Fig. 9.
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Hα evolution of ASASSN-13dn. Top: Spectra close to the first detection, broad Hα lines with velocities (vFWHM) close to 14 000 km s−1, and a blueshifted peak. Middle: Persistent asymmetries towards the red part of the line from +38d to +98d at ∼5000 km s−1. Bottom: Last epochs of the light curve. Hα shows asymmetries and a strong P-Cygni profile at +140d. This absorption has a velocity of ∼1100 km s−1.
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