Seminars and Journal Clubs

Searching for IceCube neutrinos from blazar flares [BEL-center:pheno]

by Christoph Raab (CP3 - UCLouvain)

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

E/3rd floor-E.349 - Seminar room (E.349)

Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve)


Blazars are candidate extragalactic cosmic ray accelerators, and could be confirmed as such by multi-messenger astronomy. Fermi-LAT and IceCube have been used to search for neutrinos in time correlation with the gamma-ray emission from blazars, which has been observed to flare by orders of magnitude. In my PhD thesis, I first focused on TXS 0506+056, whose flare in 2017 coincided with arrival of the neutrino alert IceCube-170922A.  I also extended the principle by "stacking" the signal from multiple blazar flares, as their individually undetectable neutrino emission could still be discoverable this way. I selected 179 bright and variable blazars, divided them into two classes and assigned them statistical weights.