Hard X-ray all-sky imaging with BATSE/CGRO |
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Authors: | S. N. Zhang B. A. Harmon G. J. Fishman W. S. Paciesas |
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Affiliation: | (1) NASA/Marshall Space Flight Center, 35812 Huntsville, AL, USA;(2) University of Alabama in Huntsville, 35899 Huntsville, AL, USA |
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Abstract: | The large Area Detectors (LADs) of the BATSE experiment aboard the Compton Gamma-ray Observatory have been used recently as the first hard X-ray all-sky imager at energies between 20 keV and 300 keV. The Earth occultation process is formulated in terms of a curved Radon transform convoluted by a step transform in a selected field of view (FOV) ranging from 5°×5° to 40°×40°. The Maximum Entropy Method is then used to reconstruct an image in the hard X-ray sky. Multiple images of different regions of the sky can be produced simultaneously. A source location accuracy of 0.1° for strong sources and a sensitivity limit of 100 mCrab have been achieved in an one-day integration period.Invited Paper on Imaging in High Energy Astronomy , Sept., 1994, Capri, Italyalso Universities Space Research Association |
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Keywords: | /content/t31r3462927148p0/xxlarge947.gif" alt=" gamma" align=" MIDDLE" BORDER=" 0" >-rays Imaging-Earth Occultation Radon Transform Maximum Entropy |
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