Table 3: Results from the fitting. The fitting regions and signal-to-noise per pixel in the continuum is listed. Best-fit velocity dispersions normalized to the same physical aperture (  kpc) and their confidence intervals are shown. "AGN cont.'' indicates that there is too much AGN contamination in the spectrum to obtain a reliable fit.

	Fitting region	S/N		68% CI	95% CI	Fitting region	S/N		68% CI	95% CI
	Å		km s-1	km s-1	km s-1	Å		km s-1	km s-1	km s-1
3C 20	AGN cont.	4	...	...	...	too noisy	1	...	...	...
3C 28	AGN cont.	6	...	...	...	too noisy	1	...	...	...
3C 31	5220-5650	25	247	[246, 251]	[244, 252]	4000-4500	7	260	[255, 266]	[248, 273]
3C 33	5220-5420	11	188	[178, 199]	[168, 210]	AGN cont.	6	...	...	...
3C 35	5090-5390	6	224	[215, 233]	[206, 243]	3800-4250	3	206	[191, 224]	[176, 242]
3C 66Ba	poor fit	18	...	...	...	4000-4470	6	165	[155, 174]	[146, 185]
3C 76.1	5220-5560	18	193	[188, 198]	[183, 203]	4000-4470	7	192	[174, 209]	[157, 225]
3C 98	5220-5570	17	136	[128, 143]	[120, 152]	4000-4420	7	159	[149, 170]	[140, 181]
3C 388	5150-5740	15	232	[211, 243]	[195, 259]	too noisy	2	...	...	...
3C 381	5100-5410	9	221	[212, 231]	[202, 241]	too noisy	1	...	...	...
3C 401	5100-5230	5	136	[95, 166]	[65, 284]	too noisy	1	...	...	...
3C 433	5220-5700	10	128	[121, 131]	[115, 136]	too noisy	1	...	...	...
3C 442A	5100-5590	15	198	[188, 208]	[193, 203]	4000-4450	6	216	[207, 225]	[198, 234]
3C 449	5100-5650	17	263	[258, 267]	[254, 271]	3800-4500	6	192	[187, 198]	[181, 204]
3C 452	5120-5310	7	289	[284, 296]	[274, 307]	AGN cont.	4	...	...	...
3C 465	5220-5570	19	338	[332, 344]	[326, 350]	4000-4400	7	362	[351, 375]	[340, 388]
4C 11.71	5220-5600	8	227	[224, 232]	[220, 234]	4000-4450	6	250	[242, 259]	[234, 267]
4C 12.03	5100-5420	8	245	[231, 257]	[219, 271]	too noisy	1	...	...	...
4C 35.40	5220-5570	16	205	[198, 205]	[190, 213]	4000-4420	6	193	[184, 200]	[176, 209]

^a Despite good signal-to-noise in the red part, for unknown reasons, an acceptable fit could not be obtained.