1. Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USA
2. Department of Physics and Astronomy, University of Texas Rio Grande Valley , Brownsville, TX 78520 , USA
3. Department of Physics, University of Alberta , CCIS 4-183, Edmonton, AB T6G 2E1 , Canada
4. Department of Astronomy, Indiana University , 727 E. Third Street, Bloomington, IN 47405 , USA
5. Space Telescope Science Institute , 3800 San Martin Drive, Baltimore, MD 21218 , USA
6. Dana Canada Corporation , 656 Kerr Street, Oakville, ON L6K 3E4 , Canada