Gaia Data Release 2 - Cross-match with external catalogues: algorithms and results

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Volume 621 (January 2019)

A&A, 621 (2019) A144

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Gaia Data Release 2

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Table 6

BestNeighbour statistics: max values of relevant output fields in BestNeighbour tables.

Catalogue	Angular	Number of	% with single	Number	% with	BestNeighbour	Sources
	distance	neighbours	neighbour	of mates	No Mates	multiplicity	with m > 1^a
	(arcsec)
	max	max		max		max
Pan-STARRS1 DR1	5.23	6	98.56	13	99.42	1	0
GSC 2.3	8.96	16	96.99	25	77.65	16	120 344
PPMXL	4.02	8	89.35	14	87.78	2	2
SDSS DR9	52.10	6	99.49	80	99.77	3	2
URAT-1	2.12	3	99.99	3	99.84	1	0
2MASS	5.01	3	99.78	11	94.25	2	10
allWISE	181.15	3	99.99	24	98.39	1	0
APASS DR9	11.75	56	86.53	59	58.74	2	8
HIPPARCOS2	1.67	2	99.40	N/A	N/A	N/A	0
Tycho-2	1.94	3	99.51	N/A	N/A	N/A	0
RAVE 5	3.21	11	89.91	N/A	N/A	N/A	0

Notes. The fraction of Gaia matched sources without mates and with a single neighbour as well as the number of Gaia matched sources with no multiplicity are also listed. ^(a) m = BestNeighbour multiplicity.

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