Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050
Identifieur interne : 003638 ( PascalFrancis/Curation ); précédent : 003637; suivant : 003639Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050
Auteurs : V. Batista [France] ; S. Dong [États-Unis] ; A. Gould [États-Unis] ; J. P. Beaulieu [France] ; A. Cassan [Allemagne] ; G. W. Christie [Nouvelle-Zélande] ; C. Han ; A. Udalski [Pologne] ; W. Allen ; D. L. Depoy [États-Unis] ; A. Gal-Yam ; B. S. Gaudi [États-Unis] ; B. Johnson ; S. Kaspi ; C. U. Lee ; D. Maoz ; J. Mccormick ; I. Mcgreer ; B. Monard ; T. Natusch ; E. Ofek ; B.-G. Park ; R. W. Pogge [États-Unis] ; D. Polishook ; A. Shporer ; M. D. Albrow [Nouvelle-Zélande] ; D. P. Bennett [États-Unis] ; S. Brillant [Chili] ; M. Bode [Royaume-Uni] ; D. M. Bramich [Espagne] ; M. Burgdor ; J. A. R. Caldwemm [États-Unis] ; H. Calitz [Afrique du Sud] ; A. Cole [Australie] ; K. H. Cook [États-Unis] ; Ch. Coutures [France] ; S. Dieters [France, Australie] ; M. Dominik [Royaume-Uni] ; D. D. Prester [Croatie] ; J. Donatowicz [Autriche] ; P. Fouque [France] ; J. Greenhill [Australie] ; M. Hoffman [Afrique du Sud] ; K. Horne [Royaume-Uni] ; U. G. J Rgensen [Danemark] ; N. Kains [Royaume-Uni] ; S. Kane [États-Unis] ; D. Kubas [France, Chili] ; J. B. Marquette [France] ; R. Martin [Australie] ; P. Meintjes [Afrique du Sud] ; J. Menzies [Afrique du Sud] ; K. R. Pollard [Nouvelle-Zélande] ; K. C. Sahu [États-Unis] ; C. Snodgrass [Chili] ; I. Steele [Royaume-Uni] ; Y. Tsapras [Royaume-Uni] ; J. Wambsganss [Allemagne] ; A. Williams [Australie] ; M. Zub [Allemagne]Source :
- Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2009.
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Abstract
Aims. We analyze OGLE-2007-BLG-050, a high magnification microlensing event (A ∼ 432) whose peak occurred on 2 May, 2007, with pronounced finite-source and parallax effects. We compute planet detection efficiencies for this event in order to determine its sensitivity to the presence of planets around the lens star. Methods. Both finite-source and parallax effects permit a measurement of the angular Einstein radius θE = 0.48 ± 0.01 mas and the parallax πE = 0.12 ± 0.03, leading to an estimate of the lens mass M = 0.50 ± 0.14 M◦. and its distance to the observer DL = 5.5 ± 0.4 kpc. This is only the second determination of a reasonably precise (<30%) mass estimate for an isolated unseen object, using any method. This allows us to calculate the planetary detection efficiency in physical units (r⊥, mp), where r⊥ is the projected planet-star separation and mP is the planet mass. Results. When computing planet detection efficiency, we did not find any planetary signature, i.e. none of the planetary configurations provides a ΔX2 improvement higher than 60, and our detection efficiency results reveal significant sensitivity to Neptune-mass planets, and to a lesser extent Earth-mass planets in some configurations. Indeed, Jupiter and Neptune-mass planets are excluded with a high confidence for a large projected separation range between the planet and the lens star, respectively [0.6-10] and [1.4-4] AU, and Earth-mass planets are excluded with a 10% confidence in the lensing zone, i.e. [1.8-3.1] AU.
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Dong</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Gould, A" sort="Gould, A" uniqKey="Gould A" first="A." last="Gould">A. Gould</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Beaulieu, J P" sort="Beaulieu, J P" uniqKey="Beaulieu J" first="J. P." last="Beaulieu">J. P. 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Bramich</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Isaac Newton Group, Apartado de Correos 321</s1><s2>38700 Santa Cruz de La Palma</s2><s3>ESP</s3><sZ>30 aut.</sZ></inist:fA14><country>Espagne</country></affiliation></author><author><name sortKey="Burgdor, M" sort="Burgdor, M" uniqKey="Burgdor M" first="M." last="Burgdor">M. Burgdor</name></author><author><name sortKey="Caldwemm, J A R" sort="Caldwemm, J A R" uniqKey="Caldwemm J" first="J. A. R." last="Caldwemm">J. A. R. Caldwemm</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>McDonald Observatory, 16120 St Hwy Spur 78</s1><s2>Fort Davis, TX 79734</s2><s3>USA</s3><sZ>32 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Calitz, H" sort="Calitz, H" uniqKey="Calitz H" first="H." last="Calitz">H. Calitz</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></inist:fA14><country>Afrique du Sud</country></affiliation></author><author><name