LOSVD of the second shell at r_s = 120 kpc (parameters of the shell are highlighted in bold in Table 1) for the projected radius R = 0.9r_s = 108 kpc according to the approximative LOSVD (Sect. 5, point 2) given by Eq. (15) (purple curve) and the model of radial oscillations (Sect. 2.3) (light blue curve almost merged with the purple one). Locations of peaks as given by the approximative maximal LOS velocities (Sect. 5, point 3) given by Eq. (17) are plotted with orange lines. Profiles do not include stars of the host galaxy that are not part of the shell system and are normalized, so that the total flux equals to one. For parameters of the host galaxy potential see Sect. 6.1.