Lyα NB centered at RID = 4838. The Lyα NB was extracted from the MXDF data cube with a wavelength range of 4935−4948 Å and a size of 10″ × 10″ by source inspector, which was used to visually inspect the MXDF sources. The color bar shows the flux with an arbitrary normalization. The filled pink and filled purple circles indicate a nonisolated galaxy in our sample and its neighbor, which is not included in our sample with a spec-z measurement, respectively. The black open circles show sources in the catalog of Rafelski et al. (2015). The cyan circle indicates a -radius circle centered at the position of RID = 4838. The ID, F775W magnitude, and z_s are shown for each object.