Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
Identifieur interne : 007E92 ( Main/Exploration ); précédent : 007E91; suivant : 007E93Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
Auteurs : M. D. Albrow [Nouvelle-Zélande] ; K. Horne ; D. M. Bramich [Espagne] ; P. Fouqué [France] ; V. R. Miller [Nouvelle-Zélande] ; J. Beaulieu [France] ; C. Coutures [France] ; J. Menzies [Afrique du Sud] ; A. Williams [Australie] ; V. Batista [France] ; D. P. Bennett [États-Unis] ; S. Brillant [Chili] ; A. Cassan [Allemagne] ; S. Dieters [France] ; D. Dominis Prester [Croatie] ; J. Donatowicz [Autriche] ; J. Greenhill [Australie] ; N. Kains ; S. R. Kane [États-Unis] ; D. Kubas [Chili] ; J. B. Marquette [France] ; K. R. Pollard [Nouvelle-Zélande] ; K. C. Sahu [États-Unis] ; Y. Tsapras [États-Unis] ; J. Wambsganss [Allemagne] ; M. Zub [Allemagne]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2009-08-21.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Méthode statistique.
English descriptors
- KwdEn :
- Accurate photometry, Acta astron, Alard lupton, Albrow, Algorithm, Algorithms, Arellano ferro, Astrometric reference, Blended events, Blended microlensing events, Bramich, Convolution kernel, Correct coordinates, Correct position, Cubic interpolation, Data points, Difference image, Difference images, Difference imaging, Difference imaging photometry, Effective number, Error bars, Galactic bulge, Geometric parameters, Gravitational microlensing, Hessian matrix, Image processing, Imaging, Individual images, Irregular psfs, Isis, Isis code, Journal compilation, Kernel, Lens position, Lens star, Light curve, Light curves, Microlenses, Microlensing, Microlensing event, Microlensing event ogle, Microlensing events, Mnras, Nearest pixel, Notre dame, Npix, Npix fsky, Numerical kernel, Ogle, Optimal extraction, Optimal photometry, Performance, Perth observatory, Photometric, Photometric aperture, Photometric reference image, Photometry, Pixel, Pixels arcsec, Planet collaboration, Planets, Poisson, Poisson reference, Precise determination, Real time, Reference image, Reference template, Residual, Residual image, Residual images, Saao, Saao observations, Sample data, Single difference image, Source star, Statistical method, Subpixel, Subpixel registration, Subpixel shift, Such images, Target image, Target images, Target location, Target star, Telescope sites, Tting, Uncertainty, Variable stars, Variance.
- Teeft :
- Accurate photometry, Acta astron, Alard lupton, Albrow, Algorithm, Arellano ferro, Astrometric reference, Blended events, Blended microlensing events, Bramich, Convolution kernel, Correct coordinates, Correct position, Cubic interpolation, Data points, Difference image, Difference images, Difference imaging, Difference imaging photometry, Effective number, Error bars, Galactic bulge, Geometric parameters, Gravitational microlensing, Hessian matrix, Imaging, Individual images, Irregular psfs, Isis, Isis code, Journal compilation, Kernel, Lens position, Lens star, Light curve, Light curves, Microlensing, Microlensing event, Microlensing event ogle, Microlensing events, Mnras, Nearest pixel, Notre dame, Npix, Npix fsky, Numerical kernel, Ogle, Optimal extraction, Optimal photometry, Perth observatory, Photometric, Photometric aperture, Photometric reference image, Photometry, Pixel, Pixels arcsec, Planet collaboration, Poisson, Poisson reference, Precise determination, Real time, Reference image, Reference template, Residual, Residual image, Residual images, Saao, Saao observations, Sample data, Single difference image, Source star, Subpixel, Subpixel registration, Subpixel shift, Such images, Target image, Target images, Target location, Target star, Telescope sites, Tting, Variable stars, Variance.
Abstract
The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source‐star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.
