Ground-based Observations Relating to the Kepler Space Mission in Search of Terrestrial Planets around G-dwarf Stars.

Astronomy and Astrophysics – Astronomy

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Scientific paper

We observed at the Vatican Advanced Technology Telescope (VATT, 1.8-meter) on Mt. Graham, Arizona, several 6-arcmin fields in Cygnus with the intermediate-band 7-filter Stromvil system. This system is capable of classifying all the types of stars even in the case of dust-reddening. We process the CCD stellar images by using our CommandLog, an organized method using IRAF and customized scripts to attend to the steps for optimizing the flatfield calibration to extracting precise photometry by applying iterative and error-minimalizing techniques.
The Kepler Space Mission will observe for months unflinchingly G-dwarf stars in its 140 square degree field in Cygnus to detect orbiting terrestrial planets. But the mission depends on receiving targets known from ground-based observations to be non-variable G-dwarf stars. Our existing and future ground-based VATT observations in Cygnus covering the 12th to 15th magnitude range appropriate for Kepler offer data for participation in the Kepler Guest Investigator Program (see Borucki et al. session 33.05). We would like to thank J. Arratia, Director of the Model Institutions for Excellence program funded by the National Science Foundation at Universidad Metropolitana for its support for these observations.

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