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We report the results of the high precision photometric follow-upobservations of five transiting hot jupiters - WASP-33b, WASP-50b, WASP-12b,HATS-18b and HAT-P-36b. The observations are made from the 2m Himalayan ChandraTelescope at Indian Astronomical Observatory, Hanle and the 1.3m J. C.Bhattacharyya Telescope at Vainu Bappu Observatory, Kavalur. This exercise is apart of the capability testing of the two telescopes and their back-endinstruments. Leveraging the large aperture of both the telescopes used, theimages taken during several nights were used to produce the transit lightcurves with high photometric S/N ($>200$) by performing differentialphotometry. In order to reduce the fluctuations in the transit light curves dueto various sources such as stellar activity, varying sky transparency etc. wepreprocessed them using wavelet denoising and applied Gaussian processcorrelated noise modeling technique while modeling the transit light curves. Todemonstrate the efficiency of the wavelet denoising process we have alsoincluded the results without the denoising process. A state-of-the-artalgorithm used for modeling the transit light curves provided the physicalparameters of the planets with more precise values than reported earlier.

Precise photometric transit follow-up observations of five close-in exoplanets : update on their physical properties