Left: ¹²CO spectrum at the position of the source (red) with corresponding kinematic distance (blue). Middle: H i, ¹²CO, and total column densities towards SNR G15.9+0.2 as a function of V_LSR. Right: ¹³CO intensity map in the velocity range 18 km s^-1 < V_LSR < 32 km s^-1, in units of K km s^-1. X-ray contours are overlaid in white. The black stripe comes from bad columns which have been set to 0.