1. Department of Physics, University of California, Davis, 1 Shields Avenue, Davis CA 95616, USA
2. Aix Marseille Univ, CNRS, LAM, Laboratoire d’Astrophysique de Marseille, F-13013 Marseille, France
3. Max-Planck Institut für Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany
4. Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
5. National Center for Supercomputing Applications, University of Illinois, 1205 West Clark St, Urbana, IL 61801, USA
6. Department of Physics and Astronomy, Colby College, Waterville, ME 04961, USA
7. Centre de Recherche Astrophysique de Lyon UMR5574, Univ Lyon, Univ Lyon1, Ens de Lyon, CNRS, F-69230 Saint-Genis-Laval, France
8. Spitzer Science Centre, California Institute of Technology, M/S 220-6, 1200 E. California Blvd., Pasadena, CA 91125, USA