High-z radio quasars in RACS - I. Selection, identification, and multi-wavelength properties

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Table D.1.

Multi-wavelength properties of the z > 5 RACS quasars.

Name	z	log(L_2500 Å)	log(L_4400 Å)	log(L_5GHz)	log(νL_1.4GHz)	log(R)	$α_{low}^{r}$ ${\alpha}_{\mathrm{low}}^{\mathrm{r}}$	$α_{high}^{r}$ ${\alpha}_{\mathrm{high}}^{\mathrm{r}}$	ν_break	${\tilde{α}}_{ox}$ $\tilde{\alpha}_{\mathrm{ox}}$
		erg s⁻¹ Hz⁻¹	erg s⁻¹ Hz⁻¹	erg s⁻¹ Hz⁻¹	erg s⁻¹				GHz
RACS J0001-03	5.27	31.04±0.03	31.19±0.04	32.73±0.09	41.99±0.09	1.54±0.10	0.20 $_{- 0.07}^{+ 0.07}$ $_{-0.07}^{+0.07}$	–	–	–
RACS J0110–39	5.08	30.74±0.04	30.80±0.06	33.88±0.07	43.37±0.07	3.08±0.09	0.63 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	–	–	> 0.94¹
RACS J0131–03	5.18	32.11±0.03	32.27±0.03	33.99±0.07	42.61±0.07	1.72±0.08	-0.95 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	0.58 $_{- 0.05}^{+ 0.05}$ $_{-0.05}^{+0.05}$	2.73 $_{- 0.10}^{+ 0.10}$ $_{-0.10}^{+0.10}$	1.32±0.04²
RACS J0141–54	5.00	30.77±0.03	30.85±0.05	34.88±0.07	44.19±0.07	4.03±0.0	0.22 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	0.41 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	0.52 $_{- 0.06}^{+ 0.06}$ $_{-0.06}^{+0.06}$	1.34±0.07³
RACS J0202–17	5.57	31.82±0.03	31.94±0.03	33.99±0.07	43.45±0.07	2.11±0.08	0.57 $_{- 0.01}^{+ 0.02}$ $_{-0.01}^{+0.02}$	−0.07 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	1.35 $_{- 0.07}^{+ 0.06}$ $_{-0.07}^{+0.06}$	1.39±0.02⁴
RACS J0209–56	5.61	31.04±0.03	30.93±0.04	33.93±0.07	43.05±0.07	2.86±0.08	-0.04 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	0.29 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	1.18 $_{- 0.16}^{+ 0.16}$ $_{-0.16}^{+0.16}$	1.22±0.03⁴
RACS J0309+27	6.10	31.02±0.13	31.17±0.05	34.32±0.07	43.65±0.07	3.15±0.09	0.32 $_{- 0.03}^{+ 0.02}$ $_{-0.03}^{+0.02}$	0.8 $_{- 0.07}^{+ 0.07}$ $_{-0.07}^{+0.07}$	0.93 $_{- 0.08}^{+ 0.07}$ $_{-0.08}^{+0.07}$	1.02±0.03³
RACS J0320–35	6.13	31.15±0.03	31.16±0.04	33.35±0.07	42.91±0.07	2.03±0.08	0.72 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	–	–	1.21±0.03⁶
RACS J0322–18	6.09	31.13±0.03	31.14±0.04	33.15±0.07	42.65±0.07	1.95±0.08	0.65 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	–	–	1.30±0.03⁷
RACS J0341−00	5.68	31.20±0.04	31.26±0.04	33.15±0.14	42.50±0.14	1.89±0.15	0.38 $_{- 0.16}^{+ 0.14}$ $_{-0.16}^{+0.14}$	–	–	1.27±0.04⁸
RACS J0741+25	5.19	32.01±0.03	32.20±0.03	33.01±0.07	41.92±0.07	0.82±0.08	-0.42 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	0.56 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	3.8 $_{- 0.08}^{+ 0.08}$ $_{-0.08}^{+0.08}$	1.61±0.09⁹
RACS J0836+00	5.77	31.92±0.03	32.09±0.03	33.12±0.13	42.19±0.13	1.03±0.13	-0.15 $_{- 0.14}^{+ 0.13}$ $_{-0.14}^{+0.13}$	1.44 $_{- 0.14}^{+ 0.14}$ $_{-0.14}^{+0.14}$	0.92 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	1.74±0.11¹⁰
RACS J0901+16	5.63	31.03±0.03	31.03±0.06	33.44±0.08	42.82±0.08	2.41±0.10	0.42 $_{- 0.06}^{+ 0.06}$ $_{-0.06}^{+0.06}$	–	–	1.30±0.06¹¹
RACS J1011–01	5.56	30.81±0.04	30.92±0.05	33.65±0.22	42.78±0.22	2.58±0.23	-0.44 $_{- 0.19}^{+ 0.33}$ $_{-0.19}^{+0.33}$	0.4 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	0.41 $_{- 0.26}^{+ 0.28}$ $_{-0.26}^{+0.28}$	> 1.32⁴
RACS J1013+35	5.03	31.14±0.03	31.21±0.04	32.75±0.07	42.01±0.07	1.54±0.08	0.19 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–	–	> 0.99¹
