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A high accuracy photometry algorithm is needed to take full advantage of thepotential of the transit method for the characterization of exoplanets,especially in deep crowded fields. It has to reduce to the lowest possiblelevel the negative influence of systematic effects on the photometric accuracy.It should also be able to cope with a high level of crowding and with largescale variations of the spatial resolution from one image to another. A recentdeconvolution-based photometry algorithm fulfills all these requirements, andit also increases the resolution of astronomical images, which is an importantadvantage for the detection of blends and the discrimination of false positivesin transit photometry. We made some changes to this algorithm in order tooptimize it for transit photometry and used it to reduce NTT/SUSI2 observationsof two transits of OGLE-TR-113b. This reduction has led to two very highprecision transit light curves with a low level of systematic residuals, usedtogether with former photometric and spectroscopic measurements to derive newstellar and planetary parameters in excellent agreement with previous ones, butsignificantly more precise.Comment: 8 pages, 4 figure

High accuracy transit photometry of the planet OGLE-TR-113b with a new deconvolution-based method