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The First Limits on the Ultra-high Energy Neutrino Fluence from Gamma-ray Bursts

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arxiv 1102.3206 v1 pith:CUWELJ3O submitted 2011-02-15 astro-ph.HE

The First Limits on the Ultra-high Energy Neutrino Fluence from Gamma-ray Bursts

A. G. Vieregg , K. Palladino , P. Allison , B. M. Baughman , J. J. Beatty , K. Belov , D. Z. Besson , S. Bevan
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W. R. Binns C. Chen P. Chen J. M. Clem A. Connolly M. Detrixhe D. De Marco P. F. Dowkontt M. DuVernois P. W. Gorham E. W. Grashorn B. Hill S. Hoover M. Huang M. H. Israel A. Javaid K. M. Liewer S. Matsuno B. C. Mercurio C. Miki M. Mottram J. Nam R. J. Nichol A. Romero-Wolf L. Ruckman D. Saltzberg D. Seckel G. S. Varner Y. Wang
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We set the first limits on the ultra-high energy (UHE) neutrino fluence at energies greater than 10^9 GeV from gamma-ray bursts (GRBs) based on data from the second flight of the ANtarctic Impulsive Transient Antenna (ANITA). During the 31 day flight of ANITA-II, 26 GRBs were recorded by Swift or Fermi. Of these, we analyzed the 12 GRBs which occurred during quiet periods when the payload was away from anthropogenic activity. In a blind analysis, we observe 0 events on a total background of 0.0044 events in the combined prompt window for all 12 low-background bursts. We also observe 0 events from the remaining 14 bursts. We place a 90% confidence level limit on the E^-4 prompt neutrino fluence of 2.5x10^17 GeV^3/cm^2 between 10^8 and 10^12 GeV from GRB090107A. This is the first reported limit on the UHE neutrino fluence from GRBs above 10^9 GeV, and the strongest limit above 10^8 GeV.

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