NICI: combining coronagraphy, ADI, and SDI
Date
2008
Authors
Artigau, Etienne
Biller, Beth
Wahhaj, Zahed
Hartung, Markus
Haywards, Thomas
Close, Laird
Chun, Mark
Liu, Michael C
Trancho, Gelys
Rigaut, Francois
Journal Title
Journal ISSN
Volume Title
Publisher
SPIE - The International Society for Optical Engineering
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.
Description
Keywords
Keywords: Cassegrain rotator; Coronagraphy; Direct imaging; Dual channel; Exo-planets; High contrast; Infrared; Instrumentation; Near Infrared; Astronomical satellites; Astrophysics; Image sensors; Instruments Adaptive optics; Infrared; Instrumentation
Citation
Collections
Source
Ground-Based and Airborne Instrumentation for Astronomy II
Type
Conference paper
Book Title
Entity type
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Restricted until
2037-12-31