Separation of foregrounds from cosmic microwave background observations with the MAP satellite

Simulated observations of a 10 x 10 deg(2) field by the Microwave Anisotrop y Probe (MAP) are analysed in order to separate cosmic microwave background (CMB) emission from foreground contaminants and instrumental noise and the reby determine how accurately the CMB emission can be recovered. The simula tions include emission from the CMB, the kinetic and thermal Sunyaev-Zel'do vich (SZ) effects from galaxy clusters, as well as Galactic dust, free-free and synchrotron emission. We find that, even in the presence of these cont aminating foregrounds, the CMB map is reconstructed with an rms accuracy of about 20 mu K per 12.6-arcmin pixel, which represents a substantial improv ement as compared to the individual temperature sensitivities of the raw da ta channels. We also find, for the single 10 x 10 deg(2) field, that the CM B power spectrum is accurately recovered for l less than or similar to 600.