2 papers
astro-ph2001
Variability of Soft X-ray Spectral Shape in Blazars Observed by ROSAT
Linpeng Cheng, Yongheng Zhao, Janyan Wei
In paper 1 (Cheng et al. 2001) we have shown that the soft X-ray spectra of two types of Seyfert 1 galaxies statistically vary differently with increasing intensity. In order to un…
astro-ph2001
Variability of Soft X-ray Spectral Shape: Narrow-Line Seyfert 1 Galaxies versus Broad-Line Seyfert 1 Galaxies
Linpeng Cheng, Jianyan Wei, Yongheng Zhao
In order to understand how the soft X-ray spectra vary we present the Hardness Ratio 1 versus Count Rates (HR1-CTs) correlation of 8 Narrow-line Seyfert 1 Galaxies (NLS1s) and 14 B…