$J_{125}$-band magnitude of the source and the fraction of the source’s redshift probability distribution function (PDF; $p(z)$) of which Ly$\alpha$ would be encompassed by the MOSFIRE $Y$ band (7.0 $\lesssim z \lesssim$ 8.2). We first assigned an initial priority based on the continuum magnitude, and then prioritized galaxies within that continuum magnitude bin by the normalized redshift integral. In this way, for two galaxies with similar redshift PDFs, the higher priority would go to the brighter one, while a faint galaxy with $z_{\rm phot} \sim$ 7.5 would be prioritized over a bright galaxy with $z_{\rm phot} \sim$ 6.0. In sum, we targeted 12 (8) galaxy candidates with $z_{\rm phot}=$ 6.8–8.2 (7.0–8.2). Of these, six galaxies have more than half of their redshift PDF placing Ly$\alpha$ in the MOSFIRE $Y$ band. The rest of slits in the mask were assigned to 18 galaxy candidates at lower redshifts of $z_{\rm phot}=$ 4–6 and one relatively bright star to monitor transparency and pointing accuracy. The median rest-frame absolute UV magnitude ($M_{\rm UV}$) of our targets (assuming they are at their photometric redshifts) is $-20.4$ for the $z=$ 7–8 sample, ranging from $-21.6$ to $-20.0$. The median $H_{160}$-band magnitude is 26.5, ranging \[25.6–27.2\]. The 