Speaker
Description
NGC 1566 is one of only a handful of AGN that have undergone more than one changing-look event, having changed from Sy 1.9 to Seyfert 1.2 and at least five times. The most recent event was in 2018, where the source increased in X-ray flux by a factor of ~70 and nearly three magnitudes in the UV in under 9 months, coinciding with the reappearance of strong broad lines in the optical spectra.
For the first time, high quality X-ray spectra were taken at the peak of the outburst. The spectra show a classic Seyfert 1 X-ray spectrum, with a soft excess, compton hump, and iron line, as well as outflowing absorption in the high-resolution RGS spectrum. The remarkable speed with which this ‘standard’ AGN develops, and the repeating nature, offers a unique insight into the changing look phenomenon.
| Affiliation | ESA/ESAC |
|---|---|
| Topic | Active Galactic Nuclei: accretion physics and evolution across cosmic time |
