Multi-wavelength study of flaring activity in BL Lac object S5 0716+714 during 2015 outburst

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We present a detailed investigation of the flaring activity observed from a BL Lac object, S5 0716+714 , during its brightest ever optical state in the second half of January 2015.

• Observed almost simultaneously in the optical, X-rays and {\gamma}-rays, a significant change in the degree of optical polarization (PD) and a swing in the position angle (PA) of polarization were recorded.
• A detection in the TeV (VHE) was also reported by the MAGIC consortium during this flaring episode.
• Two prominent sub-flares, peaking about 5-days apart, were seen in almost all the energy bands.