Neutrinos below 100 TeV from the southern sky employing refined veto techniques to IceCube data

Abstract

Many Galactic sources of gamma rays, such as supernova remnants, are expected to produce neutrinos with a typical energy cutoff well below 100 TeV. For the IceCube Neutrino Observatory located at the South Pole, the southern sky, containing the inner part of the Galactic plane and the Galactic Center, is a particularly challenging region at these energies, because of the large background of atmospheric muons. In this paper, we present recent advancements in data selection strategies for track-like muon neutrino events with energies below 100 TeV from the southern sky. The strategies utilize the outer detector regions as veto and features of the signal pattern to reduce the background of atmospheric muons to a level which, for the first time, allows IceCube searching for point-like sources of neutrinos in the southern sky at energies between 100 GeV and several TeV in the muon neutrino charged current channel. No significant clustering of neutrinos above background expectation was observed in four years of data recorded with the completed IceCube detector. Upper limits on the neutrino flux for a number of spectral hypotheses are reported for a list of astrophysical objects in the southern hemisphere.

arXiv comment19 pages, 17 figures, 2 tables

References in corpus (34)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• The IceCube Neutrino Observatory: Instrumentation and Online Systems
• Neutrino Interactions at Ultrahigh Energies
• Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data
• Acceleration of petaelectronvolt protons in the Galactic Centre
• The IceCube Data Acquisition System: Signal Capture, Digitization, and Timestamping
• All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data
• The Design and Performance of IceCube DeepCore
• Calibration and Characterization of the IceCube Photomultiplier Tube
• Energy Reconstruction Methods in the IceCube Neutrino Telescope
• IceTop: The surface component of IceCube
• Muon Track Reconstruction and Data Selection Techniques in AMANDA
• Methods for point source analysis in high energy neutrino telescopes
• The high energy neutrino cross-section in the Standard Model and its uncertainty
• Measurement of South Pole ice transparency with the IceCube LED calibration system
• Searches for Extended and Point-like Neutrino Sources with Four Years of IceCube Data
• Search for annihilating dark matter in the Sun with 3 years of IceCube data
• IceCube: An Instrument for Neutrino Astronomy
• Guaranteed and Prospective Galactic TeV Neutrino Sources
• First all-flavour Neutrino Point-like Source Search with the ANTARES Neutrino Telescope
• Search for Dark Matter Annihilation in the Galactic Center with IceCube-79
• All-flavour Search for Neutrinos from Dark Matter Annihilations in the Milky Way with IceCube/DeepCore
• Estimating the angular resolution of tracks in neutrino telescopes based on a likelihood analysis
• Prospects for identifying the sources of the Galactic cosmic rays with IceCube
• Neutrinos from galactic sources of cosmic rays with known gamma-ray spectra
• Penalized Splines for Smooth Representation of High-dimensional Monte Carlo Datasets
• Improvement in Fast Particle Track Reconstruction with Robust Statistics
• Search for astrophysical sources of neutrinos using cascade events in IceCube
• Lowering IceCube's Energy Threshold for Point Source Searches in the Southern Sky

Cited by in corpus (1)

• Directional association of TeV to PeV astrophysical neutrinos with radio blazars