Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument
On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/plane...
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6220072017-01-20T03:00:43Z Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument Femenía Castellá, Bruno Serabyn, Eugene Mawet, Dimitri Absil, Olivier Wizinowich, Peter Matthews, Keith Huby, Elsa Bottom, Michael Campbell, Randy Chan, Dwight Carlomagno, Brunella Cetre, Sylvain Defrère, Denis Delacroix, Christian Gomez Gonzalez, Carlos Jolivet, Aïssa Karlsson, Mikael Lanclos, Kyle Lilley, Scott Milner, Steven Ngo, Henry Reggiani, Maddalena Simmons, Julia Tran, Hien Vargas Catalan, Ernesto Wertz, Olivier Univ Arizona, Steward Observ W. M. Keck Observatory (United States) Jet Propulsion Lab. (United States) California Institute of Technology (United States) Univ. of Liège (Belgium) W. M. Keck Observatory (United States) California Institute of Technology (United States) Univ. of Liège (Belgium) California Institute of Technology (United States) W. M. Keck Observatory (United States) W. M. Keck Observatory (United States) Univ. of Liège (Belgium) W. M. Keck Observatory (United States) Univ. of Arizona (United States) Cornell Univ. (United States) Univ. of Liège (Belgium) Univ. of Liège (Belgium) Uppsala Univ. (Sweden) W. M. Keck Observatory (United States) W. M. Keck Observatory (United States) W. M. Keck Observatory (United States) California Institute of Technology (United States) Univ. of Liège (Belgium) W. M. Keck Observatory (United States) W. M. Keck Observatory (United States) Uppsala Univ. (Sweden) Univ. of Liège (Belgium) WM Keck Observatory NIRC2 high-contrast imaging coronagraph vortex phase mask On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/planet contrast ratio when observing beyond the K band, but also to exploit the fact that the Keck II Adaptive Optics (AO) system delivers nearly extreme adaptive optics image quality (Strehl ratios values near 90%) at 3.7 mu m. We describe the hardware installation of the vortex phase mask during a routine NIRC2 service mission. The success of the project depends on extensive software development which has allowed the achievement of exquisite real-time pointing control as well as further contrast improvements by using speckle nulling to mitigate the effect of static speckles. First light of the new coronagraphic mode was on June 2015 with already very good initial results. Subsequent commissioning nights were interlaced with science nights by members of the VORTEX team with their respective scientific programs. The new capability and excellent results so far have motivated the VORTEX team and the Keck Science Steering Committee (KSSC) to offer the new mode in shared risk mode for 2016B. 2016-07-26 Article Bruno Femenía Castellá ; Eugene Serabyn ; Dimitri Mawet ; Olivier Absil ; Peter Wizinowich ; Keith Matthews ; Elsa Huby ; Michael Bottom ; Randy Campbell ; Dwight Chan ; Brunella Carlomagno ; Sylvain Cetre ; Denis Defrère ; Christian Delacroix ; Carlos Gomez Gonzalez ; Aïssa Jolivet ; Mikael Karlsson ; Kyle Lanclos ; Scott Lilley ; Steven Milner ; Henry Ngo ; Maddalena Reggiani ; Julia Simmons ; Hien Tran ; Ernesto Vargas Catalan and Olivier Wertz " Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument ", Proc. SPIE 9909, Adaptive Optics Systems V, 990922 (July 26, 2016); doi:10.1117/12.2233228; http://dx.doi.org/10.1117/12.2233228 0277-786X 10.1117/12.2233228 http://hdl.handle.net/10150/622007 http://arizona.openrepository.com/arizona/handle/10150/622007 ADAPTIVE OPTICS SYSTEMS V en http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2233228 © 2016 SPIE SPIE-INT SOC OPTICAL ENGINEERING |
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WM Keck Observatory NIRC2 high-contrast imaging coronagraph vortex phase mask |
spellingShingle |
