Nearest neighbor distribution for the RASS and the stellar eRASS1 sources as a function of the positional accuracy given in the RASS catalog. The blue and cyan solid histograms show the nearest neighbor distributions for the main and supplement RASS sources (see text for details). Both histograms are normed to the same number of sources. The red and black dashed line show the Rayleigh distribution (Eq. (1)) and the best fit of the blue histogram applying Eq. (2), respectively.