ASTRONOMY Correction for “Prevalence of Earth-size planets orbiting Sun-like stars,” by Erik A. Petigura, Andrew W. Howard, and Geoffrey W. Marcy, which appeared in issue 48, November 26, 2013, of Proc Natl Acad Sci USA (110:19273–19278; first published November 4, 2013; 10.1073/pnas.1319909110).
The authors note that the following statement should be added as a Note Added in Proof: “Estimates of the occurrence of Earth analog planets appear in several previous works including Catanzarite and Shao (25), Traub (26), and Dong and Zhu (27). These estimates, which range from 1% to 34%, were built upon early catalogs of Kepler planet candidates (based on less than 1.3 years of photometry). These estimates did not address survey completeness with injection and recovery or uncertain stellar radii with spectroscopy.” The online version has been updated to include the following three references:
References
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