Fig. 3
Spectroscopic evolution of the LBV and SN, including two epochs during the LBV outbursts (episode 2013, –559 d and episode 2015A at –39 d) and a closely sampled time-series during the possible SN explosion from May 16 to June 19 (–7 to +27 d). After a gap in the observations due to sun constraints we obtained four new spectra in late September (+126 d), November 2015 (+181 d), December (+195.4 d) and January 2016 (+242 d).
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