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

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

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..499r&link_type=abstract

X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer

Astronomy and Astrophysics

Astronomy

X-Ray Spectroscopy, Seyfert Galaxies, Accretion Disks, Spectrometers, X-Ray, Active And Peculiar Galaxies And Related Systems, Infall, Accretion, And Accretion Disks, Photometric, Polarimetric, And Spectroscopic Instrumentation

Scientific paper

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 κ2-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.

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