The AGN nature of strong C III] emitters in the early Universe with JWST

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Volume 709 (May 2026)

A&A, 709 (2026) A46

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Table C.1.

Properties of the C III] emitter sample

ID	RA [deg]	Dec [deg]	z_spec	Broad	UV diagnostic	EW_CIII] [Å]	β_UV
CAPERS-121916	34.23591	-5.08822	6.011	Not broad	AGN	73.7 ± 43.8	$- 1 . 36_{+ 0.96}^{- 0.98}$ $Mathematical equation: $ -1.36^{-0.98}_{+0.96} $$
CEERS-397	214.8362	52.88269	6.007	AGN	Potential AGN	5.5 ± 2.5	$- 1 . 75_{+ 0.07}^{- 0.08}$ $Mathematical equation: $ -1.75^{-0.08}_{+0.07} $$
COSMOS-61234	150.1069	2.360046	6.996	AGN	–	28.7 ± 8.0	$- 1 . 16_{+ 0.22}^{- 0.22}$ $Mathematical equation: $ -1.16^{-0.22}_{+0.22} $$
COSMOS-67506	150.1266	2.39305	5.867	Not broad	AGN	21.9 ± 8.3	$- 1 . 59_{+ 0.10}^{- 0.10}$ $Mathematical equation: $ -1.59^{-0.10}_{+0.10} $$
GDS-7807	53.10476	-27.8323	5.396	Not broad	AGN	35.3 ± 10.2	$- 2 . 16_{+ 0.20}^{- 0.20}$ $Mathematical equation: $ -2.16^{-0.20}_{+0.20} $$
GDS-13176	53.12176	-27.7976	5.941	Not broad	–	15.1 ± 6.1	$- 2 . 13_{+ 0.06}^{- 0.06}$ $Mathematical equation: $ -2.13^{-0.06}_{+0.06} $$
GDS-13197	53.13492	-27.7727	6.342	Not broad	Potential AGN	9.6 ± 3.0	$- 2 . 10_{+ 0.05}^{- 0.06}$ $Mathematical equation: $ -2.10^{-0.06}_{+0.05} $$
GDS-13704	53.12654	-27.8181	5.930	AGN	AGN	14.7 ± 6.9	$- 2 . 68_{+ 0.13}^{- 0.13}$ $Mathematical equation: $ -2.68^{-0.13}_{+0.13} $$
GDS-113719	53.12429	-27.7974	5.445	Not broad	Potential AGN	2.5 ± 1.5	$- 2 . 38_{+ 0.11}^{- 0.12}$ $Mathematical equation: $ -2.38^{-0.12}_{+0.11} $$
GDS-202208	53.16407	-27.7997	5.449	Not broad	SFG	10.1 ± 2.3	$- 1 . 98_{+ 0.04}^{- 0.03}$ $Mathematical equation: $ -1.98^{-0.03}_{+0.04} $$
GDS-210003	53.13184	-27.7738	5.784	Not broad	Potential AGN	16.3 ± 3.3	$- 2 . 41_{+ 0.12}^{- 0.13}$ $Mathematical equation: $ -2.41^{-0.13}_{+0.12} $$
GDS-212506	53.15584	-27.7667	5.350	Not broad	Potential AGN	16.3 ± 8.3	$- 1 . 64_{+ 0.16}^{- 0.16}$ $Mathematical equation: $ -1.64^{-0.16}_{+0.16} $$
GDS-30080593	53.14885	-27.8097	5.960	Not broad	–	50.2 ± 25.2	$- 1 . 99_{+ 0.52}^{- 0.55}$ $Mathematical equation: $ -1.99^{-0.55}_{+0.52} $$
JADES-9104	189.2453	62.25253	6.820	Not broad	–	26.7 ± 13.5	$- 3 . 12_{+ 0.36}^{- 0.39}$ $Mathematical equation: $ -3.12^{-0.39}_{+0.36} $$