sortKey="Cole, A" sort="Cole, A" uniqKey="Cole A" first="A." last="Cole">A. Cole</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Cook, K H" sort="Cook, K H" uniqKey="Cook K" first="K. H." last="Cook">K. H. Cook</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Lawrence Livermore National Laboratory, IGPP, PO Box 808</s1><s2>Livermore, CA 94551</s2><s3>USA</s3><sZ>35 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Coutures, Ch" sort="Coutures, Ch" uniqKey="Coutures C" first="Ch." last="Coutures">Ch. Coutures</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>DSM/DAPNIA, CEA Saclay</s1><s2>91191 Gif-sur-Yvette</s2><s3>FRA</s3><sZ>36 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Dominik, M" sort="Dominik, M" uniqKey="Dominik M" first="M." last="Dominik">M. Dominik</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Prester, D D" sort="Prester, D D" uniqKey="Prester D" first="D. D." last="Prester">D. D. Prester</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Physics department, Faculty of Arts and Sciences, University of Rijeka</s1><s2>51000 Rijeka</s2><s3>HRV</s3><sZ>39 aut.</sZ></inist:fA14><country>Croatie</country></affiliation></author><author><name sortKey="Donatowicz, J" sort="Donatowicz, J" uniqKey="Donatowicz J" first="J." last="Donatowicz">J. Donatowicz</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Technical University of Vienna, Dept. of Computing, Wiedner Hauptstrasse 10</s1><s2>Vienna</s2><s3>AUT</s3><sZ>40 aut.</sZ></inist:fA14><country>Autriche</country></affiliation></author><author><name sortKey="Fouque, P" sort="Fouque, P" uniqKey="Fouque P" first="P." last="Fouque">P. Fouque</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Observatoire Midi-Pyrénées, UMR 5572, 14 avenue Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>41 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Hoffman, M" sort="Hoffman, M" uniqKey="Hoffman M" first="M." last="Hoffman">M. Hoffman</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></inist:fA14><country>Afrique du Sud</country></affiliation></author><author><name sortKey="Horne, K" sort="Horne, K" uniqKey="Horne K" first="K." last="Horne">K. Horne</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="J Rgensen, U G" sort="J Rgensen, U G" uniqKey="J Rgensen U" first="U. G." last="J Rgensen">U. G. J Rgensen</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>Niels Bohr Institute, Astronomical Observatory, Juliane Maries Vej 30</s1><s2>2100 Copenhagen</s2><s3>DNK</s3><sZ>45 aut.</sZ></inist:fA14><country>Danemark</country></affiliation></author><author><name sortKey="Kains, N" sort="Kains, N" uniqKey="Kains N" first="N." last="Kains">N. Kains</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Kane, S" sort="Kane, S" uniqKey="Kane S" first="S." last="Kane">S. Kane</name><affiliation wicri:level="1"><inist:fA14 i1="19"><s1>NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue Pasadena</s1><s2>CA 91125</s2><s3>USA</s3><sZ>47 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Kubas, D" sort="Kubas, D" uniqKey="Kubas D" first="D." last="Kubas">D. Kubas</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>28 aut.</sZ><sZ>48 aut.</sZ><sZ>55 aut.</sZ></inist:fA14><country>Chili</country></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"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Martin, R" sort="Martin, R" uniqKey="Martin R" first="R." last="Martin">R. Martin</name><affiliation wicri:level="1"><inist:fA14 i1="20"><s1>Perth Observatory, Walnut Road</s1><s2>Bickley, Perth 6076</s2><s3>AUS</s3><sZ>50 aut.</sZ><sZ>59 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Meintjes, P" sort="Meintjes, P" uniqKey="Meintjes P" first="P." last="Meintjes">P. Meintjes</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></inist:fA14><country>Afrique du Sud</country></affiliation></author><author><name sortKey="Menzies, J" sort="Menzies, J" uniqKey="Menzies J" first="J." last="Menzies">J. Menzies</name><affiliation wicri:level="1"><inist:fA14 i1="21"><s1>South African Astronomical Observatory, PO Box 9 Observatory 7935</s1><s3>ZAF</s3><sZ>52 aut.</sZ></inist:fA14><country>Afrique du Sud</country></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"><inist:fA14 i1="05"><s1>University of Canterbury, Department of Physics & Astronomy, Private Bag 4800</s1><s2>Christchurch</s2><s3>NZL</s3><sZ>26 aut.