Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.; Arcaro, C.; Baack, D.; Babić, A.; Banerjee, B.; Bangale, P.; Barres de Almeida, U.; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Berse, R. Ch.; Berti, A.; Bhattacharyya, W.; Biland, A.; Blanch, O.; Bonnoli, G.; Carosi, R.; Carosi, A.; Ceribella, G.; Chatterjee, A.; Colak, S. M.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; Cumani, P.; Vela, P. Da; Dazzi, F.; Angelis, A. De; Lotto, B. De; Delfino, M.; Delgado, J.; Pierro, F. Di; Domínguez, A.; Prester, D. Dominis; Dorner, D.; Doro, M.; Einecke, S.; Elsaesser, D.; Fallah Ramazani, V.; Fernández-Barral, A.; Fidalgo, D.; Fonseca, M. V.; Font, L.; Fruck, C.; Galindo, D.; García López, R. J.; Garczarczyk, M.; Gaug, M.; Giammaria, P.; Godinović, N.; Góra, D.; Guberman, D.; Hadasch, D.; Hahn, A.; Hassan, T.; Hayashida, M.; Herrera, J.; Hose, J.; Hrupec, D.; Ishio, K.; Konno, Y.; Kubo, H.; Kushida, J.; Kuveždić, D.; Lelas, D.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; Maggio, C.; Majumdar, P.; Makariev, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Masuda, S.; Mazin, D.; Mielke, K.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Moralejo, A.; Moreno, V.; Moretti, E.; Nagayoshi, T.; Neustroev, V.; Niedzwiecki, A.; Nievas Rosillo, M.; Nigro, C.; Nilsson, K.; Ninci, D.; Nishijima, K. et al.
Bibliographical reference
Astroparticle Physics, Volume 102, p. 77-88.
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11
2018
Journal
Citations
18
Refereed citations
13
Description
A search for tau neutrino induced showers with the MAGIC telescopes is
presented. The MAGIC telescopes located at an altitude of 2200 m a.s.l.
in the Canary Island of La Palma, can point towards the horizon or a few
degrees below across an azimuthal range of about 80°. This provides
a possibility to search for air showers induced by tau leptons arising
from interactions of tau neutrinos in the Earth crust or the surrounding
ocean. In this paper we show how such air showers can be discriminated
from the background of very inclined hadronic showers by using Monte
Carlo simulations. Taking into account the orography of the site, the
point source acceptance and the event rates expected have been
calculated for a sample of generic neutrino fluxes from photo-hadronic
interactions in AGNs. The analysis of about 30 h of data taken towards
the sea leads to a 90% C.L. point source limit for tau neutrinos in the
energy range from 1.0 × 1015 eV to 3.0 ×
1018 eV of about Eντ2 ×
ϕ(Eντ) < 2.0 ×10-4
GeV cm-2 s-1 for an assumed power-law neutrino
spectrum with spectral index γ=-2. However, with 300 h and in case
of an optimistic neutrino flare model, limits of the level down to
Eντ2 ×
ϕ(Eντ) < 8.4 ×10-6
GeV cm-2 s-1 can be expected.
Related projects
Particle Astrophysics
The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with
Ramón
García López