Characteristic time scales for electrons in the acceleration process in the shock from the side of the companion star (dot-dashed line) and the side of the Eta Carinae star (solid), the synchrotron cooling time of electrons at the shock from the side of the companion star (dotted), the IC cooling time scale in the Thomson regime (dot-dot-dashed) and in the Klein-Nishina regime (dashed). The intersection of the acceleration time scale with the IC cooling time scale in the Thomson regime gives the maximum energies of electrons accelerated at the shock from the side of the Eta Carinae star. The intersection of the acceleration time scale with the synchrotron cooling time scale gives the maximum energies of electrons accelerated at the shock from the side of the companion star. The parameters defining the acceleration scenario are  G, G, ξ^comp = 10^-4, and ξ^EC = 5 × 10^-6.