An international team of astronomers has identified a new ultraluminous X-ray source (ULX) in the galaxy NGC 7090. The object, designated NGC 7090 ULX3, was found using NASA’s Swift spacecraft. The finding is detailed in a paper published November 17 on the arXiv pre-print repository.
Source:
https://phys.org/news/2020-11-transient-ultraluminous-x-ray-source-galaxy.html