High-Energy Neutrino follow-up of first gravitational wave event GW150914

On September 14th 2015, LIGO/Virgo collaboration has detected the first significant gravitational wave event. Consequently, a neutrino followup was performed using both ANTARES and IceCube online data selection to search for a potential neutrino counterpart to this event. No neutrino candidate in both temporal and spatial coincidence with GW150914 had been detected within ± 500 s from the event. This non-detection was used to constrain the neutrino fluence and the total energy emitted in neutrinos for a standard E⁻² source spectrum as well as a spectral cutoff at 100 TeV. This first joint study does demonstrate the multimessenger synergies between ANTARES, IceCube and LIGO/Virgo. A coincident gravitational wave and neutrino detection would open a new era in multimessenger astrophysics. (paper)