Imaging around PC1643+4631A at the Lyman limit
  We present a list of candidates for high redshift late-type galaxies in the field around the z=3.79 quasar PC1643+4631A. Deep U,V and R imaging has been used to search for objects with a strong Lyman break between U and V, characteristic of galaxies with high hydrogen column densities at $z\sim 3$. A further study of the red objects detected by Hu & Ridgway (1994) has been done, allowing the temptative identification of many of them as low redshift ($z\sim 0.4$) elliptical galaxies. 
I. Ferreras, N. Benitez, E. Martinez-Gonzalez (IFCA-UC)