tokens: M.R.M. and A.M.G. are supported by NSF grants AST-0909218 and AST-1412615. A.M.G. is also supported by the Lauren Leichtman Arthur Levine Chair in Astrophysics. This work is based on observations made with the NASA/ESA Hubble Space Telescope , obtained the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs 11671, 12667, 12318, and 14613. We thank the anonymous referee for their thorough reading and insightful comments, which improved the content and presentation of this paper. Facility: HST (WFC3-IR). Software: Astropy (The Astropy Collaboration et al. 2013 ), IPython (Pérez Granger 2007 ), Matplotlib (Hunter 2007 ), NumPy (Oliphant 2007 ; van der Walt et al. 2011 ), SciPy (Jones et al. 2001 ; Oliphant 2007 ; Millman Aivazis 2011 ), MultiNest (Feroz et al. 2009 ), PyMultiNest (Buchner et al. 2014 ).
ner_tags: B-Person O B-Person O O O B-Organization B-Grant I-Grant O B-Grant B-Person O O O O O B-Fellowship I-Fellowship I-Fellowship I-Fellowship I-Fellowship I-Fellowship I-Fellowship O O O O O O O O O B-Organization B-Telescope I-Telescope I-Telescope O O O B-Archive I-Archive I-Archive I-Archive I-Archive O O B-Organization I-Organization I-Organization I-Organization O O O O O B-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization I-Organization O B-Organization B-Grant I-Grant I-Grant O O O O O B-Grant I-Grant B-Grant B-Grant O B-Grant O O O O O O O O O O O O O O O O O O O O O O B-Telescope B-Instrument O B-Software B-Citation I-Citation I-Citation I-Citation I-Citation I-Citation O B-Software B-Citation I-Citation I-Citation O B-Software B-Citation I-Citation O B-Software B-Citation I-Citation O B-Citation I-Citation I-Citation I-Citation I-Citation I-Citation O B-Software B-Citation I-Citation I-Citation I-Citation O B-Citation I-Citation O B-Citation I-Citation I-Citation O B-Software B-Citation I-Citation I-Citation I-Citation O B-Software B-Citation I-Citation I-Citation I-Citation O