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dc.contributor.authorAigrain, Suzanneen_GB
dc.contributor.authorPont, F.en_GB
dc.contributor.authorFressin, F.en_GB
dc.contributor.authorAlapini, Audeen_GB
dc.contributor.authorAlonso, R.en_GB
dc.contributor.authorAuvergne, M.en_GB
dc.contributor.authorBarbieri, M.en_GB
dc.contributor.authorBarge, P.en_GB
dc.contributor.authorBordé, P.en_GB
dc.contributor.authorBouchy, F.en_GB
dc.contributor.authorDeeg, H. J.en_GB
dc.contributor.authorDe la Reza, R.en_GB
dc.contributor.authorDeleuil, M.en_GB
dc.contributor.authorDvorak, R.en_GB
dc.contributor.authorErikson, A.en_GB
dc.contributor.authorFridlund, M.en_GB
dc.contributor.authorGondoin, P.en_GB
dc.contributor.authorGuterman, P.en_GB
dc.contributor.authorJorda, L.en_GB
dc.contributor.authorLammer, H.en_GB
dc.contributor.authorLéger, A.en_GB
dc.contributor.authorLlebaria, A.en_GB
dc.contributor.authorMagain, P.en_GB
dc.contributor.authorMazeh, T.en_GB
dc.contributor.authorMoutou, C.en_GB
dc.contributor.authorOllivier, M.en_GB
dc.contributor.authorPätzold, M.en_GB
dc.contributor.authorQueloz, D.en_GB
dc.contributor.authorRauer, H.en_GB
dc.contributor.authorRouan, D.en_GB
dc.contributor.authorSchneider, J.en_GB
dc.contributor.authorWuchterl, G.en_GB
dc.contributor.authorZucker, S.en_GB
dc.date.accessioned2009-11-27T12:26:37Zen_GB
dc.date.accessioned2011-01-25T11:53:59Zen_GB
dc.date.accessioned2013-03-20T13:02:01Z
dc.date.issued2009-04-16en_GB
dc.description.abstractIn this short paper, we study the photometric precision of stellar light curves obtained by the CoRoT satellite in its planet-finding channel, with a particular emphasis on the time scales characteristic of planetary transits. Together with other articles in the same issue of this journal, it forms an attempt to provide the building blocks for a statistical interpretation of the CoRoT planet and eclipsing binary catch to date. After pre-processing the light curves so as to minimise long-term variations and outliers, we measure the scatter of the light curves in the first three CoRoT runs lasting more than 1 month, using an iterative non-linear filter to isolate signal on the time scales of interest. The behaviour of the noise on 2 h time scales is described well by a power-law with index 0.25 in R-magnitude, ranging from 0.1 mmag at R=11.5 to 1 mmag at R=16, which is close to the pre-launch specification, though still a factor 2-3 above the photon noise due to residual jitter noise and hot pixel events. There is evidence of slight degradation in the performance over time. We find clear evidence of enhanced variability on hour time scales (at the level of 0.5 mmag) in stars identified as likely giants from their R magnitude and B-V colour, which represent approximately 60 and 20% of the observed population in the directions of Aquila and Monoceros, respectively. On the other hand, median correlated noise levels over 2 h for dwarf stars are extremely low, reaching 0.05 mmag at the bright end.en_GB
dc.identifier.citationVol. 506 (1), pp. 425-429en_GB
dc.identifier.doi10.1051/0004-6361/200911885en_GB
dc.identifier.urihttp://hdl.handle.net/10036/87033en_GB
dc.language.isoenen_GB
dc.publisherEDP Sciencesen_GB
dc.subjectdata analysis methodsen_GB
dc.subjectphotometric techniquesen_GB
dc.subjectplanetary systemsen_GB
dc.titleNoise properties of the CoRoT data. A planet-finding perspectiveen_GB
dc.typeArticleen_GB
dc.date.available2009-11-27T12:26:37Zen_GB
dc.date.available2011-01-25T11:53:59Zen_GB
dc.date.available2013-03-20T13:02:01Z
dc.identifier.issn0004-6361en_GB
dc.identifier.issn1432-0746en_GB
dc.descriptionCopyright © The European Southern Observatory (ESO)en_GB
dc.identifier.journalAstronomy and Astrophysicsen_GB


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