Analysis of RHESSI Flares Using aRadio Astronomical Technique |
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| Authors: | E. J. Schmahl R. L. Pernak G. J. Hurford J. Lee S. Bong |
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| Affiliation: | (1) Astronomy Department, University of Maryland, College Park, MD 20742, USA;(2) Laboratory for Solar and Space Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA;(3) Institute for Astrophysics and Computational Sciences, The Catholic University of America, Washington, DC 20064, USA;(4) Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA;(5) Center for Solar and Terrestrial Research, New Jersey Institute of Technology, Newark, NJ 07102, USA;(6) Korean Astronomy and Space Science Institute, Daejeon, 305-348, Korea |
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| Abstract: | We have used Ramaty High Energy Solar Spectroscopic Imager (RHESSI) modulation profiles in the 25 – 300 keV range to construct high-fidelity visibilities of 25 flares having at least two components. These hard X-ray visibilities, which are mathematically identical to the visibilities of radio imaging, were input to software developed for mapping solar flares in the microwave domain using the Maximum Entropy Method (MEM). We compared and contrasted the MEM maps with Clean and Pixon maps made with RHESSI software. In particular, we assessed the reliability of the maps and their morphologies for future investigations of the symmetry of bipolar electron beaming in the sample set. |
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| Keywords: | Sun: X-rays Sun: flares Instruments Image processing Numerical methods |
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