Astrophysical Neutrino Sources with the IceCube Neutrino Observatory

Since detector completion in 2011, the IceCube Neutrino Observatory has been searching for astrophysical neutrinos from high energy sources in the universe. IceCube has since observed an unresolved flux of astrophysical neutrinos at high energies. In 2017, IceCube identified the first likely astrophysical source of high energy neutrinos with the observation of a 290 TeV neutrino and a lower-energy time clustering of neutrinos from the direction of the blazar TXS 0506+056. A recently published analysis has now identified a second AGN, NGC 1068, as another potential source of high energy neutrinos with a significance of 4.2 sigma. In this talk, I will discuss the history of IceCube's astrophysical source searches and provide an overview of the new result. I will also discuss the prospects for a future planned detector expansion, IceCube-Gen2, which is expected to improve sensitivity to point sources by up to a factor of five compared to the existing IceCube detector.