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at the end of the abstract :
From data up to and including pericentre, we robustly detect the combined gravitational redshift and relativistic transverse Doppler effect for S2 of z = Δλ / λ ≈ 200 km s−1/c with different statistical analysis methods. When parameterising the post-Newtonian contribution from these effects by a factor f , with f = 0 and f = 1 corresponding to the Newtonian and general relativistic limits, respectively, we find from posterior fitting with different weighting schemes f = 0.90 ± 0.09|stat ± 0.15|sys. The S2 data are inconsistent with pure Newtonian dynamics.
And are consistent with GR... Others analysts with the same credibility point on deviations with GR in the Event Horizon Telescope measurements ( shadow angular radius, funnel region crescent ). What this 26 years data analysis shows exactly in regard of alternate GR like theories ?
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