Url:
- https://api.istex.fr/document/47D7065FE5601F3E5B7E324BF6189A1AD3FE2D28/fulltext/pdf
- https://api.istex.fr/document/A3134BD63E717DD5413C4892BAB348A34A5FB296/fulltext/pdf
DOI: 10.1111/j.1365-2966.2009.15098.x
Affiliations:
- Afrique du Sud, Allemagne, Australie, Autriche, Chili, Croatie, Espagne, France, Nouvelle-Zélande, États-Unis
- Bade-Wurtemberg, Californie, District de Karlsruhe, Indiana, Maryland, Vienne (Autriche), Île-de-France
- Heidelberg, Paris, Vienne (Autriche)
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Le document en format XML
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Menzies</name><affiliation wicri:level="1"><country xml:lang="fr">Afrique du Sud</country><wicri:regionArea>South African Astronomical Observatory, PO Box 9, 7935 Observatory</wicri:regionArea><wicri:noRegion>7935 Observatory</wicri:noRegion></affiliation></author><author><name sortKey="Williams, A" sort="Williams, A" uniqKey="Williams A" first="A." last="Williams">A. Williams</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Perth Observatory, Walnut Road, Bickley, Perth 6076</wicri:regionArea><wicri:noRegion>Perth 6076</wicri:noRegion></affiliation></author><author><name sortKey="Batista, V" sort="Batista, V" uniqKey="Batista V" first="V." last="Batista">V. 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Brillant</name><affiliation wicri:level="1"><country xml:lang="fr">Chili</country><wicri:regionArea>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago</wicri:regionArea><wicri:noRegion>Santiago</wicri:noRegion></affiliation></author><author><name sortKey="Cassan, A" sort="Cassan, A" uniqKey="Cassan A" first="A." last="Cassan">A. Cassan</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg</wicri:regionArea><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris</wicri:regionArea><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></affiliation></author><author><name sortKey="Prester, D Dominis" sort="Prester, D Dominis" uniqKey="Prester D" first="D. Dominis" last="Prester">D. Dominis Prester</name><affiliation wicri:level="1"><country xml:lang="fr">Croatie</country><wicri:regionArea>Department of Physics, University of Rijeka, Omladinska 14, 51000 Rijeka</wicri:regionArea><wicri:noRegion>51000 Rijeka</wicri:noRegion></affiliation></author><author><name sortKey="Donatowicz, J" sort="Donatowicz, J" uniqKey="Donatowicz J" first="J." last="Donatowicz">J. Donatowicz</name><affiliation wicri:level="3"><country xml:lang="fr">Autriche</country><wicri:regionArea>Technical University of Vienna, Department of Computing, Wiedner Hauptstrasse 10, Vienna</wicri:regionArea><placeName><settlement type="city">Vienne (Autriche)</settlement><region nuts="2" type="province">Vienne (Autriche)</region></placeName></affiliation></author><author><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart, Tasmania 7001</wicri:regionArea><wicri:noRegion>Tasmania 7001</wicri:noRegion></affiliation></author><author><name sortKey="Kains, N" sort="Kains, N" uniqKey="Kains N" first="N." last="Kains">N. Kains</name><affiliation><wicri:noCountry code="subField">9SS</wicri:noCountry></affiliation></author><author><name sortKey="Kane, S R" sort="Kane, S R" uniqKey="Kane S" first="S. R." last="Kane">S. R. Kane</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>NASA Exoplanet Science Institute, Caltech, MS 100‐22, 770 South Wilson Avenue Pasadena, CA 91125</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Kubas, D" sort="Kubas, D" uniqKey="Kubas D" first="D." last="Kubas">D. Kubas</name><affiliation wicri:level="1"><country xml:lang="fr">Chili</country><wicri:regionArea>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago</wicri:regionArea><wicri:noRegion>Santiago</wicri:noRegion></affiliation></author><author><name sortKey="Marquette, J B" sort="Marquette, J B" uniqKey="Marquette J" first="J. B." last="Marquette">J. B. Marquette</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris</wicri:regionArea><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Pollard, K R" sort="Pollard, K R" uniqKey="Pollard K" first="K. R." last="Pollard">K. R. Pollard</name><affiliation wicri:level="1"><country xml:lang="fr">Nouvelle-Zélande</country><wicri:regionArea>Beatrice Tinsley Institute, Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch</wicri:regionArea><wicri:noRegion>Christchurch</wicri:noRegion></affiliation></author><author><name sortKey="Sahu, K C" sort="Sahu, K C" uniqKey="Sahu K" first="K. C." last="Sahu">K. C. Sahu</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Tsapras, Y" sort="Tsapras, Y" uniqKey="Tsapras Y" first="Y." last="Tsapras">Y. Tsapras</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation><affiliation></affiliation></author><author><name sortKey="Wambsganss, J" sort="Wambsganss, J" uniqKey="Wambsganss J" first="J." last="Wambsganss">J. Wambsganss</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg</wicri:regionArea><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Zub, M" sort="Zub, M" uniqKey="Zub