Table 6: Amplitude of proper motions of the main IRS 13E sources (from Ott et al. 2003).
Name mas/yr    km s-1
13E1 5.50 207 $\pm $ 14
13E2 8.20 310 $\pm $ 19
13E3 7.54 285 $\pm $ 270
13E4 7.77 294 $\pm $ 32


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