Prandini, E.E.PrandiniBecerra-Gonzlez, J.J.Becerra-GonzlezLindfors, E.E.LindforsCutini, SaraSaraCutiniGasparrini, DarioDarioGasparrini2020-09-172020-09-172012-12-01https://hdl.handle.net/20.500.13025/2604HIGH ENERGY GAMMA-RAY ASTRONOMY 5th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conference Proceedings, Volume 1505, pp. 647-650 (2012).The BL Lac object PKS 1424+240 with uncertain redshift has been investigated by the MAGIC imaging atmospheric Cherenkov telescopes at very high energies (VHE; E> 100 GeV) since 2006. The source was observed in various emission states and the integral flux above 150 GeV shows hints of variability. We present a detailed analysis of the multi-frequency emission, from radio to VHE gamma rays. We show that a simple one-zone synchrotron self Compton (SSC) model is inadequate to account for the observed spectral behavior. In particular, the synchrotron peak is much broader than the high-energy peak and the separation between the two peaks is large, which requires high Doppler factor for modeling. We investigate the correlation between lightcurves in several wavebands and propose a two-zone SSC model to fit the experimental data where part of the observed emission is due to a parsec scale jet and the remaining part to a more compact region close to the central engine.10.1063/1.4772343http://adsabs.harvard.edu/abs/2012AIPC.1505..647P2012AIPC.1505..647P