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The Suzaku broad-band spectrum of the low-luminosity AGN M81 Lucie Gerard (APC - France) Sara Turrizziana (Tor Vergata - Italy) Ivona Mochol (Cracovia.

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Presentation on theme: "The Suzaku broad-band spectrum of the low-luminosity AGN M81 Lucie Gerard (APC - France) Sara Turrizziana (Tor Vergata - Italy) Ivona Mochol (Cracovia."— Presentation transcript:

1 The Suzaku broad-band spectrum of the low-luminosity AGN M81 Lucie Gerard (APC - France) Sara Turrizziana (Tor Vergata - Italy) Ivona Mochol (Cracovia Univ. - Poland) Filippo D’Ammando (INAF Roma - Italy) Kei Saitou (ISAS - Japan) Renzo Capelli (IASF Mi - Italy) Lorenzo Raimondi (IASF Bo - Italy) Massimo Cappi (IASF Bo - Italy)

2 Open Issue: Understand the origin of High Energy Emission of M81 (the brigthest Nearby LLAGN) Current Knowledge: Complex FeK line structure from BeppoSAX, XMM and Chandra (HETGs) Current possible physical models: i)Reflection (neutral and ionized); ii)Thermal emission (from a hot gas); iii)Photoionization Goal of the present program: Analyse the Suzaku spectrum of the source to discriminate between the three above possibilities

3 The Suzaku observation:  M81 was observed in 2006, May 8th  Exposure Time: 100 ks  XIS0,1,2,3 working nominally (at that time)  A ULX in the FOV M81 ULX Backg

4 Suzaku Broad-band spectrum of M81  ~1.8-1.9 Flux (2-10)~1x10 -11 erg cm -2 s -1 Suzaku Broad-band spectrum of ULX :Convex spectrum…

5 Zooming and fitting the line…

6 Fitting the line…with Chi-2 and C- statistics !!!

7 EW (eV)Flux 2-10 keV 6.4 (keV) 6.7 (keV) 6.9 (keV) 10 -11 (cgs) XMM27-5234-6022-521.1 BEPPO-SAX_64-133_3.8 CHANDRA22-715-5471-1631.0 SUZAKU35-5640-6322-471.1

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