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

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.; 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.; Vilela34, C.; Wertz, O.; Zimmer, F.

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


Authors

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. Surdej

J. Tregloan-Reed

C. Vilela34

O. Wertz

F. Zimmer



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 ?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.

Citation

Giannini, E., Schmidt, R., Wambsganss, J., Alsubai, K., Andersen, J., Anguita, T., …Zimmer, F. (2017). MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE0047-1756: microlensing and a new time delay. Astronomy & Astrophysics, 597, Article A49. https://doi.org/10.1051/0004-6361/201527422

Journal Article Type Article
Acceptance Date Sep 21, 2016
Online Publication Date Dec 21, 2016
Publication Date Jan 1, 2017
Publicly Available Date May 26, 2023
Journal Astronomy & Astrophysics
Print ISSN 0004-6361
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 597
Article Number A49
DOI https://doi.org/10.1051/0004-6361/201527422
Keywords gravitational lensing, micro, techniques, photometric, quasars, genera
Publisher URL https://doi.org/10.1051/0004-6361/201527422

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