Abstract In this paper I concentrate on three issues (i) What is the nature of the soft X-ray excess, (ii) the status of the detection of gravitative redshifted soft X-ray lines, and our understanding of the nature of sharp spectral drops observed in the high-energy spectra of Narrow-Line Seyfert 1 Galaxies (NLS1).
Keywords galaxies: active X-rays
It accepts original submissions from all over the world and is internationally published and distributed by IOP