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T: Fachverband Teilchenphysik

T 59: Neutrino astronomy II

T 59.5: Vortrag

Mittwoch, 1. April 2020, 17:30–17:45, L-2.004

A new and improved IceCube point-source analysis — •Chiara Bellenghi, Hans Niederhausen, Martin Wolf, Theo Glauch, and Tomas Kontrimas — James-Franck-Straße 1, 85748 Garching bei München

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 in the low energy regime, where the usual gaussian approximation of IceCube's point spread function breaks down. The new method includes multidimensional KDE based probability density functions, angular error estimates using a BDT as well as a new DNN energy estimator. We will present the performance of the updated analysis including sensitivity and discovery potential for point-like sources in the sky.