Table 1: Optical and X-ray properties of ULXs. 1-2. main and alternative identification of the ULX candidates analyzed in this work (LM and LB stand for Liu & Mirabel 2005 and Liu & Bregman 2005, respectively); 3-4. X-ray RA (J2000) and Dec (2000) coordinates; 5. Log of the Luminosity in the 2-10 keV band (for object SW78 the quoted luminosity is in the 0.5-8 keV band) assuming that the X-ray sources were at the distance of the parent galaxy; 6-8. identification, morphological type and distance of the parent galaxy; 9. difference in arcsec between X-ray and nominal optical coordinates.
ID Alternative ID RA (J2000) Dec. (J2000) LX ID Gal. Type D $\Delta$
    (hh:mm:ss.s) ($^\circ$:$^\prime$: $^{\prime \prime}$) (erg s-1)     (Mpc) (arcsec)
IXO 29 (LM) ULX1 NGC 1961 05:41:43.3 +69:20:46 40.5 NGC 1961 +5.0 52.40 0.9
IXO 43 (LM) NGC 4151, X1; (LB) NGC4151 X6 12:10:07.9 +39:23:12 39.3 NGC 4151 +2.0 20.30 1.0
IXO 54 (LM) NGC4438 ULX1; (LB) NGC4438 X2 12:27:57.5 +13:02:30 39.9 NGC 4438 +0.0 16.80 5.2
IXO 55 (LM) NGC4472 ULX1 12:29:13.1 +07:57:40 39.1 NGC 4472 -5.0 16.80 3.7
IXO 56 (LM) NGC4472 ULX2 12:29:22.3 +07:53:31 39.4 NGC 4472 -5.0 16.80 2.7
IXO 57 (LM) NGC4472 ULX3; (LB) NGC4472 X5 12:29:23.9 +07:54:00 39.8 NGC 4472 -5.0 16.80 2.7
IXO 70 (LM) NGC4649 ULX4 12:44:07.2 +11:35:25 39.3 NGC 4649 -5.0 14.85 3.5
SW78   12:25:17.17 +18:13:46.7 39.4 NGC 4382 SA(s)0+pec 14.40 0.1


Source LaTeX | All tables | In the text