Simulated data showing variation of L with z for different ranges of θ. The black stars correspond to the value of L(z) that divides the points equally (above and below). The green stars reflect the same L(z) but without the green points, i.e., for points outside the jet. The yellow squares and cyan rectangles represent similar points (L(z)) for Γ = 30 and Γ = 200, respectively. The other, larger diamonds correspond to the observed data (Goldstein et al. 2017; Cano et al. 2017; Michałowski et al. 2018; Gehrels et al. 2006; D’Avanzo et al. 2014) along with the nature of their afterglows (flat, monotonic, or unavailable): dark cyan = short, flat; dark magenta = flat, monotonic; dark yellow = flat, unavailable; dark pink = long, flat; black = long, monotonic; and dark orange = long, unavailable. The analytical curves for α = 1.25 (black dot-dashed) and α = 1.33 (black dashed) are also shown.