JADES-721	189.1153	62.2341	5.180	Not broad	–	21.2 ± 18.5	$- 2 . 49_{+ 0.25}^{- 0.26}$ $Mathematical equation: $ -2.49^{-0.26}_{+0.25} $$
JADES-38147	189.2707	62.14842	5.878	AGN	–	22.8 ± 11.0	$- 1 . 07_{+ 0.32}^{- 0.33}$ $Mathematical equation: $ -1.07^{-0.33}_{+0.32} $$
JADES-167639	53.09188	-27.8807	5.555	AGN	–	19.4 ± 11.2	$- 2 . 14_{+ 0.29}^{- 0.31}$ $Mathematical equation: $ -2.14^{-0.31}_{+0.29} $$
RUBIES-16915	215.0796	52.93826	5.06	AGN	AGN	13.2 ± 3.3	$- 1 . 78_{+ 0.11}^{- 0.11}$ $Mathematical equation: $ -1.78^{-0.11}_{+0.11} $$
RUBIES-45472	214.791	52.79478	5.285	Not broad	–	28.0 ± 16.2	$- 1 . 62_{+ 0.30}^{- 0.30}$ $Mathematical equation: $ -1.62^{-0.30}_{+0.30} $$
RUBIES-64705	214.9143	52.92779	5.296	Not broad	–	140.6 ± 46.5	$- 0 . 89_{+ 0.88}^{- 0.87}$ $Mathematical equation: $ -0.89^{-0.87}_{+0.88} $$
RUBIES-46803	214.868	52.85372	5.187	Not broad	Potential AGN	17.2 ± 8.1	$- 1 . 21_{+ 0.29}^{- 0.29}$ $Mathematical equation: $ -1.21^{-0.29}_{+0.29} $$
RUBIES-49140	214.8922	52.87741	6.683	AGN	AGN	26.0 ± 12.0	$- 1 . 79_{+ 0.26}^{- 0.25}$ $Mathematical equation: $ -1.79^{-0.25}_{+0.26} $$
RUBIES-970128	214.881	52.89121	6.486	Not broad	AGN	26.1 ± 12.4	$- 2 . 30_{+ 0.24}^{- 0.24}$ $Mathematical equation: $ -2.30^{-0.24}_{+0.24} $$
RUBIES-15072	34.26858	-5.28956	5.195	Not broad	AGN	32.4 ± 13.0	$- 2 . 35_{+ 0.37}^{- 0.37}$ $Mathematical equation: $ -2.35^{-0.37}_{+0.37} $$
RUBIES-174752	34.20581	-5.1005	6.043	AGN	AGN	23.4 ± 10.5	$- 2 . 06_{+ 0.12}^{- 0.13}$ $Mathematical equation: $ -2.06^{-0.13}_{+0.12} $$
RUBIES-127820	34.30157	-5.16619	6.992	No Halpha	–	121.3 ± 113.9	$- 3 . 47_{+ 0.76}^{- 0.62}$ $Mathematical equation: $ -3.47^{-0.62}_{+0.76} $$
RUBIES-125637	34.27878	-5.16912	6.419	Not broad	–	45.1 ± 27.7	$- 1 . 49_{+ 0.34}^{- 0.31}$ $Mathematical equation: $ -1.49^{-0.31}_{+0.34} $$
RUBIES-146730	34.32501	-5.14008	5.224	Not broad	Potential AGN	12.1 ± 5.7	$- 2 . 23_{+ 0.18}^{- 0.18}$ $Mathematical equation: $ -2.23^{-0.18}_{+0.18} $$
RUBIES-35376	34.26532	-5.2541	5.316	Not broad	–	16.7 ± 8.0	$- 2 . 18_{+ 0.26}^{- 0.26}$ $Mathematical equation: $ -2.18^{-0.26}_{+0.26} $$
RUBIES-174222	34.4277	-5.10124	6.08	Not broad	–	284.2 ± 223.7	$- 0 . 35_{+ 2.72}^{- 2.43}$ $Mathematical equation: $ -0.35^{-2.43}_{+2.72} $$
RUBIES-37427	34.50494	-5.25798	6.958	AGN	–	40.8 ± 20.2	$- 1 . 01_{+ 0.53}^{- 0.52}$ $Mathematical equation: $ -1.01^{-0.52}_{+0.53} $$
