GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques

Maxwell A. Millar-Blanchaer; Marshall D. Perrin; Li Wei Hung; Michael P. Fitzgerald; Jason J. Wang; Jeffrey Chilcote; James R. Graham; Sebastian Bruzzone; Paul G. Kalas

doi:10.1117/12.2233071

GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques

Maxwell A. Millar-Blanchaer^*, Marshall D. Perrin, Li Wei Hung, Michael P. Fitzgerald, Jason J. Wang, Jeffrey Chilcote, James R. Graham, Sebastian Bruzzone, Paul G. Kalas

^*Corresponding author for this work

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

29 Scopus citations

Abstract

The Gemini Planet Imager (GPI) has been designed for the direct detection and characterization of exoplanets and circumstellar disks. GPI is equipped with a dual channel polarimetry mode designed to take advantage of the inherently polarized light scattered off circumstellar material to further suppress the residual seeing haloleft uncorrected by the adaptive optics. We explore how recent advances in data reduction techniques reduce systematics and improve the achievable contrast in polarimetry mode. In particular, we consider different flux extraction techniques when constructing datacubes from raw data, division by a polarized at-field and a method for subtracting instrumental polarization. Using observations of unpolarized standard stars we find that GPI's instrumental polarization is consistent with being wavelength independent within our errors. In addition, we provide polarimetry contrast curves that demonstrate typical performance throughout the GPIES campaign.

Original language	English (US)
Title of host publication	Ground-Based and Airborne Instrumentation for Astronomy VI
Editors	Luc Simard, Christopher J. Evans, Hideki Takami
Publisher	SPIE
ISBN (Electronic)	9781510601956
DOIs	https://doi.org/10.1117/12.2233071
State	Published - 2016
Event	Ground-Based and Airborne Instrumentation for Astronomy VI - Edinburgh, United Kingdom Duration: Jun 26 2016 → Jun 30 2016

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9908
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-Based and Airborne Instrumentation for Astronomy VI
Country/Territory	United Kingdom
City	Edinburgh
Period	6/26/16 → 6/30/16

Funding

JRG was supported in part by NASA/NNX15AD95G.

Keywords

Gemini Planet Imager
High-contrast imaging
Polarimetry

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2233071

Cite this

Millar-Blanchaer, M. A., Perrin, M. D., Hung, L. W., Fitzgerald, M. P., Wang, J. J., Chilcote, J., Graham, J. R., Bruzzone, S., & Kalas, P. G. (2016). GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques. In L. Simard, C. J. Evans, & H. Takami (Eds.), Ground-Based and Airborne Instrumentation for Astronomy VI Article 990836 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9908). SPIE. https://doi.org/10.1117/12.2233071

Millar-Blanchaer, Maxwell A. ; Perrin, Marshall D. ; Hung, Li Wei et al. / GPI observational calibrations XIV : Polarimetric contrasts and new data reduction techniques. Ground-Based and Airborne Instrumentation for Astronomy VI. editor / Luc Simard ; Christopher J. Evans ; Hideki Takami. SPIE, 2016. (Proceedings of SPIE - The International Society for Optical Engineering).

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title = "GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques",

abstract = "The Gemini Planet Imager (GPI) has been designed for the direct detection and characterization of exoplanets and circumstellar disks. GPI is equipped with a dual channel polarimetry mode designed to take advantage of the inherently polarized light scattered off circumstellar material to further suppress the residual seeing haloleft uncorrected by the adaptive optics. We explore how recent advances in data reduction techniques reduce systematics and improve the achievable contrast in polarimetry mode. In particular, we consider different flux extraction techniques when constructing datacubes from raw data, division by a polarized at-field and a method for subtracting instrumental polarization. Using observations of unpolarized standard stars we find that GPI's instrumental polarization is consistent with being wavelength independent within our errors. In addition, we provide polarimetry contrast curves that demonstrate typical performance throughout the GPIES campaign.",

