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Testing the Pointing of IceCube Using the Moon Shadow in Cosmic-Ray-Induced Muons

  • The IceCube Collaboration
  • RWTH Aachen University
  • Friedrich-Alexander University Erlangen-Nürnberg
  • Loyola University Chicago
  • German Electron Synchrotron
  • University of Canterbury
  • Université libre de Bruxelles
  • University of Copenhagen
  • The Oskar Klein Centre
  • University of Geneva
  • Karlsruhe Institute of Technology
  • University of Delaware
  • Harvard University
  • Marquette University
  • Pennsylvania State University
  • University of Wisconsin-Madison
  • Massachusetts Institute of Technology
  • South Dakota School of Mines & Technology
  • University of California at Irvine
  • University of California at Berkeley
  • Ohio State University
  • University of Wuppertal
  • Ruhr University Bochum
  • Technical University of Munich
  • University of Rochester
  • University of Maryland, College Park
  • University of Padua
  • University of Kansas
  • Moscow Engineering Physics Institute
  • Lawrence Berkeley National Laboratory
  • Johannes Gutenberg University Mainz
  • Uppsala University

Research output: Contribution to journalConference articlepeer-review

Abstract

The IceCube Neutrino Observatory is a cubic-kilometer-scaled detector located at the Geographic South Pole. The calibration of the directional reconstruction of neutrino-induced muons and the pointing accuracy of the detector have to be verified. For these purposes, the moon is used as a standard candle to not rely exclusively on simulated data: Cosmic rays get absorbed by the moon, which leads to a deficit of cosmic-ray-induced muons from the lunar direction that is measured with high statistics. The moon shadow analysis uses an unbinned maximum-likelihood method, which has been methodically improved, and uses a larger detector compared to previous analyses. This allows to observe the shadow with a large significance per month. In the first part, it is found that incorporating a moon disk model, a coordinate-dependent uncertainty scaling and an improved background estimation increase the significance compared to a previous more simplistic analysis. In the second part, the performance of two new directional muon reconstruction algorithms is verified.

Original languageEnglish
Article number1087
JournalProceedings of Science
Volume395
StatePublished - Mar 18 2022
Event37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany
Duration: Jul 12 2021Jul 23 2021

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