Precise time series photometry for the Kepler-2.0 mission
Precise time series photometry for the Kepler-2.0 mission
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Kepler-2.0 任务的精确时间序列光度测量
DOI:
10.1093/mnras/stu2638
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发表时间:
2015
影响因子:
4.8
通讯作者:
Aigrain S
中科院分区:
文献类型:
--
作者:
Aigrain S
The recently approved NASAK2mission has the potential to multiply by an order of magnitude the number of short-period transiting planets found byKepleraround bright and low-mass stars, and to revolutionize our understanding of stellar variability in open clusters. However, the data processing is made more challenging by the reduced pointing accuracy of the satellite, which has only two functioning reaction wheels. We present a new method to extract precise light curves fromK2data, combining list-driven, soft-edged aperture photometry with a star-by-star correction of systematic effects associated with the drift in the roll angle of the satellite about its boresight. The systematics are modelled simultaneously with the stars’ intrinsic variability using a semiparametric Gaussian process model. We test this method on a week of data collected during an engineering test in 2014 January, perform checks to verify that our method does not alter intrinsic variability signals, and compute the precision as a function of magnitude on long-cadence (30 min) and planetary transit (2.5 h) time-scales. In both cases, we reach photometric precisions close to the precision reached during the nominalKeplermission for stars fainter than 12th magnitude, and between 40 and 80 parts per million for brighter stars. These results confirm the bright prospects for planet detection and characterization, asteroseismology and stellar variability studies withK2. Finally, we perform a basic transit search on the light curves, detecting two bona fide transit-like events, seven detached eclipsing binaries and 13 classical variables.
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DOI:
10.1111/j.1365-2966.2004.07657.x
发表时间:
2004
影响因子:
4.8
作者:
S. Aigrain;M. Irwin
通讯作者:
M. Irwin
影响因子:
3.5
作者:
Christiansen, Jessie L.;Jenkins, Jon M.;Van Cleve, Jeffrey
通讯作者:
Van Cleve, Jeffrey
影响因子:
4.9
作者:
Borucki, William J.;Koch, David G.;Still, Martin
通讯作者:
Still, Martin
影响因子:
8.7
作者:
Batalha, Natalie M.;Rowe, Jason F.;Welsh, William F.
通讯作者:
Welsh, William F.
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
R. Poleski;P. McCullough;J. Valenti;C. Burke;P. Machálek;K. Janes
通讯作者:
K. Janes