RATS-Kepler -- a deep high cadence survey of the Kepler field

Abstract

We outline the purpose, strategy and first results of a deep, high cadence, photometric survey of the Kepler field using the Isaac Newton Telescope on La Palma and the MDM 1.3m Telescope on Kitt Peak. Our goal was to identify sources located in the Kepler field of view which are variable on a timescale of a few mins to 1 hour. The astrophysically most interesting sources would then have been candidates for observation using Kepler using 1 min sampling. Our survey covered ~42% of the Kepler field of view and we have obtained light curves for 7.1x10^5 objects in the range 13<g<20. We have discovered more than 100 variable sources which have passed our two stage identification process. As a service to the wider community, we make our data products and cleaned CCD images available to download. We obtained Kepler data of 18 sources which we found to be variable using our survey and we give an overview of the currently available data here. These sources include a pulsating DA white dwarf, eleven delta Sct stars which have dominant pulsation periods in the range 24 min to 2.35 hrs, three contact binaries, and a cataclysmic variable (V363 Lyr). One of the delta Sct stars is in a contact binary.

Accepted by MNRAS

References in corpus (7)

• KIC 4544587: an Eccentric, Short Period Binary System with delta Sct Pulsations and Tidally Excited Modes
• Deep MMT Transit Survey of the Open Cluster M37 II: Variable Stars
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• Short duration high amplitude flares detected on the M dwarf star KIC 5474065
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Cited by in corpus (16)

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• Probing the structure of Kepler ZZ Ceti stars with full evolutionary models-based asteroseismology
• The OmegaWhite Survey for short period variable stars II: An overview of results from the first four years
• The search for ZZ Ceti stars in the original Kepler mission
• New Insights into Time Series Analysis II -- No Correlated Observations
• A double-modulation effect detected in a double-mode high-amplitude $\delta$ Scuti star: KIC 10284901
• Minute-Cadence Observations of the LAMOST Fields with the TMTS: II. Catalogues of Short-Period Variable Stars from the First Two-Year Surveys
• The OmegaWhite survey for Short-Period Variable Stars III: Follow-up Photometric and Spectroscopic Observations
• KIC 10975348: A double-mode or triple-mode high-amplitude $\delta$ Scuti star?
• BOKS 45906: a CV with an orbital period of 56.6 min in the Kepler field?
• Variability search in M 31 using Principal Component Analysis and the Hubble Source Catalog
• Red giant pulsations from the suspected symbiotic star StHA 169 detected in Kepler data
• Characteristics of Kepler Eclipsing Binaries Displaying a Significant O'Connell Effect