Spectrum of IGR J19294+1816 obtained with the NuSTAR telescopes during the high state. The data from the two NuSTAR units are added together for plotting (but not for actual fit). The best-fitting residuals for models (top to bottom) without inclusion of the absorption feature, with fundamental only (at ∼42.8 keV; shown with the solid line in the top panel), and including the first harmonics (at ∼85 keV, dotted line in the top panel) are also shown.