Abstract
We give a new construction of the irregular surfaces of general type with p_g=5, \chi=2, K^ 2=8 ,recently discovered by C. Schoen in [24]. Our approach proves that, if S is a general Schoen surface, its canonical map is a finite morphism of degree 2 onto a canonical surface with invariants p_{g}=5, \chi=6, \, K^{2}=8 , a complete intersection of a quadric and a quartic hypersurface in \mathbb P^{4} , with 40 even nodes.
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