Presentation #204.04 in the session “Missions and Instruments (Oral)”.
We describe Glowbug, a gamma-ray telescope for Gamma Ray Bursts (GRBs) and other transients in the 30 keV to 2 MeV band funded by the NASA Astrophysics Research and Analysis program. Built by the U.S. Naval Research Laboratory, the instrument will be launched to the International Space Station by the DoD Space Test Program in early 2023. Glowbug’s primary science objective is the detection and localization of short GRBs, which are the result of mergers of stellar binaries involving a neutron star with either another neutron star or a black hole. While the instrument is designed to complement existing GRB detection systems, it serves as a technology demonstrator for future networks of sensitive, low-cost gamma-ray transient detectors that provide all-sky coverage and improved localization of such events. Of greatest interest are the binary neutron star systems within the detection horizon of ground-based gravitational-wave interferometers. In a full mission life, Glowbug will detect dozens of short GRBs and provide burst spectra, lightcurves, and positions for gamma-ray context in multi-wavelength and multi-messenger studies of these merger events.