2000A&A...354...35L

Query : 2000A&A...354...35L

2000A&A...354...35L - Astronomy and Astrophysics, volume 354, 35-54 (2000/2-1)

The ROSAT Deep Survey. III. Optical spectral properties of X-ray sources in the Lockman Hole.

LEHMANN I., HASINGER G., SCHMIDT M., GUNN J.E., SCHNEIDER D.P., GIACCONI R., McCAUGHREAN M., TRUEMPER J. and ZAMORANI G.

Abstract (from CDS):

The ROSAT Deep Survey in the Lockman Hole contains a complete sample of 50 X-ray sources with fluxes in the 0.5-2keV band larger than 5.5x10–15erg/cm2/s. Previous work has provided optical identification of 46 of the 50 X-ray sources; over 75% of the sources are AGNs (Schmidt et al., 1998A&A...329..495S). We present now the atlas of optical finding charts and the full description of the spectra, including emission line properties of the optical counterparts, which are important for the object classification. New optical/infrared observations of three of the four unidentified sources show that one source is an AGN and two sources with an unusually large ratio of X-ray to optical flux have counterparts in the K'-band suggesting that they are obscured AGNs. Furthermore, we found evidence from radio emission that the remaining unidentified source is a powerful radio galaxy (AGN). We thus obtain a 100% completeness. During the course of our optical identification work, we obtained optical spectra of 83 field galaxies, of which 67 were narrow-emission line galaxies (NELG). We demonstrate that it is highly unlikely that a significant number of NELG are physically associated with X-ray sources.

Abstract Copyright: ∼

Journal keyword(s): surveys - galaxies: active - galaxies: clusters: general - galaxies: quasars: emission lines - galaxies: Seyfert - X-rays: galaxies

Nomenclature: Table 2, col(3): RDS NNNA N=4 added.

