Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG

M. G. Watson, T. P. Roberts, M. Akiyama, Y. Ueda

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy KUG 0214-057 in XMM-Newton observations. The location of these X-ray sources strongly suggests that at least three, and possibly four, of these may be physically related to the galaxy. The luminosity of each of these sources at the distance of KUG 0214-057 is >5 × 1039 erg s-1 (0.3-10 keV), making each a strong candidate ultraluminous X-ray source (ULX). Using the ULXs objects as a metric implies that this relatively low-mass galaxy may be experiencing rather intense starburst activity. The serendipitous discovery of these ULXs objects suggests that such objects are not a negligible component of the overall extragalactic X-ray source population.

Original languageEnglish
Pages (from-to)899-904
Number of pages6
JournalAstronomy and Astrophysics
Issue number3
Publication statusPublished - 2005 Jul
Externally publishedYes


  • Galaxies: starburst
  • X-rays: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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