</sZ><sZ>53 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country></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"><inist:fA14 i1="22"><s1>Space Telescope Science Institute, 3700 San Martin Drive</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>54 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Snodgrass, C" sort="Snodgrass, C" uniqKey="Snodgrass C" first="C." last="Snodgrass">C. Snodgrass</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>28 aut.</sZ><sZ>48 aut.</sZ><sZ>55 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Steele, I" sort="Steele, I" uniqKey="Steele I" first="I." last="Steele">I. Steele</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House</s1><s2>Egerton Wharf, Birkenhead CH41 1LD</s2><s3>GBR</s3><sZ>29 aut.</sZ><sZ>56 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Tsapras, Y" sort="Tsapras, Y" uniqKey="Tsapras Y" first="Y." last="Tsapras">Y. Tsapras</name><affiliation wicri:level="1"><inist:fA14 i1="23"><s1>Astronomy Unit, School of Mathematical Sciences, Queen Mary, University of London, Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>57 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Wambsganss, J" sort="Wambsganss, J" uniqKey="Wambsganss J" first="J." last="Wambsganss">J. Wambsganss</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie, Heidelberg University, Mönchhofstr. 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>58 aut.</sZ><sZ>60 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Williams, A" sort="Williams, A" uniqKey="Williams A" first="A." last="Williams">A. Williams</name><affiliation wicri:level="1"><inist:fA14 i1="20"><s1>Perth Observatory, Walnut Road</s1><s2>Bickley, Perth 6076</s2><s3>AUS</s3><sZ>50 aut.</sZ><sZ>59 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Zub, M" sort="Zub, M" uniqKey="Zub M" first="M." last="Zub">M. Zub</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie, Heidelberg University, Mönchhofstr. 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>58 aut.</sZ><sZ>60 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">10-0031383</idno><date when="2009">2009</date><idno type="stanalyst">PASCAL 10-0031383 INIST</idno><idno type="RBID">Pascal:10-0031383</idno><idno type="wicri:Area/PascalFrancis/Corpus">002945</idno><idno type="wicri:Area/PascalFrancis/Curation">003638</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050</title><author><name sortKey="Batista, V" sort="Batista, V" uniqKey="Batista V" first="V." last="Batista">V. Batista</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Dong, S" sort="Dong, S" uniqKey="Dong S" first="S." last="Dong">S. Dong</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Gould, A" sort="Gould, A" uniqKey="Gould A" first="A." last="Gould">A. Gould</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Beaulieu, J P" sort="Beaulieu, J P" uniqKey="Beaulieu J" first="J. P." last="Beaulieu">J. P. Beaulieu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Cassan, A" sort="Cassan, A" uniqKey="Cassan A" first="A." last="Cassan">A. Cassan</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie, Heidelberg University, Mönchhofstr. 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>58 aut.</sZ><sZ>60 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Christie, G W" sort="Christie, G W" uniqKey="Christie G" first="G. W." last="Christie">G. W. Christie</name><affiliation wicri:level="1"><inist:fA14 i1="25"><s1>Auckland Observatory</s1><s2>Auckland</s2><s3>NZL</s3><sZ>6 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country></affiliation></author><author><name sortKey="Han, C" sort="Han, C" uniqKey="Han C" first="C." last="Han">C. Han</name></author><author><name sortKey="Udalski, A" sort="Udalski, A" uniqKey="Udalski A" first="A." last="Udalski">A. Udalski</name><affiliation wicri:level="1"><inist:fA14 i1="24"><s1>Warsaw University Observatory, A1. Ujazdowskie 4</s1><s2>00-478 Warszawa</s2><s3>POL</s3><sZ>8 aut.</sZ></inist:fA14><country>Pologne</country></affiliation></author><author><name sortKey="Allen, W" sort="Allen, W" uniqKey="Allen W" first="W." last="Allen">W. Allen</name></author><author><name sortKey="Depoy, D L" sort="Depoy, D L" uniqKey="Depoy D" first="D. L." last="Depoy">D. L. Depoy</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Gal Yam, A" sort="Gal Yam, A" uniqKey="Gal Yam A" first="A." last="Gal-Yam">A. Gal-Yam</name></author><author><name sortKey="Gaudi, B S" sort="Gaudi, B S" uniqKey="Gaudi B" first="B. S." last="Gaudi">B. S. Gaudi</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Johnson, B" sort="Johnson, B" uniqKey="Johnson B" first="B." last="Johnson">B. Johnson</name></author><author><name