Astronomers inspect an ultracompact X-ray binary system

Using the Nuclear Spectroscopic Telescope Array (NuSTAR) spacecraft and the Neutron star Interior Composition Explorer (NICER) instrument onboard the International Space Station, astronomers have inspected an ultracompact X-ray binary known as 4U 0614+091. Results of the observational campaign, published Aug. 29 on the pre-print server arXiv, yield important insights into the behavior of this system.