[en] The microlensing event OGLE-2008-BLG-510 is characterized by an evident asymmetric shape of the peak, promptly detected by the Automated Robotic Terrestrial Exoplanet Microlensing Search (ARTEMiS) system in real time. The skewness of the light curve appears to be compatible both with binary-lens and binary-source models, including the possibility that the lens system consists of an M dwarf orbited by a brown dwarf. The detection of this microlensing anomaly and our analysis demonstrate that: (1) automated real-time detection of weak microlensing anomalies with immediate feedback is feasible, efficient and sensitive, (2) rather common weak features intrinsically come with ambiguities that are not easily resolved from photometric light curves, (3) a modelling approach that finds all features of parameter space rather than just the 'favourite model' is required and (4) the data quality is most crucial, where systematics can be confused with real features, in particular small higher order effects such as orbital motion signatures. It moreover becomes apparent that events with weak signatures are a silver mine for statistical studies, although not easy to exploit. Clues about the apparent paucity of both brown-dwarf companions and binary-source microlensing events might hide here. Based in part on data collected by MiNDSTEp with the Danish 1.54m telescope at the ESO La Silla Observatory.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bozza, V.; Dipartimento di Fisica 'E.R. Caianiello', Università degli Studi di Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy ; INFN, Gruppo Collegato di Salerno, Sezione di Napoli, Italy
Dominik, M.; SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS
Rattenbury, N. J.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
Jørgensen, U. G.; Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark ; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5-7, 1350 Copenhagen, Denmark
Tsapras, Y.; Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, suite 102, Goleta, CA 93117, USA ; Astronomy Unit, School of Mathematical Sciences, Queen Mary, University of London, London E1 4NS
Bramich, D. M.; ESO Headquarters, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Bond, I. A.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Liebig, C.; SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS ; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Cassan, A.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany ; UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Fouqué, P.; IRAP, CNRS, Université de Toulouse, 14 avenue Edouard Belin, 31400 Toulouse, France
Wada, K.; Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
Yock, P. C. M.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
Gulbis, A.; South African Large Telescope, PO Box 9, Observatory 7935, South Africa ; South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa
Hashimoto, Y.; Department of Earth Sciences, National Taiwan Normal University, No. 88, Section 4, Tingzhou Road, Wenshan District, Taipei 11677, Taiwan
Kniazev, A.; South African Large Telescope, PO Box 9, Observatory 7935, South Africa ; South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa
Vaisanen, P.; South African Large Telescope, PO Box 9, Observatory 7935, South Africa ; South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa)
Fukui, A.; Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Asakuchi, Okayama 719-0232, Japan
Hundertmark, M.; SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS ; Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Shin, I.-G.; Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Lee, S. H.; Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Choi, J.-Y.; Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Park, S.-Y.; Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Gould, A.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Allan, A.; School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL
Mao, S.; Jodrell Bank Centre for Astrophysics, University of Manchester Alan Turing Building, Manchester M13 9PL
Wyrzykowski, Ł.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
Street, R. A.; Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, suite 102, Goleta, CA 93117, USA
Buckley, D.; South African Large Telescope, PO Box 9, Observatory 7935, South Africa
Nagayama, T.; Department of Physics and Astrophysics, Faculty of Science, Nagoya University, Nagoya 464-8602, Japan
Mathiasen, M.; Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
Hinse, T. C.; Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark ; Armagh Observatory, College Hill, Armagh BT61 9DG ; Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348, South Korea
Novati, S. Calchi; Dipartimento di Fisica 'E.R. Caianiello', Università degli Studi di Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy ; Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Vietri Sul Mare (SA), Italy
Harpsøe, K.; Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark ; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5-7, 1350 Copenhagen, Denmark
Mancini, L.; Dipartimento di Fisica 'E.R. Caianiello', Università degli Studi di Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy ; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
Scarpetta, G.; Dipartimento di Fisica 'E.R. Caianiello', Università degli Studi di Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy ; INFN, Gruppo Collegato di Salerno, Sezione di Napoli, Italy ; Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Vietri Sul Mare (SA), Italy
