Speaker
Description
The correlation between gamma-ray and neutrino emissions due to hadronic processes in astrophysical sources is of special interest for multi-messenger astronomy as both channels of detection offer complementary information about the sources studied.
The ANTARES neutrino telescope was a 0.01 $km^{3}$ volume detector located at the bottom of the Mediterranean Sea. It operated from 2007 until early 2022, and over its span it accumulated valuable neutrino data; KM3NeT/ARCA is located 100 km offshore Portopalo di Capo Passero in Sicily at a depth of 3.5 km, and is an undersea neutrino telescope dedicated to high-energy neutrino studies (up to multi-PeV). It will have a volume of $1 km^{3}$ upon completion. Both detectors work on the cherenkov light detection principle and their combination provides more than 16 years of cosmic neutrino data with excellent angular resolution, thanks to the optical properties of the deep Mediterranean Sea. On the other hand, gamma ray telescopes such as Fermi-LAT offer continuous and precise information of the gamma ray emission of cosmic neutrino source candidates, such as blazars.
The analysis presented in this contribution uses the data from Fermi-LAT to characterize the gamma ray flare emission of variable blazars in order to search for cosmic neutrinos during these periods of emission in the combined data sets of ANTARES and KM3NeT/ARCA. This work extends previous analyses based solely on partial ANTARES data and represents a step forward in joint neutrino telescope analyses.
