Optimising gravitational waves follow-up using galaxies stellar mass
  We present a new strategy to optimise the electromagnetic follow-up of
gravitational wave triggers. This method is based on the widely used galaxy
targeting approach where we add the stellar mass of galaxies in order to
prioritise the more massive galaxies. We crossmatched the GLADE galaxy catalog
with the AllWISE catalog up to 400Mpc with an efficiency of $\sim$93\%, and
derived stellar masses using a stellar-to-mass ratio using the WISE1 band
luminosity. We developed a new grade to rank galaxies combining their 3D
localisation probability associated to the gravitational wave event with the
new stellar mass information. The efficiency of this new approach is
illustrated with the GW170817 event, which shows that its host galaxy, NGC4993,
is ranked at the first place using this new method. The catalog, named
Mangrove, is publicly available and the ranking of galaxies is automatically
provided through a dedicated web site for each gravitational wave event.