Simbad objects: 57

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Number of rows : 57
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 Lockman Hole reg 10 45 00.0 +58 00 00           ~ 840 0
2 [VV98] J105009.4+571443 QSO 10 50 09.2843216280 +57 14 44.261564496   21.08 20.87     ~ 11 0
3 2XMM J105009.5+573145 Sy1 10 50 09.5330050656 +57 31 43.960092204     20.70     ~ 9 0
4 [VV98] J105016.1+571953 QSO 10 50 15.9565843584 +57 19 54.414164388   21.32 20.85     ~ 13 0
5 [VV98] J105019.8+572812 QSO 10 50 19.7237 +57 28 12.866     18.70     ~ 16 0
6 RDS 56D Sy1 10 50 20.082 +57 14 22.06           ~ 10 0
7 [VV98] J105039.6+572337 QSO 10 50 39.5438741904 +57 23 36.609192456   19.85 19.55 19.14   ~ 46 0
8 RX J1050.7+5717 SyG 10 50 46.02216 +57 17 33.8352           ~ 11 0
9 RDS 67B GrG 10 50 54.3 +57 06 52           ~ 3 0
10 RX J1050.9+5706 SyG 10 50 56.11224 +57 06 48.2004           ~ 7 1
11 [VV98] J105104.0+573054 QSO 10 51 03.930 +57 30 54.72     20.30     ~ 13 0
12 RDS 43A AGN 10 51 05.1 +57 19 23           ~ 10 0
13 2XMM J105108.2+573345 AGN 10 51 08.38 +57 33 45.4           ~ 14 0
14 2XMM J105114.4+571615 AGN 10 51 14.414 +57 16 15.74   22.59 21.61     ~ 10 0
15 RDS 51L AGN 10 51 17.0 +57 15 51           ~ 7 0
16 RDS 46A AGN 10 51 20.10 +57 18 48.9           ~ 12 0
17 RDS 61B AGN 10 51 26.3 +57 11 31           ~ 7 0
18 [BCH2008] 444 PM* 10 51 30.9358892064 +57 34 39.630370584   17.11       M5Ve? 14 0
19 2XMM J105137.3+573043 AGN 10 51 37.302 +57 30 42.98           ~ 13 0
20 SDSS J105148.73+573248.7 AGN 10 51 48.732 +57 32 48.71     23.2 22.90   ~ 26 0
21 2XMM J105154.3+573437 Sy1 10 51 54.377 +57 34 37.79     20.00     ~ 19 0
22 TYC 3826-786-1 PM* 10 52 01.1920926120 +57 10 44.482721340   11.98 10.98     K0V 9 0
23 2MASS J10520626+5715245 AGN 10 52 06.2807459376 +57 15 23.712201684           ~ 11 0
24 2XMM J105216.8+572017 AGN 10 52 16.95 +57 20 18.0           ~ 13 0
25 2XMM J105224.5+573009 AGN 10 52 24.615 +57 30 09.41           ~ 16 0
26 2XMM J105225.0+572304 AGN 10 52 25.046 +57 23 05.19           ~ 13 0
27 [VV98] J105230.1+573913 QSO 10 52 30.0812803008 +57 39 13.483856772   21.75 21.00     ~ 17 0
28 RDS 116 rG 10 52 37.0 +57 30 58     21.8     ~ 11 0
29 7C 104932.20+574659.00 AGN 10 52 37.355 +57 31 03.76       21.25   ~ 18 1
30 RDS 58B GrG 10 52 38.8 +57 13 00           ~ 5 0
31 [VV98] J105239.6+572432 QSO 10 52 39.5958253296 +57 24 31.425574788   18.39 18.07     ~ 76 0
32 2XMM J105242.2+573158 Sy1 10 52 42.38 +57 31 58.3     25.2 25.00   ~ 17 0
33 [VV98] J105243.3+571545 QSO 10 52 43.1559083808 +57 15 44.442070236   20.66 20.46     ~ 24 0
34 [VV98] J105244.8+572123 QSO 10 52 44.7211227504 +57 21 22.457174220   21.18 20.86     ~ 25 0
35 RDS 47A AGN 10 52 45.0 +57 17 33           ~ 8 0
36 2XMM J105247.9+572116 Sy1 10 52 48.0450883248 +57 21 16.654430304   20.84 20.34     ~ 26 0
37 [VV98] J105248.5+571206 QSO 10 52 48.329 +57 12 05.66     21.60     ~ 8 0
38 [VV98] J105257.3+572507 QSO 10 52 57.1388606136 +57 25 06.850948620   22.09 21.48     ~ 23 0
39 [VV98] J105259.3+573030 QSO 10 52 59.163 +57 30 29.98     21.70     ~ 16 0
40 [VV98] J105307.4+571505 QSO 10 53 07.3241878632 +57 15 04.632919200     20.30     ~ 24 0
41 [VV98] J105316.9+573552 QSO 10 53 16.7644541304 +57 35 50.730680004   19.97 19.47     ~ 67 0
42 [VV2010c] J105318.7+572042 AGN 10 53 18.6122820576 +57 20 44.589006888           ~ 10 1
43 MCXC J1053.3+5720 ClG 10 53 18.97 +57 20 44.7           ~ 21 0
44 SDSS J105319.02+571851.8 AGN 10 53 19.023 +57 18 51.81     21.3 20.84   ~ 19 0
45 LEDA 3095998 Sy1 10 53 24.6642123384 +57 12 31.015505340           ~ 16 0
46 2XMM J105329.3+572104 AGN 10 53 29.409 +57 21 04.20           ~ 17 0
47 [VV98] J105331.8+572454 QSO 10 53 31.7346910536 +57 24 54.112156956   20.32 20.20     ~ 22 0
48 2XMM J105334.9+572542 AGN 10 53 35.0308257600 +57 25 42.141068976     19.50     ~ 25 0
49 2XMM J105339.6+573104 Sy1 10 53 39.7417789968 +57 31 04.402572060   19.97 19.79     ~ 23 0
50 [VV98] J105345.0+572840 QSO 10 53 44.864 +57 28 40.36   21.27 21.19     ~ 23 0
51 SDSS J105348.77+573034.0 AGN 10 53 48.774 +57 30 34.08     23.3     ~ 17 0
52 [VV98] J105350.3+572710 QSO 10 53 50.2208736432 +57 27 09.506758536   20.68 20.56     ~ 23 0
53 RDS 20 mul 10 54 10.3 +57 30 39           ~ 4 0
54 RDS 20C * 10 54 10.3337402856 +57 30 37.932944508   18.203 16.848 16.276   M5Ve? 9 0
55 SDSS J105421.19+572544.2 Sy1 10 54 21.1984001400 +57 25 44.284004364       18.80   ~ 42 0
56 RDS 58D G ~ ~           ~ 1 0
57 RDS 48Z G ~ ~           ~ 1 0

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