Analytical approximations (lines) and results of calculations (symbols) for oscillator strengths of transitions from the ground state to different bound states (s,ν) marked near the respective curves with absorption of a photon with polarization α = −1 (dot-dashed lines and empty circles), α = 0 (solid lines and crosses), or α = + 1 (dashed lines and filled dots) at B = 10¹¹ G (left panel), 3.16 × 10¹¹ G (middle panel), and 10¹² G (right panel).