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Table 1

Reference catalogues used for cross-correlation.

Catalogue Type Reference σref(″) N cat a N ref b N XMM c C ref d C XMM e
Einstein X-ray 1 40f 50 48 154 45.1 ± 1.6 131 ± 13
Einstein g X-ray 1 40f 50 26 27 6.1 ± 2.1 6.5 ± 2.4
ROSAT PSPC X-ray 2 10i 353 282 353 40.9 ± 4.5 55.5 ± 7.4
ROSAT PSPCh X-ray 2 10i 353 236 264 15.3 ± 4.0 17.9 ± 4.6
ROSAT HRI X-ray 3 2.6i 109 76 78 2.4 ± 1.8 2.4 ± 1.8
ASCA X-ray 4 18.6f 83 69 111 33.1 ± 4.2 42.5 ± 6.1
Chandra Wing Survey X-ray 5 1.02i 393 242 240 2.3 ± 1.6 2.3 ± 1.5
Chandra deep fields X-ray 6 0.66i 394 85 85 1.8 ± 1.4 1.7 ± 1.3
Chandra NGC 346 X-ray 7 0.30i 75 41 41 0.58 ± 0.64 0.63 ± 0.70
CSC (release 1.1) X-ray 8 1.30i 496 368 373 8.2 ± 2.4 9.4 ± 3.4
MCPS opt. 9 0.3 2 872 224 10 484 2604 10 082 ± 75 2431 ± 21
Tycho-2 opt. 10 0.078i 321 41 41 1.5 ± 1.1 1.5 ± 1.2
GSC (version 2.3.2) opt. 11 0.43i 855 524 3476 2099 3045 ± 42 1752 ± 20
2MASS NIR 12 0.15i 159 491 923 743 565 ± 27 427 ± 17
2MASX NIR 12 4.4i 223 26 26 8.5 ± 2.4 9.0 ± 2.7
DENIS MC NIR 13 0.47i 94 357 609 540 364 ± 19 303 ± 15
DENIS (3rd release) NIR 14 0.3 438 517 2058 1043 1477 ± 55 737 ± 18
IRSF Sirius NIR 15 0.1 1 855 973 8426 2407 6500 ± 110 1914 ± 22
S3MC IR 16 1, 3, 6j 400 735 3403 1711 2193 ± 40 1108 ± 17
ATCA RCS radio 17, 18 1.0 301 31 31 1.6 ± 1.2 1.6 ± 1.2
SUMSS (version 2.1) radio 19, 20 3.0i 246 46 47 5.3 ± 2.2 5.5 ± 2.3
MA93 Hα 21 2.0f 1805 63 62 18.6 ± 3.0 18.2 ± 3.4
Murphy2000 Hα, [O iii] 22 3.5, 4.4 286 12 12 7.4 ± 2.6 7.3 ± 2.7
2dF SMC stellar classification 23 0.5f 2874 31 31 8.8 ± 3.4 8.7 ± 3.4
6dF GS galaxy redshifts 24 1.0f 16 6 6 0.04 ± 0.20 0.04 ± 0.20
Kozlowski2009 AGN candidates 25 1.0f 655 146 148 3.9 ± 2.2 3.8 ± 2.1
Bica2008 star cluster 26 26.6k 409 41 45 29.0 ± 6.1 32.1 ± 6.6
Bonatto2010 star cluster 27 33.7k 75 11 14 7.8 ± 2.9 9.4 ± 3.2

Notes.

(a)

Number of reference-catalogue sources in the XMM-Newton survey field.

(b)

Number of reference-catalogue sources matching at least one XMM-Newton source.

(c)

Number of XMM-Newton sources matching at least one reference-catalogue source.

(d)

Expected number of reference sources matched by chance.

(e)

Expected number of XMM-Newton sources matched by chance.

(f)

Value estimated.

(g)

Compared with a subset of XMM-Newton sources brighter than 5 × 10-14 erg cm-2 s-1.

(h)

Compared with a subset of XMM-Newton sources brighter than 10-14 erg cm-2 s-1.

(i)

Catalogue contains individual position uncertainties for each source, value gives the average of the used sample.

(j)

Uncertainty is 3′′ for sources detected at 24 μm or higher, 6′′ for sources detected at 70 μm only, 1′′ otherwise.

(k)

This is the average of the semi-mayor axis extent.

Reference. (1) Wang & Wu (1992); (2) Haberl et al. (2000); (3) Sasaki et al. (2000); (4) Yokogawa et al. (2003); (5) McGowan et al. (2008); (6) Laycock et al. (2010); (7) Nazé et al. (2003); (8) Evans et al. (2010); (9) Zaritsky et al. (2002); (10) Høg et al. (2000); (11) Lasker et al. (2008); (12) Skrutskie et al. (2006); (13) Cioni et al. (2000); (14) DENIS Consortium (2005); (15) Kato et al. (2007); (16) Bolatto et al. (2007); (17) Filipović et al. (2002); (18) Payne et al. (2004); (19) Bock et al. (1999); (20) Mauch et al. (2003); (21) Meyssonnier & Azzopardi (1993); (22) Murphy & Bessell (2000); (23) Evans et al. (2004); (24) Jones et al. (2009); (25) Kozłowski & Kochanek (2009); (26) Table 3 of Bica et al. (2008); (27) Bonatto & Bica (2010).

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