F. Oikonomou

The Giant Radio Array for Neutrino Detection

The Giant Radio Array for Neutrino Detection (GRAND) is a planned array of ~ 2·105 radio antennas deployed over ~ 200 000 km2 in a mountainous site. It aims primarly at detecting high-energy neutrinos via the observation of extensive air showers induced by the decay in the atmosphere of taus produced by the interaction of cosmic neutrinos under the Earth surface. GRAND aims at reaching a neutrino sensitivity of 5 · 10−11 E −2 GeV−1 cm−2 s−1 sr−1 above 3 · 1016 eV. This ensures the detection of cosmogenic neutrinos in the most pessimistic source models, and ~50 events per year are expected for the standard models. The instrument will also detect UHECRs and possibly FRBs. Here we show how our preliminary design should enable us to reach our sensitivity goals, and discuss the steps to be taken to achieve GRAND, while the compelling science case for GRAND is discussed in more details in [1].

DISCOVERY OF A TRANSIENT GAMMA-RAY COUNTERPART TO FRB 131104

We report our discovery in Swift satellite data of a transient gamma-ray counterpart (3.2

Synchrotron pair halo and echo emission from blazars in the cosmic web: application to extreme TeV blazars

\sigma

Double Neutron Star Mergers and Short Gamma-ray Bursts: Long-lasting High-energy Signatures and Remnant Dichotomy

confidence) to the fast radio burst FRB131104, the first such counterpart to any FRB. The transient has duration

Blazar Flares as an Origin of High-Energy Cosmic Neutrinos?

T_{90} \gtrsim 100

A search for correlation of ultra-high energy cosmic rays with IRAS-PSCz and 2MASS-6dF galaxies

s and fluence

High-energy cosmic ray nuclei from tidal disruption events: Origin, survival, and implications

S_\gamma\approx 4\times 10^{-6}

Identifying ultrahigh-energy cosmic-ray accelerators with future ultrahigh-energy neutrino detectors

erg cm

Time dependence of AGN pair echo, and halo emission as a probe of weak extragalactic magnetic fields

^{-2}

The Giant Radio Array for Neutrino Detection (GRAND) : Present and Perspectives

, increasing the energy budget for this event by more than a billion times; at the nominal