Basic Performance for hard X-ray Polarimeter Using MAPMT

Introduction In X-ray astronomy, various information on stellar objects has been obtained through the energy spectrum, the time variability, and the image. Though the observation for the polarization is also very important, the observation has been rarely carried out. So we have been developing a hard X-ray polarimeters, applying new technology[1] and had several basic experiments in KEK PF BL14A to investigate the basic performance of the prototype polarimeter.