Scale and position in the sky of the ARGUS array during the observations. The northeast (NE) and southwest (SW) side of the optical disk plane (marked with a black line) was covered, omitting the area closest to the star, where the stellar PSF and scattered light would be strong, giving low signal-to-noise ratio. Cyan- and magenta-coloured areas represent the higher (0.30″/pixel) and lower (0.52″/pixel) spatial resolution settings used for the inner and outer disk, respectively.