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Quick, cheap, and beautiful x-ray polarimeter

The use of x-ray polarimeters for the study of cosmic sources has been severely limited by the lack of launch opportunities. Thus far, the most significant x-ray-polarimetry experiment was performed by a device aboard the Orbiting Solar Observatory (OSO)-8 satellite in the 1970s. The next polarimetry experiment will be the Stellar X-Ray Polarimeter (SXRP), to be flown on the Russian Spectrum-X satellite in the next few years. Here we describe a simple experiment designed as a dedicated x-ray-polarimetry mission to operate in the 10 - 20 keV band and to complement scientifically the SXRP.