2001MNRAS.325L...7R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:37:45

2001MNRAS.325L...7R - Mon. Not. R. Astron. Soc., 325, L7-L11 (2001/August-1)

The identification of an optical counterpart to the super-Eddington X-ray source NGC 5204 X-1.

ROBERTS T.P., GOAD M.R., WARD M.J., WARWICK R.S., O'BRIEN P.T., LIRA P. and HANDS A.D.P.

Abstract (from CDS):

We report the identification of a possible optical counterpart to the super-Eddington X-ray source NGC 5204 X-1. New Chandra data show that the X-ray source is point-like, with a luminosity of 5.2x1039erg.s–1 (0.5-8keV). It displays medium- and long-term X-ray variability in observations spanning a period of 20yr. The accurate Chandra position allows us to identify a blue optical continuum source (mv=19.7) at the position of NGC 5204 X-1, using newly obtained optical data from the INTEGRAL instrument on the William Herschel Telescope. The X-ray and optical source properties are consistent with the scenario in which we are observing the beamed X-ray emission of a high-mass X-ray binary in NGC 5204, composed of an O star with either a black hole or neutron star companion.

1A note on taxonomy: we refer to the class of LX>1039erg.s–1 extra-nuclear sources as SESs throughout this Letter. This class of object is alternatively referred to as SLS, IXOs or ultra-luminous compact X-ray sources (ULXs) in the literature, although the last acronym refers in particular to objects suspected to be powered by accretion.

2The positional error radius is a combination of the ≲1arcsec Chandra positional error and a similar error on the INTEGRAL position, which in practice encompasses the central fibre plus its six immediate neighbours.

3We note that, although O-star spectra generally display absorption features, these are low-contrast features and we do not have the signal-to-noise ratio to distinguish them in the current optical spectrum.


Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): galaxies: individual: NGC 5204 - galaxies: stellar content - X-rays: galaxies

Nomenclature: Fig.1: [RGW2001] JHHMMSS.s+DDMMSS N=1.

Simbad objects: 15

goto Full paper

goto View the reference in ADS

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 [RW2000] NGC 891 X-3 X 02 22 31.5 +42 19 54           ~ 2 0
2 NAME Cas 2 GiG 02 56 51.6375962677 +58 54 42.158686700           ~ 75 0
3 [SST2011] J034555.61+680455.3 ULX 03 45 55.612 +68 04 55.29           ~ 141 1
4 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 700 2
5 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5367 6
6 SN 1979C SN* 12 22 58.58 +15 47 52.7   11.6       SNIIL 550 1
7 [RW2000] NGC 4321 X-4 X 12 22 58.9 +15 47 49           ~ 2 0
8 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 425 0
9 [MF97] NGC 5204 3 SNR 13 29 37.0 +58 24 26           ~ 2 0
10 [FK2005] 23 ULX 13 29 38.62 +58 25 05.6           ~ 109 2
11 [RGW2001] J132940.3+582454 X 13 29 40.3 +58 24 54           ~ 3 0
12 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3833 4
13 QSO B1634+7037 QSO 16 34 28.9917493918 +70 31 32.394595988   14.90 14.66     ~ 260 0
14 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1719 1
15 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2310 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001MNRAS.325L...7R and select 'bookmark this link' or equivalent in the popup menu


2020.10.21-15:37:46

© Université de Strasbourg/CNRS

    • Contact