Multiwavelength study of the gamma-ray blazar PKS 1424+240: a neutrino candidate

This thesis regards the study of the very-high energy (VHE; E>100 GeV) gamma-ray emission of the blazar PKS 1424+240 observed with the MAGIC telescopes. Blazars are a subclass of jetted active galaxies characterized by intense and variable emission across the spectrum, particularly in the radio, optical X-ray and gamma-ray wavelengths. Firstly discovered at VHE by VERITAS and then confirmed by MAGIC, PKS 1424+240 is a VHE source with redshift z=0.603, which makes it one of the most distant VHE BL Lac known to date. The source has been recently associated by IceCube with a neutrino excess at 3.7 $\sigma$ level, making it a good candidate to be considered as an extragalactic neutrino source, similarly to the blazar TXS 0506+056. This contribution, the MAGIC data analysis, multiwavelength data analyses during a particularly bright phase, in 2017; the spectral and flux variability at different frequencies, and modelled the spectral energy distribution are characterized.