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    Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter

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    Author
    Ruffio, Jean-Baptiste cc
    Macintosh, Bruce cc
    Wang, Jason J. cc
    Pueyo, Laurent
    Nielsen, Eric L. cc
    De Rosa, Robert J. cc
    Czekala, I. cc
    Marley, Mark S. cc
    Arriaga, Pauline cc
    Bailey, Vanessa P.
    Barman, Travis S. cc
    Bulger, Joanna cc
    Chilcote, Jeffrey cc
    Cotten, Tara cc
    Doyon, Rene
    Duchêne, Gaspard cc
    Fitzgerald, Michael P. cc
    Follette, Katherine B. cc
    Gerard, Benjamin L. cc
    Goodsell, Stephen J. cc
    Graham, James R.
    Greenbaum, Alexandra Z. cc
    Hibon, Pascale cc
    Hung, Li-Wei
    Ingraham, Patrick
    Kalas, Paul
    Konopacky, Quinn cc
    Larkin, James E. cc
    Maire, Jerome
    Marchis, Franck cc
    Marois, Christian cc
    Metchev, Stanimir A. cc
    Millar-Blanchaer, Maxwell A. cc
    Morzinski, Katie M. cc
    Oppenheimer, Rebecca cc
    Palmer, David
    Patience, Jenny cc
    Perrin, Marshall cc
    Poyneer, Lisa
    Rajan, Abhijith cc
    Rameau, Julien cc
    Rantakyro, Fredrik T.
    Savransky, Dmitry cc
    Schneider, Adam C. cc
    Sivaramakrishnan, Anand cc
    Song, Inseok cc
    Soummer, Remi cc
    Thomas, Sandrine cc
    Wallace, J. Kent
    Ward-Duong, Kimberly cc
    Wiktorowicz, Sloane cc
    Wolff, Schuyler cc
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    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2017-06-07
    Keywords
    instrumentation: adaptive optics
    methods: statistical
    planetary systems
    surveys
    techniques: high angular resolution
    techniques: image processing
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter 2017, 842 (1):14 The Astrophysical Journal
    Journal
    The Astrophysical Journal
    Rights
    © 2017. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    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.
    ISSN
    1538-4357
    DOI
    10.3847/1538-4357/aa72dd
    Version
    Final published version
    Sponsors
    NSF [AST-1411868, AST-1518332]; NASA [NNX14AJ80G, NNX15AD95G, NAS5-26555]; NASAs Science Mission Directorate; NASA Exoplanets Research Program (XRP) [NNX16AD44G]; NASA through Hubble Fellowship [51378.01-A]; Space Telescope Science Institute; Fonds de Recherche du Quebec
    Additional Links
    http://stacks.iop.org/0004-637X/842/i=1/a=14?key=crossref.c3fc0b96ce54f9d8f0cc5b4f8600b465
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/aa72dd
    Scopus Count
    Collections
    UA Faculty Publications

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