L
Lewis C. Roberts
Researcher at Jet Propulsion Laboratory
Publications - 30
Citations - 566
Lewis C. Roberts is an academic researcher from Jet Propulsion Laboratory. The author has contributed to research in topics: Adaptive optics & Coronagraph. The author has an hindex of 11, co-authored 30 publications receiving 548 citations. Previous affiliations of Lewis C. Roberts include California Institute of Technology & Embry–Riddle Aeronautical University.
Papers
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Journal ArticleDOI
Speckle suppression through dual imaging polarimetry, and a ground-based image of the hr 4796a circumstellar disk
Sasha Hinkley,Sasha Hinkley,Ben R. Oppenheimer,Rémi Soummer,Douglas Brenner,James R. Graham,Marshall D. Perrin,Anand Sivaramakrishnan,Anand Sivaramakrishnan,Anand Sivaramakrishnan,James P. Lloyd,Lewis C. Roberts,Jeff Kuhn +12 more
TL;DR: In this article, a dual imaging polarimeter working in tandem with a Lyot coronagraph and adaptive optics was used to suppress the highly static speckle noise pattern, which is the greatest hindrance to ground-based direct imaging of planets and disks around nearby stars.
Journal ArticleDOI
Parallactic motion for companion discovery: an m-dwarf orbiting alcor
Neil Zimmerman,Neil Zimmerman,Ben R. Oppenheimer,Ben R. Oppenheimer,Sasha Hinkley,Douglas Brenner,Ian Parry,Anand Sivaramakrishnan,Anand Sivaramakrishnan,Lynne A. Hillenbrand,Charles Beichman,Justin R. Crepp,Gautam Vasisht,Lewis C. Roberts,Rick Burruss,David L. King,Rémi Soummer,Richard Dekany,Michael Shao,Antonin Bouchez,Jennifer E. Roberts,Stephanie Hunt +21 more
TL;DR: In this article, the A5V star Alcor has an M3-M4 dwarf companion, as evidenced by a novel astrometric technique, which combined with adaptive optics coronagraphy allowed for the detection and spectrophotometric characterization of the point source at a contrast of ~6 J- and H-band magnitudes and separation of 1'' from the primary star.
Proceedings ArticleDOI
Project 1640: the world's first ExAO coronagraphic hyperspectral imager for comparative planetary science
Ben R. Oppenheimer,Charles Beichman,Douglas Brenner,Rick Burruss,Eric Cady,Justin R. Crepp,Lynne A. Hillenbrand,Sasha Hinkley,E. R. Ligon,T. Lockhart,Ian Parry,Laurent Pueyo,Emily L. Rice,Lewis C. Roberts,Jennifer E. Roberts,Michael Shao,Anand Sivaramakrishnan,Rémi Soummer,Gautam Vasisht,Fred E. Vescelus,J. Kent Wallace,Chengxing Zhai,Neil T. Zimmerman +22 more
TL;DR: Project 1640 as mentioned in this paper is a high-contrast spectral imaging effort involving a coordinated set of instrumentation and software, built at AMNH, JPL, Cambridge and Caltech, and is fully operational.
Proceedings ArticleDOI
Is that really your Strehl ratio
Lewis C. Roberts,Marshall D. Perrin,Franck Marchis,Anand Sivaramakrishnan,Russell B. Makidon,Julian C. Christou,Bruce Macintosh,Lisa Poyneer,Marcos A. van Dam,Mitchell Troy +9 more
TL;DR: In this article, a series of simulated point spread functions (PSF) were created and sent around to the various members of the project, who then measured the Strehl ratio.
Journal ArticleDOI
Discovery and Characterization of a Faint Stellar Companion to the A3V Star Zeta Virginis
Sasha Hinkley,Ben R. Oppenheimer,Douglas Brenner,Neil Zimmerman,Neil Zimmerman,Lewis C. Roberts,Ian Parry,Rémi Soummer,Anand Sivaramakrishnan,Anand Sivaramakrishnan,Anand Sivaramakrishnan,Michal Simon,Marshall D. Perrin,David L. King,James P. Lloyd,Antonin Bouchez,Jennifer E. Roberts,Richard Dekany,Charles Beichman,Lynne A. Hillenbrand,Rick Burruss,Michael Shao,Gautam Vasisht +22 more
TL;DR: In this paper, the authors reported the discovery of a faint stellar companion to the A3V star zeta Virginis, which is ~7 magnitudes fainter than its host star in the H-band, and infrared imaging spanning 4.75 years over five epochs indicates this companion has common proper motion with its hoststar.