22-24 May 2013
Physics Department, University "La Sapienza", Roma, Italy
Europe/Rome timezone

Search for neutrino emission of gamma-ray flaring blazars with the ANTARES telescope

22 May 2013, 17:00
30m
Aula Giorgio Careri (first floor) (Physics Department, University "La Sapienza", Roma, Italy)

Aula Giorgio Careri (first floor)

Physics Department, University "La Sapienza", Roma, Italy

Speaker

Mr Agustín Sánchez Losa (IFIC)

Description

The ANTARES telescope, with a duty cycle close to unity and a full hemisphere of the sky at all the times visible, is well suited to detect neutrinos produced in astrophysical transient sources. Assuming a known neutrino production period, the background and point-source sensitivity can be drastically improved by selecting a narrow time window around it. Blazars are radio-loud active galactic nuclei with their jets pointing almost directly towards the observer. They are particularly attractive potential neutrino point sources, since neutrinos and gamma-rays may be produced in hadronic interactions with the surrounding medium as they are the most likely sources of the observed ultra high energy cosmic rays. A strong correlation between the gamma-ray and the neutrino fluxes is expected in this scenario. ANTARES data collected between 2008 and 2011 is analyzed by an unbinned method based on the minimization of a likelihood ratio. The sensitivity of a standard time-integrated point source search in such period has been improved by a factor 2-3 by looking for neutrinos detected during the high state periods of the the gamma-ray light curves of the AGN candidates. The typical width for a flare ranges from 1 to 20 days depending on the source. The results of this analysis will be presented.

Primary authors

Presentation Materials