Top panel: Gemini/GNIRS raw spectra of HIP 17453 B from an A-nod (left) and B-nod (right) exposure on 2024 December 21, showing both the companion and a diffraction spike separated by several pixels. Three of the six orders are visible in this view of the GNIRS detector, with K on the far left and J on the right; for each order wavelength is increasing when moving down the chip. Bottom panels: several cuts across single wavelengths for these A-nod and B-nod GNIRS observations of HIP 17453 B, showing flux along the 7″ slit and the four distinct sources of light present: the cut through the halo of the primary star (the ∼40 pixel wide peak across the data), the sky background (a constant offset at all pixels along the slit), the companion flux (the marked ∼6 pixel wide peak), and the diffraction spike (marked by gray stripes).