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Astron. Astrophys. 361, 85-91 (2000)

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1. Introduction

The Wide Field Cameras (WFCs) on board the BeppoSAX satellite carry out an extensive monitoring program of the whole X-ray sky. Various kinds of transient X-ray sources are detected during these observations on time scales between a fraction of a second and months. We here discuss one case which we have followed up with the more sensitive Narrow-Field Instruments (NFI) on board BeppoSAX and with the Kitt Peak National Observatory (KPNO) 2.1 m optical telescope, and whose signature we searched for in data from the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer (RXTE) and in occultation data from the Burst And Transient Source Experiment (BATSE) on the Compton Gamma-Ray Observatory. In all observations we have interesting detections. We describe analyses of WFC (Sect. 2), NFI (Sect. 3), ASM (Sect. 4), BATSE (Sect. 5) and optical data (Sect. 6), point to possible associations of previously found sources of high-energy emission in the field (Sect. 7), and discuss the possible nature of the source (Sect. 8).

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© European Southern Observatory (ESO) 2000

Online publication: September 5, 2000
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