DIRECT DEMODULATION TECHNIQUE FOR ROTATING MODULATION COLLIMATOR IMAGING

Rotating modulation collimator (RMC) is an important imaging technique in hard X-ray astronomy. With traditional inversion techniques, the s ensitivity, angular resolution and ability of simultaneous imaging of point sources and extended emission are not good Enough in many practi cal cases. In this work, a new inversion technique, the direct demodul ation method, is applied to analyse simulated data of an RMC telescope . The results show that the image quality from direct demodulation are improved significantly in comparison with that from traditional inver sion techniques, such as the cross-correlation method and the CLEAN cr oss-correlation method. From an RMC telescope with a simple bi-grid co llimator and the direct demodulation technique, we can do imaging for both discrete and extended sources.