NICI: combining coronagraphy, ADI, and SDI

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

doi:10.1117/12.788390

9 July 2008 NICI: combining coronagraphy, ADI, and SDI

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

Author Affiliations +

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 70141Z (2008) https://doi.org/10.1117/12.788390
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

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Étienne Artigau, Beth A. Biller, Zahed Wahhaj, Markus Hartung, Thomas L. Hayward, Laird M. Close, Mark R. Chun, Michael C. Liu, Gelys Trancho, François Rigaut, Douglas W. Toomey, and Christ Ftaclas "NICI: combining coronagraphy, ADI, and SDI", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70141Z (9 July 2008); https://doi.org/10.1117/12.788390

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