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

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Table D.2.

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

Name	z	log(L $_{2500 Å}$ $_{2500\AA}$ )	log(L $_{4400 Å}$ $_{4400\AA}$ )	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 J0036–37	4.95	31.20±0.03	31.46±0.03	32.78±0.07	42.21±0.07	1.32±0.08	0.50 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–	–	> 1.03
RACS J0056–05	4.82	30.80±0.04	31.03±0.04	32.77±0.09	42.38±0.09	1.74±0.10	0.82 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	–	–	–
RACS J0127–44	4.96	30.95±0.03	30.99±0.04	33.94±0.07	43.26±0.07	2.95±0.08	0.32 $_{- 0.14}^{+ 0.14}$ $_{-0.14}^{+0.14}$	0.07 $_{- 0.06}^{+ 0.06}$ $_{-0.06}^{+0.06}$	2.82 $_{- 0.49}^{+ 0.55}$ $_{-0.49}^{+0.55}$	1.12±0.08
RACS J0606–27	4.89	31.16±0.03	31.41±0.03	33.77±0.07	43.29±0.07	2.36±0.08	0.68 $_{- 0.11}^{+ 0.10}$ $_{-0.11}^{+0.10}$	–	–	> 1.05
RACS J1042+04	4.74	30.81±0.04	30.90±0.05	32.85±0.09	42.22±0.09	1.95±0.10	0.39 $_{- 0.17}^{+ 0.14}$ $_{-0.17}^{+0.14}$	–	–	> 0.94
RACS J1321+24	4.78	30.81±0.04	30.90±0.05	33.28±0.07	42.68±0.07	2.38±0.09	0.46 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	1.34 $_{- 0.39}^{+ 0.39}$ $_{-0.39}^{+0.39}$	1.60 $_{- 0.33}^{+ 0.33}$ $_{-0.33}^{+0.33}$	–
RACS J1322–13	4.70	31.05±0.03	31.22±0.04	34.22±0.07	43.59±0.07	3.01±0.08	0.42 $_{- 0.02}^{+ 0.03}$ $_{-0.02}^{+0.03}$	−0.27 $_{- 0.03}^{+ 0.03}$ $_{-0.03}^{+0.03}$	1.66 $_{- 0.08}^{+ 0.10}$ $_{-0.08}^{+0.10}$	1.02±0.03
RACS J1426–11	4.73	30.80±0.04	30.84±0.07	33.61±0.07	43.59±0.07	2.77±0.10	0.76 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–	–	> 0.97
RACS J1505–06	4.53	30.93±0.04	31.07±0.04	33.27±0.09	42.53±0.09	2.20±0.10	0.20 $_{- 0.04}^{+ 0.03}$ $_{-0.04}^{+0.03}$	–	–	> 1.05
RACS J1634–01	4.88	31.10±0.03	31.13±0.04	32.99±0.09	42.26±0.09	1.86±0.10	0.23 $_{- 0.04}^{+ 0.04}$ $_{-0.04}^{+0.04}$	–	–	–
RACS J1638+08	4.77	31.10±0.03	31.31±0.03	33.35±0.10	42.38±0.10	2.04±0.11	−0.22 $_{- 0.09}^{+ 0.08}$ $_{-0.09}^{+0.08}$	–	–	–
RACS J1645+38	4.69	30.74±0.04	30.79±0.05	32.86±0.07	42.01±0.07	2.07±0.09	0.01 $_{- 0.01}^{+ 0.01}$ $_{-0.01}^{+0.01}$	–	–	–
RACS J2142–61	4.74	31.31±0.03	31.43±0.03	33.10±0.12	42.42±0.12	1.67±0.12	0.31 $_{- 0.02}^{+ 0.02}$ $_{-0.02}^{+0.02}$	–	–	> 1.06

Notes. (Col. 1) Name of the source; (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) 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 ${\tilde{α}}_{ox} = 0.303 \times \log (L_{10 keV} / L_{2500 Å})$ $\tilde{\alpha}_{\mathrm{ox}}=0.303\times\mathrm{log(L_{\mathrm{10keV}}/L_{2500\AA})}$ . The X-ray information is from Merloni et al. (2024).

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