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Fig. 1
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Expected SNR for a Proxima Cen b observation on a VLT as a function of contrast for different coronagraph transmissions at 2λ/D. We assumed a total optical transmission of 5% (excluding the corona-graph transmission), a Strehl ratio of 70%, and σdet = 6e− for a reduced pixel in 1h of exposure time (Lovis et al. 2017).
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