LQAC-4: Fourth release of the Large Quasar Astrometric Catalogue - Compilation of 443 725 objects including cross-identifications with Gaia DR1

Home

All issues

Volume 614 (June 2018)

A&A, 614 (2018) A140

Full HTML

Open Access

Table 1

Number of cross-matches between the LQAC-4 and the Gaia DR1 as a function of the search radius ρ.

Search radius	Number of cross-	%	%
ρ (′′)	identifications	w.r.t.	w.r.t.
	LQAC4-Gaia	ρ = 1′′	LQAC4
0.1	195 506	78.49	44.06
0.2	220 795	88.65	49.76
0.3	230 338	92.48	51.91
0.4	238 414	95.72	53.73
0.5	242 294	97.27	54.60
0.6	244 411	98.12	55.08
0.7	245 838	98.70	55.40
0.8	247 046	99.18	55.68
0.9	248 111	99.61	55.92
1.0	249 071	100.00	56.13
1.2	250 687	100.65	56.49
1.4	251 888	101.13	56.76
1.6	252 715	101.46	56.95
1.8	253 294	101.69	57.08
2.0	253 780	101.89	57.19
2.2	254 255	102.08	57.30
2.4	254 666	102.25	57.39
2.6	255 061	102.40	57.48
2.8	255 481	102.57	57.57
3.0	255 914	102.75	57.67

Notes. The adopted threshold to admit a common identification is ρ = 1′′. The third column gives the percentage of cross-matches with respect to this threshold, the fourth one gives the percentage with respect to the whole LQAC-4 sample.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.