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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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.; 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, Kennet Bomann West; Hinse, T. C.; Hornstrup, A.; Hundertmark, M.; Jessen-Hansen, J.; Jørgensen, U. G.; Juncher, Diana; Kains, N.; Kerins, E.; Korhonen, H.; Liebig, C.; Lund, Mikkel Nørup; 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, Jesper Mirsa; Snodgrass, C.; Southworth, J.; Surdej, J.; Tregloan-Reed, J.; Vilela, C.; Wertz, O.; Zimmer, F.
I: Astronomy & Astrophysics, Bind 597, A49, 2017.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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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
Y1 - 2017
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. Based on data collected by MiNDSTEp with the Danish 1.54 m telescope at the ESO La Silla observatory.
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. Based on data collected by MiNDSTEp with the Danish 1.54 m telescope at the ESO La Silla observatory.
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
VL - 597
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A49
ER -
ID: 170453734