Development of a neutrino filter in the FINK broker

Stage numéro : M1-2021-KM-01
Laboratoire :Centre de Physique des Particules de Marseille Case 902
 163 avenue de Luminy - 13288 Marseille Cedex 9
Directeur :Cristinel Diaconu - 04.91.82.72.01 - diaconu@cppm.in2p3.fr
Correspondant :William Gillard - 04.91.82.72.67 - gillard@cppm.in2p3.fr
Groupe d'accueil :KM3NeT
Chef de groupe :Vincent Bertin - 04.91.82.72.61 - bertin@cppm.in2p3.fr
Responsable de stage :Damien Dornic - 0491827682 - dornic@cppm.in2p3.fr

Thématique : Astroparticules

Time-domain astronomy has received a considerable boost in recent years due to its ability to study extreme physics, to track cataclysmic phenomena like the birth of stellar mass black holes or the mergers of neutron stars, to probe distant

regions of the Universe, and to identify candidate sources for multi-messenger astrophysics. These explosive events can release enormous amounts of energy both in electromagnetic radiation and in non-electromagnetic forms such as neutrinos

and gravitational waves. They lie at the frontier of our understanding of the laws of physics under the most extreme conditions. Multi-messenger astronomy – the observation of astrophysical objects and processes using combinations of different messengers such as electromagnetic radiation, neutrinos, cosmic rays and gravitational waves – has emerged as a major new field in astronomy during the last years.

In CPPM, we are mainly working on the development of multi-messenger analyses with high-energy neutrinos detected with ANTARES and KM3NeT neutrino telescopes. In this context, we are developing a real-time analysis framework that is able to send neutrino alerts and to receive and process a cross-match analysis with high-energy neutrinos. In the next years, the LSST telescope in Chile will be one of the major discover of optical transients. Around a million triggers are expected each night. To account for these large numbers, LSST is developing some brokers to filter the alerts. In France, some colleagues are implementing the FINK broker (https://arxiv.org/abs/2009.10185). Some actual data are available with the ZTF telescope in US.

During this intern ship, the student will implement a filter chain in the broker to identify the most interesting candidates for the neutrino searches. It will filter on the nature of the transient, the number of detections, the light-curve and some cross-matches with astrophysical catalogues.

The analyses will be performed using C++ or python.