... survey

Our matched catalogues are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/476/59

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... 2MASS

2MASS is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/ California Institute of Technology. Funding for the survey has been provided by NASA and the NSF.

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... limit

Strictly speaking, 6 objects were reclassified out of the XSC in the all sky 2MASS catalogue, but as we confirm that they really are galaxies, we have retained them in the "extended' sample. They make no significant difference to any of the statistics presented later.

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...##)

The outlier with the very blue $b_j-K_{\rm s}$, FCC222, is in the Arp & Madore (1987) catalogue with several classifications in different sources and strange spectral characteristics (Mieske et al. 2002). Its colour may also be rather uncertain, its b_j magnitude in the SuperCOSMOS sky survey (Hambly et al. 2001) is 16.2 compared to our 15.1. Mieske et al. (2002) give V=14.9 and the eye estimate in the FCC is B=15.6. SuperCOSMOS gives a more reasonable $b_j-K_{\rm s} = 2.8$.

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... still

60% of missed FCSS galaxies have emission line spectra, 29% match G, F or A star spectra and only 11% K or M type spectra.

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