  Present and future large scale surveys offer promising probes of cosmology.
For example the Dark Energy Survey (DES) is forecast to detect ~300 millions
galaxies and thousands clusters up to redshift ~1.3. I here show ongoing work
to combine two probes of large scale structure : cluster number counts and
galaxy 2-point function (in real or harmonic space). The halo model (coupled to
a Halo Occupation Distribution) can be used to model the cross-covariance
between these probes, and I introduce a diagrammatic method to compute easily
the different terms involved. Furthermore, I compute the joint non-Gaussian
likelihood, using the Gram-Charlier series. Then I show how to extend the
methods of Bayesian hyperparameters to Poissonian distributions, in a first
step to include them in this joint likelihood.
