Fast X-ray Transients and their relation to GRBs

Details Fast X-ray Transients and their relation to GRBs Fast X-ray Transients and their relation to GRBs

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..526..245a&link_type=abstract

GAMMA-RAY BURSTS: 5th Huntsville Symposium. AIP Conference Proceedings, Volume 526, pp. 245-249 (2000).

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Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays, Observational Cosmology

Scientific paper

Fast X-ray Transients (FXTs) are short duration X-ray sources that have timescales of minutes to hours. They have been observed by many instruments, from HEAO-1 to BeppoSAX, however, they are still unexplained. Due to their wide range of observational characteristics, it is suspected that FXTs are a heterogeneous collection of objects involving different emission mechanisms. The relationship between FXTs and gamma-ray bursts (GRBs) is particularly intriguing. The results of BeppoSAX observations confirm that some but not all fast X-ray transients are counterparts of gamma-ray bursts. A fraction of ``classical'' FXT are believed to be counterparts of GRBs, based largely on time coincidences with GRB events. Other FXTs might be ``gamma-ray silent'' GRBs. We discuss the statistics and distribution of FXTs, and compare their characteristics with GRB prompt counterparts and afterglows. .

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