Evolution of the 1 μm P Cygni feature over the first five days post merger from the unified spectral compilation (Sneppen et al. 2024a). The spectra were taken post merger plus 0.92 day (ANU, Andreoni et al. 2017), 1.17 day (SALT, Buckley et al. 2018), 1.47 day (SOAR and Gemini-south, Nicholl et al. 2017; Chornock et al. 2017) 1.43, 2.4, 3.4, and 4.4 day (X-shooter, Pian et al. 2017; Smartt et al. 2017). The spectra prior to one day contain no strong deviation from the black-body continuum (see also Shappee et al. 2017). However, between 0.92 and 1.17 days, strong absorption appears, while an emission feature begins to emerge with a delay of around ten hours after this (1.43–1.47 days). We note that these are the predicted emergence time framess for both absorption and emission for a feature produced by LTE Sr II due to a recombination wave passing through the ejecta (Sneppen et al. 2024b). We show in this analysis that this emergence is inconsistent with a He Iλ1083.0 nm interpretation of the feature.