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We have been developing a Compton-scattering-type hard-X-ray polarimeter sensitive over the energy range from ~ 60 keV to ~ 300 keV for Gamma-Ray Burst (GRB) studies. The polarimeter consists of four identical modules each with a field of view of ±45°. To estimate the instrument performance accurately, we have investigated the instrument's response for gamma rays incident off-axis. We report here...
We have developed a design for a hard X-ray Compton polarimeter operating in the energy range from 50 to 500 keV, which we refer to as GRAPE (Gamma-Ray Polarimeter Experiment). We are currently preparing a balloon payload for a flight from Ft. Sumner, NM in the fall of 2011. Using a large (16-element) array of detector modules, this payload is being designed to search for polarization from known point...
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