Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
Identifieur interne : 000D50 ( Istex/Curation ); précédent : 000D49; suivant : 000D51Difference 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.
English descriptors
- KwdEn :
- 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.
- 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:
DOI: 10.1111/j.1365-2966.2009.15098.x
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K. Horne<affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews, KY16 9SS</mods:affiliation><wicri:noCountry code="subField">9SS</wicri:noCountry></affiliation><affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews, KY16 9SS</mods:affiliation><wicri:noCountry code="subField">9SS</wicri:noCountry></affiliation>Le document en format XML
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Albrow</name><affiliation wicri:level="1"><mods:affiliation>Beatrice Tinsley Institute, Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand</mods:affiliation><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></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: michael.albrow@canterbury.ac.nz</mods:affiliation><country wicri:rule="url">Nouvelle-Zélande</country></affiliation></author><author><name sortKey="Horne, K" sort="Horne, K" uniqKey="Horne K" first="K." last="Horne">K. 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Kubas</name><affiliation wicri:level="1"><mods:affiliation>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile</mods:affiliation><country xml:lang="fr">Chili</country><wicri:regionArea>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago</wicri:regionArea></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="1"><mods:affiliation>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France</mods:affiliation><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></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"><mods:affiliation>Beatrice Tinsley Institute, Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand</mods:affiliation><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></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="1"><mods:affiliation>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA</mods:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218</wicri:regionArea></affiliation></author><author><name sortKey="Tsapras, Y" sort="Tsapras, Y" uniqKey="Tsapras Y" first="Y." last="Tsapras">Y. Tsapras</name><affiliation wicri:level="1"><mods:affiliation>Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA</mods:affiliation><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></affiliation><affiliation><mods:affiliation>Astrophysics Research Institute, Liverpool John Moores University, Liverpool CH41 1LD</mods:affiliation><wicri:noCountry code="subField">1LD</wicri:noCountry></affiliation></author><author><name sortKey="Wambsganss, J" sort="Wambsganss, J" uniqKey="Wambsganss J" first="J." last="Wambsganss">J. Wambsganss</name><affiliation wicri:level="1"><mods:affiliation>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg, Germany</mods:affiliation><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></affiliation></author><author><name sortKey="Zub, M" sort="Zub, M" uniqKey="Zub M" first="M." last="Zub">M. Zub</name><affiliation wicri:level="1"><mods:affiliation>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg, Germany</mods:affiliation><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></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:47D7065FE5601F3E5B7E324BF6189A1AD3FE2D28</idno><date when="2009" year="2009">2009</date><idno type="doi">10.1111/j.1365-2966.2009.15098.x</idno><idno type="url">https://api.istex.fr/document/47D7065FE5601F3E5B7E324BF6189A1AD3FE2D28/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000D50</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000D50</idno><idno type="wicri:Area/Istex/Curation">000D50</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main">Difference imaging photometry of blended gravitational microlensing events with a numerical kernel</title><author><name sortKey="Albrow, M D" sort="Albrow, M D" uniqKey="Albrow M" first="M. D." last="Albrow">M. D. Albrow</name><affiliation wicri:level="1"><mods:affiliation>Beatrice Tinsley Institute, Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand</mods:affiliation><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></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: michael.albrow@canterbury.ac.nz</mods:affiliation><country wicri:rule="url">Nouvelle-Zélande</country></affiliation></author><author><name sortKey="Horne, K" sort="Horne, K" uniqKey="Horne K" first="K." last="Horne">K. Horne</name><affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews, KY16 9SS</mods:affiliation><wicri:noCountry code="subField">9SS</wicri:noCountry></affiliation></author><author><name sortKey="Bramich, D M" sort="Bramich, D M" uniqKey="Bramich D" first="D. M." last="Bramich">D. M. Bramich</name><affiliation wicri:level="1"><mods:affiliation>Isaac Newton Group of Telescopes, Apartado de Correos 321, E‐38700 Santa Cruz de la Palma, Canary Islands, Spain</mods:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Isaac Newton Group of Telescopes, Apartado de Correos 321, E‐38700 Santa Cruz de la Palma, Canary Islands</wicri:regionArea></affiliation></author><author><name sortKey="Fouque, P" sort="Fouque, P" uniqKey="Fouque P" first="P." last="Fouqué">P. Fouqué</name><affiliation wicri:level="1"><mods:affiliation>LATT, Universite de Toulouse, CNRS, 14 avenue Edouard Belin, F‐31400 Toulouse, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>LATT, Universite de Toulouse, CNRS, 14 avenue Edouard Belin, F‐31400 Toulouse</wicri:regionArea></affiliation></author><author><name sortKey="Miller, V R" sort="Miller, V R" uniqKey="Miller V" first="V. R." last="Miller">V. R. Miller</name><affiliation wicri:level="1"><mods:affiliation>Beatrice Tinsley Institute, Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand</mods:affiliation><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></affiliation></author><author><name sortKey="Beaulieu, J" sort="Beaulieu, J" uniqKey="Beaulieu J" first="J." last="Beaulieu">J. Beaulieu</name><affiliation wicri:level="1"><mods:affiliation>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France</mods:affiliation><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></affiliation></author><author><name sortKey="Coutures, C" sort="Coutures, C" uniqKey="Coutures C" first="C." last="Coutures">C. Coutures</name><affiliation wicri:level="1"><mods:affiliation>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France</mods:affiliation><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></affiliation><affiliation wicri:level="1"><mods:affiliation>CEA, DSM, DAPNIA, Centre d'Études de Saclay, 91191 Gif‐sur‐Yvette Cedex, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>CEA, DSM, DAPNIA, Centre d'Études de Saclay, 91191 Gif‐sur‐Yvette Cedex</wicri:regionArea></affiliation></author><author><name sortKey="Menzies, J" sort="Menzies, J" uniqKey="Menzies J" first="J." last="Menzies">J. Menzies</name><affiliation wicri:level="1"><mods:affiliation>South African Astronomical Observatory, PO Box 9, 7935 Observatory, South Africa</mods:affiliation><country xml:lang="fr">Afrique du Sud</country><wicri:regionArea>South African Astronomical Observatory, PO Box 9, 7935 Observatory</wicri:regionArea></affiliation></author><author><name sortKey="Williams, A" sort="Williams, A" uniqKey="Williams A" first="A." last="Williams">A. Williams</name><affiliation wicri:level="1"><mods:affiliation>Perth Observatory, Walnut Road, Bickley, Perth 6076, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Perth Observatory, Walnut Road, Bickley, Perth 6076</wicri:regionArea></affiliation></author><author><name sortKey="Batista, V" sort="Batista, V" uniqKey="Batista V" first="V." last="Batista">V. Batista</name><affiliation wicri:level="1"><mods:affiliation>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France</mods:affiliation><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></affiliation></author><author><name sortKey="Bennett, D P" sort="Bennett, D P" uniqKey="Bennett D" first="D. P." last="Bennett">D. P. Bennett</name><affiliation wicri:level="1"><mods:affiliation>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall, Notre Dame, IN 46556, USA</mods:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall, Notre Dame, IN 46556</wicri:regionArea></affiliation></author><author><name sortKey="Brillant, S" sort="Brillant, S" uniqKey="Brillant S" first="S." last="Brillant">S. Brillant</name><affiliation wicri:level="1"><mods:affiliation>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile</mods:affiliation><country xml:lang="fr">Chili</country><wicri:regionArea>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago</wicri:regionArea></affiliation></author><author><name sortKey="Cassan, A" sort="Cassan, A" uniqKey="Cassan A" first="A." last="Cassan">A. Cassan</name><affiliation wicri:level="1"><mods:affiliation>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg, Germany</mods:affiliation><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></affiliation></author><author><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><affiliation wicri:level="1"><mods:affiliation>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France</mods:affiliation><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></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"><mods:affiliation>Department of Physics, University of Rijeka, Omladinska 14, 51000 Rijeka, Croatia</mods:affiliation><country xml:lang="fr">Croatie</country><wicri:regionArea>Department of Physics, University of Rijeka, Omladinska 14, 51000 Rijeka</wicri:regionArea></affiliation></author><author><name sortKey="Donatowicz, J" sort="Donatowicz, J" uniqKey="Donatowicz J" first="J." last="Donatowicz">J. Donatowicz</name><affiliation wicri:level="1"><mods:affiliation>Technical University of Vienna, Department of Computing, Wiedner Hauptstrasse 10, Vienna, Austria</mods:affiliation><country xml:lang="fr">Autriche</country><wicri:regionArea>Technical University of Vienna, Department of Computing, Wiedner Hauptstrasse 10, Vienna</wicri:regionArea></affiliation></author><author><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name><affiliation wicri:level="1"><mods:affiliation>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart, Tasmania 7001, Australia</mods:affiliation><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></affiliation></author><author><name sortKey="Kains, N" sort="Kains, N" uniqKey="Kains N" first="N." last="Kains">N. Kains</name><affiliation><mods:affiliation>SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews, KY16 9SS</mods: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="1"><mods:affiliation>NASA Exoplanet Science Institute, Caltech, MS 100‐22, 770 South Wilson Avenue Pasadena, CA 91125, USA</mods:affiliation><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></affiliation></author><author><name sortKey="Kubas, D" sort="Kubas, D" uniqKey="Kubas D" first="D." last="Kubas">D. Kubas</name><affiliation wicri:level="1"><mods:affiliation>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile</mods:affiliation><country xml:lang="fr">Chili</country><wicri:regionArea>European Southern Observatory, Casilla 19001, Vitacura 19, Santiago</wicri:regionArea></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="1"><mods:affiliation>Institut dAstrophysique de Paris, CNRS ‐ UMR 7095, Universite Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France</mods:affiliation><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></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"><mods:affiliation>Beatrice Tinsley Institute, Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand</mods:affiliation><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></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="1"><mods:affiliation>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA</mods:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218</wicri:regionArea></affiliation></author><author><name sortKey="Tsapras, Y" sort="Tsapras, Y" uniqKey="Tsapras Y" first="Y." last="Tsapras">Y. Tsapras</name><affiliation wicri:level="1"><mods:affiliation>Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA</mods:affiliation><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></affiliation><affiliation><mods:affiliation>Astrophysics Research Institute, Liverpool John Moores University, Liverpool CH41 1LD</mods:affiliation></affiliation></author><author><name sortKey="Wambsganss, J" sort="Wambsganss, J" uniqKey="Wambsganss J" first="J." last="Wambsganss">J. Wambsganss</name><affiliation wicri:level="1"><mods:affiliation>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg, Germany</mods:affiliation><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></affiliation></author><author><name sortKey="Zub, M" sort="Zub, M" uniqKey="Zub M" first="M." last="Zub">M. Zub</name><affiliation wicri:level="1"><mods:affiliation>Astronomisches Rechen‐Institut (ARI), Zentrum fur Astronomie (ZAH), Heidelberg University, Monchhofstrasse 12‐14, 69120 Heidelberg, Germany</mods:affiliation><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></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>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="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></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></record>Pour manipuler ce document sous Unix (Dilib)
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