1. Department of Physics, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA
2. Department of Physics and Astronomy, Colby College, Waterville, ME 04901, USA
3. Max-Planck Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
4. Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, HI 96822, USA
5. LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, F-75014 Paris, France
6. Université Paris Denis Diderot, Université Paris Sorbonne Cité, F-75205 Paris Cedex 13, France
7. Jet Propulsion Laboratory, Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91011, USA
8. Spitzer Science Center, California Institute of Technology, M/S 220-6, 1200 E. California Blvd., Pasadena, CA 91125, USA