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Proceedings Paper

NICI: combining coronagraphy, ADI, and SDI
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Paper Abstract

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.

Paper Details

Date Published: 9 July 2008
PDF: 9 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70141Z (9 July 2008); doi: 10.1117/12.788390
Show Author Affiliations
Étienne Artigau, Gemini Observatory, Southern Operations Ctr., AURA (Chile)
Beth A. Biller, Institute for Astronomy, Univ. of Hawaii (United States)
Zahed Wahhaj, Institute for Astronomy, Univ. of Hawaii (United States)
Markus Hartung, Gemini Observatory, Southern Operations Ctr., AURA (Chile)
Thomas L. Hayward, Gemini Observatory, Southern Operations Ctr., AURA (Chile)
Laird M. Close, Steward Observatory, Univ. of Arizona (United States)
Mark R. Chun, Institute for Astronomy, Univ. of Hawaii (United States)
Michael C. Liu, Institute for Astronomy, Univ. of Hawaii (United States)
Gelys Trancho, Gemini Observatory, Southern Operations Ctr., AURA (Chile)
François Rigaut, Gemini Observatory, Southern Operations Ctr., AURA (Chile)
Douglas W. Toomey, Mauna Kea Infrared, LLC (United States)
Christ Ftaclas, Institute for Astronomy, Univ. of Hawaii (United States)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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