  PKS 1510-089 is one of the most variable blazars. Very high energy gamma ray
emission from this source was observed by H.E.S.S. during March-April 2009 and
by MAGIC from February 3 to April 3, 2012 quasi-simultaneously with
multi-wavelength flares. The spectral energy distributions of these flares have
been modeled earlier with the external Compton mechanism which depends on our
knowledge of the densities of the seed photons in the broad line region, the
dusty infrared torus or a hypothetical slow sheath surrounding the jet around
the radio core. Here we show that to explain the multi-wavelength data with
synchrotron emission of electrons and protons the jet power should be of the
order of 10^48 ergs/sec.
