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Fig. 13

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Top left: image in the Fe xxiii 263.765 Å line during the flare raster No. 8, showing the selected locations of the Loop Top (LT) and the two footpoint regions, (kernels K1 and K2). The field of view is 40″  ×  120″. Top right: the EIS spectral window containing the Fe xxiii 263.765 Å line during the flare raster No. 8. The thick black spectrum refers to the area of peak emission at the Loop Top (LT), where the line profile is symmetric and at rest wavelength. The spectra in blue are taken from the two footpoint regions, (kernels K1 and K2), and show slightly broadened and blue-shifted line profiles. The bottom figure shows an active region spectrum obtained on 2007 May 21 with the 1″ slit where the presence of two unidentified coronal lines in the blue-wing of Fe xxiii is highlighted. The spectrum is in equivalent count rates, for a direct comparison.

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