HDO 1_1,1–0_0,0 and OD line profiles observed towards IRAS 16293. The HDO spectrum was shifted by –2.9 K along the y-axis. The OD spectrum was smoothed to 0.39 km s^-1. The hyperfine intensity structure of the OD line is shown as red bars. Note that the OD observation is DSB while the HDO observation is SSB. The green curve shows the two-Gaussian fit of the HDO profile (see Table 1).