Δχ² map in the logs– logq parameter plane obtained from the 2L1S modeling. Points marked in different colors represent the regions with Δχ² ≤ n(1²) (red), Δχ² ≤ n(2²) (yellow), Δχ² ≤ n(3²) (green), Δχ² ≤ n(4²) (cyan), and Δχ² ≤ n(5²) (blue), where n = 5. The left panel shows the map in the region with − 1.0 < logs ≤ 1.0 and − 5.8 < logq ≤ 0.0, and the right panel shows the map in the narrower region with − 0.26 < logs ≤ 0.26 and − 5.6 < logq ≤−1.9.