WM Keck Observatory NIRC2 high-contrast imaging coronagraph vortex phase mask Femenía Castellá, Bruno Serabyn, Eugene Mawet, Dimitri Absil, Olivier Wizinowich, Peter Matthews, Keith Huby, Elsa Bottom, Michael Campbell, Randy Chan, Dwight Carlomagno, Brunella Cetre, Sylvain Defrère, Denis Delacroix, Christian Gomez Gonzalez, Carlos Jolivet, Aïssa Karlsson, Mikael Lanclos, Kyle Lilley, Scott Milner, Steven Ngo, Henry Reggiani, Maddalena Simmons, Julia Tran, Hien Vargas Catalan, Ernesto Wertz, Olivier Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument |
description |
On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/planet contrast ratio when observing beyond the K band, but also to exploit the fact that the Keck II Adaptive Optics (AO) system delivers nearly extreme adaptive optics image quality (Strehl ratios values near 90%) at 3.7 mu m. We describe the hardware installation of the vortex phase mask during a routine NIRC2 service mission. The success of the project depends on extensive software development which has allowed the achievement of exquisite real-time pointing control as well as further contrast improvements by using speckle nulling to mitigate the effect of static speckles. First light of the new coronagraphic mode was on June 2015 with already very good initial results. Subsequent commissioning nights were interlaced with science nights by members of the VORTEX team with their respective scientific programs. The new capability and excellent results so far have motivated the VORTEX team and the Keck Science Steering Committee (KSSC) to offer the new mode in shared risk mode for 2016B. |
author2 |
Univ Arizona, Steward Observ |
author_facet |
Univ Arizona, Steward Observ Femenía Castellá, Bruno Serabyn, Eugene Mawet, Dimitri Absil, Olivier Wizinowich, Peter Matthews, Keith Huby, Elsa Bottom, Michael Campbell, Randy Chan, Dwight Carlomagno, Brunella Cetre, Sylvain Defrère, Denis Delacroix, Christian Gomez Gonzalez, Carlos Jolivet, Aïssa Karlsson, Mikael Lanclos, Kyle Lilley, Scott Milner, Steven Ngo, Henry Reggiani, Maddalena Simmons, Julia Tran, Hien Vargas Catalan, Ernesto Wertz, Olivier |
author |
Femenía Castellá, Bruno Serabyn, Eugene Mawet, Dimitri Absil, Olivier Wizinowich, Peter Matthews, Keith Huby, Elsa Bottom, Michael Campbell, Randy Chan, Dwight Carlomagno, Brunella Cetre, Sylvain Defrère, Denis Delacroix, Christian Gomez Gonzalez, Carlos Jolivet, Aïssa Karlsson, Mikael Lanclos, Kyle Lilley, Scott Milner, Steven Ngo, Henry Reggiani, Maddalena Simmons, Julia Tran, Hien Vargas Catalan, Ernesto Wertz, Olivier |
author_sort |
Femenía Castellá, Bruno |
title |
Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument |
title_short |
Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument |
title_full |
Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument |
title_fullStr |
Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument |
title_full_unstemmed |
Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument |
title_sort |
commissioning and first light results of an l'-band vortex coronagraph with the keck ii adaptive optics nirc2 science instrument |
publisher |
SPIE-INT SOC OPTICAL ENGINEERING |
publishDate |
2016 |
url |
Bruno Femenía Castellá ; Eugene Serabyn ; Dimitri Mawet ; Olivier Absil ; Peter Wizinowich ; Keith Matthews ; Elsa Huby ; Michael Bottom ; Randy Campbell ; Dwight Chan ; Brunella Carlomagno ; Sylvain Cetre ; Denis Defrère ; Christian Delacroix ; Carlos Gomez Gonzalez ; Aïssa Jolivet ; Mikael Karlsson ; Kyle Lanclos ; Scott Lilley ; Steven Milner ; Henry Ngo ; Maddalena Reggiani ; Julia Simmons ; Hien Tran ; Ernesto Vargas Catalan and Olivier Wertz " Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument ", Proc. SPIE 9909, Adaptive Optics Systems V, 990922 (July 26, 2016); doi:10.1117/12.2233228; http://dx.doi.org/10.1117/12.2233228 http://hdl.handle.net/10150/622007 http://arizona.openrepository.com/arizona/handle/10150/622007 |
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