Slit-reconstructed image of the VTT observations with the Echelle spectrograph at different wavelength positions along the Hα line. The giant filament extends over about 800′′ , displays a gap at the left hand side and an EFR appears as a bright area below the thin spine of the filament on the right-hand side. The observations were carried out on 2011 November 15 between 11:38 UT and 13:20 UT. From top to bottom: Hα + 0.5 Å, Hα line core, and Hα − 0.5 Å. The white arrow points to disk center.
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