INTEGRAL observations of recurrent fast X-ray transient sources
摘要
Fast X-ray Transients (FXTs) are believed to be non-recurrent bright X-ray sources lasting less than a day and occuring at serendipitous positions, they can best detected and discovered by instruments having a sufficiently wide field of view and high sensitivity. The IBIS/ISGRI instrument onboard INTEGRAL is particularly suited to detect new or already known fast X-ray transient sources. We report on IBIS/ISGRI detection of newly discovered outbursts of three fast transient sources located at low Galactic latitude: SAX J1818.6-1703; IGR J16479-4514; IGR J17391-302/XTE J1739-302. The reported results confirm and strengthen the very fast transient nature of these sources, given that all their newly detected outbursts have a duration less than about 3 hours. Additionally, they provide the first evidence for a possible recurrent fast transient behaviour as all three sources were detected in outburst by ISGRI more than once during the last 2 years.
引用
@article{arxiv.astro-ph/0509018,
title = {INTEGRAL observations of recurrent fast X-ray transient sources},
author = {V. Sguera and E. J. Barlow and A. J. Bird and D. J. Clark and A. J. Dean and A. B. Hill and L. Moran and S. E. Shaw and D. R. Willis and A. Bazzano and P. Ubertini and A. Malizia},
journal= {arXiv preprint arXiv:astro-ph/0509018},
year = {2009}
}
备注
11 pages, 11 figures, 4 tables, accepted for publication in A&A