**Table 1:** FIRST coordinates, flux densities and spectral indices of the sources in Subsample Two.
	RA	Dec	$F_{365~{\rm MHz}}$	$F_{1.4~{\rm GHz}}$	$F_{4.85~{\rm GHz}}$	$\alpha_{365~{\rm MHz}}^{1.4~{\rm GHz}}$	$\alpha_{1.4~{\rm GHz}}^{4.85~{\rm GHz}}$	$F_{1.655~{\rm GHz}}$
Source name	(J2000)		[Jy]					[Jy]
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
0744+291 $^\ast$	07 48 05.332	29 03 22.54	1.25	0.48	0.17	-0.71	-0.83	0.41
0747+314	07 50 12.318	31 19 47.52	2.62	1.05	0.35	-0.68	-0.89	0.90
0811+360	08 14 49.068	35 53 49.70	1.71	0.58	0.17	-0.80	-0.99	0.49
0853+291	08 56 01.169	28 58 35.06	2.28	0.63	0.19	-0.95	-0.97	0.54
0902+416	09 05 22.197	41 28 39.65	1.10	0.48	0.17	-0.61	-0.86	0.42
0922+322 $^\ast$	09 25 32.727	31 59 52.87	1.80	0.53	0.20	-0.91	-0.79	0.47
1123+340	11 26 23.674	33 45 26.64	3.80	1.32	0.38	-0.79	-1.01	1.11
1232+295	12 34 54.387	29 17 43.79	1.10	0.46	0.16	-0.65	-0.84	0.40
1242+364	12 44 49.679	36 09 25.53	2.75	0.78	0.21	-0.94	-1.07	0.65
1251+308	12 53 25.750	30 36 35.03	1.03	0.45	0.20	-0.61	-0.66	0.41
1343+386	13 45 36.948	38 23 12.62	1.81	0.85	0.44	-0.56	-0.53	0.78
1401+353 $^\ast$	14 03 19.238	35 08 11.88	2.27	0.63	0.18	-0.96	-1.01	0.53
1441+409	14 42 59.307	40 44 28.79	1.51	0.97	0.30	-0.33	-0.94	0.83
1601+382 $^\ast$	16 03 35.150	38 06 42.93	0.99	0.43	0.20	-0.62	-0.61	0.39
1619+378	16 21 11.290	37 46 04.94	1.62	0.64	0.20	-0.69	-0.94	0.55
1632+391	16 34 02.910	39 00 00.18	1.98	0.93	0.37	-0.56	-0.74	0.82
1656+391	16 58 22.172	39 06 25.55	1.34	0.65	0.24	-0.53	-0.80	0.57
1709+303	17 11 19.939	30 19 17.67	1.83	1.03	0.37	-0.43	-0.83	0.90
1717+315	17 19 30.062	31 28 48.12	1.06	0.45	0.15	-0.63	-0.87	0.39

$^\ast$ Sources with names marked with an asterisk were not followed-up using VLBI.
Description of the columns: Col. (1): source name in the IAU format; Col. (2): source right ascension (J2000) extracted from FIRST; Col. (3): source declination (J2000) extracted from FIRST; Col. (4): total flux density at 365 MHz extracted from Texas Catalogue; Col. (5): total flux density at 1.4 GHz extracted from FIRST; Col. (6): total flux density at 4.85 GHz extracted from GB6; Col. (7): spectral index ( $S\propto\nu^{\alpha}$ ) between 365 and 1400 MHz calculated using flux densities in Cols. (4) and (5); Col. (8): spectral index between 1.4 and 4.85 GHz calculated using flux densities in Cols. (5) and (6); Col. (9): estimated total flux density at 1.655 GHz interpolated from data in Cols. (5) and (6).

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