BeppoSAX-WFCs monitoring of the high-mass X-ray binary 4U 1700-377

Details BeppoSAX-WFCs monitoring of the high-mass X-ray binary 4U 1700-377 BeppoSAX-WFCs monitoring of the high-mass X-ray binary 4U 1700-377

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132..592c&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 132, p. 592-595.

Physics

Nuclear Physics

Scientific paper

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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