Anguita, T.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany ; Departamento de Astronomía y Astrofísica, Centro de Astro-Ingeniería, Pontificia Universidad Católica de Chile, Casilla 306, Santiago, Chile
Burgdorf, M. J.; Deutsches SOFIA Institut, Universität Stuttgart, Pfaffenwaldring 29, 70569 Stuttgart, Germany ; SOFIA Science Center, NASA Ames Research Center, Mail Stop N211-1, Moffett Field, CA 94035, USA
Horne, K.; SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS
Hornstrup, A.; Institut for Rumforskning og-teknologi, Danmarks Tekniske Universitet, Juliane Maries Vej 30, 2100 Kbenhavn, Denmark
Kains, N.; SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews KY16 9SS ; ESO Headquarters, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Kerins, E.; Jodrell Bank Centre for Astrophysics, University of Manchester Alan Turing Building, Manchester M13 9PL
Kjærgaard, P.; Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
Masi, G.; Bellatrix Astronomical Observatory, Via Madonna de Loco 47, 03023 Ceccano (FR), Italy
Rahvar, S.; Department of Physics, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran ; Perimeter Institute for Theoretical Physics, 31 Caroline St. N., Waterloo, ON N2L 2Y5, Canada
Ricci, Davide ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Snodgrass, C.; Max Planck Institute for Solar System Research, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany ; European Southern Observatory (ESO), Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile
Southworth, J.; Astrophysics Group, Keele University, Staffordshire ST5 5BG
Steele, I. A.; Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Thöne, C. C.; Instituto de Astrofísica de Andalucía, Glorieta de la Astronomía s/n, 18008 Granada, Spain ; Dark Cosmology Centre, Niels Bohr Institutet, Københavns Universitet, Juliane Maries Vej 30, 2100 København Ø, Denmark
Wambsganss, J.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Zub, M.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Albrow, M. D.; Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
Batista, V.; UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Beaulieu, J.-P.; UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Bennett, D. P.; Department of Physics, 225 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, USA
Caldwell, J. A. R.; McDonald Observatory, 16120 State Highway Spur 78 #2, Fort Davis, TX 79734, USA
Cole, A. A.; School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Cook, K. H.; Institute of Geophysics and Planetary Physics (IGPP), L-413, Lawrence Livermore National Laboratory, PO Box 808, Livermore, CA 94551, USA
Coutures, C.; UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Dieters, S.; School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Prester, D. Dominis; Department of Physics, University of Rijeka, Omladinska 14, 51000 Rijeka, Croatia
Donatowicz, J.; Technische Universität Wien, Wiedner Hauptstr. 8-10, 1040 Wien, Austria
Greenhill, J.; School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Kane, S. R.; NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125, USA
Kubas, D.; UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France ; European Southern Observatory (ESO), Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile
Marquette, J.-B.; UPMC-CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Szymański, M. K.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Kubiak, M.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Pietrzyński, G.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; Departamento de Astronomia, Universidad de Concepción, Casilla 160-C Concepción, Chile
DePoy, D. L.; Department of Physics, Texas A&M University, 4242 TAMU, College Station, TX 77843-4242, USA
Dong, Subo; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA ; Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA
Han, C.; Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea
Janczak, J.; Department of Physics, Ohio State University, 191 W. Woodruff, Columbus, OH 43210, USA
Lee, C.-U.; Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348, South Korea
Pogge, R. W.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Abe, F.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Furusawa, K.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Hearnshaw, J. B.; Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
Itow, Y.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Kilmartin, P. M.; Mt John Observatory, PO Box 56, Lake Tekapo 8770, New Zealand
Korpela, A. V.; School of Chemical and Physical Sciences, Victoria University, Wellington 6140, New Zealand
Lin, W.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Ling, C. H.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Masuda, K.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Matsubara, Y.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Miyake, N.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Muraki, Y.; Department of Physics, Konan University, Nishiokamoto 8-9-1, Kobe 658-8501, Japan
Ohnishi, K.; Nagano National College of Technology, Nagano 381-8550, Japan
Perrott, Y. C.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
Saito, To; Tokyo Metropolitan College of Aeronautics, Tokyo 116-8523, Japan
Skuljan, L.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Sullivan, D. J.; School of Chemical and Physical Sciences, Victoria University, Wellington 6140, New Zealand
Sumi, T.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan ; Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
Suzuki, D.; Department of Earth and Space Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
Sweatman, W. L.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
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