Manganaro, MarinaPedaletti, GiovannaDoert, MarleneBastieri, DenisRamazani, Vandad FallahGasparrini, DarioLindfors, ElinaLott, BenoitNievas, MireiaRani, BinduThompson, David J.Angelakis, EmmanouilBorman, GeorgeGurwell, MarkHovatta, TalvikkiItoh, RyosukeJorstad, SvetlanaKraus, AlexKrichbaum, Thomas P.Kuin, PaulLähteenmäki, AnneLarionov, ValeriLien, Amy YarleenMyserlis, IoannisTornikoski, MerjaTroitsky, IvanZensus, J. Anton2019-11-202019-11-202016-11-24http://hdl.handle.net/2003/38388http://dx.doi.org/10.17877/DE290R-20321S5 0716+714 is a well known BL Lac object, and one of the brightest and most active blazars. The discovery in the Very High Energy band (VHE, E > 100 GeV) by MAGIC happened in 2008. In January 2015, the source went through the brightest optical state ever observed, triggering MAGIC follow-up and a VHE detection with ∼ 13σ significance (ATel ♯6999 ). Rich multiwavelength coverage of the flare allowed us to construct the broad-band spectral energy distribution of S5 0716+714 during its brightest outburst. In this work, we will present the preliminary analysis of MAGIC and Fermi-LAT data of the flaring activity in January and February 2015 for the HE (0.1 < HE < 300 GeV) and VHE band, together with radio (Metsähovi, OVRO, VLBA, Effelsberg), sub-millimeter (SMA), optical (Tuorla, Perkins, Steward, AZT-8+ST7, LX-200, Kanata), X-ray and UV (Swift-XRT and UVOT), in the same time-window and discuss the time variability of the multiwavelength light curves during this impressive outburst.enBL Lacertae objects: individual: S5 0716+714Galaxies: activeGamma-rays: galaxies530Text