Gaia Data Release 1 - Cross-match with external catalogues. Algorithm and results

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Volume 607 (November 2017)

A&A, 607 (2017) A105

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Gaia Data Release 1

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Table 5

BestNeighbour statistics: Min/Max values of relevant output fields in BestNeighbour tables.

Catalogue	Angular	% with	Number of	% with single	Number	% with	BestNeighbour	Sources
	distance	^a	neighbours	neighbour	of mates	no mates	multiplicity	with m> 1^b
	(arcsec)

	max		max		max		max

UCAC4	9.87	86.95	4	99.64	12	85.96	1	0
GSC 2.3	17.86	60.11	18	90.04	18	70.72	16	93 964
PPMXL	6.14	70.89	12	89.26	7	86.85	2	6
SDSS DR9	51.88	98.54	8	98.60	61	99.48	1	0
URAT-1	2.12	99.80	2	99.99	3	99.75	1	0
2MASS	6.82	85.32	5	98.92	6	88.03	2	8
allWISE	181.11	77.60	3	99.99	20	99.15	1	0

Notes. The fraction of Gaia matched stars closer than 0.5 arcsec, those without mates and with a single neighbour, and the number of Gaia matched sources with no multiplicity are also listed.

^(a)

d = angular distance.

^(b)

m = BestNeighbour multiplicity.

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