Evidence for TeV gamma ray emission from Cassiopeia A F. Aharonian, A. Akhperjanian, J. Barrio, K. Bernlöhr, H. Börst, H. Bojahr, O. Bolz, J. Contreras, J. Cortina, S. Denninghoff et al. (49 more) A&A, 370 1 (2001) 112-120 Published online: 15 April 2001 DOI: 10.1051/0004-6361:20010243