In this paper we examine the extremal tail probabilities of moving sums in
a marked Poisson random field. These sums are computed by adding
up the weighted occurrences of events lying within a scanning set
of fixed shape and size. We also provide an alternative
representation of the constants of the asymptotic formulae in
terms of the occupation measure of the conditional local random
field at zero, and extend these representations to the constants of
asymptotic tail probabilities of Gaussian random fields.
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