Extended CH3OH maser flare excited by a bursting massive YSO L. Moscadelli, A. Sanna, C. Goddi, M. C. Walmsley, R. Cesaroni, A. Caratti o Garatti, B. Stecklum, K. M. Menten and A. Kraus A&A, 600 (2017) L8 Published online: 03 April 2017 DOI: 10.1051/0004-6361/201730659