Tramacere, A.A.TramacereGiommi, PaoloPaoloGiommiPerri, MatteoMatteoPerriVerrecchia, FrancescoFrancescoVerrecchiaTosti, G.G.Tosti2020-09-172020-09-172010-10-01https://hdl.handle.net/20.500.13025/1650Accretion and Ejection in AGN a Global View. Proceedings of a conference held June 22-26, 2009 in Como, Italy. Edited by Laura Maraschi, Gabriele Ghisellini, Roberto Della Ceca, and Fabrizio Tavecchio., p.215We present the results of a deep spectral analysis of all Swift observations of Mrk 421 between April 2006 and July 2006, when it reached its highest X-ray flux recorded until the end of 2006. We investigate the correlation between the spectral parameters and we find signature of both stochastic acceleration and energetic budget of the jet.Signature of Stochastic Acceleration and Jet Energetics in the X-ray Spectrum of Mrk 421http://adsabs.harvard.edu/abs/2010ASPC..427..215T2010ASPC..427..215T