Noise properties of the CoRoT data. A planet-finding perspective

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Noise properties of the CoRoT data. A planet-finding perspective

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dc.contributor.author Aigrain, Suzanne en_GB
dc.contributor.author Pont, F. en_GB
dc.contributor.author Fressin, F. en_GB
dc.contributor.author Alapini, Aude en_GB
dc.contributor.author Alonso, R. en_GB
dc.contributor.author Auvergne, M. en_GB
dc.contributor.author Barbieri, M. en_GB
dc.contributor.author Barge, P. en_GB
dc.contributor.author Bordé, P. en_GB
dc.contributor.author Bouchy, F. en_GB
dc.contributor.author Deeg, H. J. en_GB
dc.contributor.author De la Reza, R. en_GB
dc.contributor.author Deleuil, M. en_GB
dc.contributor.author Dvorak, R. en_GB
dc.contributor.author Erikson, A. en_GB
dc.contributor.author Fridlund, M. en_GB
dc.contributor.author Gondoin, P. en_GB
dc.contributor.author Guterman, P. en_GB
dc.contributor.author Jorda, L. en_GB
dc.contributor.author Lammer, H. en_GB
dc.contributor.author Léger, A. en_GB
dc.contributor.author Llebaria, A. en_GB
dc.contributor.author Magain, P. en_GB
dc.contributor.author Mazeh, T. en_GB
dc.contributor.author Moutou, C. en_GB
dc.contributor.author Ollivier, M. en_GB
dc.contributor.author Pätzold, M. en_GB
dc.contributor.author Queloz, D. en_GB
dc.contributor.author Rauer, H. en_GB
dc.contributor.author Rouan, D. en_GB
dc.contributor.author Schneider, J. en_GB
dc.contributor.author Wuchterl, G. en_GB
dc.contributor.author Zucker, S. en_GB
dc.date.accessioned 2009-11-27T12:26:37Z en_GB
dc.date.accessioned 2011-01-25T11:53:59Z en_US
dc.date.accessioned 2013-03-20T13:02:01Z
dc.date.issued 2009 en_GB
dc.description.abstract In 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.citation 506 (1), pp. 425-429 en_GB
dc.identifier.doi 10.1051/0004-6361/200911885 en_GB
dc.identifier.uri http://hdl.handle.net/10036/87033 en_GB
dc.language.iso en en_GB
dc.publisher EDP Sciences en_GB
dc.relation.url http://dx.doi.org/10.1051/0004-6361/200911885 en_GB
dc.subject data analysis methods en_GB
dc.subject photometric techniques en_GB
dc.subject planetary systems en_GB
dc.title Noise properties of the CoRoT data. A planet-finding perspective en_GB
dc.type Article en_GB
dc.date.available 2009-11-27T12:26:37Z en_GB
dc.date.available 2011-01-25T11:53:59Z en_US
dc.date.available 2013-03-20T13:02:01Z
dc.identifier.issn 0004-6361 en_GB
dc.identifier.issn 1432-0746 en_GB
dc.description Copyright © The European Southern Observatory (ESO) en_GB
dc.identifier.journal Astronomy and Astrophysics en_GB


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