Left panel: 68% and 95% confidence level contours in the (α∥, α⊥) plane from the Lyα(Lyα) × Lyα(Lyα + Lyβ) auto-correlation function for the standard fit and for fits with polynomial broadband terms with and without additional priors, as described in the text. Right panel: contours for Lyα(Lyα) × Lyα(Lyα + Lyβ) auto-correlation standard fit and those from the combined fit of the auto-correlation and the quasar-Lyα cross-correlation of Blomqvist et al. (2019). In both panels the value for the Pl2015 model (Planck Collaboration XIII 2016) is shown as a black point.
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