sortKey="Kaspi, S" sort="Kaspi, S" uniqKey="Kaspi S" first="S." last="Kaspi">S. Kaspi</name></author><author><name sortKey="Lee, C U" sort="Lee, C U" uniqKey="Lee C" first="C. U." last="Lee">C. U. Lee</name></author><author><name sortKey="Maoz, D" sort="Maoz, D" uniqKey="Maoz D" first="D." last="Maoz">D. Maoz</name></author><author><name sortKey="Mccormick, J" sort="Mccormick, J" uniqKey="Mccormick J" first="J." last="Mccormick">J. Mccormick</name></author><author><name sortKey="Mcgreer, I" sort="Mcgreer, I" uniqKey="Mcgreer I" first="I." last="Mcgreer">I. Mcgreer</name></author><author><name sortKey="Monard, B" sort="Monard, B" uniqKey="Monard B" first="B." last="Monard">B. Monard</name></author><author><name sortKey="Natusch, T" sort="Natusch, T" uniqKey="Natusch T" first="T." last="Natusch">T. Natusch</name></author><author><name sortKey="Ofek, E" sort="Ofek, E" uniqKey="Ofek E" first="E." last="Ofek">E. Ofek</name></author><author><name sortKey="Park, B G" sort="Park, B G" uniqKey="Park B" first="B.-G." last="Park">B.-G. Park</name></author><author><name sortKey="Pogge, R W" sort="Pogge, R W" uniqKey="Pogge R" first="R. W." last="Pogge">R. W. Pogge</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Polishook, D" sort="Polishook, D" uniqKey="Polishook D" first="D." last="Polishook">D. Polishook</name></author><author><name sortKey="Shporer, A" sort="Shporer, A" uniqKey="Shporer A" first="A." last="Shporer">A. Shporer</name></author><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"><inist:fA14 i1="05"><s1>University of Canterbury, Department of Physics & Astronomy, Private Bag 4800</s1><s2>Christchurch</s2><s3>NZL</s3><sZ>26 aut.</sZ><sZ>53 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country></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"><inist:fA14 i1="04"><s1>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall</s1><s2>Notre Dame, IN 46556</s2><s3>USA</s3><sZ>27 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Brillant, S" sort="Brillant, S" uniqKey="Brillant S" first="S." last="Brillant">S. Brillant</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>28 aut.</sZ><sZ>48 aut.</sZ><sZ>55 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Bode, M" sort="Bode, M" uniqKey="Bode M" first="M." last="Bode">M. Bode</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House</s1><s2>Egerton Wharf, Birkenhead CH41 1LD</s2><s3>GBR</s3><sZ>29 aut.</sZ><sZ>56 aut.</sZ></inist:fA14><country>Royaume-Uni</country></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"><inist:fA14 i1="08"><s1>Isaac Newton Group, Apartado de Correos 321</s1><s2>38700 Santa Cruz de La Palma</s2><s3>ESP</s3><sZ>30 aut.</sZ></inist:fA14><country>Espagne</country></affiliation></author><author><name sortKey="Burgdor, M" sort="Burgdor, M" uniqKey="Burgdor M" first="M." last="Burgdor">M. Burgdor</name></author><author><name sortKey="Caldwemm, J A R" sort="Caldwemm, J A R" uniqKey="Caldwemm J" first="J. A. R." last="Caldwemm">J. A. R. Caldwemm</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>McDonald Observatory, 16120 St Hwy Spur 78</s1><s2>Fort Davis, TX 79734</s2><s3>USA</s3><sZ>32 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Calitz, H" sort="Calitz, H" uniqKey="Calitz H" first="H." last="Calitz">H. Calitz</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></inist:fA14><country>Afrique du Sud</country></affiliation></author><author><name sortKey="Cole, A" sort="Cole, A" uniqKey="Cole A" first="A." last="Cole">A. Cole</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Cook, K H" sort="Cook, K H" uniqKey="Cook K" first="K. H." last="Cook">K. H. Cook</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Lawrence Livermore National Laboratory, IGPP, PO Box 808</s1><s2>Livermore, CA 94551</s2><s3>USA</s3><sZ>35 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Coutures, Ch" sort="Coutures, Ch" uniqKey="Coutures C" first="Ch." last="Coutures">Ch. Coutures</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>DSM/DAPNIA, CEA Saclay</s1><s2>91191 Gif-sur-Yvette</s2><s3>FRA</s3><sZ>36 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Dominik, M" sort="Dominik, M" uniqKey="Dominik M" first="M." last="Dominik">M. Dominik</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Prester, D D" sort="Prester, D D" uniqKey="Prester D" first="D. D." last="Prester">D. D. Prester</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Physics department, Faculty of Arts and Sciences, University of Rijeka</s1><s2>51000 Rijeka</s2><s3>HRV</s3><sZ>39 aut.