UNCOVER-11254	3.580446	-30.405	6.873	Not broad	Potential AGN	11.6 ± 5.4	$- 2 . 62_{+ 0.11}^{- 0.11}$ $Mathematical equation: $ -2.62^{-0.11}_{+0.11} $$
UNCOVER-33673	3.600114	-30.3658	6.773	Not broad	AGN	53.0 ± 31.8	$- 2 . 05_{+ 0.95}^{- 0.93}$ $Mathematical equation: $ -2.05^{-0.93}_{+0.95} $$
UNCOVER-41225	3.533996	-30.3533	6.770	AGN	AGN	21.4 ± 9.5	$- 2 . 61_{+ 0.51}^{- 0.51}$ $Mathematical equation: $ -2.61^{-0.51}_{+0.51} $$
UNCOVER-51076	3.553695	-30.3301	5.929	Not broad	Potential AGN	13.0 ± 2.1	$- 1 . 13_{+ 0.38}^{- 0.38}$ $Mathematical equation: $ -1.13^{-0.38}_{+0.38} $$
CAPERS-35805	150.0554	2.291588	6.532	AGN	Potential AGN	18.0 ± 8.3	$- 2 . 16_{+ 0.10}^{- 0.10}$ $Mathematical equation: $ -2.16^{-0.10}_{+0.10} $$
CAPERS-52661	150.1418	2.193836	6.764	AGN	AGN	31.1 ± 12.2	$- 1 . 623_{+ 0.15}^{- 0.16}$ $Mathematical equation: $ -1.623^{-0.16}_{+0.15} $$
CAPERS-17158	150.1453	2.384542	5.355	Not broad	Potential AGN	9.8 ± 4.7	$- 2 . 21_{+ 0.15}^{- 0.15}$ $Mathematical equation: $ -2.21^{-0.15}_{+0.15} $$
CAPERS-39643	150.1077	2.271908	6.047	Not broad	–	23.8 ± 11.5	$- 2 . 38_{+ 0.26}^{- 0.27}$ $Mathematical equation: $ -2.38^{-0.27}_{+0.26} $$
CAPERS-49388	150.1393	2.214673	5.507	Not broad	AGN	7.2 ± 2.1	$- 2 . 21_{+ 0.05}^{- 0.05}$ $Mathematical equation: $ -2.21^{-0.05}_{+0.05} $$
CAPERS-39948	150.1043	2.270252	5.298	Not broad	AGN	34.9 ± 16.3	$- 1 . 79_{+ 0.42}^{- 0.42}$ $Mathematical equation: $ -1.79^{-0.42}_{+0.42} $$
CAPERS-49845	150.1399	2.212099	5.126	Not broad	AGN	20.4 ± 7.0	$- 2 . 17_{+ 0.15}^{- 0.15}$ $Mathematical equation: $ -2.17^{-0.15}_{+0.15} $$
CAPERS-11227	150.1195	2.418575	5.24	Not broad	–	48.0 ± 16.1	$- 2 . 96_{+ 0.52}^{- 0.53}$ $Mathematical equation: $ -2.96^{-0.53}_{+0.52} $$
CAPERS-101195	150.0616	2.269404	5.989	Not broad	AGN	51.6 ± 22.3	$- 3 . 02_{+ 0.65}^{- 0.63}$ $Mathematical equation: $ -3.02^{-0.63}_{+0.65} $$
CAPERS-9244	214.9857	52.95623	5.203	AGN	AGN	24.2 ± 9.3	$- 2 . 17_{+ 0.10}^{- 0.10}$ $Mathematical equation: $ -2.17^{-0.10}_{+0.10} $$
CAPERS-19346	214.8868	52.82463	6.193	Not broad	AGN	22.2 ± 7.9	$- 2 . 22_{+ 0.16}^{- 0.16}$ $Mathematical equation: $ -2.22^{-0.16}_{+0.16} $$
CAPERS-21137	214.8773	52.80983	5.679	Not broad	–	22.8 ± 10.2	$- 2 . 08_{+ 0.23}^{- 0.25}$ $Mathematical equation: $ -2.08^{-0.25}_{+0.23} $$
