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, Khalid Al-Subai, 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 & 35 others 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

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 languageEnglish
Article numberA49
JournalAstronomy and Astrophysics
Volume597
DOIs
Publication statusPublished - 1 Jan 2017

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quasars
photometry
time lag
observatory
filter
European Southern Observatory
subtraction
observatories
brightness
method
telescopes
filters
estimates

Keywords

  • Gravitational lensing: Micro
  • Quasars: General
  • Techniques: Photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756 : Microlensing and a new time delay. / Giannini, E.; Schmidt, R. W.; Wambsganss, J.; Al-Subai, Khalid; 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.; Gu, S.; Hardis, S.; Harpsøe, K.; Hinse, T. C.; Hornstrup, A.; Hundertmark, M.; Jessen-Hansen, J.; Jørgensen, U. G.; Juncher, D.; Kains, N.; Kerins, E.; Korhonen, H.; Liebig, C.; Lund, M. N.; Lundkvist, M. S.; 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.

In: Astronomy and Astrophysics, Vol. 597, A49, 01.01.2017.

Research output: Contribution to journalArticle

Giannini, E, Schmidt, RW, Wambsganss, J, Al-Subai, 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
Giannini, E. ; Schmidt, R. W. ; Wambsganss, J. ; Al-Subai, Khalid ; 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. ; Gu, S. ; Hardis, S. ; Harpsøe, K. ; Hinse, T. C. ; Hornstrup, A. ; Hundertmark, M. ; Jessen-Hansen, J. ; Jørgensen, U. G. ; Juncher, D. ; Kains, N. ; Kerins, E. ; Korhonen, H. ; Liebig, C. ; Lund, M. N. ; Lundkvist, M. S. ; 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. / MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756 : Microlensing and a new time delay. In: Astronomy and Astrophysics. 2017 ; Vol. 597.
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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 Khalid Al-Subai 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",
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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 - Al-Subai, Khalid

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

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U2 - 10.1051/0004-6361/201527422

DO - 10.1051/0004-6361/201527422

M3 - Article

VL - 597

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A49

ER -