GalRotpy: an educational tool to understand and parametrize the rotation
  curve and gravitational potential of disk-like galaxies
  \textbf{GalRotpy} is an educational \verb+Python3+-based visual tool, which
is useful to undestand how is the contribution of each mass component to the
gravitational potential of disc-like galaxies by means of their rotation curve.
Besides, \textbf{GalRotpy} allows the user to perform a parametric fit of a
given rotation curve, which relies on a MCMC procedure implemented by using
\verb+emcee+ package. Here the gravitational potential of disc-like galaxies is
built from the contribution of a Miyamoto-Nagai potential model for the
bulge/core and the thin/thick disc, an exponential disc, together with the NFW
(Navarro-Frenk- White) potential or the Burkert (cored density profile)
potential for the Dark Matter halo, where each contribution is implemented by
using \verb+galpy+ package. We summarize the properties of each contribution to
the rotation curve involved, and then describe how \textbf{GalRotpy} is
implemented along with its capabilities. Finally we present the
characterization of two galaxies, NGC6361 and M33, and show that the results
for M33 provided by \textbf{GalRotpy} are consistent with those found in the
literature.
