V magnitudes obtained with the ISIS data processing system for the ABCD components of the gravitational lens system QSO2237+0305
V magnitudes and error bars (txt file)
R magnitudes obtained with the ISIS data processing system for the ABCD components of the gravitational lens system QSO2237+0305
R magnitudes and error bars (txt file)
GLITP monitoring of QSO 2237+0305: Point-Spread Function photometry