Using the Suzaku satellite, Japanese astronomers have detected a transient X-ray source in a nearby galaxy known as NGC 4945. The newly discovered source, designated Suzaku J1305−4930, appears to be a black hole binary. The finding is detailed in a paper published July 8 on the arXiv pre-print repository.
Source:
https://phys.org/news/2020-07-transient-x-ray-source-galaxy-ngc.html