</sZ></inist:fA14><country>Croatie</country></affiliation></author><author><name sortKey="Donatowicz, J" sort="Donatowicz, J" uniqKey="Donatowicz J" first="J." last="Donatowicz">J. Donatowicz</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Technical University of Vienna, Dept. of Computing, Wiedner Hauptstrasse 10</s1><s2>Vienna</s2><s3>AUT</s3><sZ>40 aut.</sZ></inist:fA14><country>Autriche</country></affiliation></author><author><name sortKey="Fouque, P" sort="Fouque, P" uniqKey="Fouque P" first="P." last="Fouque">P. Fouque</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Observatoire Midi-Pyrénées, UMR 5572, 14 avenue Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>41 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Hoffman, M" sort="Hoffman, M" uniqKey="Hoffman M" first="M." last="Hoffman">M. Hoffman</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></inist:fA14><country>Afrique du Sud</country></affiliation></author><author><name sortKey="Horne, K" sort="Horne, K" uniqKey="Horne K" first="K." last="Horne">K. Horne</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="J Rgensen, U G" sort="J Rgensen, U G" uniqKey="J Rgensen U" first="U. G." last="J Rgensen">U. G. J Rgensen</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>Niels Bohr Institute, Astronomical Observatory, Juliane Maries Vej 30</s1><s2>2100 Copenhagen</s2><s3>DNK</s3><sZ>45 aut.</sZ></inist:fA14><country>Danemark</country></affiliation></author><author><name sortKey="Kains, N" sort="Kains, N" uniqKey="Kains N" first="N." last="Kains">N. Kains</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Kane, S" sort="Kane, S" uniqKey="Kane S" first="S." last="Kane">S. Kane</name><affiliation wicri:level="1"><inist:fA14 i1="19"><s1>NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue Pasadena</s1><s2>CA 91125</s2><s3>USA</s3><sZ>47 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Kubas, D" sort="Kubas, D" uniqKey="Kubas D" first="D." last="Kubas">D. Kubas</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>28 aut.</sZ><sZ>48 aut.</sZ><sZ>55 aut.</sZ></inist:fA14><country>Chili</country></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"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Martin, R" sort="Martin, R" uniqKey="Martin R" first="R." last="Martin">R. Martin</name><affiliation wicri:level="1"><inist:fA14 i1="20"><s1>Perth Observatory, Walnut Road</s1><s2>Bickley, Perth 6076</s2><s3>AUS</s3><sZ>50 aut.</sZ><sZ>59 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Meintjes, P" sort="Meintjes, P" uniqKey="Meintjes P" first="P." last="Meintjes">P. Meintjes</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></inist:fA14><country>Afrique du Sud</country></affiliation></author><author><name sortKey="Menzies, J" sort="Menzies, J" uniqKey="Menzies J" first="J." last="Menzies">J. Menzies</name><affiliation wicri:level="1"><inist:fA14 i1="21"><s1>South African Astronomical Observatory, PO Box 9 Observatory 7935</s1><s3>ZAF</s3><sZ>52 aut.</sZ></inist:fA14><country>Afrique du Sud</country></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"><inist:fA14 i1="05"><s1>University of Canterbury, Department of Physics & Astronomy, Private Bag 4800</s1><s2>Christchurch</s2><s3>NZL</s3><sZ>26 aut.</sZ><sZ>53 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country></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"><inist:fA14 i1="22"><s1>Space Telescope Science Institute, 3700 San Martin Drive</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>54 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Snodgrass, C" sort="Snodgrass, C" uniqKey="Snodgrass C" first="C." last="Snodgrass">C. Snodgrass</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>28 aut.</sZ><sZ>48 aut.</sZ><sZ>55 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Steele, I" sort="Steele, I" uniqKey="Steele I" first="I." last="Steele">I. Steele</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House</s1><s2>Egerton Wharf, Birkenhead CH41 1LD</s2><s3>GBR</s3><sZ>29 aut.</sZ><sZ>56 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Tsapras, Y" sort="Tsapras, Y" uniqKey="Tsapras Y" first="Y." last="Tsapras">Y. Tsapras</name><affiliation wicri:level="1"><inist:fA14 i1="23"><s1>Astronomy Unit, School of Mathematical Sciences, Queen Mary, University of London, Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>57 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Wambsganss, J" sort="Wambsganss, J" uniqKey="Wambsganss J" first="J." last="Wambsganss">J. Wambsganss</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie, Heidelberg University, Mönchhofstr. 