M" first="M." last="Zub">M. Zub</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg</wicri:regionArea><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="alt">MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><biblScope unit="vol">397</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="2099">2099</biblScope><biblScope unit="page" to="2105">2105</biblScope><biblScope unit="page-count">7</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2009-08-21">2009-08-21</date></imprint><idno type="ISSN">0035-8711</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Accurate photometry</term><term>Acta astron</term><term>Alard lupton</term><term>Albrow</term><term>Algorithm</term><term>Algorithms</term><term>Arellano ferro</term><term>Astrometric reference</term><term>Blended events</term><term>Blended microlensing events</term><term>Bramich</term><term>Convolution kernel</term><term>Correct coordinates</term><term>Correct position</term><term>Cubic interpolation</term><term>Data points</term><term>Difference image</term><term>Difference images</term><term>Difference imaging</term><term>Difference imaging photometry</term><term>Effective number</term><term>Error bars</term><term>Galactic bulge</term><term>Geometric parameters</term><term>Gravitational microlensing</term><term>Hessian matrix</term><term>Image processing</term><term>Imaging</term><term>Individual images</term><term>Irregular psfs</term><term>Isis</term><term>Isis code</term><term>Journal compilation</term><term>Kernel</term><term>Lens position</term><term>Lens star</term><term>Light curve</term><term>Light curves</term><term>Microlenses</term><term>Microlensing</term><term>Microlensing event</term><term>Microlensing event ogle</term><term>Microlensing events</term><term>Mnras</term><term>Nearest pixel</term><term>Notre dame</term><term>Npix</term><term>Npix fsky</term><term>Numerical kernel</term><term>Ogle</term><term>Optimal extraction</term><term>Optimal photometry</term><term>Performance</term><term>Perth observatory</term><term>Photometric</term><term>Photometric aperture</term><term>Photometric reference image</term><term>Photometry</term><term>Pixel</term><term>Pixels arcsec</term><term>Planet collaboration</term><term>Planets</term><term>Poisson</term><term>Poisson reference</term><term>Precise determination</term><term>Real time</term><term>Reference image</term><term>Reference template</term><term>Residual</term><term>Residual image</term><term>Residual images</term><term>Saao</term><term>Saao observations</term><term>Sample data</term><term>Single difference image</term><term>Source star</term><term>Statistical method</term><term>Subpixel</term><term>Subpixel registration</term><term>Subpixel shift</term><term>Such images</term><term>Target image</term><term>Target images</term><term>Target location</term><term>Target star</term><term>Telescope sites</term><term>Tting</term><term>Uncertainty</term><term>Variable stars</term><term>Variance</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Algorithme</term><term>Incertitude</term><term>Microlentille</term><term>Méthode statistique</term><term>Performance</term><term>Photométrie</term><term>Planète</term><term>Traitement image</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Accurate photometry</term><term>Acta astron</term><term>Alard lupton</term><term>Albrow</term><term>Algorithm</term><term>Arellano ferro</term><term>Astrometric reference</term><term>Blended events</term><term>Blended microlensing events</term><term>Bramich</term><term>Convolution kernel</term><term>Correct coordinates</term><term>Correct position</term><term>Cubic interpolation</term><term>Data points</term><term>Difference image</term><term>Difference images</term><term>Difference imaging</term><term>Difference imaging photometry</term><term>Effective number</term><term>Error bars</term><term>Galactic bulge</term><term>Geometric parameters</term><term>Gravitational microlensing</term><term>Hessian matrix</term><term>Imaging</term><term>Individual images</term><term>Irregular psfs</term><term>Isis</term><term>Isis code</term><term>Journal compilation</term><term>Kernel</term><term>Lens position</term><term>Lens star</term><term>Light curve</term><term>Light curves</term><term>Microlensing</term><term>Microlensing event</term><term>Microlensing event ogle</term><term>Microlensing events</term><term>Mnras</term><term>Nearest pixel</term><term>Notre dame</term><term>Npix</term><term>Npix fsky</term><term>Numerical kernel</term><term>Ogle</term><term>Optimal extraction</term><term>Optimal photometry</term><term>Perth observatory</term><term>Photometric</term><term>Photometric aperture</term><term>Photometric reference image</term><term>Photometry</term><term>Pixel</term><term>Pixels arcsec</term><term>Planet collaboration</term><term>Poisson</term><term>Poisson reference</term><term>Precise determination</term><term>Real time</term><term>Reference image</term><term>Reference template</term><term>Residual</term><term>Residual image</term><term>Residual images</term><term>Saao</term><term>Saao observations</term><term>Sample