2006A&A...454...77L

Query : 2006A&A...454...77L

2006A&A...454...77L - Astronomy and Astrophysics, volume 454, 77-84 (2006/7-4)

Toward a clean sample of ultra-luminous X-ray sources.

LOPEZ-CORREDOIRA M. and GUTIERREZ C.M.

Abstract (from CDS):

Observational follow-up programmes for the characterization of ultra-luminous X-ray sources (ULXs) require the construction of clean samples of such sources in which the contamination by foreground/background sources is minimum. We calculate the degree of foreground/background contaminants among the ULX sample candidates in a published catalogue and compare these computations with available spectroscopic identifications. We use statistics based on known densities of X-ray sources and AGN/QSOs selected in the optical. The analysis is done individually for each parent galaxy. The existing identifications of the optical counterparts are compiled from the literature. More than a half of the ULXs, within twice the distance of the major axis of the 25mag/arcsec2 isophote from RC3 nearby galaxies and with X-ray luminosities LX[2-10keV]≥1039erg/s, are expected to be high redshift background QSOs. A list of 25 objects (clean sample) confirmed to be real ULXs or to have a low probability of being contaminant foreground/background objects is provided.

Abstract Copyright: ∼

Journal keyword(s): galaxies: statistics - galaxies: quasars: general

Simbad objects: 158

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Number of rows : 158
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 [VV2006] J015249.7-134211 QSO 01 52 49.7 -13 42 11     20.6     ~ 8 1
2 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 387 0
3 NGC 720 Sy1 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 522 0
4 [VV2006] J015302.9-134653 QSO 01 53 03.0334590552 -13 46 54.379859628   19.01 19.2 19.21   ~ 10 1
5 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1666 2
6 [LB2005] NGC 891 ULX3 UX? 02 22 45.55 +42 25 57.8           ~ 7 1
7 NGC 1042 EmG 02 40 23.9724818544 -08 26 00.736256616 11.47 11.56 11.02 11.7 11.4 ~ 260 1
8 2XMM J024025.6-082428 X 02 40 25.62 -08 24 28.9           ~ 14 1
9 QSO B0240+011 QSO 02 43 33.4196856792 +01 21 36.955534500   18.9 18.9     ~ 26 0
10 IXO 5 ULX 02 43 38.48 +01 24 10.2           ~ 9 1
11 QSO B0241+011 QSO 02 43 39.5450734200 +01 21 09.481687416   19.0 19     ~ 30 0
12 NGC 1073 EmG 02 43 40.598 +01 22 33.13   11.3   11.3 11.8 ~ 326 0
13 [LFF2012] 55 UX? 03 17 13.82 -41 10 34.6           ~ 10 1
14 NGC 1269 EmG 03 17 18.5785534752 -41 06 28.628735184 9.85 9.83 8.81 8.72   ~ 422 1
15 NGC 1313 AG? 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 687 2
16 RX J031820.3-662911 UX? 03 18 20.00 -66 29 10.9           ~ 211 1
17 2E 756 ULX 03 18 22.00 -66 36 04.3   23.5 23.6     O9.5 238 3
18 2XMM J032159.8-370509 QSO 03 21 59.8908618624 -37 05 09.228729156           ~ 8 1
19 2XMM J032240.4-371639 AGN 03 22 40.44 -37 16 41.8           ~ 8 1
20 NGC 1316 BL? 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1387 1
21 CXOU J032251.2-370949 UX? 03 22 51.22 -37 09 49.5           ~ 8 1
22 [LB2005] NGC 1316 ULX3 UX? 03 22 57.45 -37 15 56.0           ~ 5 1
23 [LB2005] NGC 1316 ULX6 UX? 03 23 14.33 -37 16 54.5           ~ 5 1
