Recipes for bolometric corrections and Gaia luminosities of B-type
  stars: Application to an asteroseismic sample
  We provide three statistical model prescriptions for the bolometric
corrections appropriate for B-type stars as a function of: 1) T_eff, 2) T_eff,
log g, and 3) T_eff, log g, [M/H]. These statistical models have been
calculated for 27 different filters, including those of the Gaia space mission,
and were derived based on two different grids of bolometric corrections
assuming LTE and LTE+NLTE, respectively. Previous such work has mainly been
limited to a single photometric passband without taking into account NLTE
effects on the bolometric corrections. Using these statistical models, we
calculate the luminosities of 34 slowly pulsating B-type (SPB) stars with
available spectroscopic parameters, to place them in the Hertzsprung-Russell
diagram and compare their position to the theoretical SPB instability strip. We
find that excluding NLTE effects has no significant impact on the derived
luminosities for the temperature range 11500-21000 K. We conclude that
spectroscopic parameters are needed in order to achieve meaningful luminosities
of B-type stars. The three prescriptions for the bolometric corrections are
valid for any galactic B-type star with effective temperatures and surface
gravities in the ranges 10000-30000 K and 2.5-4.5 dex, respectively, covering
regimes below the Eddington limit.
