Notes. Grism spectroscopic data for the C III] emitters in the UDF10. HUDF IDs come from the van Dokkum et al. (2013) catalog. “[O II]” refers to the combined [O II] λλ3727, 3729 doublet and “[O III]” refers to the combined [O III] λλ4959, 5007 doublet. The redshift coverage of C III] in MUSE and [O III] in the G141 grism is 1.4 ≲ z ≲ 2.4. All EWs are quoted in the rest frame. Upper limits for [O II] are based on the broadband J_F125W continuum level and the brighter of the 3σ flux measurement from the spectrum or the flux limit of the stacked grism spectra (3σ ~ 3.9 × 10^-18 erg s^-1 cm^-2; Brammer et al. 2013). Values of 12 + log (O / H) (gas-phase metallicity) are estimated using the R₂₃ ratio [([O II] + [O III])/Hβ] and the calibration of Kobulnicky et al. (1999) for both the upper and lower branches of the R₂₃ parameter.