24 [LB2005] NGC 1316 ULX7 QSO 03 23 28.9 -37 10 11           ~ 7 1
25 [S99c] 2 QSO 03 33 11.63 -36 11 32.7   20.8       ~ 7 2
26 2XMM J033312.8-361152 QSO 03 33 12.85 -36 11 50.4   19.8       ~ 8 1
27 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1799 2
28 LEDA 74733 Sy1 03 34 07.9 -36 04 12   19.7 20.10     ~ 17 0
29 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1569 1
30 [CHP2004] J033831.7-352600 XB* 03 38 31.8 -35 26 01           ~ 6 1
31 IXO 18 X 03 38 32.7 -35 27 01           ~ 2 1
32 2XMM J033841.3-353134 BLL 03 38 41.3762024712 -35 31 34.142874132   20.93   19.51   ~ 11 1
33 2XMM J033851.6-352644 QSO 03 38 51.6053313552 -35 26 44.384689176           ~ 11 1
34 ESO 358-49 GiP 03 40 08.6854 -35 37 34.647   13.44   12.68 13.3 ~ 110 1
35 [LB2005] NGC 1427A ULX1 UX? 03 40 12.20 -35 37 34.7           ~ 4 1
36 [SST2011] J034555.61+680455.3 ULX 03 45 55.612 +68 04 55.29           ~ 167 1
37 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1514 1
38 IXO 23 X 04 15 51.9 -55 49 01           ~ 2 1
39 NGC 1553 GiP 04 16 10.4697802536 -55 46 48.072797400 10.76 10.10 9.40 8.74   ~ 377 2
40 [LB2005] NGC 1566 ULX1 UX? 04 19 56.11 -54 56 38.3           ~ 3 1
41 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 910 2
42 IXO 25 X 04 45 30.9 -59 14 55           ~ 3 1
43 IXO 26 X 04 45 33.6 -59 14 41           ~ 3 1
44 NGC 1672 SyG 04 45 42.552 -59 14 50.68 10.29 10.53 9.68 9.53 10.2 ~ 399 1
45 [LB2005] NGC 1672 ULX2 UX? 04 45 52.87 -59 14 59.1           ~ 6 1
46 [LB2005] NGC 1792 ULX2 UX? 05 05 11.01 -37 58 44.6           ~ 4 1
47 NGC 1792 Sy1 05 05 14.4036930408 -37 58 50.064531168   10.68 10.18 9.53 10.4 ~ 233 1
48 IXO 29 QSO 05 41 43.2905722584 +69 20 46.008980520           ~ 5 1
49 NGC 1961 LIN 05 42 04.6327819680 +69 22 42.411028872   11.73 10.99     ~ 337 3
50 2XMM J061515.0+710203 AGN 06 15 15.1 +71 02 03           ~ 13 1
51 Mrk 3 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 916 3
52 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 768 2
53 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 193 2
54 NGC 2775 AG? 09 10 20.1334093488 +07 02 16.874157048   11.417 10.481 9.920 8.994 ~ 355 0
55 [VV2006] J091019.9+070600 QSO 09 10 20.2008368838 +07 05 56.918038244           ~ 9 1
56 [VV2006] J091027.0+065910 QSO 09 10 27.0 +06 59 10           ~ 8 1
57 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4443 3
58 RX J0957.9+6903 ULX 09 57 53.290 +69 03 48.20           ~ 230 4
59 2MASS J10232594+1956168 LM* 10 23 25.9520713848 +19 56 16.874788560           M6V 11 1
60 NGC 3226 GiP 10 23 27.0064075320 +19 53 54.674937420   14.32 13.33     ~ 428 1
61 IXO 36 X 10 27 37.6 -43 53 08           ~ 3 1
62 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 847 2
63 ICRF J103739.7-270526 Sy1 10 37 39.72761676 -27 05 26.4814605           ~ 21 1
64 IC 2597 GiG 10 37 47.3320133088 -27 04 52.576660812   12.75   11.08   ~ 104 0
65 [BWC2008] U13 ULX 10 38 42.86 +53 31 06.6           ~ 7 1
66 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 772 1
67 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 840 0
68 QSO B1117+139 QSO 11 19 46.9449354960 +13 37 59.233468512   19.17 18.91     ~ 36 0
