It has been claimed that Eddington's observations were of poor quality, and he had unjustly discounted simultaneous observations at Sobral, Brazil, which appeared closer to the Newtonian model, but a 1979 re-analysis with modern measuring equipment and contemporary software validated Eddington's results and conclusions.[12] The quality of the 1919 results was indeed poor compared to later observations, but was sufficient to persuade contemporary astronomers. The rejection of the results from the expedition to Brazil was due to a defect in the telescopes used which, again, was completely accepted and well understood by contemporary astronomers.[13]
12. Kennefick, Daniel (5 September 2007). "Not Only Because of Theory: Dyson, Eddington and the Competing Myths of the 1919 Eclipse Expedition". Studies in History and Philosophy of Science Part A. arXiv:0709.0685. Bibcode:2007arXiv0709.0685K. doi:10.1016/j.shpsa.2012.07.010. S2CID 119203172.
13. Kennefick, Daniel (1 March 2009). "Testing relativity from the 1919 eclipse – a question of bias". Physics Today. 62 (3): 37–42. Bibcode:2009PhT....62c..37K. doi:10.1063/1.3099578.