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Fig. 5
Scatter plot and the linear fits (red solid line) between the cut-off frequency and peak frequency in the 1700 Å a); 1600 Å b); and 304 Å c) data. The diamond symbols represent the measurements in sunspot AR11131 (08 Dec. 2010), while dot symbols indicate the data obtained for sunspot AR11330 (27 Oct. 2011).
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