2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83793A results of numerical procedure for construction of confidence intervals for parameter of Poisson distribution for signal in the presence of background which has Poisson distribution with known value of parameter are presented. It is shown that the described procedure has both Bayesian and frequentist interpretations.9 pages (1 LaTeX and 2 EPS files), two figures has been addedData Analysis, Statistics and ProbabilityProbabilitytext