12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room D(109/110)

[NU009] Four Swift searches for transient sources of high-energy neutrinos


  • Azadeh KEIVANI

Primary authors



We present results of the first four Swift satellite follow-up campaigns seeking to identify transient or variable X-ray or UV/optical sources that might be associated with individual high-energy cosmic neutrinos detected by the IceCube Neutrino Observatory. Real-time public alerts providing coordinates and arrival times of likely-cosmic neutrinos have been provided by IceCube, via the Astrophysical Multimessenger Observatory Network, since April 2016. Subsequent Swift X-ray observations of four likely-cosmic neutrinos (events 160731A, 161103A, 170312A, and 170321A) reveal multiple X-ray sources in the targeted ~80%-containment regions, most of which have been previously identified, and none of which are considered likely sources of high-energy neutrinos. Observations exclude association with the brightest 30% to 65% of Swift-type gamma-ray burst X-ray afterglows over the targeted regions. Contemporaneous Swift UV/optical observations, providing reduced coverage of the event localizations, also reveal no candidate transient or variable UV/optical counterparts. We will discuss the results of these campaigns, the implications for source scenarios, and our plans for further follow-up of likely-cosmic high-energy neutrinos from IceCube and other facilities, as well as neutrino + gamma-ray multimessenger alerts from AMON.