Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 4, Pages 580-583Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.580
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A new search for the gravitational lens effects of a significant cosmological density of supermassive compact objects (SCOs) on gamma-ray bursts (GRBs) has yielded a null result. We inspected the timing data of 774 BATSE-triggered GRBs for evidence of millilensing: repeated peaks similar in light-curve shape and spectra. Our null detection leads us to conclude that, in all candidate universes simulated, Omega (SCO) < 0.1 is favored for SCO masses in the range 10(5) < M-SCO/M. < 10(9), while in some universes and mass ranges the density limits are as much as 10 times lower. Therefore, a cosmologically significant population of SCOs near globular cluster mass did not come out of the primordial universe or condense at recombination.
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