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>58 aut.</sZ><sZ>60 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Williams, A" sort="Williams, A" uniqKey="Williams A" first="A." last="Williams">A. Williams</name><affiliation wicri:level="1"><inist:fA14 i1="20"><s1>Perth Observatory, Walnut Road</s1><s2>Bickley, Perth 6076</s2><s3>AUS</s3><sZ>50 aut.</sZ><sZ>59 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Zub, M" sort="Zub, M" uniqKey="Zub M" first="M." last="Zub">M. Zub</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie, Heidelberg University, Mönchhofstr. 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>58 aut.</sZ><sZ>60 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author></analytic><series><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Earth planet</term><term>Gravitational lensing</term><term>Jupiter planet</term><term>Mass measurement</term><term>Microlenses</term><term>Neptune planet</term><term>Planetary system</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Mesure masse</term><term>Microlentille</term><term>Planète Neptune</term><term>Planète Terre</term><term>Planète Jupiter</term><term>Mirage gravitationnel</term><term>Système planétaire</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Aims. We analyze OGLE-2007-BLG-050, a high magnification microlensing event (A ∼ 432) whose peak occurred on 2 May, 2007, with pronounced finite-source and parallax effects. We compute planet detection efficiencies for this event in order to determine its sensitivity to the presence of planets around the lens star. Methods. Both finite-source and parallax effects permit a measurement of the angular Einstein radius θ<sub>E</sub> = 0.48 ± 0.01 mas and the parallax π<sub>E</sub> = 0.12 ± 0.03, leading to an estimate of the lens mass M = 0.50 ± 0.14 M<sub>◦.</sub> and its distance to the observer D<sub>L</sub> = 5.5 ± 0.4 kpc. This is only the second determination of a reasonably precise (<30%) mass estimate for an isolated unseen object, using any method. This allows us to calculate the planetary detection efficiency in physical units (r⊥, m<sub>p</sub>), where r⊥ is the projected planet-star separation and m<sub>P</sub> is the planet mass. Results. When computing planet detection efficiency, we did not find any planetary signature, i.e. none of the planetary configurations provides a Δ<sub>X</sub><sup>2</sup> improvement higher than 60, and our detection efficiency results reveal significant sensitivity to Neptune-mass planets, and to a lesser extent Earth-mass planets in some configurations. Indeed, Jupiter and Neptune-mass planets are excluded with a high confidence for a large projected separation range between the planet and the lens star, respectively [0.6-10] and [1.4-4] AU, and Earth-mass planets are excluded with a 10% confidence in the lensing zone, i.e. [1.8-3.1] AU.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0004-6361</s0></fA01><fA02 i1="01"><s0>AAEJAF</s0></fA02><fA03 i2="1"><s0>Astron. astrophys. : (Berl., Print)</s0></fA03><fA05><s2>508</s2></fA05><fA06><s2>1</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050</s1></fA08><fA11 i1="01" i2="1"><s1>BATISTA (V.)</s1></fA11><fA11 i1="02" i2="1"><s1>DONG (S.)</s1></fA11><fA11 i1="03" i2="1"><s1>GOULD (A.)</s1></fA11><fA11 i1="04" i2="1"><s1>BEAULIEU (J. P.)</s1></fA11><fA11 i1="05" i2="1"><s1>CASSAN (A.)</s1></fA11><fA11 i1="06" i2="1"><s1>CHRISTIE (G. W.)</s1></fA11><fA11 i1="07" i2="1"><s1>HAN (C.)</s1></fA11><fA11 i1="08" i2="1"><s1>UDALSKI (A.)</s1></fA11><fA11 i1="09" i2="1"><s1>ALLEN (W.)</s1></fA11><fA11 i1="10" i2="1"><s1>DEPOY (D. L.)</s1></fA11><fA11 i1="11" i2="1"><s1>GAL-YAM (A.)</s1></fA11><fA11 i1="12" i2="1"><s1>GAUDI (B. S.)</s1></fA11><fA11 i1="13" i2="1"><s1>JOHNSON (B.)</s1></fA11><fA11 i1="14" i2="1"><s1>KASPI (S.)</s1></fA11><fA11 i1="15" i2="1"><s1>LEE (C. U.)</s1></fA11><fA11 i1="16" i2="1"><s1>MAOZ (D.)</s1></fA11><fA11 i1="17" i2="1"><s1>MCCORMICK (J.)</s1></fA11><fA11 i1="18" i2="1"><s1>MCGREER (I.)</s1></fA11><fA11 i1="19" i2="1"><s1>MONARD (B.)</s1></fA11><fA11 i1="20" i2="1"><s1>NATUSCH (T.)</s1></fA11><fA11 i1="21" i2="1"><s1>OFEK (E.)</s1></fA11><fA11 i1="22" i2="1"><s1>PARK (B.-G.)</s1></fA11><fA11 i1="23" i2="1"><s1>POGGE (R. W.)</s1></fA11><fA11 i1="24" i2="1"><s1>POLISHOOK (D.)</s1></fA11><fA11 i1="25" i2="1"><s1>SHPORER (A.)