Exploring NGC 7582's X-ray Spectral Variability.

Astronomers have used XMM-Newton and NuSTAR space telescopes to observe the nearby active galaxy NGC 7582, shedding light on its X-ray spectral variability. The galaxy is a Type 2 Seyfert galaxy with a changing-look AGN, and the researchers found that the long-term and short-term variability are due to intrinsic changes in the X-ray luminosity of the source and changes in the absorption in the line of sight. The absorber is located at a distance not larger than 1.95 light years from the X-ray source, moving with a transverse velocity exceeding approximately 700 km/s.