Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20919604p&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #196.04; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
Differential photmetric observations of HD209458 obtained at the Steward 2.3 m Bok telescope during the transit and secondary eclipse of the known planet HD209458b are presented. The instrument used in the observations, PEPPER (a Polarization Encoding differential Photometer and PolarimetER) achieves near photon-noise limited differential photometric accuracies using a novel optical design. These observations were carried out through narrow band filters centered on the 770 nm potassium line and a continuum region centered at 800 nm. Using the normalized difference of the photometric measurements through these filters, accuracies of 3 parts in 10e5 were obtained in 20 minute observation intervals which was sufficient to observe the photometric signature of the HD209458b in both the transit and secondary eclipse events.
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