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Astron. Astrophys. 352, 543-546 (1999)

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Research Note

Detection of optical bursts from the transient X-ray source XTE J2123-058 *

C.D. Gneiding 1, J.E. Steiner 1,2 and D. Cieslinski 3

1 Laboratório Nacional de Astrofí sica/CNPq, CP 21, 37500-000 Itajubá, Brazil (clemens@lna.br)
2 Instituto Astronômico e Geofísico, Universidade de São Paulo, CP 9638, 01065-970 São Paulo, Brazil (steiner@lna.br)
3 Instituto Nacional de Pesquisas Espaciais, CP 515, 12201-970 São José dos Campos, Brazil (deo@das.inpe.br)

Received 28 May 1999 / Accepted 9 September 1999


We report the detection of four large optical bursts from the transient X-ray burster XTE J2123-058. This is the third case of detection of optical bursts in an X-ray transient during the active phase; the bursts are recorded with high time resolution and signal-to-noise. The total duration of the bursts is about 80 seconds and the amplitudes vary from 0.7 to 1 magnitude.

Key words: X-rays: stars – X-rays: bursts – stars: individual: XTE J2123-058

* Based on observations made at Laboratório Nacional de Astrofísica/CNPq, Brazil

Send offprint requests to: C.D. Gneiding (clemens@lna.br)

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© European Southern Observatory (ESO) 1999

Online publication: December 2, 1999