Searching for water ice in the coma of interstellar object 2I/Borisov Bin Yang, Michael S. P. Kelley, Karen J. Meech, Jacqueline V. Keane, Silvia Protopapa and Schelte J. Bus A&A, 634 (2020) L6 Published online: 31 January 2020 DOI: 10.1051/0004-6361/201937129