</s1></fA11><fA11 i1="26" i2="1"><s1>ALBROW (M. D.)</s1></fA11><fA11 i1="27" i2="1"><s1>BENNETT (D. P.)</s1></fA11><fA11 i1="28" i2="1"><s1>BRILLANT (S.)</s1></fA11><fA11 i1="29" i2="1"><s1>BODE (M.)</s1></fA11><fA11 i1="30" i2="1"><s1>BRAMICH (D. M.)</s1></fA11><fA11 i1="31" i2="1"><s1>BURGDOR (M.)</s1></fA11><fA11 i1="32" i2="1"><s1>CALDWEMM (J. A. R.)</s1></fA11><fA11 i1="33" i2="1"><s1>CALITZ (H.)</s1></fA11><fA11 i1="34" i2="1"><s1>COLE (A.)</s1></fA11><fA11 i1="35" i2="1"><s1>COOK (K. H.)</s1></fA11><fA11 i1="36" i2="1"><s1>COUTURES (Ch.)</s1></fA11><fA11 i1="37" i2="1"><s1>DIETERS (S.)</s1></fA11><fA11 i1="38" i2="1"><s1>DOMINIK (M.)</s1></fA11><fA11 i1="39" i2="1"><s1>PRESTER (D. D.)</s1></fA11><fA11 i1="40" i2="1"><s1>DONATOWICZ (J.)</s1></fA11><fA11 i1="41" i2="1"><s1>FOUQUE (P.)</s1></fA11><fA11 i1="42" i2="1"><s1>GREENHILL (J.)</s1></fA11><fA11 i1="43" i2="1"><s1>HOFFMAN (M.)</s1></fA11><fA11 i1="44" i2="1"><s1>HORNE (K.)</s1></fA11><fA11 i1="45" i2="1"><s1>JØRGENSEN (U. G.)</s1></fA11><fA11 i1="46" i2="1"><s1>KAINS (N.)</s1></fA11><fA11 i1="47" i2="1"><s1>KANE (S.)</s1></fA11><fA11 i1="48" i2="1"><s1>KUBAS (D.)</s1></fA11><fA11 i1="49" i2="1"><s1>MARQUETTE (J. B.)</s1></fA11><fA11 i1="50" i2="1"><s1>MARTIN (R.)</s1></fA11><fA11 i1="51" i2="1"><s1>MEINTJES (P.)</s1></fA11><fA11 i1="52" i2="1"><s1>MENZIES (J.)</s1></fA11><fA11 i1="53" i2="1"><s1>POLLARD (K. R.)</s1></fA11><fA11 i1="54" i2="1"><s1>SAHU (K. C.)</s1></fA11><fA11 i1="55" i2="1"><s1>SNODGRASS (C.)</s1></fA11><fA11 i1="56" i2="1"><s1>STEELE (I.)</s1></fA11><fA11 i1="57" i2="1"><s1>TSAPRAS (Y.)</s1></fA11><fA11 i1="58" i2="1"><s1>WAMBSGANSS (J.)</s1></fA11><fA11 i1="59" i2="1"><s1>WILLIAMS (A.)</s1></fA11><fA11 i1="60" i2="1"><s1>ZUB (M.)</s1></fA11><fA14 i1="01"><s1>Institut d'Astrophysique de Paris, INSU-CNRS, 98 bis Boulevard Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>37 aut.</sZ><sZ>48 aut.</sZ><sZ>49 aut.</sZ></fA14><fA14 i1="02"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>10 aut.</sZ><sZ>12 aut.</sZ><sZ>23 aut.</sZ></fA14><fA14 i1="03"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie, Heidelberg University, Mönchhofstr. 12-14</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>5 aut.</sZ><sZ>58 aut.</sZ><sZ>60 aut.</sZ></fA14><fA14 i1="04"><s1>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall</s1><s2>Notre Dame, IN 46556</s2><s3>USA</s3><sZ>27 aut.</sZ></fA14><fA14 i1="05"><s1>University of Canterbury, Department of Physics & Astronomy, Private Bag 4800</s1><s2>Christchurch</s2><s3>NZL</s3><sZ>26 aut.</sZ><sZ>53 aut.</sZ></fA14><fA14 i1="06"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>28 aut.</sZ><sZ>48 aut.</sZ><sZ>55 aut.</sZ></fA14><fA14 i1="07"><s1>Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House</s1><s2>Egerton Wharf, Birkenhead CH41 1LD</s2><s3>GBR</s3><sZ>29 aut.</sZ><sZ>56 aut.</sZ></fA14><fA14 i1="08"><s1>Isaac Newton Group, Apartado de Correos 321</s1><s2>38700 Santa Cruz de La Palma</s2><s3>ESP</s3><sZ>30 aut.</sZ></fA14><fA14 i1="09"><s1>McDonald Observatory, 16120 St Hwy Spur 78</s1><s2>Fort Davis, TX 79734</s2><s3>USA</s3><sZ>32 aut.</sZ></fA14><fA14 i1="10"><s1>Dept. of Physics/Boyden Observatory, University of the Free State</s1><s2>Bloemfontein 9300</s2><s3>ZAF</s3><sZ>33 aut.</sZ><sZ>43 aut.</sZ><sZ>51 aut.</sZ></fA14><fA14 i1="11"><s1>Lawrence Livermore National Laboratory, IGPP, PO Box 808</s1><s2>Livermore, CA 94551</s2><s3>USA</s3><sZ>35 aut.</sZ></fA14><fA14 i1="12"><s1>DSM/DAPNIA, CEA Saclay</s1><s2>91191 Gif-sur-Yvette</s2><s3>FRA</s3><sZ>36 aut.</sZ></fA14><fA14 i1="13"><s1>University of Tasmania, School of Maths and Physics, Private bag 37, GPO Hobart</s1><s2>Tasmania 7001</s2><s3>AUS</s3><sZ>34 aut.</sZ><sZ>37 aut.</sZ><sZ>42 aut.</sZ></fA14><fA14 i1="14"><s1>SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh</s1><s2>St Andrews, KY16 9SS</s2><s3>GBR</s3><sZ>38 aut.</sZ><sZ>44 aut.</sZ><sZ>46 aut.</sZ></fA14><fA14 i1="15"><s1>Physics department, Faculty of Arts and Sciences, University of Rijeka</s1><s2>51000 Rijeka</s2><s3>HRV</s3><sZ>39 aut.</sZ></fA14><fA14 i1="16"><s1>Technical University of Vienna, Dept. of Computing, Wiedner Hauptstrasse 10</s1><s2>Vienna</s2><s3>AUT</s3><sZ>40 aut.</sZ></fA14><fA14 i1="17"><s1>Observatoire Midi-Pyrénées, UMR 5572, 14 avenue Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>41 aut.</sZ></fA14><fA14 i1="18"><s1>Niels Bohr Institute, Astronomical Observatory, Juliane Maries Vej 30</s1><s2>2100 Copenhagen</s2><s3>DNK</s3><sZ>45 aut.