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Draft version March 10, 2010 Preprint typeset using LATEX style emulateapj v. 04/20/08
 

Summary: Draft version March 10, 2010
Preprint typeset using LATEX style emulateapj v. 04/20/08
THE WEATHER PATTERNS OF EXTRASOLAR PLANET HD 189733B FROM A DOZEN TRANSITS AND
ECLIPSES MEASURED WITH SPITZER
Eric Agol1,2
, Nicolas B. Cowan1
, Heather A. Knutson3
, Drake L. Deming4
, Jason H. Steffen5
, Gregory W.
Henry6
, and David Charbonneau7
Draft version March 10, 2010
ABSTRACT
We present observations of six transits and six eclipses of the transiting planet system HD 189733
taken with the Spitzer Space Telescope IRAC camera at 8 microns, as well as a re-analysis of previously
published data. We use several novel techniques in our data analysis, the most important of which is
a new correction for the detector "ramp" variation with a double-exponential function which performs
much better and is a better physical model for this detector variation. Our main scientific findings are:
(1) an upper limit on the variability of the day-side planet flux of 2.7% (68% confidence); (2) the most

  

Source: Ahlers, Guenter - Department of Physics, University of California at Santa Barbara

 

Collections: Physics