Detecting Proxima b's atmosphere with JWST targeting CO2 at 15 μm using a high-pass spectral filtering technique by Snellen, IAG, Désert, J-M, Waters, LBFM, Robinson, T, Meadows, V, van Dishoeck, EF, Brand l, BR, Henning, T, Bouwman, J, Lahuis, F, Min, M, Lovis, C, Dominik, C, Van Eylen, V, Sing, D, Anglada-Escudé, G, Birkby, JL, Brogi, M