The magnetic field and the location of the TeV emitter in Cygnus X-1 and LS 5039 V. Bosch-Ramon, D. Khangulyan and F. A. Aharonian A&A, 489 2 (2008) L21-L24 Published online: 11 September 2008 DOI: 10.1051/0004-6361:200810645