{
  "bibcode": "2007GCN..7004....1S",
  "body": "Pablo Saz Parkinson (UC Santa Cruz) on behalf of the Milagro\ncollaboration reports:\n\nWe have searched Milagro data for emission at GeV/TeV energies from\nGRB 071025 detected by Swift (GCN Circ 6986, C. Pagani et al.),\nduring the main period of emission lasting 422s (GCN Circ 6996, S. D.\nBarthelmy et al.). No evidence for prompt GeV/TeV emission was found.\nTeV photons are attenuated by pair production with infrared photons in\nintergalactic space. We calculate uppers limits using the extragalactic\ninfrared background light (EBL) absorption model of\nPrimack et al. 2005 (AIP Conf. Proc. 745, p. 23).\n\nA preliminary analysis, assuming a differential photon spectral\nindex of -2.4, gives upper limits on E^2dN/dE at 99% confidence of:\n\nE^2 dN/dE at 200 GeV < 1.4 * 10^(-6) erg cm^(-2) (Assuming z=0)\n\nand\n\nE^2 dN/dE at 200 GeV < 2.3 * 10^(-5) erg cm^(-2) (Assuming z=0.5)\nE^2 dN/dE at 200 GeV < 2.0 * 10^(-3) erg cm^(-2) (Assuming z=2.0)\n\nThese upper limits are preliminary and will be refined with further\nanalysis.",
  "circularId": 7004,
  "createdOn": 1193353715000,
  "email": "pablo@scipp.ucsc.edu",
  "subject": "GRB 071025 Milagro GeV/TeV Observations",
  "submitter": "Pablo Saz Parkinson at UCSC/Milagro  <pablo@scipp.ucsc.edu>",
  "eventId": "GRB 071025"
}