Landing page for project RG011

Theoretical modelling predicts that processes resulting in neutrino emission should also produce gama-ray radiation. In 2017, IceCube reported high energy neurtino IC 170922A, from a position consistent with the gamma-ray blazar TXS 0506+056, which was also flaring brightly as observed by Fermi-LAT and MAGIC. However, the general picture remains uncertain, both because of statistical and theoretical considerations. From a multi-messenger perspective, it is thus mandatory to be ready to follow up gamma-ray blazars in spatial coincidence with neutrinos. VLBI observations will firstly help in the association of the neutrinos with the blazar and, whenever a connection is made, they will provide information on the parsec scale properties of the jet associated with the neutrino emission. We request here 5 GHz EVN observations of TXS 1100+122 and two other radio sources cospatial with the recently reported IceCube neutrino IC 200109A. Our team includes members of the VLBI and MM community in a synergetic approach that will exploit at best the capabilities of the EVN. This proposal is closely related to the e-EVN approved project EG108, which could not be triggered due to L-band priority in the upcoming e-VLBI session(s).

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197