The 2006 hot phase of Romano's star (GR 290) in M 33 R. F. Viotti, S. Galleti, R. Gualandi, F. Montagni, V. F. Polcaro, C. Rossi and L. Norci A&A, 464 3 (2007) L53-L55 Published online: 12 February 2007 DOI: 10.1051/0004-6361:20067001