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Fig. 3

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Simulated image and its components (Sect. 2.1). (a) Straight filament with the profile displayed in Fig. 2, normalized to . (b) Identical Gaussian sources with an intrinsic FWHM size of 24′′, convolved to 18′′ resolution and normalized to IP = 100. (c) Isotropic Gaussian background with a size of 4000′′ (FWHM), normalized to IP,b = 10. (d) Random instrumental noise with σnoise = 1.25. (e) Full simulated image ℐλO (≡ℐλD) with S/N = 80 and resolution of 18′′. Three horizontal lines indicate the locations and direction of the profiles shown in Fig. 2. Each panel’s dimensions are 600 × 2820 pixels (), pixel size Δ = 2″.

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