{
  "bibcode": "2017GCN.22114....1D",
  "body": "Simone Dichiara (UNAM-IA), Israel Martinez (University of Maryland),\nJ.A. Garc��a-Gonz��lez (UNAM-IF), Ignacio Taboada (Georgia Tech)\nreport on behalf of the HAWC collaboration\n(https://www.hawc-observatory.org/collaboration/):\n\nOn 2017/11/06 18:39:39.21 UT IceCube detected a track-like,\nvery-high-energy event with a high probability of being of\nastrophysical origin, at RA=340.00d and Dec=+7.40d J2000\nas reported in GCN circular 22105.\n\nThe event was not in the field of view of HAWC, so we\nanalyze the data following two different approaches:\n\n*We searched for a steady source in archival data from November\n2014 to September 2017.  Assuming a spectral index of -2.5 we\nsearched in the reported 90% PSF containment circle.The maximum\nsignificance is 1.57 sigma at RA=339.48deg and Dec=7.78deg. We\nestimate the number of trials to be ~20. We set an upper limit\n95% CL on gamma rays for this period of:\n\nE^2 dN/dE = 4.60e-13 (E/TeV)^-0.5 TeV cm^-2 s^-1.\n\n*We also performed a study using data corresponding to the two\nnearest transits of IceCube-171106 in HAWC���s field of view (MJD\n58062.96-58063.22 and 58063.95-58064.21). Using the same spectral\nindex and search window, the maximum significance is 1.2 sigma at\nRA=340.35deg and Dec=7.12deg.\nWe set an upper limit 95% CL on gamma rays for this period of:\n\nE^2 dN/dE = 9.38e-12 (E/TeV)^-0.5 TeV cm^-2 s^-1.\n\nHAWC is a very-high-energy gamma-ray observatory located in\nCentral Mexico at latitude 19 deg North. It operates 24 hours\nper day with over 95% duty cycle. HAWC has an instantaneous\nfield of view of 2 sr and surveys 2/3 of the sky every day.\nIt is sensitive to gamma rays from 300 GeV to 100 TeV.",
  "circularId": 22114,
  "createdOn": 1510267353000,
  "email": "sdichiara@astro.unam.mx",
  "subject": "HAWC follow-up of IceCube-171106A",
  "submitter": "Simone Dichiara at UNAM  <sdichiara@astro.unam.mx>",
  "eventId": "IceCube-171106A"
}