Distortion of gamma-ray burst light curves by gravitational microlensing

L. L.R. Williams, R. A.M.J. Wijers

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

If they are located at cosmological distances, a small fraction of gamma-ray bursts should be multiply imaged by intervening galaxies or clusters, resulting in the appearance of two very similar bursts from the same location with a relative time delay of hours to a year. We show that microlensing by individual stars in the lensing galaxy can smear out the light curves of the multiply imaged bursts on millisecond time-scales. Therefore, in deciding whether two bursts are similar enough to qualify as multiple images, one must look at time-scales longer than a few tens of milliseconds, since shorter time-scales are possibly rendered dissimilar by microlensing.

Original languageEnglish (US)
Pages (from-to)L11-L16
JournalMonthly Notices of the Royal Astronomical Society
Volume286
Issue number1
DOIs
StatePublished - 1997

Keywords

  • Gamma
  • Gravitational lensing
  • Rays: bursts

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