Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 67: Neutrino astronomy III
T 67.1: Talk
Wednesday, March 17, 2021, 16:00–16:15, Tq
A new and improved IceCube point-source analysis — Chiara Bellenghi1, Theo Glauch1, Christian Haack1, •Tomas Kontrimas1, Hans Niederhausen1, Martin Wolf1, and Rene Reimann2 for the IceCube collaboration — 1Technische Universität München — 2RWTH Aachen
The IceCube Neutrino Observatory is a one cubic kilometer neutrino telescope deployed deep in the Antarctic ice at the South Pole. The general aim of IceCube is to investigate high energy astrophysical phenomena by studying the corresponding high energy neutrino signal. One of the main goals is to identify the sources of the diffuse astrophysical neutrino flux, that IceCube discovered in 2012. We present a new method to search for neutrino point-sources that improves the accuracy of the likelihood function description in the low energy regime, where the usual Gaussian approximation of IceCube's point spread function breaks down. The new method includes multidimensional kernel density estimation (KDE) based probability density functions, angular error estimates using a boosted decision tree (BDT) classifier, and a new deep neural network (DNN) energy estimator. In this talk we will present the final performance estimates of the improved analysis.