TeV gamma-ray spectral spikes produced by magnetic reconnection in blazar jets: the case of the 2014 high state of Markarian 501

João G. Giesbrecht Formiga Paiva, Elisabete M. de Gouveia Dal Pino, Juan C. Rodríguez-Ramírez +2

Multi-wavelength monitoring of the flaring blazar Markarian 501 during July 2014 revealed a TeV gamma-ray spike feature with 3-4$\sigma$ significance and coincident with a prominent enh…