M. Liubarska

Detailed investigations of PMTs in optical sensors for neutrino telescopes such as IceCube Upgrade

R. Abbasi, W. Achtermann, M. Ackermann, J. Adams et autres

Photomultiplier tubes (PMTs) are a central component of neutrino telescopes such as IceCube and KM3NeT, and an accurate understanding and measurement of their properties is indispensable for improvements of these experiments. In this contribution we focus on a detailed investigation of the …

Exploring the Galactic neutrino flux origins using IceCube datasets

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

Astrophysical neutrinos detected by the IceCube observatory can be of Galactic or extragalactic origin. The collective contribution of all the detected neutrinos allows us to measure the total diffuse neutrino Galactic and extragalactic signal. In this work, we describe a simulation package …

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Galactic and Extragalactic Analysis of the Astrophysical Muon Neutrino Flux with 12.3 years of IceCube Track Data

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

The Ice Cube Neutrino Observatory has been measuring an isotropic astrophysical neutrino flux in multiple detection channels for almost a decade. Galactic diffuse emission, which arises from the interactions between cosmic rays and the interstellar medium, is an expected signal in IceCube. …

Enhanced Starting Track Real-time Stream for IceCube

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

IceCube real-time alerts allow for rapid follow-up observations of likely astrophysical neutrino events, enabling searches for multi-messenger counterparts. The Enhanced Starting Track Real-time Stream (ESTReS) is a real-time extension of the Enhanced Starting Track Event Selection (ESTES), a high astrophysical purity muon-neutrino …

Operations plans and sensitivities of the IceCube Upgrade Camera System

C. Rott, R. Abbasi, M. Ackermann, J. Adams et autres

The IceCube Upgrade consists of seven new strings to be deployed in the central region of the existing IceCube detector. The goals of the IceCube Upgrade are two-fold: to enhance sensitivity to neutrinos in the GeV range, and to improve the calibration …

From PeV to TeV: Astrophysical Neutrinos with Contained Vertices in 10 years of IceCube Data

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

The IceCube Neutrino Observatory is a cubic-kilometer Cherenkov detector at the South Pole, designed to study neutrinos of astrophysical origin. We present an analysis of the Medium Energy Starting Events (MESE) sample, a veto-based event selection that selects neutrinos and efficiently rejects …

Summary of IceCube Tau Neutrino Searches and Flavor Composition Measurements of the Diffuse Astrophysical Neutrino Flux

D. F. Cowen, R. Abbasi, M. Ackermann, J. Adams et autres

We present a summary of the flavor composition measurements for the diffuse astrophysical neutrino flux using data from the IceCube Neutrino Observatory at the South Pole. IceCube has identified candidate astrophysical tau neutrinos through two different approaches. One approach used a dedicated …

2D Convolutional Neural Network for Event Reconstruction in IceCube DeepCore

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

IceCube DeepCore is an extension of the IceCube Neutrino Observatory designed to measure GeV scale atmospheric neutrino interactions for the purpose of neutrino oscillation studies. Distinguishing muon neutrinos from other flavors and reconstructing inelasticity are especially difficult tasks at GeV scale energies …

A time variability test for neutrino sources identified by IceCube

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

IceCube has reported evidence for neutrino emission from the Seyfert-II galaxy NGC 1068 and the blazar TXS 0506+056. The former was identified in a time-integrated search, and the latter using time-dependent and multi-messenger methods. A natural question is: are sources identified in …

All-Energy Search for Solar Atmospheric Neutrinos with IceCube

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

The interaction of cosmic rays with the solar atmosphere generates a secondary flux of mesons that decay into photons and neutrinos – the so-called solar atmospheric flux. Although the gamma-ray component of this flux has been observed in Fermi-LAT and HAWC Observatory …

IceCube search for neutrinos from novae

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

Despite being one of the longest known classes of astrophysical transients, novae continue to present modern surprises. The Fermi-LAT discovered that many if not all novae are GeV gamma ray sources, even though theoretical models had not even considered them as a …

Probing neutrino emission at GeV energies from astrophysical transient events with the IceCube Neutrino Observatory

R. Abbasi, M. Ackermann, J. Adams, S. K. Agarwalla et autres

Astrophysical transient events like Gamma Ray Bursts (GRBs) have always been promising candidates for multi-messenger astronomy, with electromagnetic and gravitational wave signals having already been observed in GRBs such as GRB 170817A. The neutrino signatures of these bursts have been long-awaited as …