Analysis Methods for Neutrino Follow-up Observations with MAGIC
July 22, 2019
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 involved 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 astrophysical 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.
How to cite
Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating
very compact bibliographies which can be beneficial to authors and
readers, and in "proceeding" format
which is more detailed and complete.