The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging

Joseph D. Long; Jared R. Males; Katie M. Morzinski; Laird M. Close; Frans Snik; Matthew A. Kenworthy; Gilles P.P.L. Otten; John Monnier; Volker Tolls; Alycia Weinberger

doi:10.1117/12.2312874

The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging

Joseph D. Long
, Jared R. Males
, Katie M. Morzinski
, Laird M. Close
, Frans Snik
, Matthew A. Kenworthy
, Gilles P.P.L. Otten
, John Monnier
, Volker Tolls
, Alycia Weinberger

Astronomy

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

3 Scopus citations

Abstract

Despite promising astrometric signals, to date there has been no success in direct imaging of a hypothesized third member of the Sirius system. Using the Clio instrument and MagAO adaptive optics system on the Magellan Clay 6.5 m telescope, we have obtained extensive imagery of Sirius through a vector apodizing phase plate (vAPP) coronagraph in a narrowband filter at 3.9 microns. The vAPP coronagraph and MagAO allow us to be sensitive to planets much less massive than the limits set by previous non-detections. However, analysis of these data presents challenges due to the target's brightness and unique characteristics of the instrument. We present a comparison of dimensionality reduction techniques to construct background illumination maps for the whole detector using the areas of the detector that are not dominated by starlight. Additionally, we describe a procedure for sub-pixel alignment of vAPP data using a physical-optics-based model of the coronagraphic PSF.

Original language	English (US)
Title of host publication	Adaptive Optics Systems VI
Editors	Dirk Schmidt, Laura Schreiber, Laird M. Close
Publisher	SPIE
ISBN (Print)	9781510619593
DOIs	https://doi.org/10.1117/12.2312874
State	Published - 2018
Event	Adaptive Optics Systems VI 2018 - Austin, United States Duration: Jun 10 2018 → Jun 15 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10703
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Other

Other	Adaptive Optics Systems VI 2018
Country/Territory	United States
City	Austin
Period	6/10/18 → 6/15/18

Keywords

background subtraction
high-contrast imaging
thermal infrared

ASJC Scopus subject areas

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

Access to Document

10.1117/12.2312874

Cite this

Long, J. D., Males, J. R., Morzinski, K. M., Close, L. M., Snik, F., Kenworthy, M. A., Otten, G. P. P. L., Monnier, J., Tolls, V., & Weinberger, A. (2018). The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging. In D. Schmidt, L. Schreiber, & L. M. Close (Eds.), Adaptive Optics Systems VI Article 107032T (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10703). SPIE. https://doi.org/10.1117/12.2312874

The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging. / Long, Joseph D.; Males, Jared R.; Morzinski, Katie M. et al.
Adaptive Optics Systems VI. ed. / Dirk Schmidt; Laura Schreiber; Laird M. Close. SPIE, 2018. 107032T (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10703).

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

Long, JD, Males, JR, Morzinski, KM, Close, LM, Snik, F, Kenworthy, MA, Otten, GPPL, Monnier, J, Tolls, V & Weinberger, A 2018, The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging. in D Schmidt, L Schreiber & LM Close (eds), Adaptive Optics Systems VI., 107032T, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10703, SPIE, Adaptive Optics Systems VI 2018, Austin, United States, 6/10/18. https://doi.org/10.1117/12.2312874

Long JD, Males JR, Morzinski KM, Close LM, Snik F, Kenworthy MA et al. The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging. In Schmidt D, Schreiber L, Close LM, editors, Adaptive Optics Systems VI. SPIE. 2018. 107032T. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2312874

Long, Joseph D. ; Males, Jared R. ; Morzinski, Katie M. et al. / The hunt for Sirius Ab : Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging. Adaptive Optics Systems VI. editor / Dirk Schmidt ; Laura Schreiber ; Laird M. Close. SPIE, 2018. (Proceedings of SPIE - The International Society for Optical Engineering).

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title = "The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging",

abstract = "Despite promising astrometric signals, to date there has been no success in direct imaging of a hypothesized third member of the Sirius system. Using the Clio instrument and MagAO adaptive optics system on the Magellan Clay 6.5 m telescope, we have obtained extensive imagery of Sirius through a vector apodizing phase plate (vAPP) coronagraph in a narrowband filter at 3.9 microns. The vAPP coronagraph and MagAO allow us to be sensitive to planets much less massive than the limits set by previous non-detections. However, analysis of these data presents challenges due to the target's brightness and unique characteristics of the instrument. We present a comparison of dimensionality reduction techniques to construct background illumination maps for the whole detector using the areas of the detector that are not dominated by starlight. Additionally, we describe a procedure for sub-pixel alignment of vAPP data using a physical-optics-based model of the coronagraphic PSF.",

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author = "Long, \{Joseph D.\} and Males, \{Jared R.\} and Morzinski, \{Katie M.\} and Close, \{Laird M.\} and Frans Snik and Kenworthy, \{Matthew A.\} and Otten, \{Gilles P.P.L.\} and John Monnier and Volker Tolls and Alycia Weinberger",

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doi = "10.1117/12.2312874",

language = "English (US)",

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AU - Close, Laird M.

AU - Snik, Frans

AU - Kenworthy, Matthew A.

AU - Otten, Gilles P.P.L.

AU - Monnier, John

AU - Tolls, Volker

AU - Weinberger, Alycia

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N2 - Despite promising astrometric signals, to date there has been no success in direct imaging of a hypothesized third member of the Sirius system. Using the Clio instrument and MagAO adaptive optics system on the Magellan Clay 6.5 m telescope, we have obtained extensive imagery of Sirius through a vector apodizing phase plate (vAPP) coronagraph in a narrowband filter at 3.9 microns. The vAPP coronagraph and MagAO allow us to be sensitive to planets much less massive than the limits set by previous non-detections. However, analysis of these data presents challenges due to the target's brightness and unique characteristics of the instrument. We present a comparison of dimensionality reduction techniques to construct background illumination maps for the whole detector using the areas of the detector that are not dominated by starlight. Additionally, we describe a procedure for sub-pixel alignment of vAPP data using a physical-optics-based model of the coronagraphic PSF.

AB - Despite promising astrometric signals, to date there has been no success in direct imaging of a hypothesized third member of the Sirius system. Using the Clio instrument and MagAO adaptive optics system on the Magellan Clay 6.5 m telescope, we have obtained extensive imagery of Sirius through a vector apodizing phase plate (vAPP) coronagraph in a narrowband filter at 3.9 microns. The vAPP coronagraph and MagAO allow us to be sensitive to planets much less massive than the limits set by previous non-detections. However, analysis of these data presents challenges due to the target's brightness and unique characteristics of the instrument. We present a comparison of dimensionality reduction techniques to construct background illumination maps for the whole detector using the areas of the detector that are not dominated by starlight. Additionally, we describe a procedure for sub-pixel alignment of vAPP data using a physical-optics-based model of the coronagraphic PSF.

KW - background subtraction

KW - high-contrast imaging

KW - thermal infrared

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PB - SPIE

Y2 - 10 June 2018 through 15 June 2018

ER -

The hunt for Sirius Ab: Comparison of algorithmic sky and PSF estimation performance in deep coronagraphic thermal-IR high contrast imaging

Abstract

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Keywords

ASJC Scopus subject areas

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