Volume 406, Number 2, August I 2003
|Page(s)||L27 - L31|
|Published online||17 November 2003|
Letter to the Editor
Yet another galaxy identification for an ultraluminous X-ray source*
Istituto di Astrofisica Spaziale e Fisica Cosmica – Sezione di Bologna, CNR, via Gobetti 101, 40129, Bologna, Italy
2 INTEGRAL Science Data Centre, Chemin d'Ecogia 16, 1290 Versoix, Switzerland
3 The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA
Corresponding author: N. Masetti, email@example.com
Accepted: 22 May 2003
We report on the identification of the optical and infrared counterparts of the ultraluminous X-ray source (ULX) XMMU J121214.5+131248 (NGC4168-ULX1). The optical spectrum yields a redshift of , which implies that the ULX is not associated with the nearby galaxy NGC 4168, but rather with a background object. Optical spectral line ratios and the spectral energy distribution constructed from the available data indicate that the source is likely a starburst nucleus.
Key words: galaxies: distances and redshifts / galaxies: photometry / galaxies: starburst
© ESO, 2003
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