Significance values derived from the T-test for the best-matching template. The black plus sign marks the peak significance, ﹩5.6\sigma ﹩, located at ﹩{V}_{\mathrm{sys}}=-33\pm 2﹩ km s⁻¹ and ﹩{K}_{{\rm{P}}}={133}_{-3.5}^{+4.3}﹩ km s⁻¹, where the errors are the maximal extent of the white 1σ error contour. The dashed white lines mark the known systemic velocity (﹩{V}_{\mathrm{sys}}=-33.25﹩ km s⁻¹), and the tentative reported value of ﹩{K}_{{\rm{P}}}=134.1\pm 1.8﹩ km s⁻¹ by Brogi et al. (2013). The peak significance and its ﹩1\sigma ﹩ error contour are coincident with these literature values. A dashed white horizontal line at ﹩{K}_{{\rm{p}}}=-134.1﹩ km s⁻¹ highlights that there is no matching signal in negative velocity space, acting as an additional sanity check against spurious signals.