Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter
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Author
Ruffio, Jean-Baptiste
Macintosh, Bruce

Wang, Jason J.

Pueyo, Laurent
Nielsen, Eric L.

De Rosa, Robert J.

Czekala, I.

Marley, Mark S.

Arriaga, Pauline

Bailey, Vanessa P.
Barman, Travis S.

Bulger, Joanna

Chilcote, Jeffrey

Cotten, Tara

Doyon, Rene
Duchêne, 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 A.

Millar-Blanchaer, Maxwell A.

Morzinski, Katie M.

Oppenheimer, Rebecca

Palmer, David
Patience, Jenny

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

Affiliation
Univ Arizona, Lunar & Planetary LabIssue Date
2017-06-07Keywords
instrumentation: adaptive opticsmethods: statistical
planetary systems
surveys
techniques: high angular resolution
techniques: image processing
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IOP PUBLISHING LTDCitation
Improving and Assessing Planet Sensitivity of the GPI Exoplanet Survey with a Forward Model Matched Filter 2017, 842 (1):14 The Astrophysical JournalJournal
The Astrophysical JournalRights
© 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
1538-4357Version
Final published versionSponsors
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 QuebecAdditional Links
http://stacks.iop.org/0004-637X/842/i=1/a=14?key=crossref.c3fc0b96ce54f9d8f0cc5b4f8600b465ae974a485f413a2113503eed53cd6c53
10.3847/1538-4357/aa72dd