Article (Scientific journals)
An analysis of binary microlensing event OGLE-2015-BLG-0060
Tsapras, Y.; Cassan, A.; Ranc, C. et al.
2019In Monthly Notices of the Royal Astronomical Society, 487 (4), p. 4603-4614
 

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Keywords :
Galaxy: Bulge
Abstract :
[en] We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up observations from the robotic telescopes of the Las Cumbres Observatory. We show that, for the first time, all main features of an anomalous microlensing event are well covered by follow-up data, allowing us to estimate the physical parameters of the lens. The strong detection of second-order effects in the event light curve necessitates the inclusion of longer-baseline survey data in order to constrain the parallax vector. We find that the event was most likely caused by a stellar binary-lens with masses M = 0.87 pm 0.12 mathrm{M} and M = 0.77 pm 0.11 mathrm{M}. The distance to the lensing system is 6.41 ± 0.14 kpc and the projected separation between the two components is 13.85 ± 0.16 au. Alternative interpretations are also considered. © 2019 The Author(s).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Tsapras, Y.;  Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr 12-14, Heidelberg, D-69120, Germany
Cassan, A.;  Institut d'Astrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, Paris, F-75014, France
Ranc, C.;  Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States
Bachelet, E.;  Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, suite 102, Goleta, CA 93117, United States
Street, R.;  Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, suite 102, Goleta, CA 93117, United States
Udalski, A.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Hundertmark, M.;  Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr 12-14, Heidelberg, D-69120, Germany
Bozza, V.;  Dipartimento di Fisica 'E.R. Caianiello', Università di Salerno, Via Giovanni Paolo II 132, Fisciano, I-84084, Italy, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Via Cintia, Napoli, I-80126, Italy
Beaulieu, J. P.;  Institut d'Astrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, Paris, F-75014, France, School of Physical Sciences, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Marquette, J. B.;  Institut d'Astrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, Paris, F-75014, France
Euteneuer, E.;  Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr 12-14, Heidelberg, D-69120, Germany
Bramich, D. M.;  New York University Abu Dhabi, PO Box 129188, Saadiyat-Island, Abu Dhabi, United Arab Emirates
Dominik, M.;  SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, StAndrews, KY16 9SS, United Kingdom
Figuera Jaimes, R.;  SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, StAndrews, KY16 9SS, United Kingdom, Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing, 100084, China
Horne, K.;  SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, StAndrews, KY16 9SS, United Kingdom
Mao, S.;  Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing, 100084, China, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China, Jodrell Bank, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
Menzies, J.;  South African Astronomical Observatory, PO Box 9, Observatory, 7935, South Africa
Schmidt, R.;  Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr 12-14, Heidelberg, D-69120, Germany
Snodgrass, C.;  Planetary and Space Sciences, Department of Physical Sciences, Open University, Milton Keynes, MK7 6AA, United Kingdom, Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, EH9 3HJ, United Kingdom
Steele, I. A.;  Astrophysics Research Institute, Liverpool John Moores University, Liverpool, CH41 1LD, United Kingdom
Wambsganss, J.;  Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr 12-14, Heidelberg, D-69120, Germany, International Space Science Institute (ISSI), Hallerstrasse 6, Bern, CH-3012, Switzerland
Mróz, P.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Szymański, M. K.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Soszyński, I.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Skowron, J.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Pietrukowicz, P.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Kozłowski, S.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Poleski, R.;  Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, United States
Ulaczyk, K.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Pawlak, M.;  Warsaw University Observatory, Al. Ujazdowskie 4, Warszawa, PL-00-478, Poland
Jørgensen, U. G.;  Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Ø ster Voldgade 5, Copenhagen, DK-1350, Denmark
Skottfelt, J.;  Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Ø ster Voldgade 5, Copenhagen, DK-1350, Denmark, Centre for Electronic Imaging, Department of Physical Sciences, Open University, Milton Keynes, MK7 6AA, United Kingdom
Popovas, A.;  Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Ø ster Voldgade 5, Copenhagen, DK-1350, Denmark
Ciceri, S.;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, D-69117, Germany
