GCN Circular 8883
Alexander Kappes for the IceCube collaboration (http://www.icecube.wisc.edu ) reports: IceCube is a 1 km^3 neutrino telescope located at the geographic South Pole sensitive to neutrinos above ~100 GeV. We used the data from IceCube in its 9-string configuration to search for high-energy muon neutrinos from the position of GRB 080319B (Racusin et al., GCN 7427) using an unbinned likelihood method. The search was performed in a narrow time window of 66 s (T_0 - 3.8s to T_0 + 62.2s) corresponding to the observed prompt gamma-ray emission, and in a wider window of about 5 minutes (T_0 - 173s to T_0 + 130 s). We do not find any indications for a deviation from the background- only hypothesis in either of the two time windows. Therefore, we use the null result from the prompt window to place an upper limit (90% C.L.) on the prompt muon neutrino flux from GRB 080319B of 9.0e-3 erg cm^-2 in the energy range between 145 TeV and 2.1 PeV. A corresponding paper has been submitted to ApJ. The preprint version can be found at arXiv:0902.0131.