Neutrino-Induced Cascades From GRBs With AMANDA-II

Abstract

Using AMANDA-II we have performed a search for neutrino-induced cascades in coincidence with 73 bursts reported by BATSE in 2000. Background is greatly suppressed by the BATSE temporal constraint. No evidence of neutrinos was found. We set a limit on a WB-like spectrum, $A_{90}^{allflavors}$ = 9.5$\times 10^{-7}$ GeV cm${}^{-2}$ s${}^{-1}$ sr${}^{-1}$. The determination of systematic uncertainties is in progress, and the limit will be somewhat weakened once these uncertainties are taken into account. We are also conducting a rolling time-window search for neutrino-induced cascades consistent with a GRB signal in 2001. The data set is searched for a statistically significant cluster of signal-like events within a 1 s or 100 s time window. The non-triggered search has the potential to discover phenomena, including gamma-ray dark choked bursts, which did not trigger gamma-ray detectors.

4 pages, 2 figures; to appear in the Proceedings of the 29th ICRC, Pune, India