Abstract
What photometric precision is possible to achieve with a low budget instrument, from a place with moderate luminic contamination? Several nights of imaging stars with extrasolar planets discovered by radial velocities were acquired at the Observatorio UC for this work. We aim to compare different methods of reduction and differential photometry, in order to determine the highest photometric precision within reach of the Observatorio UC. We are looking for the optimal pipeline, as well as the limits for different possible targets. This will allow us to establish if the Observatory is capable of doing future observations of extrasolar planet transit candidates, as well as the magnitude, amplitude, and coordinate ranges of observable candidates.