  We describe Glowbug, a gamma-ray telescope for bursts and other transients in
the 30 keV to 2 MeV band. It was recently selected for funding by the NASA
Astrophysics Research and Analysis program, with an expected launch in the
early 2020s. Similar in concept to the Fermi Gamma Burst Monitor (GBM) and with
similar sensitivity, Glowbug will join and enhance future networks of burst
telescopes to increase sky coverage to short Gamma-Ray Bursts (SGRBs) from
binary neutron star (BNS) mergers, including possible SGRBs from NS-black hole
mergers. With the recent discovery of the SGRB coincident with the
gravitational wave transient GW170817, we know such events occur with
reasonable frequency. Expanded sky coverage in gamma rays is essential, as more
detections of gravitational waves are expected with the improved sensitivity of
the upgraded ground-based interferometers in the coming years.
