Coma revealed as an extended hard X-rays source by INTEGRAL IBIS/ISGRI M. Renaud, G. Bélanger, J. Paul, F. Lebrun and R. Terrier A&A, 453 1 (2006) L5-L8 Published online: 09 June 2006 DOI: 10.1051/0004-6361:20065157