ISOCAM VIEW OF HIGH-ENERGY SOURCES

We report the discovery of warm dust in the surroundings of the compac t high energy sources SS433 and Cygnus X-1. In the jets of SS433 we ha ve observed the infrared counterpart of the brighter X-ray knot at a d istance of 50 pc from the compact source. The observation reported her e suggests that dust formation takes place in the ejecta, and that the ir infrared luminosity exceeds their X-ray luminosity. In Cygnus X-1 w e find that the compact source is surrounded by an infrared envelope o f 0.2 pc radius. We propose that besides a gaseous component, warm dus t components contribute to the infrared emission from the extended env elope.