TITLE: GCN CIRCULAR NUMBER: 24068 SUBJECT: Search for neutrino counterparts to GW candidate S190408an with IceCube DATE: 19/04/08 21:14:21 GMT FROM: Erik Blaufuss at U. Maryland/IceCube The IceCube Collaboration (http://icecube.wisc.edu/) reports: IceCube has performed a search for track-like muon neutrino events consistent with the sky localization of GW candidate S190408an (https://gcn.gsfc.nasa.gov/notices_l/S190408an.lvc) in a time range of 1000 seconds centered on the alert event time (2019-04-08 18:09:42.288 UTC to 2019-04-08 18:26:22.288 UTC) during which IceCube was collecting good quality data. No track-like events are found in spatial coincidence with the 90% spatial containment of S190408an calculated from the map circulated in the initial notice. IceCube's sensitivity to point sources within the location spanned by the 90% spatial containment of S190408an ranges from 0.029 to 0.606 GeV cm^-2 in a 1000 second time window. The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu