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26 April 2024

» arxiv » 0708.0785

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SuperWASP-North Extra-solar Planet Candidates between 3hr < RA < 6hr
W. I. Clarkson ; B. Enoch ; C. A. Haswell ; A. J. Norton ; D. J. Christian ; A. Collier Cameron ; S. R. Kane ; K. D. Horne ; T. A. Lister ; R. A. Street ; R. G. West ; D. M. Wilson ; N. Evans ; A. Fitzsimmons ; C. Hellier ; S. T.Hodgkin ; J. Irwin ; F. P. Keenan ; J. P. Osborne ; N. R. Parley ; D. L. Pollacco ; R. Ryans ; I.Skillen ; P. J. Wheatley ;
Date:	6 Aug 2007
Abstract:	The Wide Angle Search for Planets (WASP) photometrically surveys a large number of nearby stars to uncover candidate extrasolar planet systems by virtue of small-amplitude lightcurve dips on a < 5-day timescale typical of the ``Hot-Jupiters.’’ Observations with the SuperWASP-North instrument between April and September 2004 produced a rich photometric dataset of some 1.3 billion datapoints from 6.7 million stars. Our custom-built data acquisition and processing system produces ~0.02 mag photometric precision at V=13. We present the transit-candidates in the 03h-06h RA range. Of 141,895 lightcurves with sufficient sampling to provide adequate coverage, 2688 show statistically significant transit-like periodicities. Of these, 44 pass visual inspection of the lightcurve, of which 24 are removed through a set of cuts on the statistical significance of artefacts. All but 4 of the remaining 20 objects are removed when prior information at higher spatial-resolution from existing catalogues is taken into account. Of the four candidates remaining, one is considered a good candidate for follow-up observations with three further second-priority targets. We provide detailed information on these candidates, as well as a selection of the false-positives and astrophysical false-alarms that were eliminated, and discuss briefly the impact of sampling on our results.
Source:	arXiv, 0708.0785
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