Sketch of the r-process ejecta model from an NSM. The distance between the observer and the NSM is D. In this model, the ejecta radius is a, subtended angle θ2. The r-process material is distributed in the shell of the ejecta with mass percentage f and density ρ2, and in the core with remaining mass, with radius R, subtended angle θ1, and density ρ2.