MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756: Microlensing and a new time delay

E. Giannini; R. W. Schmidt; J. Wambsganss; K. Alsubai; J. M. Andersen; T. Anguita; V. Bozza; D. M. Bramich; P. Browne; S. Calchi Novati; Y. Damerdji; C. Diehl; P. Dodds; M. Dominik; A. Elyiv; X. Fang; R. Figuera Jaimes; F. Finet; T. Gerner; S. Gu; S. Hardis; K. Harpsøe; T. C. Hinse; A. Hornstrup; M. Hundertmark; J. Jessen-Hansen; U. G. Jørgensen; D. Juncher; N. Kains; E. Kerins; H. Korhonen; C. Liebig; M. N. Lund; M. S. Lundkvist; G. Maier; L. Mancini; G. Masi; M. Mathiasen; M. Penny; S. Proft; M. Rabus; S. Rahvar; D. Ricci; G. Scarpetta; K. Sahu; S. Schäfer; F. Schönebeck; J. Skottfelt; C. Snodgrass; J. Southworth; J. Surdej; J. Tregloan-Reed; C. Vilela; O. Wertz; F. Zimmer

doi:10.1051/0004-6361/201527422

MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756: Microlensing and a new time delay

E. Giannini^*
, R. W. Schmidt
, J. Wambsganss
, K. Alsubai
, J. M. Andersen
, T. Anguita
, V. Bozza
, D. M. Bramich
, P. Browne
, S. Calchi Novati
, Y. Damerdji
, C. Diehl
, P. Dodds
, M. Dominik
, A. Elyiv
, X. Fang
, R. Figuera Jaimes
, F. Finet
, T. Gerner
, S. Gu

S. Hardis, K. Harpsøe, T. C. Hinse, A. Hornstrup, M. Hundertmark, J. Jessen-Hansen, U. G. Jørgensen, D. Juncher, N. Kains, E. Kerins, H. Korhonen, C. Liebig, M. N. Lund, M. S. Lundkvist, G. Maier, L. Mancini, G. Masi, M. Mathiasen, M. Penny, S. Proft, M. Rabus, S. Rahvar, D. Ricci, G. Scarpetta, K. Sahu, S. Schäfer, F. Schönebeck, J. Skottfelt, C. Snodgrass, J. Southworth, J. Surdej, J. Tregloan-Reed, C. Vilela, O. Wertz, F. Zimmer

^*Corresponding author for this work

Astronomisches Rechen-Institut Heidelberg
Qatar Foundation
Boston University
Niels Bohr Institute
Universidad Andrés Bello
Millennium Institute of Astrophysics
Università di Salerno
Istituto Nazionale di Fisica Nucleare
Sezione di Napoli
SUPA
University of St Andrews
Istituto Internazionale per gli Alti Studi Scientifici (IIASS)
California Institute of Technology
University of Liege
University of Hamburg
Main Astronomical Observatory Nasu
Universita Degli Studi Bologna
Key Laboratory for the Structure and Evolution of Celestial Objects
Chinese Academy of Sciences
European Southern Observatory (ESO)
National Astronomical Observatory of Japan
Max Planck Institute for Astronomy
Yunnan Observatories
Korea Astronomy and Space Science Institute
Armagh Observatory
Technical University of Denmark
Georg-August-Universitat Gottingen
Stellar Astrophysics Centre
University of Aarhus
Bellatrix Astronomical Observatory
Centro de Astro-Ingeniería
Pontificia Universidad Catolica de Chile (Catholic University of Chile)
Perimeter Institute for Theoretical Physics
Observatorio Astronómico Nacional, Instituto de Astronomía – Universidad Nacional Autónoma de México
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Space Telescope Science Institute
Max-Planck-Institute for Solar System Research
University of Keele
NASA Ames Research Center
The Open University
Sharif University of Technology

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Abstract

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 Δt = (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.

Original language	English
Article number	A49
Journal	Astronomy and Astrophysics
Volume	597
Early online date	21 Dec 2016
DOIs	https://doi.org/10.1051/0004-6361/201527422
Publication status	Published - 1 Jan 2017

Keywords

Gravitational lensing: Micro
Quasars: General
Techniques: Photometric

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Giannini, E., Schmidt, R. W., Wambsganss, J., Alsubai, K., Andersen, J. M., Anguita, T., Bozza, V., Bramich, D. M., Browne, P., Calchi Novati, S., Damerdji, Y., Diehl, C., Dodds, P., Dominik, M., Elyiv, A., Fang, X., Figuera Jaimes, R., Finet, F., Gerner, T., ... Zimmer, F. (2017). MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756: Microlensing and a new time delay. Astronomy and Astrophysics, 597, Article A49. https://doi.org/10.1051/0004-6361/201527422

