Eight occultation light curves of GJ 436b. The two upper plots are the data at 3.6 μm from 2008 January 30 and 2011 February 1. The following two were obtained with the 4.5 μm channel on 2008 February 2 and 2011 January 24. The fifth is the light curve at 5.8 μm from 2008 February 5. The last three were taken at 8 μm on 2007 June 30, 2008 June 11, and 13. The left plot displays the raw data, the middle one the corrected data, and the right one the residuals. The shaded green areas show the eclipse events.