Properties of Supergiant Fast X-ray Transients as observed by Swift
Abstract
We present the most recent results from our investigation on Supergiant Fast X-ray Transients, a class of High-Mass X-ray Binaries, with a possible counterpart in the gamma-ray energy band. Since 2007 Swift has contributed to this new field by detecting outbursts from these fast transients with the BAT and by following them for days with the XRT. Thus, we demonstrated that while the brightest phase of the outburst only lasts a few hours, further activity is observed at lower fluxes for a remarkably longer time, up to weeks. Furthermore, we have performed several campaigns of intense monitoring with the XRT, assessing the fraction of the time these sources spend in each phase, and their duty cycle of inactivity.
Keywords
Cite
@article{arxiv.1111.0698,
title = {Properties of Supergiant Fast X-ray Transients as observed by Swift},
author = {P. Romano and S. Vercellone and H. A. Krimm and P. Esposito and G. Cusumano and V. La Parola and V. Mangano and J. A. Kennea and D. N. Burrows and C. Pagani and N. Gehrels},
journal= {arXiv preprint arXiv:1111.0698},
year = {2011}
}
Comments
2011 Fermi Symposium proceedings - eConf C110509; 6 pages, 4 figures, 2 tables