Trace search for NUV signal. Integrated fluxes along the axis of dispersion (along rows) as a function of row number. The black curves shows integrated fluxes within the wavelength range 2200–3110 Å and the blue curve fluxes within 3065 and 3110 Å. The vertical red line indicates the row where the target is expected to be located and the green line indicates a shift of three rows where flux displays a local maximum.