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Berta-Thompson","submitted_at":"2018-06-11T09:21:33Z","abstract_excerpt":"GJ1132 is a nearby red dwarf known to host a transiting Earth-size planet. After its initial detection, we pursued an intense follow-up with the HARPS velocimeter. We now confirm the detection of GJ1132b with radial velocities only. We refined its orbital parameters and, in particular, its mass ($m_b = 1.66\\pm0.23 M_\\oplus$), density ($\\rho_b = 6.3\\pm1.3$ g.cm$^{-3}$) and eccentricity ($e_b < 0.22 $; 95\\%). We also detect at least one more planet in the system. GJ1132c is a super-Earth with period $P_c = 8.93\\pm0.01$ days and minimum mass $m_c \\sin i_c = 2.64\\pm0.44~M_\\oplus$. 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