RACS J1026+25	5.25	31.31±0.04	31.40±0.04	35.11±0.07	44.38±0.07	3.71±0.08	0.22 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	0.48 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	1.43 $_{- 0.11}^{+ 0.22}$ $_{-0.11}^{+0.22}$	1.15±0.01¹²
RACS J1034+20	5.01	31.44±0.03	31.68±0.03	33.30±0.09	42.18±0.09	1.62±0.09	-0.48 $_{- 0.08}^{+ 0.08}$ $_{-0.08}^{+0.08}$	0.21 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	0.88 $_{- 0.07}^{+ 0.08}$ $_{-0.07}^{+0.08}$	> 1.10¹
RACS J1111+05	5.24	31.35±0.03	31.83±0.03	33.59±0.27	42.80±0.27	1.76±0.27	-0.3 $_{- 0.41}^{+ 0.24}$ $_{-0.41}^{+0.24}$	0.78 $_{- 0.09}^{+ 0.09}$ $_{-0.09}^{+0.09}$	0.50 $_{- 0.12}^{+ 0.33}$ $_{-0.12}^{+0.33}$	> 1.07¹
RACS J1146+40	5.01	31.55±0.03	31.71±0.03	33.56±0.07	42.27±0.07	1.85±0.08	-0.78 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	0.31 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	1.59 $_{- 0.06}^{+ 0.07}$ $_{-0.06}^{+0.07}$	1.30±0.06¹³
RACS J1427+33	6.12	31.23±0.05	31.52±0.03	33.17±0.07	42.62±0.07	1.65±0.08	0.56 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	1.89 $_{- 0.72}^{+ 0.72}$ $_{-0.72}^{+0.72}$	1.25 $_{- 0.14}^{+ 0.09}$ $_{-0.14}^{+0.09}$	–
RACS J1621+11	5.05	30.96±0.07	31.10±0.04	32.81±0.21	42.25±0.21	1.71±0.21	0.54 $_{- 0.26}^{+ 0.26}$ $_{-0.26}^{+0.26}$	-1.08 $_{- 0.16}^{+ 0.16}$ $_{-0.16}^{+0.16}$	1.39 $_{- 0.14}^{+ 0.1}$ $_{-0.14}^{+0.1}$	–
RACS J1629+10	5.00	31.02±0.04	31.04±0.05	34.46±0.07	43.91±0.07	3.42±0.09	0.54 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	–	–	1.09±0.04¹²
RACS J1702+13	5.46	31.01±0.04	31.01±0.05	33.69±0.10	42.88±0.10	2.68±0.11	0.07 $_{- 0.13}^{+ 0.07}$ $_{-0.13}^{+0.07}$	0.31 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	0.78 $_{- 0.21}^{+ 0.11}$ $_{-0.21}^{+0.11}$	0.90±0.06¹⁴
RACS J2020−62	5.72	31.76±0.03	31.93±0.03	33.13±0.08	42.64±0.08	1.20±0.09	0.66 $_{- 0.06}^{+ 0.05}$ $_{-0.06}^{+0.05}$	–	–	1.57±0.07¹⁵
RACS J2201+23	5.83	31.23±0.03	31.33±0.04	32.99±0.07	42.38±0.07	1.66±0.08	0.44 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–	–	–
RACS J2240–10	5.20	31.00±0.03	31.08±0.05	34.23±0.07	43.58±0.07	3.15±0.09	0.37 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	1.17 $_{- 0.15}^{+ 0.15}$ $_{-0.15}^{+0.15}$	1.39 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–
RACS J2244–20	5.41	31.16±0.03	31.36±0.04	32.66±0.13	41.58±0.13	1.30±0.14	-0.41 $_{- 0.14}^{+ 0.14}$ $_{-0.14}^{+0.14}$	–	–	–
RACS J2252–51	5.18	31.61±0.03	31.80±0.03	33.70±0.11	42.48±0.11	1.90±0.11	-0.67 $_{- 0.11}^{+ 0.10}$ $_{-0.11}^{+0.10}$	1.01 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	1.9 $_{- 0.08}^{+ 0.09}$ $_{-0.08}^{+0.09}$	> 1.14¹
RACS J2303–23	5.03	31.37±0.03	31.34±0.04	33.66±0.14	42.86±0.14	2.32±0.15	-0.19 $_{- 0.17}^{+ 0.14}$ $_{-0.17}^{+0.14}$	0.59 $_{- 0.08}^{+ 0.08}$ $_{-0.08}^{+0.08}$	0.52 $_{- 0.12}^{+ 0.17}$ $_{-0.12}^{+0.17}$	–
RACS J2329–15	5.84	30.99±0.05	31.11±0.05	34.19±0.07	43.78±0.07	3.08±0.09	0.82 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	–	–	1.36±0.06¹⁶
RACS J2329+30	5.24	31.61±0.03	31.68±0.03	33.38±0.07	42.59±0.07	1.70±0.08	0.10 $_{- 0.02}^{+ 0.03}$ $_{-0.02}^{+0.03}$	−0.94 $_{- 0.06}^{+ 0.06}$ $_{-0.06}^{+0.06}$	1.33 $_{- 0.10}^{+ 0.09}$ $_{-0.10}^{+0.09}$	–
RACS J2329–20	5.04	31.93±0.03	32.09±0.03	33.14±0.07	42.68±0.07	1.05±0.08	0.71 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–	–	–
RACS J2344+16	5.00	31.81±0.03	31.96±0.03	33.86±0.07	42.82±0.07	1.90±0.08	-0.35 $_{- 0.04}^{+ 0.03}$ $_{-0.04}^{+0.03}$	0.46 $_{- 0.07}^{+ 0.07}$ $_{-0.07}^{+0.07}$	0.94 $_{- 0.10}^{+ 0.07}$ $_{-0.10}^{+0.07}$	–