keywords = "Gemini Planet Imager, High-contrast imaging, Polarimetry",

author = "Millar-Blanchaer, {Maxwell A.} and Perrin, {Marshall D.} and Hung, {Li Wei} and Fitzgerald, {Michael P.} and Wang, {Jason J.} and Jeffrey Chilcote and Graham, {James R.} and Sebastian Bruzzone and Kalas, {Paul G.}",

note = "Funding Information: JRG was supported in part by NASA/NNX15AD95G. Publisher Copyright: {\textcopyright} 2016 SPIE.; Ground-Based and Airborne Instrumentation for Astronomy VI ; Conference date: 26-06-2016 Through 30-06-2016",

year = "2016",

doi = "10.1117/12.2233071",

language = "English (US)",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Luc Simard and Evans, {Christopher J.} and Hideki Takami",

booktitle = "Ground-Based and Airborne Instrumentation for Astronomy VI",

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Millar-Blanchaer, MA, Perrin, MD, Hung, LW, Fitzgerald, MP, Wang, JJ, Chilcote, J, Graham, JR, Bruzzone, S & Kalas, PG 2016, GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques. in L Simard, CJ Evans & H Takami (eds), Ground-Based and Airborne Instrumentation for Astronomy VI., 990836, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9908, SPIE, Ground-Based and Airborne Instrumentation for Astronomy VI, Edinburgh, United Kingdom, 6/26/16. https://doi.org/10.1117/12.2233071

GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques. / Millar-Blanchaer, Maxwell A.; Perrin, Marshall D.; Hung, Li Wei et al.
Ground-Based and Airborne Instrumentation for Astronomy VI. ed. / Luc Simard; Christopher J. Evans; Hideki Takami. SPIE, 2016. 990836 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9908).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T2 - Ground-Based and Airborne Instrumentation for Astronomy VI

AU - Millar-Blanchaer, Maxwell A.

AU - Perrin, Marshall D.

AU - Hung, Li Wei

AU - Fitzgerald, Michael P.

AU - Wang, Jason J.

AU - Chilcote, Jeffrey

AU - Graham, James R.

AU - Bruzzone, Sebastian

AU - Kalas, Paul G.

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N2 - The Gemini Planet Imager (GPI) has been designed for the direct detection and characterization of exoplanets and circumstellar disks. GPI is equipped with a dual channel polarimetry mode designed to take advantage of the inherently polarized light scattered off circumstellar material to further suppress the residual seeing haloleft uncorrected by the adaptive optics. We explore how recent advances in data reduction techniques reduce systematics and improve the achievable contrast in polarimetry mode. In particular, we consider different flux extraction techniques when constructing datacubes from raw data, division by a polarized at-field and a method for subtracting instrumental polarization. Using observations of unpolarized standard stars we find that GPI's instrumental polarization is consistent with being wavelength independent within our errors. In addition, we provide polarimetry contrast curves that demonstrate typical performance throughout the GPIES campaign.

AB - The Gemini Planet Imager (GPI) has been designed for the direct detection and characterization of exoplanets and circumstellar disks. GPI is equipped with a dual channel polarimetry mode designed to take advantage of the inherently polarized light scattered off circumstellar material to further suppress the residual seeing haloleft uncorrected by the adaptive optics. We explore how recent advances in data reduction techniques reduce systematics and improve the achievable contrast in polarimetry mode. In particular, we consider different flux extraction techniques when constructing datacubes from raw data, division by a polarized at-field and a method for subtracting instrumental polarization. Using observations of unpolarized standard stars we find that GPI's instrumental polarization is consistent with being wavelength independent within our errors. In addition, we provide polarimetry contrast curves that demonstrate typical performance throughout the GPIES campaign.

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ER -

Millar-Blanchaer MA, Perrin MD, Hung LW, Fitzgerald MP, Wang JJ, Chilcote J et al. GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques. In Simard L, Evans CJ, Takami H, editors, Ground-Based and Airborne Instrumentation for Astronomy VI. SPIE. 2016. 990836. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2233071

GPI observational calibrations XIV: Polarimetric contrasts and new data reduction techniques

Abstract

Publication series

Conference

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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