Low-energy (100 GeV - few TeV) neutrino point source searches in the southern sky with IceCube
by
Rickard Ström(Uppsala)
→
Europe/Stockholm
Å64119 (Ångström)
Å64119
Ångström
Description
Abstract:
IceCube searches for neutrino point sources in the southern sky have traditionally been restricted to energies well above 100 TeV, where the background of down-going atmospheric muons becomes sufficiently low to be tolerated in searches. Recent developments of a data stream dedicated to the study of low-energy neutrinos from the Southern Hemisphere enable searches to be extended far below this threshold. This data stream utilizes powerful veto techniques to reduce the atmospheric muon background, allowing IceCube for the first time to perform a search for point-like sources of neutrinos in the southern sky at energies between 100 GeV and a few TeV. An unbinned maximum likelihood method is used to search for clustering of neutrino-like events. We perform a search in the full Southern hemisphere and a dedicated search using a catalog of 96 pre-defined known gamma-ray emitting sources seen in ground-based telescopes. We will present the event selection along with the results obtained using one year of data from the full detector.