Comparison of χ_e as a function of χ_p derived by Eq. (21) with different parameters. For all the line styles, the black and red curves represent the upper and lower limits, respectively. The solid curves are obtained when setting R as the maximum value given in Table 1 and values of other parameters as those provided by Banik & Bhadra (2019). Based on this, the dotted curves show the upper and lower limits when setting the electron injection luminosity to , the dashed-dotted curves show the upper and lower limits when setting the Doppler factor to δ^B and B × 2, and the dashed curve shows the lower limit when setting the blob radius to that used in Banik & Bhadra (2019). The vertical line represents χ_p = 0.5.