Discovery of very high energy gamma-ray emission from the blazar 1ES
  0033+595 by the MAGIC telescopes
  The number of known very high energy (VHE) blazars is $\sim\,50$, which is
very small in comparison to the number of blazars detected in other
frequencies. This situation is a handicap for population studies of blazars,
which emit about half of their luminosity in the $\gamma$-ray domain. Moreover,
VHE blazars, if distant, allow for the study of the environment that the
high-energy $\gamma$-rays traverse in their path towards the Earth, like the
extragalactic background light (EBL) and the intergalactic magnetic field
(IGMF), and hence they have a special interest for the astrophysics community.
We present the first VHE detection of 1ES\,0033+595 with a statistical
significance of 5.5\,$\sigma$. The VHE emission of this object is constant
throughout the MAGIC observations (2009 August and October), and can be
parameterized with a power law with an integral flux above 150 GeV of
$(7.1\pm1.3)\times 10^{-12} {\mathrm{ph\,cm^{-2}\,s^{-1}}}$ and a photon index
of ($3.8\pm0.7$). We model its spectral energy distribution (SED) as the result
of inverse Compton scattering of synchrotron photons. For the study of the SED
we used simultaneous optical R-band data from the KVA telescope, archival X-ray
data by \textit{Swift} as well as \textit{INTEGRAL}, and simultaneous high
energy (HE, $300$\,MeV~--~$10$\,GeV) $\gamma$-ray data from the \textit{Fermi}
LAT observatory. Using the empirical approach of Prandini et al. (2010) and the
\textit{Fermi}-LAT and MAGIC spectra for this object, we estimate the redshift
of this source to be $0.34\pm0.08\pm0.05$. This is a relevant result because
this source is possibly one of the ten most distant VHE blazars known to date,
and with further (simultaneous) observations could play an important role in
blazar population studies, as well as future constraints on the EBL and IGMF.
