Astronomy and Astrophysics – Astrophysics
Scientific paper
1994-03-22
Astronomy and Astrophysics
Astrophysics
in press: ApJ, Plain TeX, 14 pages, 17 figures (available by FAX)
Scientific paper
10.1086/174587
We have searched for gravitational-lens induced echoes between gamma-ray bursts (GRBs) in NASA's orbiting {\it Compton} Gamma Ray Observatory's Burst and Transient Source Experiment (BATSE) data. The search was conducted in two phases. In the first phase we compared all GRBs in a brightness complete sample of the first 260 GRBs with recorded angular positions having at least 5 \% chance of being coincident from their combined positional error. In the second phase, we compared all GRB light curves of the first 611 GRBs with recorded angular positions having at least 55 \% chance of being coincident from their combined positional error. No unambiguous gravitational lens candidate pairs were found in either phase, although a ``library of close calls" was accumulated for future reference. This result neither excludes nor significantly constrains a cosmological origin for GRBs.
Fishman Gerald J.
Horack John M.
Kouveliotou Chryssa
Meegan Charles A.
Nemiroff Robert J.
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