Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter
We present a new matched-filter algorithm for direct detection of point sources in the immediate vicinity of bright stars. The stellar point-spread function (PSF) is first subtracted using a Karhunen-Love image processing (KLIP) algorithm with angular and spectral differential imaging (ADI and SDI)....
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2017
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6244372017-06-29T03:00:33Z Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter Ruffio, Jean-Baptiste Macintosh, Bruce Wang, Jason J. Pueyo, Laurent Nielsen, Eric L. Rosa, Robert J. De Czekala, Ian Marley, Mark S. Arriaga, Pauline Bailey, Vanessa P. Barman, Travis Bulger, Joanna Chilcote, Jeffrey Cotten, Tara Doyon, Rene Duchene, Gaspard Fitzgerald, Michael P. Follette, Katherine B. Gerard, Benjamin L. Goodsell, Stephen J. Graham, James R. Greenbaum, Alexandra Z. Hibon, Pascale Hung, Li-Wei Ingraham, Patrick Kalas, Paul Konopacky, Quinn Larkin, James E. Maire, Jerome Marchis, Franck Marois, Christian Metchev, Stanimir Millar-Blanchaer, Maxwell A. Morzinski, Katie M. Oppenheimer, Rebecca Palmer, David Patience, Jennifer Perrin, Marshall Poyneer, Lisa Rajan, Abhijith Rameau, Julien Rantakyro, Fredrik T. Savransky, Dmitry Schneider, Adam C. Sivaramakrishnan, Anand Song, Inseok Soummer, Remi Thomas, Sandrine Wallace, J. Kent Ward-Duong, Kimberly Wiktorowicz, Sloane Wolff, Schuyler Univ Arizona, Lunar & Planetary Lab instrumentation: adaptive optics methods: statistical planetary systems surveys techniques: high angular resolution techniques: image processing We present a new matched-filter algorithm for direct detection of point sources in the immediate vicinity of bright stars. The stellar point-spread function (PSF) is first subtracted using a Karhunen-Love image processing (KLIP) algorithm with angular and spectral differential imaging (ADI and SDI). The KLIP-induced distortion of the astrophysical signal is included in the matched-filter template by computing a forward model of the PSF at every position in the image. To optimize the performance of the algorithm, we conduct extensive planet injection and recovery tests and tune the exoplanet spectra template and KLIP reduction aggressiveness to maximize the signalto- noise ratio (S/N) of the recovered planets. We show that only two spectral templates are necessary to recover any young Jovian exoplanets with minimal S/N loss. We also developed a complete pipeline for the automated detection of point-source candidates, the calculation of receiver operating characteristics (ROC), contrast curves based on. false positives, and completeness contours. We process in a uniform manner more than 330 data sets from the Gemini Planet Imager Exoplanet Survey and assess GPI typical sensitivity as a function of the star and the hypothetical companion spectral type. This work allows for the first time a comparison of different detection algorithms at a survey scale accounting for both planet completeness and false-positive rate. We show that the new forward model matched filter allows the detection of 50% fainter objects than a conventional cross-correlation technique with a Gaussian PSF template for the same false-positive rate. 2017-06-07 Article Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter 2017, 842 (1):14 The Astrophysical Journal 1538-4357 10.3847/1538-4357/aa72dd http://hdl.handle.net/10150/624437 http://arizona.openrepository.com/arizona/handle/10150/624437 The Astrophysical Journal en http://stacks.iop.org/0004-637X/842/i=1/a=14?key=crossref.c3fc0b96ce54f9d8f0cc5b4f8600b465 © 2017. The American Astronomical Society. All rights reserved. IOP PUBLISHING LTD |
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language |
en |
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topic |
instrumentation: adaptive optics methods: statistical planetary systems surveys techniques: high angular resolution techniques: image processing |
spellingShingle |
instrumentation: adaptive optics methods: statistical planetary systems surveys techniques: high angular resolution techniques: image processing Ruffio, Jean-Baptiste Macintosh, Bruce Wang, Jason J. Pueyo, Laurent Nielsen, Eric L. Rosa, Robert J. De Czekala, Ian Marley, Mark S. Arriaga, Pauline Bailey, Vanessa P. Barman, Travis Bulger, Joanna Chilcote, Jeffrey Cotten, Tara Doyon, Rene Duchene, Gaspard Fitzgerald, Michael P. Follette, Katherine B. Gerard, Benjamin L. Goodsell, Stephen J. Graham, James R. Greenbaum, Alexandra Z. Hibon, Pascale Hung, Li-Wei Ingraham, Patrick Kalas, Paul Konopacky, Quinn Larkin, James E. Maire, Jerome Marchis, Franck Marois, Christian Metchev, Stanimir Millar-Blanchaer, Maxwell A. Morzinski, Katie M. Oppenheimer, Rebecca Palmer, David Patience, Jennifer Perrin, Marshall Poyneer, Lisa Rajan, Abhijith Rameau, Julien Rantakyro, Fredrik T. Savransky, Dmitry Schneider, Adam C. Sivaramakrishnan, Anand Song, Inseok Soummer, Remi Thomas, Sandrine Wallace, J. Kent Ward-Duong, Kimberly Wiktorowicz, Sloane Wolff, Schuyler Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter |
description |
We present a new matched-filter algorithm for direct detection of point sources in the immediate vicinity of bright stars. The stellar point-spread function (PSF) is first subtracted using a Karhunen-Love image processing (KLIP) algorithm with angular and spectral differential imaging (ADI and SDI). The KLIP-induced distortion of the astrophysical signal is included in the matched-filter template by computing a forward model of the PSF at every position in the image. To optimize the performance of the algorithm, we conduct extensive planet injection and recovery tests and tune the exoplanet spectra template and KLIP reduction aggressiveness to maximize the signalto- noise ratio (S/N) of the recovered planets. We show that only two spectral templates are necessary to recover any young Jovian exoplanets with minimal S/N loss. We also developed a complete pipeline for the automated detection of point-source candidates, the calculation of receiver operating characteristics (ROC), contrast curves based on. false positives, and completeness contours. We process in a uniform manner more than 330 data sets from the Gemini Planet Imager Exoplanet Survey and assess GPI typical sensitivity as a function of the star and the hypothetical companion spectral type. This work allows for the first time a comparison of different detection algorithms at a survey scale accounting for both planet completeness and false-positive rate. We show that the new forward model matched filter allows the detection of 50% fainter objects than a conventional cross-correlation technique with a Gaussian PSF template for the same false-positive rate. |
author2 |
Univ Arizona, Lunar & Planetary Lab |
author_facet |
Univ Arizona, Lunar & Planetary Lab Ruffio, Jean-Baptiste Macintosh, Bruce Wang, Jason J. Pueyo, Laurent Nielsen, Eric L. Rosa, Robert J. De Czekala, Ian Marley, Mark S. Arriaga, Pauline Bailey, Vanessa P. Barman, Travis Bulger, Joanna Chilcote, Jeffrey Cotten, Tara Doyon, Rene Duchene, Gaspard Fitzgerald, Michael P. Follette, Katherine B. Gerard, Benjamin L. Goodsell, Stephen J. Graham, James R. Greenbaum, Alexandra Z. Hibon, Pascale Hung, Li-Wei Ingraham, Patrick Kalas, Paul Konopacky, Quinn Larkin, James E. Maire, Jerome Marchis, Franck Marois, Christian Metchev, Stanimir Millar-Blanchaer, Maxwell A. Morzinski, Katie M. Oppenheimer, Rebecca Palmer, David Patience, Jennifer Perrin, Marshall Poyneer, Lisa Rajan, Abhijith Rameau, Julien Rantakyro, Fredrik T. Savransky, Dmitry Schneider, Adam C. Sivaramakrishnan, Anand Song, Inseok Soummer, Remi Thomas, Sandrine Wallace, J. Kent Ward-Duong, Kimberly Wiktorowicz, Sloane Wolff, Schuyler |
author |
Ruffio, Jean-Baptiste Macintosh, Bruce Wang, Jason J. Pueyo, Laurent Nielsen, Eric L. Rosa, Robert J. De Czekala, Ian Marley, Mark S. Arriaga, Pauline Bailey, Vanessa P. Barman, Travis Bulger, Joanna Chilcote, Jeffrey Cotten, Tara Doyon, Rene Duchene, Gaspard Fitzgerald, Michael P. Follette, Katherine B. Gerard, Benjamin L. Goodsell, Stephen J. Graham, James R. Greenbaum, Alexandra Z. Hibon, Pascale Hung, Li-Wei Ingraham, Patrick Kalas, Paul Konopacky, Quinn Larkin, James E. Maire, Jerome Marchis, Franck Marois, Christian Metchev, Stanimir Millar-Blanchaer, Maxwell A. Morzinski, Katie M. Oppenheimer, Rebecca Palmer, David Patience, Jennifer Perrin, Marshall Poyneer, Lisa Rajan, Abhijith Rameau, Julien Rantakyro, Fredrik T. Savransky, Dmitry Schneider, Adam C. Sivaramakrishnan, Anand Song, Inseok Soummer, Remi Thomas, Sandrine Wallace, J. Kent Ward-Duong, Kimberly Wiktorowicz, Sloane Wolff, Schuyler |
author_sort |
Ruffio, Jean-Baptiste |
title |
Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter |
title_short |
Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter |
title_full |
Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter |
title_fullStr |
Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter |
title_full_unstemmed |
Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter |
title_sort |
improving and assessing planet sensitivity of the gpi exoplanet survey with a forward model matched filter |
publisher |
IOP PUBLISHING LTD |
publishDate |
2017 |
url |
http://hdl.handle.net/10150/624437 http://arizona.openrepository.com/arizona/handle/10150/624437 |
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