{
  "bibcode": "2016GCN.20250....1M",
  "body": "Israel Martinez (University of Maryland) reports on behalf of the HAWC\ncollaboration (http://www.hawc-observatory.org/collaboration/):\n\nOn 2016/12/10 20:07:16 UT IceCube detected a track-like,\nvery-high-energy event with a high probability of being of\nastrophysical origin, at RA=46.58d and Dec=14.98d J2000.\nIt was reported in GCN circular 20247.\n\nTwo analyses were performed:\n\n* Search for a steady source.\nThis analysis was performed on archival data from November 2014 to\nJune 2016. Assuming a spectral index of -2.3 we searched in a\nrectangular window corresponding to IceCube's 90% PSF containment for\nthe event (1.72deg^2). The maximum significance is 2.83 sigma at\nRA=47.46d and Dec=14.59d. We estimate the number of trials to be ~70.\nWe set an upper limit 95% CL on gamma rays for this period of:\nE^2 dN/dE = 3.23e-13 (E/TeV)^-0.3 TeV cm^-2 s^-1.\n\n* Search for a transient source.\nThe event location was not in HAWC's FOV at the time of detection, so\nthis analysis was performed using data corresponding to the two nearest\n6hrs transits (MJD 57732.05-57732.30 and 57733.05-57733.30). Using the\nsame spectral index and search window, the maximum significance is\n1.71 sigma at RA=46.57d and Dec=15.18d. We set an upper limit 95% CL\non gamma rays for this period of:\nE^2 dN/dE = 1.54e-11 (E/TeV)^-0.3 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 day and night with over\n95% duty cycle, HAWC has an instantaneous field of view of 2 sr and\nsurveys 2/3 of the sky every day. It is sensitive to gamma rays from\n300 GeV to 100 TeV.",
  "circularId": 20250,
  "createdOn": 1481652922000,
  "email": "imc@umd.edu",
  "subject": "HAWC follow-up on IceCube-161210",
  "submitter": "Israel Martinez at HAWC  <imc@umd.edu>"
}