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MILLISEARCH: A Search for Millilensing in BATSE GRB Data
Robert J. Nemiroff
Dept. of Physics, Michigan Technological University
Abstract:
The millisearch.for code was used to generate
a new search for the gravitational lens effects of a significant cosmological d
ensity of supermassive compact objects (SCOs) on gamma-ray bursts. No
signal attributable to millilensing was found.
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, $\Om
ega_{SCO} < 0.1$ is favored for $10^5 < M_{SCO}/M_{\odot} < 10^9$, while in som
e 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 neither came out of the primordial universe, nor condensed at rec
ombination.
Subject headings: gamma rays: bursts, gravitational lensing,
methods: data analysis
Latest Version: 3.2 (1999 September 22)
Archived: 2000 August 14
Paper:
Nemiroff, R.J., Marani, G.F., Norris, J.P., & Bonnell, J.T., PRL, 86, 580.
Language: Fortran
Source Code (ASCL archived):
millisearch.for