data</term><term>Single difference image</term><term>Source star</term><term>Subpixel</term><term>Subpixel registration</term><term>Subpixel shift</term><term>Such images</term><term>Target image</term><term>Target images</term><term>Target location</term><term>Target star</term><term>Telescope sites</term><term>Tting</term><term>Variable stars</term><term>Variance</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Méthode statistique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source‐star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference images. It is shown how the photometric reference flux need not be measured directly from the reference image but can be obtained from measurements of the difference images combined with the knowledge of the statistical flux uncertainties. The improved performance of the new algorithm, relative to isis2, is demonstrated.</div></front></TEI><affiliations><list><country><li>Afrique du Sud</li><li>Allemagne</li><li>Australie</li><li>Autriche</li><li>Chili</li><li>Croatie</li><li>Espagne</li><li>France</li><li>Nouvelle-Zélande</li><li>États-Unis</li></country><region><li>Bade-Wurtemberg</li><li>Californie</li><li>District de Karlsruhe</li><li>Indiana</li><li>Maryland</li><li>Vienne (Autriche)</li><li>Île-de-France</li></region><settlement><li>Heidelberg</li><li>Paris</li><li>Vienne (Autriche)</li></settlement></list><tree><noCountry><name sortKey="Horne, K" sort="Horne, K" uniqKey="Horne K" first="K." last="Horne">K. Horne</name><name sortKey="Kains, N" sort="Kains, N" uniqKey="Kains N" first="N." last="Kains">N. Kains</name></noCountry><country name="Nouvelle-Zélande"><noRegion><name sortKey="Albrow, M D" sort="Albrow, M D" uniqKey="Albrow M" first="M. D." last="Albrow">M. D. Albrow</name></noRegion><name sortKey="Albrow, M D" sort="Albrow, M D" uniqKey="Albrow M" first="M. D." last="Albrow">M. D. Albrow</name><name sortKey="Miller, V R" sort="Miller, V R" uniqKey="Miller V" first="V. R." last="Miller">V. R. Miller</name><name sortKey="Pollard, K R" sort="Pollard, K R" uniqKey="Pollard K" first="K. R." last="Pollard">K. R. Pollard</name></country><country name="Espagne"><noRegion><name sortKey="Bramich, D M" sort="Bramich, D M" uniqKey="Bramich D" first="D. M." last="Bramich">D. M. Bramich</name></noRegion></country><country name="France"><noRegion><name sortKey="Fouque, P" sort="Fouque, P" uniqKey="Fouque P" first="P." last="Fouqué">P. Fouqué</name></noRegion><name sortKey="Batista, V" sort="Batista, V" uniqKey="Batista V" first="V." last="Batista">V. Batista</name><name sortKey="Beaulieu, J" sort="Beaulieu, J" uniqKey="Beaulieu J" first="J." last="Beaulieu">J. Beaulieu</name><name sortKey="Coutures, C" sort="Coutures, C" uniqKey="Coutures C" first="C." last="Coutures">C. Coutures</name><name sortKey="Coutures, C" sort="Coutures, C" uniqKey="Coutures C" first="C." last="Coutures">C. Coutures</name><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><name sortKey="Marquette, J B" sort="Marquette, J B" uniqKey="Marquette J" first="J. B." last="Marquette">J. B. Marquette</name></country><country name="Afrique du Sud"><noRegion><name sortKey="Menzies, J" sort="Menzies, J" uniqKey="Menzies J" first="J." last="Menzies">J. Menzies</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Williams, A" sort="Williams, A" uniqKey="Williams A" first="A." last="Williams">A. Williams</name></noRegion><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name></country><country name="États-Unis"><region name="Indiana"><name sortKey="Bennett, D P" sort="Bennett, D P" uniqKey="Bennett D" first="D. P." last="Bennett">D. P. Bennett</name></region><name sortKey="Kane, S R" sort="Kane, S R" uniqKey="Kane S" first="S. R." last="Kane">S. R. Kane</name><name sortKey="Sahu, K C" sort="Sahu, K C" uniqKey="Sahu K" first="K. C." last="Sahu">K. C. Sahu</name><name sortKey="Tsapras, Y" sort="Tsapras, Y" uniqKey="Tsapras Y" first="Y." last="Tsapras">Y. Tsapras</name></country><country name="Chili"><noRegion><name sortKey="Brillant, S" sort="Brillant, S" uniqKey="Brillant S" first="S." last="Brillant">S. Brillant</name></noRegion><name sortKey="Kubas, D" sort="Kubas, D" uniqKey="Kubas D" first="D." last="Kubas">D. Kubas</name></country><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Cassan, A" sort="Cassan, A" uniqKey="Cassan A" first="A." last="Cassan">A. Cassan</name></region><name sortKey="Wambsganss, J" sort="Wambsganss, J" uniqKey="Wambsganss J" first="J." last="Wambsganss">J. Wambsganss</name><name sortKey="Zub, M" sort="Zub, M" uniqKey="Zub M" first="M." last="Zub">M. Zub</name></country><country name="Croatie"><noRegion><name sortKey="Prester, D Dominis" sort="Prester, D Dominis" uniqKey="Prester D" first="D. Dominis" last="Prester">D. Dominis Prester</name></noRegion></country><country name="Autriche"><region name="Vienne (Autriche)"><name sortKey="Donatowicz, J" sort="Donatowicz, J" uniqKey="Donatowicz J" first="J." last="Donatowicz">J. Donatowicz</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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