2008A&A...486..151G


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.30CEST14:55:51

2008A&A...486..151G - Astronomy and Astrophysics, volume 486, 151-163 (2008/7-4)

The ultraluminous X-ray source NGC 1313 X-2. Its optical counterpart and environment.

GRISE F., PAKULL M.W., SORIA R., MOTCH C., SMITH I.A., RYDER S.D. and BOETTCHER M.

Abstract (from CDS):

NGC 1313 X-2 is one of the brightest ultraluminous X-ray sources in the sky, at both X-ray and optical wavelengths; therefore, quite a few studies of available ESO VLT and HST data have appeared in the literature. Here, we present our analysis of VLT/FORS1 and HST/ACS photometric data, confirming the identification of the B∼23mag blue optical counterpart. We show that the system is part of a poor cluster with an age of 20Myr, leading to an upper mass limit of some 12M for the mass donor. We attribute the different results with respect to earlier studies to the use of isochrones in the F435W and F555W HST/ACS photometric system that appear to be incompatible with the corresponding Johnson B and V isochrones. The counterpart exhibits significant photometric variability of about 0.2mag amplitude, both between the two HST observations and during the one month of monitoring with the VLT. This includes variability within one night and suggests that the light is dominated by the accretion disk in the system and not by the mass donor.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 1313 - accretion, accretion disks - black hole physics - galaxies: star clusters - X-rays: binaries - X-rays: individual: NGC 1313 X-2

Status at CDS:  

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 CXOU J013651.1+154547 UX? 01 36 51.06 +15 45 46.8           ~ 25 0
2 NGC 1313 G 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 595 2
3 2E 756 ULX 03 18 22.00 -66 36 04.3   23.5 23.6     O9.5 182 3
4 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1227 0
5 X LMC X-2 LXB 05 20 28.04 -71 57 53.3 17.20 18.00 18.0     ~ 169 0
6 SA 101- reg 09 57 28.2 -00 19 39           ~ 73 0
7 RX J0957.9+6903 ULX 09 57 53.290 +69 03 48.20           ~ 194 4
8 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1270 1
9 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1547 0
10 NGC 4039 GiP 12 01 53.8 -18 53 06   11.08   9.77   ~ 1126 1
11 NGC 4395 Sy2 12 25 48.8639154223 +33 32 48.694684028 10.84 10.54 10.11 9.98   ~ 975 1
12 RX J123551+27561 ULX 12 35 51.71 +27 56 04.1           ~ 60 1
13 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1788 0
14 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2876 0
15 NAME Gould Belt PoG ~ ~           ~ 702 1

    Equat.    Gal    SGal    Ecl

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2020.03.30-14:55:51

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