Preliminary results on HAT-P-4, TrES-3, XO-2, and GJ 436 from the NASA EPOXI mission

Abstract

EPOXI (EPOCh + DIXI) is a NASA Discovery Program Mission of Opportunity using the Deep Impact flyby spacecraft. The EPOCh (Extrasolar Planet Observation and Characterization) Science Investigation will gather photometric time series of known transiting exo-planet systems from January through August 2008. Here we describe the steps in the photometric extraction of the time series and present preliminary results of the first four EPOCh targets. © 2009 International Astronomical Union.