Probing Saraswati's heart: evaluating the dynamical state of the massive
  galaxy cluster A2631 through a comprehensive weak-lensing and dynamical
  analysis
  In this work, we investigate the dynamical state of the galaxy cluster Abell
2631, a massive structure located at the core of the Saraswati supercluster. To
do this, we first solve a tension found in the literature regarding the
weak-lensing mass determination of the cluster. We do this through a
comprehensive weak-lensing analysis, exploring the power of the combination of
shear and magnification data sets. We find $M_{200}^{\rm wl} =
8.7_{-2.9}^{+2.5} \times 10^{14}$ M$_\odot$. We also determined the mass based
on the dynamics of spectroscopic members, corresponding to $M_{200}^{\rm dy} =
12.2\pm3.0 \times 10^{14}$ M$_\odot$, consistent within a 68 per cent CL with
the weak-lensing estimate. The scenarios provided by the mass distribution and
dynamics of galaxies are reconciled with those provided by X-ray observations
in a scenario where A2631 is observed at a late stage of merging.
