We present the results of the analysis of the X-ray spectrum of the Seyfert 2 Mrk 348, observed by Suzaku and XMM-Newton. The overall spectrum of Mrk 348 can be described by a primary power-law continuum seen through three layers of absorption, of which one is neutral and two are ionized. Comparing Suzaku (2008) and XMM-Newton (2002) observations we find variability of the X-ray spectral curvature. We suggest that the variability can be explained through the change of column density of both the neutral and one of the ionized absorbers, together with a variation of the ionization level of the same absorber. We thus confirm one of the main features presented in past works, where intrinsic column density variability up to ~1023 cm-2 was observed on time-scales of months.We also find that the photon index of the underlying power-law continuum (τ~ 1.8) is in agreement with the previous observations of this Seyfert 2. © 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Marchese, E., Braito, V., Reeves, J., Della Ceca, R., Caccianiga, A., Markowitz, A., et al. (2014). The variable ionized absorber in the Seyfert 2 Mrk 348. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 437(3), 2806-2815 [10.1093/mnras/stt2101].
The variable ionized absorber in the Seyfert 2 Mrk 348
MARCHESE, ELENA
;
2014
Abstract
We present the results of the analysis of the X-ray spectrum of the Seyfert 2 Mrk 348, observed by Suzaku and XMM-Newton. The overall spectrum of Mrk 348 can be described by a primary power-law continuum seen through three layers of absorption, of which one is neutral and two are ionized. Comparing Suzaku (2008) and XMM-Newton (2002) observations we find variability of the X-ray spectral curvature. We suggest that the variability can be explained through the change of column density of both the neutral and one of the ionized absorbers, together with a variation of the ionization level of the same absorber. We thus confirm one of the main features presented in past works, where intrinsic column density variability up to ~1023 cm-2 was observed on time-scales of months.We also find that the photon index of the underlying power-law continuum (τ~ 1.8) is in agreement with the previous observations of this Seyfert 2. © 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
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