Fig. 3.
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Spectral series of the kilonova AT2017gfo. The best-fit blackbodies are overlaid. The temporal span here covers the photospheric epochs (i.e. spectra up to 5.4 days post-merger), where a blackbody model approximates the continuum well. The blackbody temperatures and the spectral features are listed in Table 1 and in Sect. 5, respectively.
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