9 0
86 2XMM J105339.6+573104 Sy1 10 53 39.7417789968 +57 31 04.402572060   19.97 19.79     ~ 23 0
87 NAME RX J1053.7+5735 W ClG 10 53 39.78 +57 35 20.2           ~ 9 0
88 [VV98] J105345.0+572840 QSO 10 53 44.864 +57 28 40.36   21.27 21.19     ~ 23 0
89 [MBH2002] 86 X 10 53 46.90 +57 26 06.2           ~ 4 0
90 RDS 805A Sy1 10 53 47.37 +57 33 50.0     22.6     ~ 10 0
91 [MBH2002] 47 X 10 53 48.15 +57 28 16.3           ~ 5 0
92 SDSS J105348.77+573034.0 AGN 10 53 48.774 +57 30 34.08     23.3     ~ 17 0
93 [VV98] J105350.3+572710 QSO 10 53 50.2208736432 +57 27 09.506758536   20.68 20.56     ~ 23 0
94 RX J105350.7+572515 GrG 10 53 50.81 +57 25 13.6           ~ 3 0
95 2XMM J105358.2+572925 Sy1 10 53 58.273 +57 29 25.74     22.5     ~ 8 0
96 SDSS J105404.31+572036.3 QSO 10 54 04.3189866216 +57 20 36.341895768           ~ 14 0
97 2XMM J105407.1+573524 QSO 10 54 07.1905066728 +57 35 24.391506876           ~ 9 0
98 RDS 20C * 10 54 10.3337402856 +57 30 37.932944508   18.203 16.848 16.276   M5Ve? 9 0
99 SDSS J105411.03+573055.9 G 10 54 11.03424 +57 30 55.9656           ~ 5 0
100 SDSS J105421.19+572544.2 Sy1 10 54 21.1984001400 +57 25 44.284004364       18.80   ~ 43 0

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