Short Cadence versus Long Cadence: Affects of Cadence Choice on Kepler Light Curve Analyses

Details Short Cadence versus Long Cadence: Affects of Cadence Choice on Kepler Light Curve Analyses Short Cadence versus Long Cadence: Affects of Cadence Choice on Kepler Light Curve Analyses

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.5903c&link_type=abstract

American Astronomical Society, DPS meeting #42, #59.03; Bulletin of the American Astronomical Society, Vol. 42, p.1084

Astronomy and Astrophysics

Astronomy

Scientific paper

Kepler light curves come in two flavors - long and short cadence - with effective integration times of 30 minutes and 1 minute respectively. Only a small number (up to 512) of the 150,000+ Kepler targets can be observed with the shorter cadence, and this number comprises both asteroseismology targets and planet candidate targets. Since the number of planet candidates now exceeds the number of available short cadence slots, it is necessary to determine for which candidates the short cadence light curves will be most useful. These light curves will have better time-sampling, but lower signal to noise due to the shorter integration time, and in addition may be more greatly affected by systematics than the long cadence light curves. The affect of the cadence choice on the derived planet parameters is presented here, with investigation into the possible dependences on parameters such as stellar magnitude, period and planet size.
Funding for this Discovery Mission is provided by NASA's Science Mission Directorate.

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