This work has beensupported in part by NSF grant AST-0352912, NASA Origins
of Solar Systems grant NNX09AF62G, and NASA Astrobiology Institute grant NNA09DA81A
This publication
made use of the Mikulski Archive for Space Telescopes
(MAST). STScI is operated by the Association of Universities
for Research in Astronomy, Inc., under NASA contract NAS5-
26555. Support for MAST for non-HST data is provided by the
NASA Office of Space Science via grant NNX09AF08G and
by other grants and contracts