69 QSO B1117+137 QSO 11 20 11.8499553720 +13 31 22.623613896   19.73 19.44 19.2   ~ 11 0
70 [BWC2008] U17 ULX 11 20 15.5 +13 35 25           ~ 8 1
71 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 825 3
72 QSO J1120+1340 QSO 11 20 26.2050528840 +13 40 24.651681708   19.26 18.98     ~ 37 0
73 QSO B1118+1354 QSO 11 21 06.0729705216 +13 38 24.899811756   19.32 19.06     ~ 46 0
74 [VV2006] J115057.9-290043 QSO 11 50 57.8200802976 -28 44 01.259291688           ~ 10 4
75 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 439 1
76 IXO 41 X 12 01 40.4 +62 19 58           ~ 3 1
77 UGC 7009 GiP 12 01 44.304 +62 19 41.02   14.5       ~ 52 0
78 IXO 42 X 12 05 32.8 +50 32 43           ~ 4 1
79 NGC 4088 GiP 12 05 34.2230093952 +50 32 21.064017876   11.2       ~ 407 1
80 2XMM J121007.8+392312 AGN 12 10 07.792 +39 23 12.38   19.74 18.79     ~ 12 1
81 SDSS J121022.39+392316.8 QSO 12 10 22.4024234856 +39 23 16.816922304           ~ 20 1
82 QSO B1207+39 BLL 12 10 26.5907045256 +39 29 08.635546104   20.77 20.3 19.9   ~ 114 0
83 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3687 2
84 NGC 4168 Sy1 12 12 17.2692381408 +13 12 18.688208724 12.58 12.11 11.18     ~ 376 2
85 NGC 4203 LIN 12 15 05.0549203560 +33 11 50.383965120   12.98 11.99     ~ 492 2
86 [VV2006] J121515.7+331020 QSO 12 15 15.6128618256 +33 10 13.279268928   19.46 19.13     ~ 10 1
87 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 918 2
88 [SW2006b] 5 UX? 12 18 56.34 +14 24 18.1           ~ 8 1
89 RX J121923.6+470938 X 12 19 23.65 +47 09 38.4           ~ 5 0
90 NGC 4319 GiP 12 21 43.8928660008 +75 19 21.030501144   13.0       ~ 150 0
91 Mrk 205 Sy1 12 21 44.0724099888 +75 18 38.241006228   15.64 15.24 14.7   ~ 477 0
92 [LB2005] NGC 4321 X6 X 12 22 42.80 +15 44 00.5           ~ 5 1
93 [LB2005] NGC 4321 X7 X 12 22 48.23 +15 43 05.8           ~ 5 1
94 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1844 2
95 [LB2005] NGC 4321 X4 X 12 23 08.47 +15 51 22.9           ~ 4 1
96 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1762 2
97 IXO 50 X 12 25 05.1 +12 53 06           ~ 4 1
98 RMB 147 QSO 12 25 11.9141854800 +12 51 53.656142760   18.81 18.48     ~ 46 0
99 [LB2005] NGC 4374 X3 X 12 25 15.52 +12 56 05.6           ~ 4 1
100 IXO 52 AGN 12 25 16.8 -39 43 26           ~ 5 1
101 NGC 4373 GiG 12 25 17.8183715160 -39 45 35.245218672   11.59 11.05 10.09   ~ 115 1
102 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1177 1
103 [SST2011] J122601.44+333131.1 UX? 12 26 01.53 +33 31 30.6           ~ 37 1
104 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 635 2
105 2MASS J12275718+1302327 QSO 12 27 57.1948608984 +13 02 32.836408728   19.47 19.06     ~ 16 1
106 2XMM J122912.8+075741 QSO 12 29 12.8853122112 +07 57 41.656943448   20.99 20.53     ~ 7 1
107 SDSS J122922.15+075332.5 QSO 12 29 22.1469707352 +07 53 32.509690692           ~ 16 1
108 SDSS J122923.73+075359.2 QSO 12 29 23.7380586744 +07 53 59.242483248   19.58 19.39     ~ 34 1
109 [VV2006] J122927.9+080634 QSO 12 29 27.6 +08 06 41           ~ 6 1
110 IXO 59 X 12 29 35.1 +08 09 37           ~ 3 1
111 [LB2005] NGC 4472 X3 BH? 12 29 39.73 +07 53 30.6           ~ 28 2
112 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2092 2
113 IXO 61 X 12 30 06.7 +08 02 05           ~ 3 1
