{
  "bibcode": "2019GCN.23613....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\n\nIceCube has performed a search for additional track-like muon neutrino events arriving from the direction\n\nof IceCube-190104A (https://gcn.gsfc.nasa.gov/gcn3/23605.gcn3) in a time range of 2 days centered on the alert\n\nevent time (2019-01-03 08:34:38 UTC to 2019-01-05 08:34:38 UTC) during which IceCube was collecting good quality data. Excluding\n\nthe event that prompted the alert, 3 additional track-like events are found in spatial coincidence with the\n\n90% PSF containment of IceCube-190104A. We find that these 3 additional events are well described by atmospheric\n\nbackground expectations, with a p-value of 1.0. Accordingly, these data would represent a time-integrated\n\nmuon-neutrino flux upper limit assuming an E^-2 spectrum (E^2 dN/dE) at the 90% CL of 3.98 x 10^-4 TeV cm^-2\n\nfor this observation period.\n\n\nA subsequent search was performed to include the previous month of data (2018-12-04 08:34:38 UTC to 2019-01-05 08:34:38 UTC).\n\nIn this case, we also report a p-value of 1.0, consistent with no significant excess of track events, and a corresponding\n\ntime-integrated muon-neutrino flux upper limit assuming an E^-2 spectrum (E^2 dN/dE) at the 90% CL of 1.29 x 10^-3 TeV cm^-2.\n\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica.\n\nThe IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu.",
  "circularId": 23613,
  "createdOn": 1546722112000,
  "email": "pizzuto@wisc.edu",
  "subject": "Search for Counterparts to IceCube-190104A with IceCube",
  "submitter": "Alex Pizzuto at ICECUBE/U of Wisconsin  <pizzuto@wisc.edu>",
  "eventId": "IceCube-190104A"
}