Left: comparison between z _phot and z _spec for our spec-z-confirmed sources. The red filled and open circles represent the sources selected from A23 and other selections, respectively (see Section 3.1). The error bars show the 1σ error range for the A23 sample, while the other sources show the 2σ error range given the nonhomogeneous selection criteria adopted in the MSA target selection process (Section 2.2). Right: comparison between the redshift estimates based on lines (z _line) and the Lyα break (z _break) for six sources whose multiple emission lines are successfully detected in the prism spectrum. Two sources (ID20466 and ID10646) show z _break − z _line < −0.1, indicating the presence of the nonzero fluxes blueward of the Lyα emission in the prism spectra and the ionized bubbles around these two sources (Section 5).