Swift monitoring of Supergiant Fast X-ray Transients: the out-of-outburst behaviour and the flares from IGRJ17544-2916 and XTEJ1739-302

  title={Swift monitoring of Supergiant Fast X-ray Transients: the out-of-outburst behaviour and the flares from IGRJ17544-2916 and XTEJ1739-302},
  author={L. Sidoli and P. Romano and G. Cusumano and V. Mangano and S. Vercellone and A. Paizis and A. Pellizzoni and J. Kennea and D. Burrows and H. Krimm and N. Gehrels and C. Guidorzi and P. E. I. Milano and Italy -INAFIASF Palermo and Italy INAF-OAC and Capoterra and Italy -PSU and Usa -CRESSTGSFCUSRA and Usa -NASAGSFC -INAFOAB Merate and Italy -DPA and U. Leicester and UK.},
  journal={arXiv: Astrophysics},
Supergiant Fast X-ray Transients (SFXTs) are a sub-class of High Mass X-ray Binaries (HMXBs) associated with OB supergiant companions and displaying transient X-ray activity. This behaviour is quite surprising since HMXBs hosting supergiants were known to be persistent sources, until the INTEGRAL discoveries obtained by means of the monitoring of the Galactic plane. We have been performing a monitoring campaign with Swift of four SFXTs with the main aim of characterizing both the long-term… Expand
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