Using the Chandra and XMM-Newton spacecraft, astronomers from the Nicolaus Copernicus Astronomical Center in Warsaw, Poland, have investigated an ultraluminous X-ray source (ULX) in the galaxy NGC 5055. The study, detailed in a paper published August 5 on the arXiv preprint server, provides more insight into the properties of this source.
Source:
https://phys.org/news/2020-08-astronomers-ultraluminous-x-ray-source-ngc.html