Initial characteristics of kepler short cadence data

Ronald Lynn Gilliland, Jon M. Jenkins, William J. Borucki, Stephen T. Bryson, Douglas A. Caldwell, Bruce D. Clarke, Jessie L. Dotson, Michael R. Haas, Jennifer Hall, Todd Klaus, David Koch, Sean McCauliff, Elisa V. Quintana, Joseph D. Twicken, Jeffrey E. Van Cleve

Research output: Contribution to journalArticle

229 Citations (Scopus)

Abstract

The Kepler Mission offers two options for observations - either long cadence (LC) used for the bulk of core mission science, or short cadence (SC) which is used for applications such as asteroseismology of solar-like stars and transit timing measurements of exoplanets where the 1minute sampling is critical. We discuss the characteristics of SC data obtained in the 33.5 day long Quarter 1 observations with Kepler which completed on 2009 June 15. The truly excellent time series precisions are nearly Poisson limited at 11th magnitude providing per-point measurement errors of 200 parts-per-million per minute. For extremely saturated stars near seventh magnitude precisions of 40ppm are reached, while for background limited measurements at 17th magnitude precisions of 7 mmag are maintained. We note the presence of two additive artifacts, one that generates regularly spaced peaks in frequency, and one that involves additive offsets in the time domain inversely proportional to stellar brightness. The difference between LC and SC sampling is illustrated for transit observations of TrES-2.

Original languageEnglish (US)
JournalAstrophysical Journal Letters
Volume713
Issue number2 PART 2
DOIs
StatePublished - Jan 1 2010

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transit
sampling
Kepler mission
asteroseismology
stars
extrasolar planets
artifact
artifacts
brightness
time measurement
time series
science

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Gilliland, R. L., Jenkins, J. M., Borucki, W. J., Bryson, S. T., Caldwell, D. A., Clarke, B. D., ... Van Cleve, J. E. (2010). Initial characteristics of kepler short cadence data. Astrophysical Journal Letters, 713(2 PART 2). https://doi.org/10.1088/2041-8205/713/2/L160
Gilliland, Ronald Lynn ; Jenkins, Jon M. ; Borucki, William J. ; Bryson, Stephen T. ; Caldwell, Douglas A. ; Clarke, Bruce D. ; Dotson, Jessie L. ; Haas, Michael R. ; Hall, Jennifer ; Klaus, Todd ; Koch, David ; McCauliff, Sean ; Quintana, Elisa V. ; Twicken, Joseph D. ; Van Cleve, Jeffrey E. / Initial characteristics of kepler short cadence data. In: Astrophysical Journal Letters. 2010 ; Vol. 713, No. 2 PART 2.
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Gilliland, RL, Jenkins, JM, Borucki, WJ, Bryson, ST, Caldwell, DA, Clarke, BD, Dotson, JL, Haas, MR, Hall, J, Klaus, T, Koch, D, McCauliff, S, Quintana, EV, Twicken, JD & Van Cleve, JE 2010, 'Initial characteristics of kepler short cadence data', Astrophysical Journal Letters, vol. 713, no. 2 PART 2. https://doi.org/10.1088/2041-8205/713/2/L160

Initial characteristics of kepler short cadence data. / Gilliland, Ronald Lynn; Jenkins, Jon M.; Borucki, William J.; Bryson, Stephen T.; Caldwell, Douglas A.; Clarke, Bruce D.; Dotson, Jessie L.; Haas, Michael R.; Hall, Jennifer; Klaus, Todd; Koch, David; McCauliff, Sean; Quintana, Elisa V.; Twicken, Joseph D.; Van Cleve, Jeffrey E.

In: Astrophysical Journal Letters, Vol. 713, No. 2 PART 2, 01.01.2010.

Research output: Contribution to journalArticle

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AU - Gilliland, Ronald Lynn

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AU - Dotson, Jessie L.

AU - Haas, Michael R.

AU - Hall, Jennifer

AU - Klaus, Todd

AU - Koch, David

AU - McCauliff, Sean

AU - Quintana, Elisa V.

AU - Twicken, Joseph D.

AU - Van Cleve, Jeffrey E.

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Gilliland RL, Jenkins JM, Borucki WJ, Bryson ST, Caldwell DA, Clarke BD et al. Initial characteristics of kepler short cadence data. Astrophysical Journal Letters. 2010 Jan 1;713(2 PART 2). https://doi.org/10.1088/2041-8205/713/2/L160