Space and laboratory observation of the deuterated cyanomethyl radical HDCCN C. Cabezas, Y. Endo, E. Roueff, N. Marcelino, M. Agúndez, B. Tercero and J. Cernicharo A&A, 646 (2021) L1 Published online: 29 January 2021 DOI: 10.1051/0004-6361/202040210