Cyanogen, cyanoacetylene, and acetonitrile in comet 67P and their relation to the cyano radical N. Hänni, K. Altwegg, H. Balsiger, M. Combi, S. A. Fuselier, J. De Keyser, B. Pestoni, M. Rubin and S. F. Wampfler A&A, 647 (2021) A22 Published online: 02 March 2021 DOI: 10.1051/0004-6361/202039580