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dc.contributor.authorRuffio, Jean-Baptiste
dc.contributor.authorMacintosh, Bruce
dc.contributor.authorWang, Jason J.
dc.contributor.authorPueyo, Laurent
dc.contributor.authorNielsen, Eric L.
dc.contributor.authorDe Rosa, Robert J.
dc.contributor.authorCzekala, Ian
dc.contributor.authorMarley, Mark S.
dc.contributor.authorArriaga, Pauline
dc.contributor.authorBailey, Vanessa P.
dc.contributor.authorBarman, Travis
dc.contributor.authorBulger, Joanna
dc.contributor.authorChilcote, Jeffrey
dc.contributor.authorCotten, Tara
dc.contributor.authorDoyon, Rene
dc.contributor.authorDuchêne, Gaspard
dc.contributor.authorFitzgerald, Michael P.
dc.contributor.authorFollette, Katherine B.
dc.contributor.authorGerard, Benjamin L.
dc.contributor.authorGoodsell, Stephen J.
dc.contributor.authorGraham, James R.
dc.contributor.authorGreenbaum, Alexandra Z.
dc.contributor.authorHibon, Pascale
dc.contributor.authorHung, Li-Wei
dc.contributor.authorIngraham, Patrick
dc.contributor.authorKalas, Paul
dc.contributor.authorKonopacky, Quinn
dc.contributor.authorLarkin, James E.
dc.contributor.authorMaire, Jérôme
dc.contributor.authorMarchis, Franck
dc.contributor.authorMarois, Christian
dc.contributor.authorMetchev, Stanimir
dc.contributor.authorMillar-Blanchaer, Maxwell A.
dc.contributor.authorMorzinski, Katie M.
dc.contributor.authorOppenheimer, Rebecca
dc.contributor.authorPalmer, David
dc.contributor.authorPatience, Jennifer
dc.contributor.authorPerrin, Marshall
dc.contributor.authorPoyneer, Lisa
dc.contributor.authorRajan, Abhijith
dc.contributor.authorRameau, Julien
dc.contributor.authorRantakyrö, Fredrik T.
dc.contributor.authorSavransky, Dmitry
dc.contributor.authorSchneider, Adam C.
dc.contributor.authorSivaramakrishnan, Anand
dc.contributor.authorSong, Inseok
dc.contributor.authorSoummer, Remi
dc.contributor.authorThomas, Sandrine
dc.contributor.authorWallace, J. Kent
dc.contributor.authorWard-Duong, Kimberly
dc.contributor.authorWiktorowicz, Sloane
dc.contributor.authorWolff, Schuyler
dc.identifier.citationRuffio , J-B , Macintosh , B , Wang , J J , Pueyo , L , Nielsen , E L , De Rosa , R J , Czekala , I , Marley , M S , Arriaga , P , Bailey , V P , Barman , T , Bulger , J , Chilcote , J , Cotten , T , Doyon , R , Duchêne , G , Fitzgerald , M P , Follette , K B , Gerard , B L , Goodsell , S J , Graham , J R , Greenbaum , A Z , Hibon , P , Hung , L-W , Ingraham , P , Kalas , P , Konopacky , Q , Larkin , J E , Maire , J , Marchis , F , Marois , C , Metchev , S , Millar-Blanchaer , M A , Morzinski , K M , Oppenheimer , R , Palmer , D , Patience , J , Perrin , M , Poyneer , L , Rajan , A , Rameau , J , Rantakyrö , F T , Savransky , D , Schneider , A C , Sivaramakrishnan , A , Song , I , Soummer , R , Thomas , S , Wallace , J K , Ward-Duong , K , Wiktorowicz , S & Wolff , S 2017 , ' Improving and assessing planet sensitivity of the GPI exoplanet survey with a forward model matched filter ' , Astrophysical Journal , vol. 842 , no. 1 , 14 .
dc.identifier.otherBibCode: 2017ApJ...842...14R
dc.identifier.otherORCID: /0000-0002-1483-8811/work/146464257
dc.description.abstractWe 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-Loéve 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 signal-to-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.
dc.relation.ispartofAstrophysical Journalen
dc.subjectInstrumentation: adaptive opticsen
dc.subjectMethods: statisticalen
dc.subjectPlanetary systemsen
dc.subjectTechniques: high angular resolutionen
dc.subjectTechniques: image processingen
dc.subjectQB Astronomyen
dc.titleImproving and assessing planet sensitivity of the GPI exoplanet survey with a forward model matched filteren
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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