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Table 4

Radial velocity observations along with activity indicator measurements FWHM, bisector, Hα of NGTS-26, and NGTS-27 from HARPS, FEROS, and CORALIE.

BJD −2 450 000 RV (km s−1) σRV (km s−1) FWHM(1) (km s−1) BIS(1) (km s−1) Hα(2) Instrument
NGTS-26

7974.570750 −28.445 0.040 7.412 −0.112 0.405 HARPS
7979.548685 −28.423 0.026 7.660 −0.132 0.338 HARPS
7980.536810 −28.344 0.016 7.507 0.023 0.426 HARPS
8614.763333 −28.310 0.016 7.432 −0.083 0.193 HARPS
8615.767157 −28.364 0.012 7.452 −0.011 0.278 HARPS
8637.712399 −28.330 0.015 7.397 −0.054 0.263 HARPS
8638.702809 −28.385 0.021 7.542 −0.078 0.294 HARPS
8641.650385 −28.337 0.018 7.490 0.001 0.240 HARPS
8666.597383 −28.353 0.017 7.509 0.034 0.330 HARPS
8667.583801 −28.353 0.011 7.417 −0.020 0.284 HARPS
8668.593329 −28.273 0.031 7.558 −0.125 0.460 HARPS
8884.843231 −28.308 0.027 7.402 −0.010 0.270 HARPS
8885.832470 −28.317 0.016 7.458 −0.027 0.223 HARPS
8887.842896 −28.377 0.016 7.516 −0.000 0.415 HARPS
8638.603809 −28.380 0.029 −0.062 FEROS
8640.635950 −28.324 0.018 −0.105 FEROS
8641.689492 −28.267 0.034 0.188 FEROS

NGTS-27

8612.730532 −22.960 0.014 8.112 0.008 0.282 HARPS
8614.708584 −22.902 0.012 8.134 0.030 0.323 HARPS
8616.730796 −22.880 0.008 8.024 0.012 0.274 HARPS
8617.715262 −22.856 0.013 8.020 0.009 0.262 HARPS
8642.678123 −22.966 0.007 8.088 0.028 0.249 HARPS
8644.627589 −22.834 0.007 8.141 0.013 0.244 HARPS
8591.570470 −22.957 0.011 0.071 FEROS
8593.870440 −22.798 0.016 0.014 FEROS
8594.809370 −22.924 0.012 0.044 FEROS
8597.604788 −22.807 0.017 0.068 FEROS
8599.625314 −22.872 0.013 0.077 FEROS
8599.845537 −22.815 0.014 0.086 FEROS
8638.713604 −22.932 0.014 0.033 FEROS
8643.760695 −22.865 0.014 0.067 FEROS
8562.681853 −22.926 0.076 8.893 0.225 0.218 CORALIE
8564.695404 −22.974 0.079 8.867 −0.240 0.238 CORALIE
8565.741653 −22.940 0.066 8.736 0.105 0.190 CORALIE
8567.696304 −22.990 0.078 8.956 0.056 0.189 CORALIE

Notes. (1)The uncertainties of FWHM and BIS are twice the uncertainties of the RVs (2σRV). (2)The median uncertainty of Hα is 0.02.

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