Computer Science
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1358..195r&link_type=abstract
GAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 195-198 (2011).
Computer Science
Gamma-Rays, Pulsars, Telescopes, Black Holes, Gamma-Ray, Pulsars, X- And Gamma-Ray Telescopes And Instrumentation, Black Holes
Scientific paper
The majority of short gamma-ray bursts (SGRBs) are thought to originate from the merger of compact binary systems collapsing directly to form a black hole (BH). However it has been proposed that both SGRBs and long gamma-ray bursts (LGRBs) may, on rare occasions, form an unstable millisecond pulsar (magnetar) prior to final collapse.
GRB 090515, detected by the Swift Satellite, was extremely short (T90 = 0.036+/-0.016 s) and had a very low fluence (2×10-8 erg cm-2 s-1). Additionally, it had a faint optical afterglow of magnitude r ~26.4 at 1.7 hours after the burst. Despite this, the 0.3-10 keV flux in the first 200 s was the highest observed for a SGRB by the Swift X-ray Telescope (XRT). The X-ray light curve showed an unusual plateau and steep decay, becoming undetectable after ~500 s. This behaviour is similar to that observed in some LGRBs proposed to have magnetars contributing to their emission.
O'Brien Thomas P.
Rowlinson A.
Tanvir Nial R.
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