Comparison of the re-emission from bursts and the persistent preburst radiation with L_w = 9.6 × 10⁴⁴ erg s⁻¹ (left panels) and L_w = 5.0 × 10³⁴ erg s⁻¹ (right panels) for different P_orb and different M_c. Different colors represent different mechanisms, as indicated in the caption. We note that we show both Case I (blue lines) and Case II (light blue lines) for the persistent preburst radiation. The colored region means νL_ν > L_c, where the radiation will not be outshined by L_c. In the top panel, we show the variation of the peak luminosity νL_ν with M_c for a given P_orb = 1 and 10 d. In the bottom panel, we show the variation of νL_ν with P_orb for a given M_c = 1 and 10 M_⊙.