Ultraluminous X-ray source in Whale galaxy investigated for spectral and timing variability

Astronomers from Germany and Turkey have analyzed available data from various space telescopes to investigate an ultraluminous X-ray source designated X-4, which is located in the nearby galaxy NGC 4631.

Results of the new study, published June 22 on the preprint server arXiv, yield important insights into the spectral and timing variability of this source. ...