56 citations · 84 across the 7 of their papers we have counts for
Showing 1995Show all
2 papers · 1 filter
astro-ph1995
Monitoring of the Einstein Cross with the Nordic Optical Telscope
R. Oestensen, S. Refsdal, R. Stabell +26
We report results from five years of monitoring of the Einstein Cross (Q 2237+0305) with the Nordic Optical Telescope. The photometry, mainly in the R and I bands, has been perform…
astro-ph1995★ 17 cited
The light curve and the time delay of QSO 0957+561
Jaan Pelt, Rainer Kayser, Sjur Refsdal +1
We present a new analysis of the presently available photometric data for the gravitationally lensed quasar 0957+561 A,B with the aim of determining the time delay between its two…