Korhonen, H.;  Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Ø ster Voldgade 5, Copenhagen, DK-1350, Denmark, Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen Ø, DK-2100, Denmark, Finnish Centre for Astronomy with ESO (FINCA), Väisäläntie 20, Piikkiö, FI-21500, Finland
Kuffmeier, M.;  Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Ø ster Voldgade 5, Copenhagen, DK-1350, Denmark
Evans, D. F.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Peixinho, N.;  Unidad de Astronomía, Fac. de Ciencias Básicas, Universidad de Antofagasta, Avda. U. de Antofagasta, Antofagasta, 02800, Chile, CITEUC - Centre for Earth and Space Science Research of the University of Coimbra, Observatório Astronómico da Universidade de Coimbra, Coimbra, P-3030-004, Portugal
Hinse, T. C.;  Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon, 305-348, South Korea
Burgdorf, M. J.;  Universität Hamburg, Faculty of Mathematics, Informatics and Natural Sciences, Department of Earth Sciences, Meteorological Institute, Bundesstraße 55, Hamburg, D-20146, Germany
Southworth, J.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Tronsgaard, R.;  Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, DK-8000, Denmark
Kerins, E.;  Jodrell Bank, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
Andersen, M. I.;  Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen Ø, DK-2100, Denmark
Rahvar, S.;  Department of Physics, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran
Wang, Y.;  Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China
Wertz, Olivier ;  Université de Liège - ULiège
Rabus, M.;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, D-69117, Germany, Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, 7820436, Chile
Calchi Novati, S.;  IPAC, Mail Code 100-22, Caltech, 1200 E. California Blvd., Pasadena, CA 91125, United States
D'ago, G.;  Dipartimento di Fisica 'E.R. Caianiello', Università di Salerno, Via Giovanni Paolo II 132, Fisciano, I-84084, Italy, INAF - Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, Napoli, I-80131, Italy
Scarpetta, G.;  Dipartimento di Fisica 'E.R. Caianiello', Università di Salerno, Via Giovanni Paolo II 132, Fisciano, I-84084, Italy, Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Via G. Pellegrino 19, Vietri sul Mare, SA I-84019, Italy
Mancini, L.;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, D-69117, Germany, Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, Rome, I-00133, Italy, INAF - Astrophysical Observatory of Turin, Via Osservatorio 20, Pino Torinese, I-10025, Italy
Abe, F.;  Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601, Japan
Asakura, Y.;  Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601, Japan
Bennett, D. P.;  Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States, Department of Astronomy, University of Maryland, College Park, MD 20742, United States
Bhattacharya, Atri ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
Donachie, M.;  Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
Evans, P.;  Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
Fukui, A.;  Okayama Observatory, National Astronomical Observatory of Japan, 3037-5 Honjo, Kamogata, Asakuchi, Okayama, 719-0232, Japan
Hirao, Y.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Itow, Y.;  Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601, Japan
Kawasaki, K.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Koshimoto, N.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Li, M. C. A.;  Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
Ling, C. H.;  Institute of Natural and Mathematical Sciences, Massey University, Auckland, 0745, New Zealand
Masuda, K.;  Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601, Japan
Matsubara, Y.;  Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601, Japan
Muraki, Y.;  Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, 464-8601, Japan
Miyazaki, S.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Nagakane, M.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Ohnishi, K.;  Nagano National College of Technology, Nagano, 381-8550, Japan
Rattenbury, N.;  Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
Saito, T.;  Tokyo Metropolitan College of Aeronautics, Tokyo, 116-8523, Japan
Sharan, A.;  Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
Shibai, H.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Sullivan, D. J.;  School of Chemical and Physical Sciences, Victoria University, PO Box 600, Wellington, 6140, New Zealand
Sumi, T.;  Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
Suzuki, D.;  Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States
Tristram, P. J.;  University of Canterbury Mt. John Observatory, PO Box 56, Lake Tekapo, 8770, New Zealand
Yamada, T.;  Department of Physics, Faculty of Science, Kyoto Sangyo University, Kyoto, 603-8555, Japan
Yonehara, A.;  SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, StAndrews, KY16 9SS, United Kingdom
More authors (71 more) Less
Language :
English
Title :
An analysis of binary microlensing event OGLE-2015-BLG-0060
Publication date :
2019
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Oxford University Press, Oxford, United Kingdom
Volume :
487
Issue :
4
Pages :
4603-4614
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