dc.contributor.author | Zendejas Dominguez, J. | |
dc.contributor.author | Koppenhoefer, J. | |
dc.contributor.author | Saglia, R.P. | |
dc.contributor.author | Birkby, J. L. | |
dc.contributor.author | Hodgkin, S.T. | |
dc.contributor.author | Kovács, G. | |
dc.contributor.author | Pinfield, D.J. | |
dc.contributor.author | Sipocz, B. | |
dc.contributor.author | Barrado, D. | |
dc.contributor.author | Bender, R. | |
dc.contributor.author | Del Burgo, C. | |
dc.contributor.author | Cappetta, M. | |
dc.contributor.author | Martín, E. L. | |
dc.contributor.author | Nefs, S. V. | |
dc.contributor.author | Riffeser, A. | |
dc.contributor.author | Steele, P. | |
dc.date.accessioned | 2014-09-30T11:45:57Z | |
dc.date.available | 2014-09-30T11:45:57Z | |
dc.date.issued | 2013-12 | |
dc.identifier.citation | Zendejas Dominguez , J , Koppenhoefer , J , Saglia , R P , Birkby , J L , Hodgkin , S T , Kovács , G , Pinfield , D J , Sipocz , B , Barrado , D , Bender , R , Del Burgo , C , Cappetta , M , Martín , E L , Nefs , S V , Riffeser , A & Steele , P 2013 , ' Searching for transits in the Wide Field Camera Transit Survey with difference-imaging light curves ' , Astronomy and Astrophysics , vol. 560 , A92 . https://doi.org/10.1051/0004-6361/201321317 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.uri | http://hdl.handle.net/2299/14504 | |
dc.description.abstract | The Wide Field Camera Transit Survey is a pioneer program aiming at for searching extra-solar planets in the near-infrared. The images from the survey are processed by a data reduction pipeline, which uses aperture photometry to construct the light curves. We produce an alternative set of light curves using the difference-imaging method for the most complete field in the survey and carry out a quantitative comparison between the photometric precision achieved with both methods. The results show that differencephotometry light curves present an important improvement for stars with J > 16. We report an implementation on the box-fitting transit detection algorithm, which performs a trapezoid-fit to the folded light curve, providing more accurate results than the boxfitting model. We describe and optimize a set of selection criteria to search for transit candidates, including the V-shape parameter calculated by our detection algorithm. The optimized selection criteria are applied to the aperture photometry and difference-imaging light curves, resulting in the automatic detection of the best 200 transit candidates from a sample of ~475 000 sources. We carry out a detailed analysis in the 18 best detections and classify them as transiting planet and eclipsing binary candidates. We present one planet candidate orbiting a late G-type star. No planet candidate around M-stars has been found, confirming the null detection hypothesis and upper limits on the occurrence rate of short-period giant planets around M-dwarfs presented in a prior study. We extend the search for transiting planets to stars with J ≤ 18, which enables us to set a stricter upper limit of 1.1%. Furthermore, we present the detection of five faint extremely-short period eclipsing binaries and three M-dwarf/M-dwarf binary candidates. The detections demonstrate the benefits of using the difference-imaging light curves, especially when going to fainter magnitudes. | en |
dc.format.extent | 19 | |
dc.format.extent | 10941080 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy and Astrophysics | |
dc.subject | Methods: data analysis | |
dc.subject | Planets and satellites: detection | |
dc.subject | Techniques: photometric | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | Searching for transits in the Wide Field Camera Transit Survey with difference-imaging light curves | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/201321317 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |