On April and March of 2005, we developed a monitoring campaign for a serie of OGLE stars, 
candidates to present transits due to extrasolar planets. The observations were obtained 
with the infrared camera SOFI@NTT, through the Ks filter (center at 2162 nm and width of 275 
nm), acquiring more than 3 hours of observations for over 10 OGLE stars.

We present the results for OGLE-TR-113 and the IR transit curve for this candidate. With the 
information derived from the IR observations, we calculated a size for the dimmer companion, 
obtaining a planetary size. This result allows us to confirm OGLE-TR-113b as a "Hot 
Jupiter".