Measure of the H₂ cavity thickness from the NIRCam images. The black curve shows the transverse intensity profile perpendicular to the axis of the redshifted H₂ cavity measured on the NIRCam F212N image at ΔZ = 1.5″. The blue curve corresponds to the fit of the profile by a combination of 3 Gaussians. The red and yellow curves are the individual Gaussians fitting the two intensity peaks associated with the bright edges of the cavity. The orange curve corresponds to the fit of the wide baseline component. The gray line, called "CW" for Cavity Width, shows the separation between the two Gaussian center positions.