Joseph Plowman, Charles Kankelborg, Petrus Martens, Jason Scott, Miriam Ritchie, Rahul Sharma
We present a fast method for reconstructing Differential Emission Measures (DEMs) using solar coronal data. The method averages over 1000 DEMs per second for an example active region observed by the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO), and achieves reduced chi-squared of order unity with no negative emission in all but a few test cases. The high performance of this method is especially relevant in the context of AIA, which images of order one million solar pixels per second. This paper describes the method, analyzes its fidelity, compares its performance and results with other DEM methods, and applies it to an active region and loop observed by AIA and by the Extreme-ultraviolet Imaging Spectrometer (EIS) on Hinode.
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http://arxiv.org/abs/1204.6306
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