Comparison between the 1D CCFs resulting from the cross correlation between the artificially broadened models and the unbroadened model (dashed lines) vs. the data with the same unbroadened model (black solid line). The models were broadened with a ﹩v\sin (i)﹩ kernel and correspond to ﹩v\sin (i)﹩ values from 0 to 12 km s⁻¹. The models and the data have all been normalized so that their peak values are at one so that the widths of the lines can be compared more easily. The width of the CCF made using the CRIRES+ data falls between the profiles of the 0 and 3 km s^–1 ﹩v\sin (i)﹩ models, and we determine a ﹩v\sin (i)﹩ of 2.1 km s⁻¹ using this method.