High resolution observation of Ark 564: I. Time-average spectrum

Abstract:

We present an analysis of a 100 ks X-ray spectrum of the Narrow-Line Seyfert 1 Galaxy Ark 564, which we have taken with the Low Energy Transmission Grating Spectrometer (LETGS) on board the X-ray telescope Chandra. We fit several spectral continuum models to the time-averaged X-ray spectrum of this galaxy, and study the possible origin of the steep soft X-ray spectrum. Also, we characterize the average intrinsic absorption of the system, based on photoionization modeling. Using χ2 - statistics, we compare several of these spectral models, and arrive at possible solutions for the description of (1) the intrinsic emission continuum, and (2) the intrinsic absorption of the system. © 2010 American Institute of Physics.

Año de publicación:

2010

Keywords:

• X-ray telescope
• Absorption lines
• Seyfert 1 Galaxy

Fuente:

scopus