Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2010-08-24
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
Accepted to ApJ. Comments are most welcome. v2: added acknowledgments
Scientific paper
We present ground-based optical observations of the September 2009 and January 2010 transits of HD 80606b. Based on 3 partial light curves of the September 2009 event, we derive a midtransit time of T_c [HJD] = 2455099.196 +- 0.026, which is about 1 sigma away from the previously predicted time. We observed the January 2010 event from 9 different locations, with most phases of the transit being observed by at least 3 different teams. We determine a midtransit time of T_c [HJD] = 2455210.6502 +- 0.0064, which is within 1.3 sigma of the time derived from a Spitzer observation of the same event.
Adams Elisabeth
Barros S. C. C.
Bouchy Florent
Cabrera-Lavers Antonio
Cerutti S.
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