We present the motivations for and methods we used to create a new ground-based photometric survey of the field targeted by the NASA Kepler Mission. The survey contains magnitudes for 4,416,007 sources in one or more of the UBV filters, including 1,861,126 sources detected in all three filters. The typical completeness limit is U ̃ 18.7, B ̃ 19.3, and V ̃ 19.1 mag, but varies by location. The area covered is 191 deg2 and includes the areas on and between the 42 Kepler CCDs, as well as additional areas around the perimeter of the Kepler field. The major significance of this survey is our addition of U to the optical bandpass coverage available in the Kepler Input Catalog, which was primarily limited to the redder SDSS griz and D51 filters. The U coverage reveals a sample of the hottest sources in the field, many of which are not currently targeted by Kepler, but may be objects of astrophysical interest.
Publications of the Astronomical Society of the Pacific
- Pub Date:
- April 2012
- Astrophysics - Solar and Stellar Astrophysics
- 19 pages, 6 figures, in press at PASP A slightly-revised version of previous upload. A few changes to the text now more closely reflect the published manuscript. URLs for downloading data are included