Fig. A.1
Comparsion between our Nov. 11, 2013 spectra at the onset of episode 2013A and a model spectrum of an LBV in quiescence with L = 1 × 106L⊙, Teff = 8500 K, a mass loss rate of Ṁ = 5 × 10-4M⊙ yr-1 and a wind terminal speed of 600 km s-1. The model spectrum was downgraded to the resolution of the observed spectrum. The lines present are mainly Balmer lines, NaD, Ca II and Fe II.
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