APO 3.5-meter g'+r' Composite Image of the Lens System 2237+0305 (3 Nov 98)

Galaxy and four QSO images; SPIcam data with FWHM = 0.77" PSF. (Blow-up shown below).

Close-up of QSO images (Circle enclosing 4 images has a radius of 0.9".) Data obtained by Camron Hastings for the APO-PU Gravitational Lens Monitoring Project. Image processing by Dan Long and Ed Turner.