91 citations · 139 across the 4 of their papers we have counts for
1 paper · 2 filters
J. E. Ovaldsen, J. Teuber, R. Stabell +1
We present R- and V-band photometry of the gravitational lens system QSO 0957+561 from five nights (one in 2000 January and four in 2001 March, corresponding to the approximate tim…