Variation of N_H with orbital phase for observations where the source was in the hard (left), intermediate (middle), and soft (right) state. Upper panels: orbit dependence of N_H measurements for individual satellite orbit-wise spectra (black datapoints with gray uncertainties), as well as the average (red) and median (white) values for orbital phase bins with a width of Δφ_orb = 0.1. Lower panels: standard deviation σ { N_H,22 } ≔ σ { N_H/ (10²² cm^-2) } of the N_H measurements. The panels specifically show 1515 hard state (Γ₁ ≤ 2.0) observations that do not require a disk component, 384 intermediate state (2.0 < Γ₁ ≤ 2.5) observations that require a disk, and 506 soft state (2.5 < Γ₁) observations (all soft state observations require a disk component).