Prof Subir Sarkar

Abstract:

Papers on the properties of the atmospheric and astrophysical neutrino flux submitted to the 35th International Cosmic Ray Conference (ICRC 2017, Busan, South Korea) by the IceCube Collaboration

Contents:

1 - Search for Astrophysical Tau Neutrinos in Six Years of High-Energy Starting Events in IceCube

2 - Multi-flavour PeV neutrino search with IceCube

3 - High Energy Astrophysical Neutrino Flux Measurement Using Neutrinoinduced Cascades Observed in 4 Years of IceCube Data

4 - A Measurement of the Diffuse Astrophysical Muon Neutrino Flux Using Eight Years of IceCube Data

5 - Characterizing the Flux of Atmospheric Neutrinos with IceCube-DeepCore

6 - Measurement of High Energy Neutrino – Nucleon Cross Section and Astrophysical Neutrino Flux Anisotropy Study of Cascade Channel with IceCube

7 - Observation of Astrophysical Neutrinos in Six Years of IceCube Data

8 - All-flavor Multi-Channel Analysis of the Astrophysical Neutrino Spectrum with IceCube

9 - Differential limit on an EHE neutrino flux component in the presence of astrophysical background from nine years of IceCube data

10 - Improving Future High-Energy Tau Neutrino Searches in IceCube

11 - Search for Astrophysical Tau Neutrinos with the IceCube Waveforms

Abstract:

Papers on the searches for the sources of astrophysical neutrinos, submitted to the 35th International Cosmic Ray Conference (ICRC 2017, Busan, South Korea) by the IceCube Collaboration

Contents

1 - Searching for VHE gamma-ray emission associated with IceCube astrophysical neutrinos using FACT, H.E.S.S., MAGIC, and VERITAS

2 - Search for point-like sources in the astrophysical muon neutrino flux with IceCube

3 - Search for weak neutrino point sources using angular auto-correlation analyses in IceCube

4 - All-sky search for correlations in the arrival directions of astrophysical neutrino candidates and ultrahigh-energy cosmic rays

5 - Results of IceCube searches for neutrinos from blazars using seven years of through-going muon data

6 - IceCube Search for Neutrinos from 1ES 1959+650: Completing the Picture

7 - Using all-flavor and all-sky event selections by IceCube to search for neutrino emission from the Galactic plane

8 - Constraints on diffuse neutrino emission from the Galactic Plane with 7 years of IceCube data

9 - Search for extended sources of neutrino emission with 7 years of IceCube data

10 - Search for a cumulative neutrino signal from blazar flares using IceCube data

11 - Investigation of Obscured Flat Spectrum Radio AGN with the IceCube Neutrino Observatory

12 - Realtime neutrino alerts and follow-up in IceCube

13 - Search for High-Energy Neutrino Emission from Fast Radio Bursts

14 - IceCube as a Neutrino Follow-up Observatory for Astronomical Transients

Abstract:

We present an all-sky search for muon neutrinos produced during the prompt γ-ray emission of 1172 gamma-ray bursts (GRBs) with the IceCube Neutrino Observatory. The detection of these neutrinos would constitute evidence for ultra-high-energy cosmic-ray (UHECR) production in GRBs, as interactions between accelerated protons and the prompt γ-ray field would yield charged pions, which decay to neutrinos. A previously reported search for muon neutrino tracks from northern hemisphere GRBs has been extended to include three additional years of IceCube data. A search for such tracks from southern hemisphere GRBs in five years of IceCube data has been introduced to enhance our sensitivity to the highest energy neutrinos. No significant correlation between neutrino events and observed GRBs is seen in the new data. Combining this result with previous muon neutrino track searches and a search for cascade signature events from all neutrino flavors, we obtain new constraints for single-zone fireball models of GRB neutrino and UHECR production.

Abstract:

The Advanced LIGO observatories detected gravitational waves from two binary black hole mergers during their first observation run (O1). We present a high-energy neutrino follow-up search for the second gravitational wave event, GW151226, as well as for gravitational wave candidate LVT151012. We find 2 and 4 neutrino candidates detected by IceCube, and 1 and 0 detected by ANTARES, within $\pm500$ s around the respective gravitational wave signals, consistent with the expected background rate. None of these neutrino candidates are found to be directionally coincident with GW151226 or LVT151012. We use non-detection to constrain isotropic-equivalent high-energy neutrino emission from GW151226 adopting the GW event's 3D localization, to less than $2\times 10^{51}-2\times10^{54}$ erg.