Search for Astrophysical Neutrino Transients with IceCube DeepCore

TL;DR

This paper presents an all-sky, untriggered, time-dependent search for short-lived astrophysical neutrino transients using IceCube DeepCore data, extending previous half-sky searches to cover the entire sky and lower energy range.

Contribution

It introduces a new event selection and dataset enabling all-sky, untriggered searches for short-duration neutrino transients with DeepCore.

Findings

DeepCore can reliably detect short-lived astrophysical neutrino sources.

The all-sky sensitivity range is from 10 GeV to 300 GeV.

The method extends previous half-sky searches to full-sky coverage.

Abstract

DeepCore, as a densely instrumented sub-detector of IceCube, extends IceCube's energy reach down to about 10 GeV, enabling the search for astrophysical transient sources, e.g., choked gamma-ray bursts. While many other past and on-going studies focus on triggered time-dependent analyses, we aim to utilize a newly developed event selection and dataset for an untriggered all-sky time-dependent search for transients. In this work, all-flavor neutrinos are used, where neutrino types are determined based on the topology of the events. We extend the previous DeepCore transient half-sky search to an all-sky search and focus only on short timescale sources (with a duration of $10^2 \sim 10^5$ seconds). All-sky sensitivities to transients in an energy range from 10 GeV to 300 GeV will be presented in this poster. We show that DeepCore can be reliably used for all-sky searches for short-lived astrophysical sources.