Figure 2.

Simulated Gaussian bands centered at 49 cm⁻¹ (open circle) and 50 cm⁻¹ (closed circle) cm⁻¹ with different noise and increments, and their difference spectrum (open square). In panels B, E, and H, a random value from a Gaussian distribution is added such that the standard deviation is 4% of the band intensity. In panels C, F, and I, a random value from a Gaussian distribution is added such that the standard deviation is 10% of the band intensity. Spectral increments: (A–C) 1 cm⁻¹, (D– F) 5 cm⁻¹, and (G– I) 10 cm⁻¹.