NICI: combining coronagraphy, ADI, and SDI

Etienne Artigau, Beth A. Biller, Zahed Wahhaj, Markus Hartung, Thomas L. Hayward, Laird M. Close, Mark R. Chun, Michael C. Liu, Gelys Trancho, Francois Rigaut, Douglas W. Toomey, Christ Ftaclas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Scopus citations


The Near-Infrared Coronagraphic Imager (NICI) is a high-contrast AO imager at the Gemini South telescope. The camera includes a coronagraphic mask and dual channel imaging for Spectral Differential Imaging (SDI). The instrument can also be used in a fixed Cassegrain Rotator mode for Angular Differential Imaging (ADI). While coronagraphy, SDI, and ADI have been applied before in direct imaging searches for exoplanets. NICI represents the first time that these 3 techniques can be combined. We present preliminary NICI commissioning data using these techniques and show that combining SDI and ADI results in significant gains.

Original languageEnglish (US)
Title of host publicationGround-based and Airborne Instrumentation for Astronomy II
StatePublished - 2008
EventGround-based and Airborne Instrumentation for Astronomy II - Marseille, France
Duration: Jun 23 2008Jun 28 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherGround-based and Airborne Instrumentation for Astronomy II


  • Adaptive optics
  • Infrared
  • Instrumentation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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