PoS(MQW6)089 Unveiling the X-ray broad band continuum and iron line complex in Mkn 841 P.O. Petrucci * 1 , G. Ponti 2 , G. Matt 2 , A. Longinotti 3 , M. Mouchet 4 , C. Boisson 4 , L. Maraschi 2 , J. Malzac 6 , K. Nandra 7 , P.Ferrando 8 1 LAOG, Grenoble, France, 2 Università degli Studi “Roma tre”, Roma, Italy , 3 VILSPA/ESA, Madrid, Spain, 4 LUTH, Obs. Paris/Meudon, France, 5 OAB, Milano, Italy, 6 CESR, Toulouse, France, 7 Imperial College, London, UK, 8 DAPNIA/CEA, Saclay, France E-mail: pierre-olivier.petrucci@obs.ujf-grenoble.fr 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 different 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. VI Microquasar Workshop: Microquasars and Beyond September 18-22 2006 Società del Casino, Como, Italy * Speaker. c  Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/