Section of the summed and normalized CCF for 51 Peg b (solid black line), assuming ﹩{K}_{{\rm{P}}}=133﹩ km s⁻¹. The dashed red line is the best-fitting Gaussian to the CCF centered at ﹩{V}_{\mathrm{sys}}=-33﹩ km s⁻¹. The Gaussian has a ﹩\mathrm{FWHM}=5.6﹩ km s⁻¹. The dotted blue line is the cross-correlation function of the best-matching template with itself after broadening the template to match a spectral resolution of R = 100,000.