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Paper: The Color of Noise in SuperWASP Data and the Implications for finding Extrasolar Planets
Volume: 366, Transiting Extrasolar Planets Workshop
Page: 152
Authors: Smith, A.M.S.; Collier Cameron, A.; Christian, D.J.; Clarkson, W.I.; Enoch, B.; Evans, A.; Haswell, C.A.; Hellier, C.; Horne, K.; Irwin, J.; Kane, S.R.; Lister, T.A.; Norton, A.J.; Parley, N.; Pollacco, D.L.; Ryans, R.; Skillen, I.; Street, R.A.; Triaud, A.H.M.J.; West, R.G.; Wheatley, P.J.; Wilsons, D.M.
Abstract: A recent study demonstrated that there is significant covariance structure in the noise on data from ground-based photometric surveys designed to detect transiting extrasolar planets. Such correlation in the noise has often been overlooked, especially when predicting the number of planets a particular survey is likely to find. Indeed, the shortfall in the number of transiting extrasolar planets discovered by such surveys seems to be explained by co-variance in the noise. We analyze SuperWASP (Wide Angle Search for Planets) data and determine that there is a significant amount of correlated systematic noise present. After modelling the potential planet catch, we conclude that this noise places a significant limit on the number of planets that SuperWASP is likely to detect; and that the best way to boost the signal-to-noise ratio and limit the impact of co-variant noise is to increase the number of observed transits for each candidate transiting planet.
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