Evidence for a resonant cyclotron line in IGR J16493−4348 from the Swift-BAT hard X-ray survey A. D’Aì, G. Cusumano, V. La Parola, A. Segreto, T. Di Salvo, R. Iaria and N. R. Robba A&A, 532 (2011) A73 Published online: 26 July 2011 DOI: 10.1051/0004-6361/201117035