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Astron. Astrophys. 322, 229-233 (1997)

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ASCA X-ray observations of the Galactic bulge source SLX 1735-269

P. David 1, A. Goldwurm 1, T. Murakami 2, J. Paul 1, P. Laurent 1 and P. Goldoni 3

1 Service d'Astrophysique, DAPNIA/DSM/CEA, Centre d'Etudes de Saclay, F-91191 Gif-sur-Yvette, France
2 Institute of Space and Astronautical Science, 3-1-1, Yoshinodai, Sagamihara, Kanagawa, 299 Japan
3 Instituto di Fisica Cosmica, V. Bassini 15, I-20133, Milano, Italy

Received 25 April 1996 / Accepted 16 November 1996

Abstract

SLX 1735-269 is among the 10 persistent, high energy, SIGMA sources which contribute significantly to the last five year averaged [FORMULA] /X-ray emission from the direction of the Galactic Center. Detailed study of the source has only been carried out recently from data collected by SIGMA in the 35-150 keV range without successfully establishing the nature of SLX 1735-269, consequently observations with ASCA from 0.6-10 keV were performed with the aim of determining the nature of this source. The spectrum of SLX 1735-269 can be described by a powerlaw-absorber model, of photon index [FORMULA]. No period was determined from the data by epoch folding in the range 10 to 1000 s nor from a power spectrum analysis in the range 125 ms to 64 s and upper limits to pulsation are derived. Yet the nature of SLX 1735-269 remains to be determined.

Key words: X-rays: stars - individual: SLX 1735-269 – gamma rays: observations

Send offprint requests to: P. David

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© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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