2004A&A...418..877A

Query : 2004A&A...418..877A

2004A&A...418..877A - Astronomy and Astrophysics, volume 418, 877-883 (2004/5-2)

New optical spectra and general discussion on the nature of ULXs.

ARP H., GUTIERREZ C.M. and LOPEZ-CORREDOIRA M.

Abstract (from CDS):

We present optical spectroscopic observations of three Ultra Luminous X-ray sources (ULXs). Two of them are very close to the active galaxy NGC 720 and the other is near NGC 1073. The two around NGC 720 turn out to be quasars at z=2.216 and z=0.959, the one near NGC 1073 seems to be associated to an HII region at the redshift of NGC 1073. We concentrate our analysis on the two quasars and analyze them in conjunction with a set of 22 additional X-ray sources close to nearby galaxies which also fit the criteria of ULXs and which also have been identified as quasars of medium to high redshift. This sample shows an unusually large fraction of rare BL Lac type objects. The high redshifts of these ULXs and their close proximity to their low redshift, supposedly parent galaxies is a surprising result in the light of standard models. We describe the main properties of each of these objects and their parent galaxy, and briefly discuss possible interpretations.

Abstract Copyright: ∼

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

CDS comments: 1RXS J124828.2+083103 = 1RXS J124828.1+083103 in Simbad.

Simbad objects: 45

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Number of rows : 45
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 QSO B0240+011 QSO 02 43 33.4196856792 +01 21 36.955534500   18.9 18.9     ~ 26 0
6 [VV96] J024333.6+012222 QSO 02 43 33.5422008432 +01 22 21.585033120   19.8 19.6     ~ 9 0
7 IXO 5 ULX 02 43 38.48 +01 24 10.2           ~ 9 1
8 QSO B0241+011 QSO 02 43 39.5450734200 +01 21 09.481687416   19.0 19     ~ 30 0
9 NGC 1073 EmG 02 43 40.598 +01 22 33.13   11.3   11.3 11.8 ~ 326 0
10 NGC 1232 EmG 03 09 45.514 -20 34 45.48   10.67 9.87 9.53 10.2 ~ 289 0
11 QSO B0331-362 BLL 03 33 12.2677895088 -36 19 46.662911112   19.94 18.0 17.99   ~ 59 0
12 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1802 2
13 LEDA 74733 Sy1 03 34 07.9 -36 04 12   19.7 20.10     ~ 17 0
14 NGC 2639 Sy2 08 43 38.0682469032 +50 12 19.942091604 12.90 12.56 11.65     ~ 427 2
15 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5860 6
16 QSO B1117+139 QSO 11 19 46.9449354960 +13 37 59.233468512   19.17 18.91     ~ 36 0
17 QSO B1117+137 QSO 11 20 11.8499553720 +13 31 22.623613896   19.73 19.44 19.2   ~ 11 0
18 QSO J1120+1332 QSO 11 20 14.7428714496 +13 32 27.883456188   19.5 19.83 19.1   ~ 18 0
19 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 827 3
20 QSO J1120+1340 QSO 11 20 26.2050528840 +13 40 24.651681708   19.26 18.98     ~ 37 0
21 SDSS J112039.82+133620.5 QSO 11 20 39.8256487464 +13 36 20.496897432     19.1     ~ 21 0
22 QSO B1118+1352 QSO 11 20 41.567 +13 35 50.29   21.21 20.97     ~ 9 0
23 QSO B1118+1354 QSO 11 21 06.0729705216 +13 38 24.899811756   19.32 19.06     ~ 46 0
24 2XMM J121007.8+392312 AGN 12 10 07.792 +39 23 12.38   19.74 18.79     ~ 12 1
25 QSO B1207+39 BLL 12 10 26.5907045256 +39 29 08.635546104   20.77 20.3 19.9   ~ 114 0
26 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3691 2
27 XMMU J121214.5+131248 X 12 12 14.58 +13 12 47.8   17.8       ~ 5 0
28 NGC 4168 Sy1 12 12 17.2692381408 +13 12 18.688208724 12.58 12.11 11.18     ~ 377 2
29 NGC 4203 LIN 12 15 05.0549203560 +33 11 50.383965120   12.98 11.99     ~ 492 2
30 Ton 1480 QSO 12 15 09.2309649888 +33 09 55.239405012   16.56 16.45     ~ 57 0
31 QSO J1218+472 QSO 12 18 08.5076691864 +47 16 12.796574376   20.09 19.88     ~ 41 0
32 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2364 3
33 RX J121923.6+470938 X 12 19 23.65 +47 09 38.4           ~ 5 0
34 QSO J1219+473 QSO 12 19 51.5 +47 21 09     19.4     ~ 13 0
35 NGC 4319 GiP 12 21 43.8928660008 +75 19 21.030501144   13.0       ~ 150 0
36 Mrk 205 Sy1 12 21 44.0724099888 +75 18 38.241006228   15.64 15.24 14.7   ~ 477 0
37 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1763 2
38 RMB 147 QSO 12 25 11.9141854800 +12 51 53.656142760   18.81 18.48     ~ 46 0
39 NGC 4410 LIN 12 26 28.2946646976 +09 01 11.500520016   13.6 13.20     ~ 113 1
40 NGC 4698 Sy2 12 48 22.9082830584 +08 29 14.667552276   13.24 12.27     ~ 484 0
41 WISE J124825.85+083020.4 BLL 12 48 25.8540 +08 30 20.493     19.60 19.2   ~ 18 0
42 2MASS J12482844+0831127 Sy1 12 48 28.4548402968 +08 31 12.774929232   19.56 18.91     ~ 23 0
43 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2961 4
44 NGC 7319 Sy2 22 36 03.602 +33 58 33.18   14.57 13.53 12.65   ~ 293 0
45 NGC 7603 Sy1 23 18 56.6538277656 +00 14 37.977066096   14.73 14.01     ~ 404 0

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