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The optical counterpart of the ultraluminous X-ray source NGC 5204 X-1

The optical counterpart of the ultraluminous X-ray source NGC 5204 X-1
The optical counterpart of the ultraluminous X-ray source NGC 5204 X-1
We use archival HST/WFPC2 V and I band images to show that the optical counterpart to the ultra-luminous x-ray source NGC 5204 X-1, reported by Roberts et al., is composed of two sources separated by 0.5" We have also identified a third source as a possible counterpart, which lies 0.8" from the nominal x-ray position. PSF fitting photometry yields V-band magnitudes of 20.3, 22.0 and 22.4 for the three sources. The V-I band colours are 0.6, 0.1, and -0.2, respectively (i.e. the fainter sources are bluer). We find that all V-I colours and luminosities are consistent with those expected for young stellar clusters (age <10 Myr).
accretion, accretion discs, black hole physics, galaxies: photometry, galaxies: star clusters, X-rays: binaries, X-rays: individual: NGC 5204 X-1
0035-8711
L67-L70
Goad, M.R.
24d2dc27-9bf7-481b-85cf-2d96fd54c17b
Roberts, T.P.
80f812f2-a41b-46d2-9aa2-04a33577e62e
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Lira, P.
f209900c-34b4-4225-b87a-d53855819b7f
Goad, M.R.
24d2dc27-9bf7-481b-85cf-2d96fd54c17b
Roberts, T.P.
80f812f2-a41b-46d2-9aa2-04a33577e62e
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Lira, P.
f209900c-34b4-4225-b87a-d53855819b7f

Goad, M.R., Roberts, T.P., Knigge, C. and Lira, P. (2002) The optical counterpart of the ultraluminous X-ray source NGC 5204 X-1. Monthly Notices of the Royal Astronomical Society, 335 (3), L67-L70. (doi:10.1046/j.1365-8711.2002.05852.x).

Record type: Article

Abstract

We use archival HST/WFPC2 V and I band images to show that the optical counterpart to the ultra-luminous x-ray source NGC 5204 X-1, reported by Roberts et al., is composed of two sources separated by 0.5" We have also identified a third source as a possible counterpart, which lies 0.8" from the nominal x-ray position. PSF fitting photometry yields V-band magnitudes of 20.3, 22.0 and 22.4 for the three sources. The V-I band colours are 0.6, 0.1, and -0.2, respectively (i.e. the fainter sources are bluer). We find that all V-I colours and luminosities are consistent with those expected for young stellar clusters (age <10 Myr).

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More information

Published date: 2002
Keywords: accretion, accretion discs, black hole physics, galaxies: photometry, galaxies: star clusters, X-rays: binaries, X-rays: individual: NGC 5204 X-1

Identifiers

Local EPrints ID: 42062
URI: http://eprints.soton.ac.uk/id/eprint/42062
ISSN: 0035-8711
PURE UUID: 384dc697-9db4-4adf-ab9e-e6528cdebb58

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Date deposited: 13 Nov 2006
Last modified: 09 Nov 2021 08:32

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Contributors

Author: M.R. Goad
Author: T.P. Roberts
Author: C. Knigge
Author: P. Lira

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