An ASCA Observation of M51 (NGC 5194): Iron K Emission from an Obscured Active Galactic Nucleus
Authors: Y. Terashima, A. Ptak, R. Fujimoto, M. Itoh, H. Kunieda, K. Makishima, and P.
J. Serlemitsos
Terashima et
al.
1998 The Astrophysical Journal496210.
Provider: AAS Journals
Caption: Fig. 4.
Confidence contours for the iron line energy and normalization. Contour levels correspond to 68%, 90%, and 99% confidence levels from inside to outside.