Femtolensing of gamma-ray bursters

Details Femtolensing of gamma-ray bursters Femtolensing of gamma-ray bursters

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386l...5g&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 386, Feb. 10, 1992, p. L5-L7.

Mathematics

Logic

57

Dark Matter, Gamma Ray Bursts, Gravitational Lenses, Energy Spectra, Gamma Ray Observatory, Halos, Milky Way Galaxy

Scientific paper

If gamma-ray bursters are at cosmological distances, they can be used to probe for 'femtolenses', extremely small (about 10 exp -13 - 10 exp -16 solar mass) dark-matter objects. The time delay induced by such a lens would be about 10 exp -17 - 10 exp -20 s, approximately equal to the period of a gamma ray. Interference between the two images would induce a characteristic interference pattern as a function of detected frequency. The pattern would be stable on time scales of 1 s, but might slowly drift on time scales of 10 s in response to the relative motion of the lens and source. The signal from a femtolens would be quite distinct and would be well within the sensitivity of present detectors.

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