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Probing the Complex and Variable X-ray Absorption of Markarian 6 with XMM-Newton | | S. Immler
; W. N. Brandt
; C. Vignali
; F. Bauer
; D. M. Crenshaw
; J. J. Feldmeier
; S. B. Kraemer
; | | Date: |
1 Apr 2003 | | Journal: | Astron.J. 126 (2003) 153 | | Subject: | astro-ph | | Abstract: | We report on an X-ray observation of the Seyfert 1.5 galaxy Mrk 6 obtained with the EPIC instruments onboard XMM-Newton. Archival BeppoSAX PDS data from 18-120 keV were also used to constrain the underlying hard power-law continuum. The results from our spectral analyses generally favor a double partial-covering model, although other spectral models such as absorption by a mixture of partially ionized and neutral gas cannot be firmly ruled out. Our best-fitting model consists of a power law with a photon index of 1.81+/-0.20 and partial covering with large column densities up to 10^{23} cm**-2. We also detect a narrow emission line consistent with Fe Kalpha fluorescence at 6.45+/-0.04 keV with an equivalent width of ~93+/-25 eV. Joint analyses of XMM-Newton, ASCA, and BeppoSAX data further provide evidence for both spectral variability (a factor of ~2 change in absorbing column) and absorption-corrected flux variations (by ~60%) during the ~4 year period probed by the observations. | | Source: | arXiv, astro-ph/0304032 | | Services: | Forum | Review | PDF | Favorites | |
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