**Table 1:** Number of quasars cross-identified between the recent catalog of Véron Cetty & Véron (2003) and the three categories of catalogs used in the construction of the ICRF: 212 defining sources, 294 candidate sources and 102 other sources. Two different angular thresholds have been chosen for the cross-identification: 2'' and 4''. The rms concern the difference in the positions, in arc-seconds, for the cross-identified sources.
Catalog	Threshold	Defining	Candidate	Other
	('')	ICRF	ICRF	ICRF
Quasars	4	132/212	160/294	69/102
		(62.2%)	(54.4%)	(67.6%)
rms ('') $\alpha$ / $\delta$		0.82/0.74	0.91/0.75	0.69/0.66
BL LAC	4	28/212	24/294	11/102
		(13.2%)	(8.2%)	(10.7%)
rms ('') $\alpha$ / $\delta$		0.58/0.56	0.88/0.55	0.86/0.55
Active galaxies	4	17/212	22/294	11/102
		(8.0%)	(7.5%)	(10.7%)
rms ('') $\alpha$ / $\delta$		0.79/0.66	0.93/0.56	0.96/0.74
All objects	4	177/212	206/294	91/102
rms ('') $\alpha$ / $\delta$		(83.4%)	(70.1%)	(89.2%)
Quasars	2	128/212	152/294	69/102
		(60.4%)	(51.7%)	(67.6%)
rms ('') $\alpha$ / $\delta$		0.74/0.65	0.84/0.68	0.69/0.66
BL LAC	2	28/212	24/294	11/102
		(13.2%)	(8.2%)	(10.7%)
rms ('') $\alpha$ / $\delta$		0.58/0.56	0.88/0.55	0.86/0.55
Active galaxies	2	17/212	21/294	10/102
		(8.0%)	(7.1%)	(9.8%)
rms ('') $\alpha$ / $\delta$		0.79/0.66	0.85/0.67	0.59/0.71
All objects	2	173/212	205/294	90/102
rms ('') $\alpha$ / $\delta$		(81.6%)	(67.0%)	(88.2%)

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