Stellar density after deconvolution correction as a function of the distance to the Galactic centre. Upper panel: M-giants within 12 lines of sight with Δb = 5°, Δℓ = 10°. Bottom panel: K-giants within five lines of sight with Δb = 15°, Δℓ = 30 ° ​/cos(b). Fits correspond to the average of all lines of sight in the range log₁₀[r_G(kpc)] between 1.4 and 1.95, except the line ℓ = 154°, b = −52.5°, which presents an anomaly. Error bars (corresponding to the error of measured ρ₀) of the first line of sight are plotted; for other lines of sight, the error bars are similar.