On the probability of microlensing in gamma-ray burst afterglows

L. V. E. Koopmans, J. Wambsganss

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Abstract

The declining light curve of the optical afterglow of gamma-ray burst (GRB) GRB000301C showed rapid variability with one particularly bright feature at about t−t0 = 3.8 d. This event was interpreted as gravitational microlensing by Garnavich, Loeb & Stanek and subsequently used to derive constraints on the structure of the GRB optical afterglow. In this paper, we use these structural parameters to calculate the probability of such a microlensing event in a realistic scenario, where all compact objects in the universe are associated with observable galaxies.
Original languageEnglish
Pages (from-to)1317-1322
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume325
Issue number4
DOIs
Publication statusPublished - 1-Aug-2001
Externally publishedYes

Keywords

  • GRAVITATIONAL LENSING, DARK MATTER, GAMMA-RAYS: BURSTS, Astrophysics

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