A search for spectral features in the XMM-Newton observation of UGC11763

M.V. CARDACI, M. SANTOS-LLEÓ, Y. KRONGOLD, P. RODRÍGUEZ-PASCUAL, G.F. HÄGELE, A.I. DÍAZ

Huatulco

Congreso; The Nuclear Region, Host Galaxy and Environment of Active Galaxies; 2007

Universidad Nacional Autónoma de México

We have performed the analysis of the X-ray XMM-Newton spectra of the narrow line Seyfert 1 galaxy UGC11763 (Mkn 1513). We have studied the EPIC data in the range0.35-10.0 keV (1.2-35.4 A) and also the high resolution soft X-ray spectra taken with theReflection Grating Spectrometers (RGSs) in the range 10-30 A (0.41-1.2 keV). Theprincipal feature observed in the hard X-ray spectrum is a weak Fe-K fluorescence line. The soft X-ray spectra are characterised by absorption features. The most signicantof them is the one between 15 and 18 A (in the rest frame of the object). We have identied this broad absorption with the UTA (unresolved transition array) produced by Fe M-shell transitions which was reported for the first time by Sako et al. (2001), and that is indicative of the presence of absorbing material in the vicinity of the active nucleus.