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Cort\\'es-Contreras, M. K\\\"urster, M. Lafarga, M. Lamp\\'on, M. L\\'opez-Puertas, M. R. Zapatero Osorio, M. Salz, M. Zechmeister, N. Casasayas-Barris, P. C. Schneider, P. J. Amado, S. Czesla, S. Dreizler, S. V. Jeffers, T. Henning, V. J. S. B\\'ejar, W. Seifert","submitted_at":"2018-12-06T10:52:34Z","abstract_excerpt":"We present three transit observations of HD 189733 b obtained with the high-resolution spectrograph CARMENES at Calar Alto. A strong absorption signal is detected in the near-infrared He I triplet at 10830 \\AA{} in all three transits. During mid-transit, the mean absorption level is $0.88\\pm0.04$ % measured in a $\\pm$10 km s$^{-1}$ range at a net blueshift of $-3.5\\pm0.4$ km s$^{-1}$ (10829.84--10830.57 \\AA{}). 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Kaminski, A. Quirrenbach, A. Reiners, A. S\\'anchez-L\\'opez, D. Montes, E. Nagel, E. Pall\\'e, E. W. Guenther, F. F. Bauer, F. J. Alonso-Floriano, F. Yan, G. Chen, I. A. G. Snellen, I. Ribas, J. A. Caballero, J. C. Morales, J. H. M. M. Schmitt, J. Sanz-Forcada, K. Molaverdikhani, L. M. Lara, L. Nortmann, M. Cort\\'es-Contreras, M. K\\\"urster, M. Lafarga, M. Lamp\\'on, M. L\\'opez-Puertas, M. R. Zapatero Osorio, M. Salz, M. Zechmeister, N. Casasayas-Barris, P. C. Schneider, P. J. Amado, S. Czesla, S. Dreizler, S. V. Jeffers, T. Henning, V. J. S. B\\'ejar, W. Seifert","submitted_at":"2018-12-06T10:52:34Z","abstract_excerpt":"We present three transit observations of HD 189733 b obtained with the high-resolution spectrograph CARMENES at Calar Alto. A strong absorption signal is detected in the near-infrared He I triplet at 10830 \\AA{} in all three transits. 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