Pion-kaon femtoscopy at STAR

Heavy-ion collisions allow to study the properties of nuclear matter. To~study space-time parameters the method of femtoscopy is used. This method provides an information about the particle-emitting source size which is not accessible directly. From non-identical particle correlations one can obtain information about the asymmetry in emission process between those two kinds of particles. In this report we will present a status of a STAR analysis of pion-kaon correlations in Au+Au collisions at sqrt(s_NN) = 39 GeV.