IMAGE-RESTORATION AND PHOTOMETRIC MONITORING OF THE GRAVITATIONAL LENS Q2237+0305

An image processing technique based on Lucy's algorithm [AJ, 79, 745 (1974)] was developed and tested on CCD frames of Q2237 +0305 obtained at Observatoire du mont Megantic on 1990 July 27 in FWHM similar to 1.5'' seeing and on 1990 October 16 (FWHM similar to 1.7''). Magnitudes were successfully obtained for the four components of this image which all lie within 1 arcsec of the lensing galaxy nucleus. Historical light curves (1986-1991) are constructed for the four images with the implementation of a ''bootstrap'' method. This also allows refinements to the estimates of differential extinction between the components and can detect microlensing events at the <0.1 mag level. The results of our photometry agree well with the trends defined by other observations taken in superior seeing at the same epoch.