GRB Spikes Could Resolve Stars

Details GRB Spikes Could Resolve Stars GRB Spikes Could Resolve Stars

1997-12-12

arxiv.org/abs/astro-ph/9712172v1

Astronomy and Astrophysics

Astrophysics

18 pages, 2 figures, in press: ApJ (Letters)

Scientific paper

10.1086/311191

GRBs vary more rapidly than any other known cosmological phenomena. The lower limits of this variability have not yet been explored. Improvements in detectors would reveal or limit the actual rate of short GRBs. Were microsecond "spike" GRBs to exist and be detectable, they would time-resolve stellar mass objects throughout the universe by their gravitational microlensing effect. Analyzing the time structure of sufficient numbers of GRB spikes would reveal or limit $\Omega_{star}$, $\Omega_{MACHO}$, and/or $\Omega_{baryon}$.

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