GROUND-BASED MULTISITE OBSERVATIONS OF TWO TRANSITS OF HD 80606b

@article{Shporer2010GROUNDBASEDMO,
  title={GROUND-BASED MULTISITE OBSERVATIONS OF TWO TRANSITS OF HD 80606b},
  author={Avi Shporer and Joshua N. Winn and Stefan Dreizler and Knicole D. Col{\'o}n and W. Michael Wood-Vasey and Philip Choi and Caroline V. Morley and Claire Moutou and William F. Welsh and Don Pollaco and D. A. Starkey and Elisabeth R. Adams and Susana C. C. Barros and François Bouchy and Antonio Cabrera-Lavers and Stefano Cerutti and Louis Coban and Korena S. Costello and Hans J. Deeg and Rodrigo F. D{\'i}az and Gilbert A. Esquerdo and J. M. Fern{\'a}ndez and Scott W. Fleming and Eric B. Ford and Benjamin J. Fulton and Melanie Good and Guillaume H{\'e}brard and Matthew J. Holman and Matthew P. Hunt and S. Kadakia and Gary R. Lander and Matthew Lockhart and Tsevi Mazeh and Robert C. Morehead and Benjamin E. Nelson and Lisa Nortmann and Francisco Reyes and Eric Roebuck and Alexander R. Rudy and Ronald Ruth and Elaine Simpson and Chelsea L. M. Vincent and Gwendolyn M. Weaver and J.-W. Xie},
  journal={The Astrophysical Journal},
  year={2010},
  volume={722},
  pages={880 - 887}
}
We present ground-based optical observations of the 2009 September and 2010 January transits of HD 80606b. Based on three partial light curves of the 2009 September event, we derive a midtransit time of Tc [HJD] = 2455099.196 ± 0.026, which is about 1σ away from the previously predicted time. We observed the 2010 January event from nine different locations, with most phases of the transit being observed by at least three different teams. We determine a midtransit time of Tc [HJD] = 2455210.6502… 

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