Notes. (Col. 1) Name of the source. Objects highlighted in boldface are the ones we selected with the criteria outlined in Sec. 2; (Col. 2) spectroscopic redshift; (Col. 3 and 4) UV (25500Å) and optical (4400Å) rest-frame luminosity computed from the observed magnitudes in the z and W1 filters; (Col. 5 and 6) Rest-frame radio luminosity at 5 GHz and integrated radio luminosity at 1.4 GHz computed from the best-fit radio spectrum of each source; (Col. 7) radio-loudness parameter, defined as R = S_5 GHz/S_4400 Å; (Col. 8 and 9) Best-fit spectral indices before and after the break frequency. Only value is shown for objects where a single power law was preferred; (Col. 10) best-fit break frequency, in GHz and in the observed frame, for systems where a broken power law was preferred; (Col. 11) ${\tilde{α}}_{ox}$ $\tilde{\alpha}_{\mathrm{ox}}$ parameter, defined as ${\tilde{α}}_{ox} = 0.303 \times \log (L_{10 keV} / L_{2500 Å})$ $\tilde{\alpha}_{\mathrm{ox}}=0.303\times\mathrm{log(L_{\mathrm{10keV}}/L_{2500\AA})}$ . Names marked in boldface indicate sources selected using the criteria described in the text. The references for the X-ray information are as follows: (1) Merloni et al. (2024); (2) An & Romani (2020); (3) Belladitta et al. (2019); (4) Ighina et al. (2024b); (5) Moretti et al. (2021); (6) Ighina et al. in preparation; (7) This work; (8) Zuo et al. (2024); (9) Wu et al. (2013); (10) Wolf et al. (2021); (11) Caccianiga et al. (2024); (12) Ighina et al. (2019); (13) Ghisellini et al. (2013); (14) Khorunzhev et al. (2021); (15) Wolf et al. (2024); (16) Connor et al. (2021).

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