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Instituto de Astronom\\'ia y F\\'isica del Espacio (IAFE). Buenos Aires, (6) Observatoire Astronomique de l'Universit\\'e de Gen\\`eve, 7), (7) Observatoire de Haute-Provence, 8) ((1) Aix Marseille Univ, (8) Institut d'Astrophysique de Paris, (9) Instituto de Astrof\\'isica e Ci\\^encias do Espa\\c{c}o, Aix Marseille Universit\\'e, Argentina, A. Santerne (1), B. Brugger (1), B. Courcol (1), CAUP, Chile, C. Moutou (1, CNES, CNRS, CNRS-UMR8028, Concepci\\'on, Coventry, Coventry CV4 7AL, Departamento de Astronom\\'ia, D. S\\'egransan (6), Faculdade de Ci\\^encias, Facultad de Ciencias Exactas y Naturales. Buenos Aires, F. Bouchy (6), F. Kiefer (8), F. Pepe (6), France, G. H\\'ebrard (8, G. Montagnier (8, Grenoble, Habitability, HI, I. Boisse (1), Institut Pyth\\'eas UMS 3470, IPAG, J. Rey (6), Kamuela, LAM, L.Arnold (7), L. Mignon (2), Marseille, M. Deleuil (1), M. J. Hobson (1), M. Stalport (6), N. Astudillo-Defru (3), N. Cabrera Salazar (2), N. C. Santos (9, N. Hara (6, Observatoire de Paris, O.Demangeon (9), O. Mousis (1), Paris, P. A. Wilson (13, Porto, Portugal, PSL, R. F. D\\'iaz (4, Saint-Michel-l'Observatoire, S. Borgniet (2), S. Dalal (8), S. Udry (6), Switzerland, T. Forveille (2), T. Lopez (1), UK, UK), UMR7095 CNRS, Universidade do Porto, Universit\\'e Pierre & Marie Curie, University of Warwick, UPMC, USA, V. Bourrier (6), Versoix, X.Bonfils (2), X. Delfosse (2), X. Dumusque (6)","submitted_at":"2019-02-15T22:37:03Z","abstract_excerpt":"We present the detection of a Warm Neptune orbiting the M-dwarf Gl378, using radial velocity measurements obtained with the SOPHIE spectrograph at the Observatoire de Haute-Provence. The star was observed in the context of the SOPHIE exoplanets consortium's subprogramme dedicated to finding planets around M-dwarfs. Gl378 is an M1 star, of solar metallicity, at a distance of 14.96 pc. 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