Fig. 6
Physical model of transient plus multiple stellar populations fitted to the nuclear spectra (radius of 0.′′5) in the MUSE wavelength range. The 2016 data returns broad features in the residuals, for example at 4200 Å or 5300 Å, which are less pronounced in the 2017 data. These residuals represent hence likely deviations from the transient spectrum from a pure blackbody.
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