  We study the implications of dark matter searches, together with collider
constraints, on the phenomenological MSSM with neutralino dark matter and focus
on the consequences of the related uncertainties in some detail. We consider,
inter alia, the latest results from AMS-02, Fermi-LAT and XENON1T. In
particular, we examine the impact of the choice of the dark matter halo
profile, as well as the propagation model for cosmic rays, for dark matter
indirect detection and show that the constraints on the MSSM differ by one to
two orders of magnitude depending on the astrophysical hypotheses. On the other
hand, our limited knowledge of the local relic density in the vicinity of the
Earth and the velocity of Earth in the dark matter halo leads to a factor 3 in
the exclusion limits obtained by direct detection experiments. We identified
the astrophysical models leading to the most conservative and the most
stringent constraints and for each case studied the complementarities with the
latest LHC measurements and limits from Higgs, SUSY and monojet searches. We
show that combining all data from dark matter searches and colliders, a large
fraction of our supersymmetric sample could be probed. Whereas the direct
detection constraints are rather robust under the astrophysical assumptions,
the uncertainties related to indirect detection can have an important impact on
the number of the excluded points.
