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We compute all the top intersection numbers of divisors on the total space ofthe Poincare bundle restricted to the product of a curve and the abelianvariety. We use these computations to find the class of the universal thetadivisor and $m$-theta divisor inside the universal corank 1 semiabelian variety-- the boundary of the partial toroidal compactification of the moduli space ofabelian varieties. We give two computational examples: we compute the boundarycoefficient of the Andreotti-Mayer divisor (computed by Mumford but in a muchharder and ad hoc way), and the analog of this for the universal $m$-thetadivisor.Comment: v2: Weaker results: no claim regarding the Kodaira dimension of A_6.  The error in version 1 was in the computation of $m$-theta class (theorem 6.6  in v1) - the correct computation is theorem 4.15 in v2; v3: final version.  IMRN, to appea

Some Intersections in the Poincaré Bundle and the Universal Theta Divisor on