Properties of Warm absorbers in Narrow-Line Seyfert 1 galaxies
S. Komossa
Abstract
We present a study of the X-ray properties of several NLS1 galaxies, focusing on their warm absorbers. In the first part, we discuss properties of dusty and dust-free warm absorbers in NLS1s, and study their potential contribution to high-ionization optical iron lines. In the second part, we summarize our work on the exceptional spectral variability of the NLS1 galaxy RX J0134.3-4258 (from Gamma about -4.4 in the ROSAT all-sky survey observation, to about -2.2 in our subsequent pointed observation).
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