Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 422, Issue 1, Pages 665-671Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2012.20644.x
Keywords
asteroseismology; methods: data analysis; methods: observational; techniques: photometric; stars: activity; stars: oscillations
Categories
Funding
- STFC
- STFC [ST/I50563X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/I50563X/1] Funding Source: researchfish
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A close comparison of Kepler short- and long-cadence data released prior to 2011 November 1 has shown some subtle differences that make the short-cadence data superior to their long-cadence counterparts. The inevitable results of a faster sampling rate are present: the short-cadence data provide greater time resolution for short-lived events like flares, and have a much higher Nyquist frequency than the long-cadence data; however, they also contain fewer high-amplitude peaks at low frequency and allow a more precise determination of pulsation frequencies, amplitudes and phases. The latter observation indicates that Kepler data are not normally distributed. Moreover, a close inspection of the Pre-search Data Conditioned long-cadence data shows residuals that have increased noise on time-scales important to asteroseismology, but unimportant to planet searches.
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