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Table 3.

Orbital parameters of the two-planet system GJ 253 derived from DRS and SERVAL-NZP data.

DRS data fit
SERVAL-NZP data fit
Parameter GJ 253 b GJ 253 c GJ 253 b GJ 253 c
P [d] 14.073 95.889 14.071 95.870
K [m s−1] 4.14 2.55 3.77 2.65
e 0.087 0.258 0.081 0.232
ω [deg] 118.6 217.5 151.7 200.9
M0 [deg] 234.8 254.6 190.8 269.6
a [au] 0.10806 0.38838 0.10805 0.38833
m sin i [Mjup] 0.0439 0.0498 0.0400 0.0521
γHARPS-pre [m s−1] 39977.20 −0.23
γHARPS-pre [m s−1] 39991.06 0.41
σHARPS-pre [m s−1] 1.77 1.46
σHARPS-pre [m s−1] 0.90 0.37

wrms [m s−1] 1.79 1.67
−lnℒ 454.00 437.544
Δlnℒ 180.00 185.99

Notes. All orbital elements are Jacobi orbital elements and are valid for the first HARPS observational epoch, which is BJD = 2 452 984.733.

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