# First all-flavour Neutrino Point-like Source Search with the ANTARES Neutrino Telescope

## TL;DR

This paper reports the first all-flavour neutrino point-source search with ANTARES, incorporating both charged and neutral current interactions using a novel shower reconstruction, but finds no significant excess over background.

## Contribution

It introduces a new reconstruction algorithm for shower-like events and performs the first all-flavour neutrino point-source search with ANTARES data.

## Key findings

- No significant neutrino source detection was made.
- The most signal-like cluster has a 1.9 sigma significance.
- Upper limits on neutrino fluxes from candidate sources were established.

## Abstract

A search for cosmic neutrino sources using the data collected with the ANTARES neutrino telescope between early 2007 and the end of 2015 is performed. For the first time, all neutrino interactions --charged and neutral current interactions of all flavours-- are considered in a search for point-like sources with the ANTARES detector. In previous analyses, only muon neutrino charged current interactions were used. This is achieved by using a novel reconstruction algorithm for shower-like events in addition to the standard muon track reconstruction. The shower channel contributes about 23\% of all signal events for an $E^{-2}$ energy spectrum. No significant excess over background is found. The most signal-like cluster of events is located at $(\alpha,\delta) = (343.8^\circ, 23.5^\circ)$ with a significance of $1.9\sigma$. The neutrino flux sensitivity of the search is about $E^2 d\varPhi/dE = 6\cdot10^{-9} GeV cm^{-2} s^{-1}$ for declinations from $-90^\circ$ up to $-42^\circ$, and below $10^{-8} GeV cm^{-2} s^{-1}$ for declinations up to $5^{\circ}$. The directions of 106 source candidates and of 13 muon track events from the IceCube HESE sample are investigated for a possible neutrino signal and upper limits on the signal flux are determined.