1 The Astrophysical Journal, 623:L53–L56, 2005 April 10 MAGNETIC FREE ENERGY IN NOAA ACTIVE REGION 10486 ON 2003 OCTOBER 29 Thomas R. Metcalf 1,, K. D.

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1 The Astrophysical Journal, 623:L53–L56, 2005 April 10 MAGNETIC FREE ENERGY IN NOAA ACTIVE REGION ON 2003 OCTOBER 29 Thomas R. Metcalf 1,, K. D. Leka, D 2. L. Mickey 3 Received 2004 October 11; accepted 2005 March 1; published 2005 March 17 1 Lockheed Martin Solar and Astrophysics Laboratory 2 Colorado Research Associates Division, NorthWest Research Associates, Inc. 3 Institute for Astronomy, University of Hawaii 太陽雑誌会速報 T.T.Ishii

2

3 Flares in Active Region NOAA Oct. 23a 23b Nov. 2 4

4 RHESSI Light Curve (50-100keV,4s interval) 20 min.

5 Onset (20:37) Peak (20:49) X10 Flare on 2003 Oct. 29 TRACE 1600 A TRACE WL Red and Blue contour SOHO/ MDI (500 Gauss)

6 Chromospheric vector magnetogram Imaging Vector Magnetograph (IVM) Mees Solar Observatory Na I D1 line (5895A) 18:46 – 18:57 UT on 2003 Oct. 29

7 Chromospheric vector magnetogram

8

9 RHESSI Light Curve (50-100keV,4s interval) Unusually large amount of free magnetic energy Increasing ?? just after the impulsive phase (large error) Previous results with the same instrument and method NOAA 7216: 1.2 ± 0.2 (×10 33 ergs) NOAA 8299: 1.3 ± 0.5 (×10 33 ergs)