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; Kennet Bomann West Harpsøe; T. C. Hinse; A. Hornstrup; M. Hundertmark; J. Jessen-Hansen; U. G. Jørgensen; Diana Juncher; N. Kains; E. Kerins; H. Korhonen; C. Liebig; Mikkel Nørup 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; Jesper Mirsa 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. GuS. Hardis, Kennet Bomann West Harpsøe, T. C. Hinse, A. Hornstrup, M. Hundertmark, J. Jessen-Hansen, U. G. Jørgensen, Diana Juncher, N. Kains, E. Kerins, H. Korhonen, C. Liebig, Mikkel Nørup 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, Jesper Mirsa Skottfelt, C. Snodgrass, J. Southworth, J. Surdej, J. Tregloan-Reed, C. Vilela, O. Wertz, F. Zimmer

6 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 language	English
Article number	A49
Journal	Astronomy & Astrophysics
Volume	597
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/201527422
Publication status	Published - 1 Jan 2017

Keywords

gravitational lensing: micro
techniques: photometric
quasars: general

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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 & Astrophysics, 597, Article A49. https://doi.org/10.1051/0004-6361/201527422

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, KBW, 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, JM, 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 & Astrophysics, vol. 597, A49. https://doi.org/10.1051/0004-6361/201527422

@article{8adcbc562fd04a97bd3a7be5f39ace40,

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, techniques: photometric, quasars: general",

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 Harps{\o}e, {Kennet Bomann West} and Hinse, {T. C.} and A. Hornstrup and M. Hundertmark and J. Jessen-Hansen and J{\o}rgensen, {U. G.} and Diana Juncher and N. Kains and E. Kerins and H. Korhonen and C. Liebig and Lund, {Mikkel N{\o}rup} 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 Skottfelt, {Jesper Mirsa} 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 & Astrophysics",

issn = "0004-6361",

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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 - 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, Kennet Bomann West

AU - Hinse, T. C.

AU - Hornstrup, A.

AU - Hundertmark, M.

AU - Jessen-Hansen, J.

AU - Jørgensen, U. G.

AU - Juncher, Diana

AU - Kains, N.

AU - Kerins, E.

AU - Korhonen, H.

AU - Liebig, C.

AU - Lund, Mikkel Nørup

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, Jesper Mirsa

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 - techniques: photometric

KW - quasars: general

U2 - 10.1051/0004-6361/201527422

DO - 10.1051/0004-6361/201527422

M3 - Journal article

SN - 0004-6361

VL - 597

JO - Astronomy & Astrophysics

JF - Astronomy & 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

Abstract

Keywords

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