@article{ebf8e80873324773a6b61bb08a85d37f,

title = "MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756: Microlensing and a new time delay",

abstract = "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 Δt = (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.",

keywords = "Gravitational lensing: Micro, Quasars: General, Techniques: Photometric",

author = "E. Giannini and Schmidt, \{R. W.\} and J. Wambsganss and K. Alsubai and Andersen, \{J. M.\} and T. Anguita and V. Bozza and Bramich, \{D. M.\} and P. Browne and \{Calchi Novati\}, S. and Y. Damerdji and C. Diehl and P. Dodds and M. Dominik and A. Elyiv and X. Fang and \{Figuera Jaimes\}, R. and F. Finet and T. Gerner and S. Gu and S. Hardis and K. Harps{\o}e and Hinse, \{T. C.\} and A. Hornstrup and M. Hundertmark and J. Jessen-Hansen and J{\o}rgensen, \{U. G.\} and D. Juncher and N. Kains and E. Kerins and H. Korhonen and C. Liebig and Lund, \{M. N.\} and Lundkvist, \{M. S.\} and G. Maier and L. Mancini and G. Masi and M. Mathiasen and M. Penny and S. Proft and M. Rabus and S. Rahvar and D. Ricci and G. Scarpetta and K. Sahu and S. Sch{\"a}fer and F. Sch{\"o}nebeck and J. Skottfelt and C. Snodgrass and J. Southworth and J. Surdej and J. Tregloan-Reed and C. Vilela and O. Wertz and F. Zimmer",

year = "2017",

month = jan,

day = "1",

doi = "10.1051/0004-6361/201527422",

language = "English",

volume = "597",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Giannini, E, Schmidt, RW, Wambsganss, J, Alsubai, K, Andersen, JM, Anguita, T, Bozza, V, Bramich, DM, Browne, P, Calchi Novati, S, Damerdji, Y, Diehl, C, Dodds, P, Dominik, M, Elyiv, A, Fang, X, Figuera Jaimes, R, Finet, F, Gerner, T, Gu, S, Hardis, S, Harpsøe, K, Hinse, TC, Hornstrup, A, Hundertmark, M, Jessen-Hansen, J, Jørgensen, UG, Juncher, D, Kains, N, Kerins, E, Korhonen, H, Liebig, C, Lund, MN, Lundkvist, MS, Maier, G, Mancini, L, Masi, G, Mathiasen, M, Penny, M, Proft, S, Rabus, M, Rahvar, S, Ricci, D, Scarpetta, G, Sahu, K, Schäfer, S, Schönebeck, F, Skottfelt, J, Snodgrass, C, Southworth, J, Surdej, J, Tregloan-Reed, J, Vilela, C, Wertz, O & Zimmer, F 2017, 'MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756: Microlensing and a new time delay', Astronomy and Astrophysics, vol. 597, A49. https://doi.org/10.1051/0004-6361/201527422

TY - JOUR

T1 - MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756

T2 - Microlensing and a new time delay

AU - Giannini, E.

AU - Schmidt, R. W.

AU - Wambsganss, J.

AU - Alsubai, K.

AU - Andersen, J. M.

AU - Anguita, T.

AU - Bozza, V.

AU - Bramich, D. M.

AU - Browne, P.

AU - Calchi Novati, S.

AU - Damerdji, Y.

AU - Diehl, C.

AU - Dodds, P.

AU - Dominik, M.

AU - Elyiv, A.

AU - Fang, X.

AU - Figuera Jaimes, R.

AU - Finet, F.

AU - Gerner, T.

AU - Gu, S.

AU - Hardis, S.

AU - Harpsøe, K.

AU - Hinse, T. C.

AU - Hornstrup, A.

AU - Hundertmark, M.

AU - Jessen-Hansen, J.

AU - Jørgensen, U. G.

AU - Juncher, D.

AU - Kains, N.

AU - Kerins, E.

AU - Korhonen, H.

AU - Liebig, C.

AU - Lund, M. N.

AU - Lundkvist, M. S.

AU - Maier, G.

AU - Mancini, L.

AU - Masi, G.

AU - Mathiasen, M.

AU - Penny, M.

AU - Proft, S.

AU - Rabus, M.

AU - Rahvar, S.

AU - Ricci, D.

AU - Scarpetta, G.

AU - Sahu, K.

AU - Schäfer, S.

AU - Schönebeck, F.

AU - Skottfelt, J.

AU - Snodgrass, C.

AU - Southworth, J.

AU - Surdej, J.

AU - Tregloan-Reed, J.

AU - Vilela, C.

AU - Wertz, O.

AU - Zimmer, F.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - 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 Δt = (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.

AB - 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 Δt = (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.

KW - Gravitational lensing: Micro

KW - Quasars: General

KW - Techniques: Photometric

UR - https://www.scopus.com/pages/publications/85007348650

U2 - 10.1051/0004-6361/201527422

DO - 10.1051/0004-6361/201527422

M3 - Article

AN - SCOPUS:85007348650

SN - 0004-6361

VL - 597

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A49

ER -

MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756: Microlensing and a new time delay

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Keywords

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