3C 273 at its lowest: X-ray, γ-ray, and multiwavelength observations between 2003 and 2005. Chernyakova, M; Neronov, A; Courvoisier, T.J.-L; Türler, M; Soldi, S; Walter, R; Beckmann, V; Lubinski, P; Page, K.L; Stuhlinger, M; Staubert, R; McHardy, I.M. European Space Agency, (Special Publication) ESA SP 2006