Speaker
Alicia Fattorini
(TU Dortmund)
Description
With the first measured correlation of an extremely high-energy
neutrino event and a flaring
gamma-ray source in September 2017, multimessenger astronomy has become
more important
than ever. The stereoscopic IACT system MAGIC, located at La Palma, Canary
Islands, is in-
volved in neutrino follow-up campaigns since 2012. The MAGIC telescopes
are sensitive for
gamma events with energies from the ∼30 GeV range up to tens of TeV.
When a potential astro-
physical neutrino is detected by IceCube, an alert with the reconstructed
coordinates is published.
MAGIC, making use of an automated alert response system, performs
follow-up observations
in search of a correlated gamma-ray flux. The reconstructed neutrino
direction is given with an
uncertainty, typically around 0.2
◦–1◦
. As the angular resolution of MAGIC is much smaller, the
analysis for discovering sources in a given region has to be modified. In
case of a non detection, in
order to interpret the data correctly, an information about flux upper
limits in the whole IC event
error region should be given. Here we present a method to produce sky maps
for identifying point
sources or deriving flux upper limits on the desired sky region, based on
a maximum likelihood
approach included in the SkyPrism software. Examples of results from MAGIC
observations of
IC-170922A and other IceCube alerts will be shown.
Primary author
Alicia Fattorini
(TU Dortmund)
