Using NASA’s Swift and Chandra space observatories, astronomers have investigated an ultraluminous X-ray pulsar known as M51 ULX-7. The study, detailed in a paper published February 16 on the arXiv pre-print server, sheds more light on the X-ray variability of this source.
![](https://scx1.b-cdn.net/csz/news/tmb/2021/ultraluminou.jpg)
Source:
https://phys.org/news/2021-02-ultraluminous-x-ray-pulsar-m51-ulx-.html