Abstract

Abstract During the whole operational lifetime of the BeppoSAX X-ray satellite, the Galactic bulge region was monitored in the 2–28 keV band through dedicated observational campaigns and serendipitous secondary pointings by the Wide Field Cameras. Since the high mass binary 4U 1700–377 was in the field of view whenever a Camera pointed to the Galactic centre region, a large record of observations of this interesting source is available. In this paper, the results of a preliminary analysis of this WFC data set are presented. In particular, we focus on longer measurements when 4U 1700–377 was close to the FOV centre. The data shows pronounced variability, characterised by hour-long flaring episodes, and general spectral variability, in one case also in coincidence with a flaring event. A simple analysis of the time characteristics of the observed flares suggests these events can be roughly grouped in two different classes.

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