The red stars indicate the redshift and SDSS absolute i-band magnitude of the seven RSBALs in our sample. The blue circles show the confirmed RSBALs from Hall et al. (2013). For comparison, the gray dots represent the 29580 BAL quasars from the SDSS DR12 quasar catalog. The vertical dashed line (z = 1.5) marks the minimum redshift where the spectra of our sample objects start to have C IV coverage. The quasars J1125+0029 and J1128+0113are the two RSBALs that lack C IV coverage in their observations.