HATS-43b, HATS-44b, HATS-45b, and HATS-46b: Four Short Period Transiting Giant Planets in the Neptune-Jupiter Mass Range
  We report the discovery of four short period extrasolar planets transiting
moderately bright stars from photometric measurements of the HATSouth network
coupled to additional spectroscopic and photometric follow-up observations.
While the planet masses range from 0.26 to 0.90 M$_J$, the radii are all
approximately a Jupiter radii, resulting in a wide range of bulk densities. The
orbital period of the planets range from 2.7d to 4.7d, with HATS-43b having an
orbit that appears to be marginally non-circular (e= 0.173$\pm$0.089). HATS-44
is notable for a high metallicity ([Fe/H]= 0.320$\pm$0.071). The host stars
spectral types range from late F to early K, and all of them are moderately
bright (13.3<V<14.4), allowing the execution of future detailed follow-up
observations. HATS-43b and HATS-46b, with expected transmission signals of 2350
ppm and 1500 ppm, respectively, are particularly well suited targets for
atmospheric characterisation via transmission spectroscopy.
