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25 April 2024 |
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The origin of the strong soft excess and puzzling iron line complex in Mkn 841 | | P. O. Petrucci
; G. Ponti
; G. Matt
; L. Maraschi
; J. Malzac
; M. Mouchet
; C. Boisson
; A. Longinotti
; K. Nandra
; P. Ferrando
; G. Henri
; | | Date: |
21 Nov 2006 | | Journal: | Astronomische Nachrichten 327, No. 10, 1043-1046 (2006) | | Abstract: | Mkn 841 has been observed during 3 different periods (January 2001, January 2005 and July 2005) by XMM-Newton for a total cumulated exposure time of ~108 ks. We present in this paper a broad band spectral analysis of the complete EPIC-pn data sets. These observations confirm the presence of the strong soft excess and complex iron line profile known to be present in this source since a long time. They also reveal their extreme and puzzling spectral and temporal behaviors. Indeed, the 0.5-2 keV soft X-ray flux decreases by a factor 3 between 2001 and 2005 and the line shape appears to be a mixed of broad and narrow components, both variable but on differen timescales. The broad-band 0.5-10 keV spectra are well described by a model including a primary power law continuum, a blurred photoionized reflection and a narrow iron line, the blurred reflection fitting self-consistently the soft excess and the broad line component. The origin and nature of the narrow component is unclear. | | Source: | arXiv, astro-ph/0611665 | | Services: | Forum | Review | PDF | Favorites | |
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