{
  "bibcode": "2005GCN..4249....1S",
  "body": "Pablo Saz Parkinson (UC Santa Cruz) on behalf of the Milagro Collaboration\nreports:\n\nWe have searched Milagro data for emission at GeV/TeV energies from the\nIPN short hard burst GRB 051103 (GCN Circ 4197, S. Golenetskii et al.),\nduring the 0.17 s burst duration observed by the Konus-Wind experiment. No\nevidence for prompt GeV/TeV emission was found. This burst occurred at a\nrelatively large zenith angle of 50 degrees, where the sensitivity of\nMilagro is degraded. A preliminary analysis, assuming a differential\nphoton spectral index of -2.4, gives an upper limit on the fluence at 99%\nconfidence of:\n\nFluence < 4.2 * 10^(-6) erg cm^(-2) (0.25 - 25 TeV)\n\nIf the burst originated from a source in the nearby galaxy M81, at\na distance of less than 4 Mpc (GCN Circ 4197, S. Golenetskii et al.)\nthe attenuation due to the extra-galactic background light (EBL) would\nbe negligible. This upper limit is preliminary and will be refined with\nfurther analysis.",
  "circularId": 4249,
  "createdOn": 1131691536000,
  "email": "pablo@scipp.ucsc.edu",
  "subject": "GRB 051103 Milagro GeV/TeV Observations",
  "submitter": "Pablo Saz Parkinson at UCSC/Milagro  <pablo@scipp.ucsc.edu>",
  "eventId": "GRB 051103"
}