SpiKeS: Precision Warm Spitzer Photometry of the Kepler Field

Creators: Werner, Michael W.; Gorjian, Varoujan; Morales, Farisa Y.; Livingston, John H.; Kennedy, Grant M.; Akeson, Rachel L.; Beichman, Charles; Ciardi, David R.; Furlan, Elise; Lowrance, Patrick J.; Mamajek, Eric E.; Plavchan, Peter; Stark, Christopher C.; Wyatt, Mark C.

Abstract

The ~200,000 targets monitored for photometric variability during the Kepler prime mission include the best-studied group of stars in the sky, due both to the extensive time history provided by Kepler and to the substantial amount of ancillary data provided by other investigators or compiled by the Kepler team. To complement this wealth of data, we surveyed the entire Kepler field using the 3.6 and 4.5 μm bands of the Warm Spitzer Space Telescope, obtaining photometry in both bands for almost 170,000 objects. We demonstrate relative photometric precision ranging from better than ~1.5% for the brighter stars down to slightly greater than ~2% for the faintest stars monitored by Kepler. We describe the data collection and analysis phases of this work and identify several stars with large infrared excess, although none that is also known to be the host of an exoplanetary system. The final catalog resulting from this work will be available at the NASA Exoplanet Archive.

Additional Information

© 2021. The American Astronomical Society. Received 2020 October 12; revised 2021 February 18; accepted 2021 February 19; published 2021 April 27. We thank Sean Carey of the SSC for extensive discussions of the systematic effects in the IRAC data and Bob Benjamin for introducing us to red clump giants. We also thank Erik Petigura for discussions of the applicability of the work of Fulton & Petigura (2018) to the SpiKeS data. We thank the anonymous referee for very helpful comments and suggestions which improved the paper. We thank Justin Beaurone for assistance with producing Table 3. We also thank the ever-helpful staff of the SSC for helping us to develop the protocols under which the AORs for each tile of the complete survey could be submitted. G.M.K. is supported by the Royal Society as a Royal Society University Research Fellow. The research was carried out at the Jet Propulsion Laboratory - , California Institute of Technology (JPL/Caltech) - , under a contract with the National Aeronautics and Space Administration (80NM0018D0004). This work is based in part on observations made with the Spitzer Space Telescope - , which was operated by JPL/Caltech - , under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. This publication also makes use of data products from WISE - , which is a joint project of the University of California - , Los Angeles - , and JPL/Caltech - , funded by NASA. This work has made use of data from the European Space Agency mission Gaia (https://www.cosmos.esa.int/gaia) - , processed by the Gaia Data Processing and Analysis Consortium (DPAC - , https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. - Software: Astropy (Astropy Collaboration et al. 2013, 2018), TOPCAT (Taylor 2005), SExtractor (Bertin & Arnouts 1996).

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