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. Toomeye; Christ Ftaclas

doi:10.1117/12.788390

NICI: combining coronagraphy, ADI, and SDI

Astrophysics 2009-11-13 v1

Authors: 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. Toomeye , Christ Ftaclas

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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.

Keywords

coronagraphy

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@article{arxiv.0809.3012,
  title  = {NICI: combining coronagraphy, ADI, and SDI},
  author = {Etienne Artigau and Beth A. Biller and Zahed Wahhaj and Markus Hartung and Thomas L. Hayward and Laird M. Close and Mark R. Chun and Michael C. Liu and Gelys Trancho and Francois Rigaut and Douglas W. Toomeye and Christ Ftaclas},
  journal= {arXiv preprint arXiv:0809.3012},
  year   = {2009}
}

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Proc. SPIE, Vol. 7014, 70141Z (2008)

NICI: combining coronagraphy, ADI, and SDI

Abstract

Keywords

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