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A New Algorithm for Point‐Spread Function Subtraction in High‐Contrast Imaging: A Demonstration with Angular Differential Imaging
Open accessAbstract
Direct imaging of exoplanets is limited by bright quasi-static speckles in the point-spread function (PSF) of the central star. This limitation can be reduced by subtraction of reference PSF images. We have developed an algorithm to construct an optimized reference PSF image from a set of reference images. This image is built as a linear combination of the reference images available, and the coefficients of the combination are optimized inside multiple subsections of the image independently to minimize the residual noise within each subsection. The algorithm developed can be used with many high-contrast imaging observing strategies relying on PSF subtraction, such as angular differential imaging (ADI), roll subtraction, spectral differential imaging, and reference star observations. The performance of the algorithm is demonstrated for ADI data. It is shown that for this type of data the new algorithm provides a gain in sensitivity by up to a factor of 3 at small separation over the algorithm previously used by Marois and colleagues.
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Cited by
Images of a fourth planet orbiting HR 8799
Marois, C., Zuckerman, B., Konopacky, Q. M., Macintosh, B., & Barman, T. (2010) · Nature · doi:10.1038/nature09684 · Cited by 955
Self-citationFirst light of the Gemini Planet Imager
Macintosh, B., Graham, J. R., Ingraham, P., Konopacky, Q., Marois, C., Perrin, M., Poyneer, L., Bauman, B., Barman, T., Burrows, A. S., et al. (2014) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1304215111 · Cited by 707
Self-citationDiscovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager
Macintosh, B., Graham, J. R., Barman, T., De Rosa, R. J., Konopacky, Q., Marley, M. S., Marois, C., Nielsen, E. L., Pueyo, L., Rajan, A., et al. (2015) · Science · doi:10.1126/science.aac5891 · Cited by 558
Self-citationFUNDAMENTAL LIMITATIONS OF HIGH CONTRAST IMAGING SET BY SMALL SAMPLE STATISTICS
Mawet, D., Milli, J., Wahhaj, Z., Pelat, D., Absil, O., Delacroix, C., Boccaletti, A., Kasper, M., Kenworthy, M., Marois, C., et al. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/792/2/97 · Cited by 369
Self-citationLafreniere, D., Doyon, R., Marois, C., Nadeau, D., Oppenheimer, B. R., Roche, P. F., Rigaut, F., Graham, J. R., Jayawardhana, R., Johnstone, D., et al. (2007) · The Astrophysical Journal · doi:10.1086/522826 · Cited by 323
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Metadata
- Authors
- Lafreniere, D., Marois, C., Doyon, R., Nadeau, D., & Artigau, E.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2007-05
- Volume
- 660
- Issue
- 1
- Pages
- 770-780
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1966785550
- Cited by
- 478
- References
- 0
- FWCI
- 6.11
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Lafreniere, D., Marois, C., Doyon, R., Nadeau, D., & Artigau, E. (2007). A New Algorithm for Point‐Spread Function Subtraction in High‐Contrast Imaging: A Demonstration with Angular Differential Imaging. The Astrophysical Journal. https://doi.org/10.1086/513180
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