Search for ultrahigh-energy cosmic gamma-ray bursts on the Baksan underground scintillation telescope |
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| Authors: | D V Smirnov V B Petkov S N Karpov |
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| Institution: | (1) Institute for Nuclear Research, Russian Academy of Sciences, ul. 60-letiya Oktyabrya 7a, Moscow, 117312, Russia |
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| Abstract: | Based on data from the Baksan underground scintillation telescope (BUST) for the period 2001–2004, we searched for cosmic
gamma-ray bursts (GRBs) at primary photon energies of 0.5 TeV or higher. We obtained constraints on the rate of bursts with
durations of 1–10 s for fluences within the range 4.6 × 10−3-1.8 × 10−2 erg cm−2 in the declination band 30° ≤ δ ≤ 80°. We searched for ultrahigh-energy gamma rays from GRBs detected on spacecraft during and within ±2 h of the burst.
No statistically significant excesses above the background of random coincidences were found. The derived constraints on the
ultrahigh-energy gamma-ray fluence during GRBs lie within the range 4.6 × 10−3-3.7 × 10−2 erg cm−2. |
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