Grinberg, V.Boeck, M.Pottschmidt, KatjaPooley, G. G.Wilms, J.Nowak, M. A.Bel, M. CadolleRodriguez, J.Laurent, P.Marcu, D. M.Uttley, P.Tomsick, J. A.Bodaghee, A.Markoff, S. B.Kreykenbohm, I.2023-09-222023-09-222011-04-27Grinberg, V., et al. “Cyg X-1 Entered a Transitional State, May Be on Its Way from the Soft State Back to the Hard State.” ATel 3307 (April 27, 2011). https://www.astronomerstelegram.org/?read=3307.http://hdl.handle.net/11603/29838en-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.RadioX-rayGamma RayBinaryBlack HoleText