LIGO/Virgo S190707q : No neutrino counterpart candidates in ANTARES search
Abstract
Using on-line data from the ANTARES detector, we have performed a follow-up analysis of the recently reported LIGO/Virgo S190707q event using the 90% contour of the bayestar probability map provided by the GW interferometers (GCN#25012 <https://gcn.gsfc.nasa.gov/gcn3/25012.gcn3>). The ANTARES visibility at the time of the alert, together with the 50% and 90% contours of the probability map are shown at http://antares.in2p3.fr/GW/S190707q.png <http://antares.in2p3.fr/GW/S190707q.png>. Considering the location probability provided by the LIGO/Virgo collaborations, there is a 58.3% chance that the GW emitter was in the ANTARES **upgoing** field of view at the time of the alert. No up-going muon neutrino candidate events were recorded in the ANTARES sky during a +/-500s time-window centered on the time 2019-07-07 09:33:26 and in the 90% contour of the S190707q event. The expected number of atmospheric background events in the region visible by ANTARES is 5.14e-04 in the +/- 500s time window. An extended search during +/- 1 hour gives no up-going muon neutrino coincidence. The expected number of atmospheric background events in the region visible by ANTARES is 3.70e-03 in this larger time window. ANTARES <http://antares.in2p3.fr/> is the largest undersea neutrino detector, installed in the Mediterranean Sea, and it is primarily sensitive to neutrinos in the TeV-PeV energy range. At 10 TeV, the median angular resolution for muon neutrinos is about 0.5 degrees. In the range 1-100 TeV ANTARES has a competitive sensitivity to this position in the sky.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2019
- Bibcode:
- 2019GCN.25013....1A