</sZ></fA14><fA14 i1="19"><s1>NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue Pasadena</s1><s2>CA 91125</s2><s3>USA</s3><sZ>47 aut.</sZ></fA14><fA14 i1="20"><s1>Perth Observatory, Walnut Road</s1><s2>Bickley, Perth 6076</s2><s3>AUS</s3><sZ>50 aut.</sZ><sZ>59 aut.</sZ></fA14><fA14 i1="21"><s1>South African Astronomical Observatory, PO Box 9 Observatory 7935</s1><s3>ZAF</s3><sZ>52 aut.</sZ></fA14><fA14 i1="22"><s1>Space Telescope Science Institute, 3700 San Martin Drive</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>54 aut.</sZ></fA14><fA14 i1="23"><s1>Astronomy Unit, School of Mathematical Sciences, Queen Mary, University of London, Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>57 aut.</sZ></fA14><fA14 i1="24"><s1>Warsaw University Observatory, A1. Ujazdowskie 4</s1><s2>00-478 Warszawa</s2><s3>POL</s3><sZ>8 aut.</sZ></fA14><fA14 i1="25"><s1>Auckland Observatory</s1><s2>Auckland</s2><s3>NZL</s3><sZ>6 aut.</sZ></fA14><fA17 i1="01" i2="1"><s1>The μFUN Collaboration</s1><s3>INC</s3></fA17><fA20><s1>467-478</s1></fA20><fA21><s1>2009</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>14176</s2><s5>354000171541550490</s5></fA43><fA44><s0>0000</s0><s1>© 2010 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1/4 p.</s0></fA45><fA47 i1="01" i2="1"><s0>10-0031383</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Astronomy and astrophysics : (Berlin. Print)</s0></fA64><fA66 i1="01"><s0>FRA</s0></fA66><fC01 i1="01" l="ENG"><s0>Aims. We analyze OGLE-2007-BLG-050, a high magnification microlensing event (A ∼ 432) whose peak occurred on 2 May, 2007, with pronounced finite-source and parallax effects. We compute planet detection efficiencies for this event in order to determine its sensitivity to the presence of planets around the lens star. Methods. Both finite-source and parallax effects permit a measurement of the angular Einstein radius θ<sub>E</sub> = 0.48 ± 0.01 mas and the parallax π<sub>E</sub> = 0.12 ± 0.03, leading to an estimate of the lens mass M = 0.50 ± 0.14 M<sub>◦.</sub> and its distance to the observer D<sub>L</sub> = 5.5 ± 0.4 kpc. This is only the second determination of a reasonably precise (<30%) mass estimate for an isolated unseen object, using any method. This allows us to calculate the planetary detection efficiency in physical units (r⊥, m<sub>p</sub>), where r⊥ is the projected planet-star separation and m<sub>P</sub> is the planet mass. Results. When computing planet detection efficiency, we did not find any planetary signature, i.e. none of the planetary configurations provides a Δ<sub>X</sub><sup>2</sup> improvement higher than 60, and our detection efficiency results reveal significant sensitivity to Neptune-mass planets, and to a lesser extent Earth-mass planets in some configurations. Indeed, Jupiter and Neptune-mass planets are excluded with a high confidence for a large projected separation range between the planet and the lens star, respectively [0.6-10] and [1.4-4] AU, and Earth-mass planets are excluded with a 10% confidence in the lensing zone, i.e. [1.8-3.1] AU.</s0></fC01><fC02 i1="01" i2="3"><s0>001E03</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Mesure masse</s0><s5>26</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Mass measurement</s0><s5>26</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Microlentille</s0><s5>27</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Microlenses</s0><s5>27</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Planète Neptune</s0><s5>28</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Neptune planet</s0><s5>28</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Planète Terre</s0><s5>29</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Earth planet</s0><s5>29</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Planète Jupiter</s0><s5>30</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Jupiter planet</s0><s5>30</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Mirage gravitationnel</s0><s5>31</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Gravitational lensing</s0><s5>31</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Espejismo gravitacional</s0><s5>31</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Système planétaire</s0><s5>32</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Planetary system</s0><s5>32</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Sistema planetario</s0><s5>32</s5></fC03><fN21><s1>018</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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