Flat Spectrum Radio Quasars through the MAGIC glasses

Abstract

<p> &nbsp;The detection of Flat Spectrum Radio Quasars (FSRQs) in the Very High Energy (VHE, E&gt;100</p> <div> GeV) range is challenging, mainly because of their steep spectra in this energy band. Up to now,</div> <div> only five FSRQs are known to be VHE &gamma;-ray emitters, all of them have been detected by the</div> <div> MAGIC telescopes, that discovered four of them in the VHE band. The observations in the VHE</div> <div> band are crucial to understand their emission, specially to constrain the location of the emitting</div> <div> region within the jet due to the absorption from their broad line region (BLR). Typically, FS-</div> <div> RQs are detected during high flux states, enhancing the probability of detection with the current</div> <div> instruments sensitivities. However, the last observation campaigns performed with the MAGIC</div> <div> telescopes show emission during moderate states, thus challenging our understanding of the emis-</div> <div> sion mechanisms in FSRQs. In this contribution, we give an overview and present the most recent</div> <div> results of the three FSRQs 3C279, PKS1222+21 and PKS1510-089 in a multi-wavelength context</div> <div> with special focus on MAGIC and Fermi-LAT simultaneous observations.</div>