CAPERS-80959	214.935	52.9326	6.517	Not broad	AGN	162.3 ± 106.7	$- 3 . 33_{+ 1.43}^{- 0.96}$ $Mathematical equation: $ -3.33^{-0.96}_{+1.43} $$
CAPERS-22908	214.8713	52.79732	5.687	Not broad	–	18.1 ± 6.8	$- 2 . 81_{+ 0.47}^{- 0.49}$ $Mathematical equation: $ -2.81^{-0.49}_{+0.47} $$
CAPERS-206147	214.8607	52.78599	5.68	Not broad	Potential AGN	13.7 ± 4.8	$- 2 . 03_{+ 0.15}^{- 0.15}$ $Mathematical equation: $ -2.03^{-0.15}_{+0.15} $$
CAPERS-12328	214.813	52.81698	5.276	Not broad	–	23.7 ± 12.0	$- 1 . 96_{+ 0.22}^{- 0.21}$ $Mathematical equation: $ -1.96^{-0.21}_{+0.22} $$
CAPERS-27271	214.8782	52.78325	5.283	Not broad	Potential AGN	16.0 ± 3.9	$- 2 . 41_{+ 0.14}^{- 0.14}$ $Mathematical equation: $ -2.41^{-0.14}_{+0.14} $$
CAPERS-62484	214.8562	52.81844	6.281	Not broad	–	82.4 ± 54.9	$- 1 . 08_{+ 1.50}^{- 1.45}$ $Mathematical equation: $ -1.08^{-1.45}_{+1.50} $$
CAPERS-22230	214.99	52.88462	5.088	Not broad	AGN	19.7 ± 9.1	$- 2 . 35_{+ 0.20}^{- 0.19}$ $Mathematical equation: $ -2.35^{-0.19}_{+0.20} $$
CAPERS-41455	215.0059	52.8749	6.913	Not broad	Potential AGN	51.3 ± 25.6	$- 2 . 42_{+ 0.32}^{- 0.33}$ $Mathematical equation: $ -2.42^{-0.33}_{+0.32} $$
CEERS-1334	214.7684	52.71764	5.498	AGN	Potential AGN	17.2 ± 4.7	$- 1 . 67_{+ 0.14}^{- 0.14}$ $Mathematical equation: $ -1.67^{-0.14}_{+0.14} $$
GDS-5093	53.12417	-27.8745	5.398	Not broad	Potential AGN	13.5 ± 3.1	$- 2 . 10_{+ 0.10}^{- 0.10}$ $Mathematical equation: $ -2.10^{-0.10}_{+0.10} $$
j0252m0503-376	43.06545	-5.01028	6.711	Not broad	AGN	33.4 ± 21.4	$- 2 . 62_{+ 0.49}^{- 0.49}$ $Mathematical equation: $ -2.62^{-0.49}_{+0.49} $$
macsj0647-1120	101.9015	70.19888	5.236	Not broad	–	24.1 ± 12.7	$- 2 . 26_{+ 0.30}^{- 0.31}$ $Mathematical equation: $ -2.26^{-0.31}_{+0.30} $$
PEARLS-184	265.0099	69.01782	6.277	Not broad	–	4.1 ± 1.4	$- 2 . 12_{+ 0.04}^{- 0.04}$ $Mathematical equation: $ -2.12^{-0.04}_{+0.04} $$
RUBIES-157664	34.20792	-5.12481	5.312	Not broad	AGN	282.4 ± 266.2	$- 1 . 35_{+ 0.90}^{- 0.82}$ $Mathematical equation: $ -1.35^{-0.82}_{+0.90} $$

Notes. This table catalogs the properties of the C III] emitter sample, including AGN diagnostics, emission-line equivalent widths

and UV β slopes. The z_spec uncertainties range between 0.001 and 0.007. The galaxies below the dotted line are those for which we do not have the photometry. A – means that the galaxy could not be placed on the plot.

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