TON S180

[3][4][5] It has a prototype 'bare' active galactic nucleus with a total infrared luminosity of Lbol ~ 5 x1045 erg s−1, but no traces of absorption.

[7] In addition, TON S180 has a short galactic column density along the line of sight, approximately NH = 1.52 x 1020 cm−2.

[2] It contains a sharp and narrow iron line, as well as having a smooth soft excess unable to be produced by relativistic reflection based on observations of its X-ray spectrum.

Every few thousand seconds, its X-ray flux would show a factor of 2 variability, which, comparing to both the 0.5-2 and 2-10 keV bands, the former has a significantly high σ 2 root mean square.

[8] According to the Far Ultraviolet Spectroscopic Explorer, which acquired a high-resolution spectra for the galaxy, TON S180 shows ultraviolet absorption by five-times ionized oxygen but no hydrogen absorption, indicating its absorbing gas is currently in a high ionization state.