Calibrated 2D image of a single order-detector pair. The vertical axis is the spatial direction and the horizontal axis the spectral direction. The bright central source is GQ Lup A, and the fainter source at −0.71 arcseconds is GQ Lup B. The telluric lines are visible as vertical stripes in the image. The right panel shows the integrated line spread function and the spatial profile employed for the extraction of the data at the position of GQ Lup B.