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Mikkel Nørup Lund

MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE0047-1756: microlensing and a new time delay

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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DOI

  • E. Giannini, Aarhus Univ, Aarhus University, Dept Phys & Astron, Stellar Astrophys Ctr
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  • R. W. Schmidt, Heidelberg Univ, Ruprecht Karl University Heidelberg, Astronom Rechen Inst, Zentrum Astron
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  • J. Wambsganss, Heidelberg Univ, Ruprecht Karl University Heidelberg, Astronom Rechen Inst, Zentrum Astron
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  • K. Alsubai, Qatar Fdn, Qatar Foundation, Qatar Environm & Energy Res Inst QEERI, HBKU
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  • J. M. Andersen, Boston Univ, Boston University, Dept Astron, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Univ Copenhagen, University of Copenhagen, Nat Hist Museum Denmark, Ctr Star & Planet Format
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  • T. Anguita, Millennium Inst Astrophys
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  • V. Bozza, Ist Nazl Fis Nucl, Istituto Nazionale Geofisica e Vulcanologia (INGV), Istituto Nazionale di Fisica Nucleare, Sez Napoli
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  • D. M. Bramich, Qatar Fdn, Qatar Foundation, Qatar Environm & Energy Res Inst QEERI, HBKU
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  • P. Browne, Univ St Andrews, University of St Andrews, SUPA, Sch Phys & Astron
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  • S. Calchi Novati, CALTECH, California Institute of Technology, National Aeronautics & Space Administration (NASA), NASA, Exoplanet Sci Inst
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  • Y. Damerdji, Univ Liege, University of Liege, Inst Astrophys & Geophys
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  • C. Diehl, Univ Hamburg, University of Hamburg, Hamburger Sternwarte
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  • P. Dodds, Univ St Andrews, University of St Andrews, SUPA, Sch Phys & Astron
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  • M. Dominik, Univ St Andrews, University of St Andrews, SUPA, Sch Phys & Astron
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  • A. Elyiv, Univ Bologna, University of Bologna, Dipartimento Fis & Astron
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  • X. Fang, Chinese Acad Sci, Chinese Academy of Sciences, Key Lab Struct & Evolut Celestial Objects, Natl Astron Observat Yunnan Observ
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  • R. Figuera Jaimes, Univ St Andrews, University of St Andrews, SUPA, Sch Phys & Astron
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  • F. Finet, Natl Inst Nat Sci, National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS) - Japan, Natl Astron Observ Japan, Subaru Telescope
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  • T. Gerner, Max Planck Inst Astron, Max Planck Society
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  • S. Gu, Chinese Acad Sci, Yunnan Astronomical Observatory, NAOC, CAS, Chinese Academy of Sciences, Yunnan Observ
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  • S. Hardis, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr
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  • K. Harpsoe, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr
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  • T. C. Hinse, Armagh Observ, Coll Hill
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  • A. Hornstrup, Tech Univ Denmark, Technical University of Denmark, DTU Space, Natl Space Inst, Dept Math & Computat Geosci
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  • M. Hundertmark, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr
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  • J. Jessen-Hansen
  • U. G. Jorgensen
  • D. Juncher, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr
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  • N. Kains, Univ St Andrews, University of St Andrews, SUPA, Sch Phys & Astron
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  • E. Kerins, Univ Manchester, University of Manchester, Jodrell Bank Ctr Astrophy
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  • H. Korhonen, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr
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  • C. Liebig, Univ St Andrews, University of St Andrews, SUPA, Sch Phys & Astron
  • ,
  • M. N. Lund
  • M. S. Lundkvist
  • G. Maier, Max Planck Inst Astron, Max Planck Society
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  • L. Mancini, Univ Salerno, University of Salerno, Dipartimento Fis ER Caianiello
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  • G. Masi, Ctr Backyard Astrophys, Bellatrix Astron Observ
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  • M. Mathiasen, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr
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  • M. Penny, Univ Manchester, University of Manchester, Jodrell Bank Ctr Astrophy
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  • S. Proft, Heidelberg Univ, Ruprecht Karl University Heidelberg, Astronom Rechen Inst, Zentrum Astron
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  • M. Rabus, Pontificia Univ Caolic Chile, Inst Astrofis, Fac Fis, Ctr Astroingn
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  • S. Rahvar, Perimeter Inst Theoret Phys, Perimeter Institute for Theoretical Physics
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  • D. Ricci, Univ La Laguna, Universidad de la Laguna, Dept Astrofis
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  • G. Scarpetta, Ist Nazl Fis Nucl, Istituto Nazionale Geofisica e Vulcanologia (INGV), Istituto Nazionale di Fisica Nucleare, Sez Napoli
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  • K. Sahu, Space Telescope Sci Inst STScI
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  • S. Schaefer, Georg August Univ Gottingen, University of Gottingen, Inst Astrophys
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  • F. Schoenebeck, Heidelberg Univ, Ruprecht Karl University Heidelberg, Astronom Rechen Inst, Zentrum Astron
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  • J. Skottfelt, Open Univ, Open University - UK, Dept Phys Sci, Ctr Elect Imaging
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  • C. Snodgrass, Max Planck Inst Sonnensyst Forsch, Max Planck Society
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  • J. Southworth, Keele Univ, Keele University, Astrophys Grp, Newcastle Lyme
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  • J. Surdej, Univ Liege, University of Liege, Inst Astrophys & Geophys
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  • J. Tregloan-Reed, Keele Univ, Keele University, Astrophys Grp, Newcastle Lyme
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  • C. Vilela, Keele Univ, Keele University, Astrophys Grp, Newcastle Lyme
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  • O. Wertz, Univ Liege, University of Liege, Inst Astrophys & Geophys
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  • F. Zimmer, Heidelberg Univ, Ruprecht Karl University Heidelberg, Astronom Rechen Inst, Zentrum Astron

Aims. We present V and R photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756. The data were taken by the MiNDSTEp collaboration with the 1.54 m Danish telescope at the ESO La Silla observatory from 2008 to 2012.

Methods. Differential photometry has been carried out using the image subtraction method as implemented in the HOTPAnTS package, additionally using GALFIT for quasar photometry.

Results. The quasar WFI 2033-4723 showed brightness variations of order 0.5 mag in V and R during the campaign. The two lensed components of quasar HE 0047-1756 varied by 0.2-0.3 mag within five years. We provide, for the first time, an estimate of the time delay of component B with respect to A of Delta t = (7.6 +/- 1.8) days for this object. We also find evidence for a secular evolution of the magnitude difference between components A and B in both filters, which we explain as due to a long-duration microlensing event. Finally we find that both quasars WFI 2033-4723 and HE 0047-1756 become bluer when brighter, which is consistent with previous studies.

OriginalsprogEngelsk
Artikelnummer49
TidsskriftAstronomy & Astrophysics
Vol/bind597
Antal sider16
ISSN1432-0746
DOI
StatusUdgivet - jan. 2017

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