74 citations · 174 across the 5 of their papers we have counts for
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First estimate of the time delay in HE 1104-1805
Lutz Wisotzki, Olaf Wucknitz, Sebastian Lopez +1
We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this…
Detection of the lensing galaxy in HE 2149-2745
Sebastian Lopez, Olaf Wucknitz, Lutz Wisotzki
We have obtained new BVR-band images of the gravitationally lensed QSO pair HE 2149-2745 A,B (QSO redshift z=2.033; angular separation theta_AB=1.71 arcsec), under 1 arcsec seeing…
High resolution optical and near-IR imaging of the quadruple quasar RX J0911.4+0551
I. Burud, F. Courbin, C. Lidman +10
We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3.1", it is the quadruply imaged QSO with the wid…