114 RX J1230.5+4141 ULX 12 30 30.34 +41 41 41.0           ~ 24 2
115 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 284 2
116 IXO 63 X 12 35 19.2 +12 33 17           ~ 3 1
117 [LB2005] NGC 4552 X2 X 12 35 29.42 +12 31 05.9           ~ 4 1
118 M 89 LIN 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 995 2
119 RX J123551+27561 ULX 12 35 51.71 +27 56 04.1           ~ 75 1
120 NGC 4559 H2G 12 35 57.6402869976 +27 57 35.859278160   10.46 10.01     ~ 628 1
121 RX J123558+27577 UX? 12 35 58.56 +27 57 41.9           ~ 38 2
122 RX J1236.2+2558 ULX 12 36 17.45 +25 58 53.1           ~ 12 1
123 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 956 0
124 [SST2011] J124155.56+323216.9 HXB 12 41 55.56 +32 32 16.9           ~ 23 2
125 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1095 2
126 [VV2006] J124336.8+113006 QSO 12 43 36.2 +11 30 08           ~ 6 1
127 M 60 GiP 12 43 39.9680 +11 33 09.696   10.3       ~ 1348 1
128 SDSS J124406.96+113524.2 QSO 12 44 06.9655740552 +11 35 24.245864196   19.81 19.53     ~ 35 1
129 [VV2006] J124409.2+113336 QSO 12 44 08.9599170576 +11 33 34.068772584   19.86 19.78     ~ 17 1
130 NGC 4698 Sy2 12 48 22.9082830584 +08 29 14.667552276   13.24 12.27     ~ 483 0
131 Mrk 59 AGN 12 59 00.288 +34 50 42.45           ~ 317 2
132 IXO 72 X 12 59 00.9 +34 50 42           ~ 7 1
133 CXOU J125901.8+345115 UX? 12 59 02.00 +34 51 12.0           ~ 10 1
134 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 383 2
135 [BWC2008] U33 ULX 13 15 19.8 +42 02 55           ~ 6 1
136 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1223 2
137 UCAC4 235-066507 Y*? 13 25 07.4612340336 -43 04 09.338861604   15.585 14.000 13.633   ~ 18 0
138 [BWC2008] U35 ULX 13 25 19.87 -43 03 17.1           ~ 18 1
139 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4481 3
140 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 471 0
141 [FK2005] 23 ULX 13 29 38.62 +58 25 05.6           ~ 128 2
142 RX J132939+47126 HXB 13 29 39.48 +47 12 43.6   22.59 23.27   24.80 ~ 30 1
143 RX J132943+47115 UX? 13 29 43.31 +47 11 34.8   23.20 24.01   25.50 ~ 30 1
144 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4327 4
145 RX J133001+47137 UX? 13 30 01.01 +47 13 43.9           ~ 86 0
146 RX J133007+47110 UX? 13 30 07.55 +47 11 06.1   25.17 25.49   26.04 ~ 67 1
147 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2571 2
148 RX J133719-29536 ULX 13 37 20.12 -29 53 47.7           ~ 24 2
149 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2911 2
150 2E 1402.4+5440 UX? 14 04 14.28 +54 26 03.6           ~ 25 1
151 [VV2006] J145344.7+033330 QSO 14 53 44.6828541168 +03 33 30.160875780   20.67 19.72     ~ 9 1
152 NGC 5775 GiP 14 53 57.653 +03 32 40.10   13.0 11.34     ~ 434 2
153 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2526 2
154 IXO 85 UX? 20 35 00.11 +60 09 08.5           ~ 26 1
155 NGC 7314 Sy2 22 35 46.1985355872 -26 03 01.564993476   11.62 13.11 10.61 11.4 ~ 564 0
156 [LB2005] NGC 7314 ULX1 UX? 22 35 48.13 -26 01 28.2           ~ 5 1
157 NGC 7590 Sy1 23 18 54.7949760192 -42 14 20.515300476   12.12 13.76 11.06 11.8 ~ 276 1
158 IXO 87 X 23 18 55.9 -42 13 53           ~ 4 1

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