Top: original radial velocity data of IRAS 17038−4815 fitted with a Keplerian orbit folded on an orbital period of 1393 d and eccentricity of 0.6. Middle: pulsations in the radial velocity folded on a period of 37.3 d. The red squares and the purple shaded region display the position in the phase plot where the shocks occur. Bottom: pulsation cleaned orbit folded on a period of 1386 d with an eccentricity of 0.57.