An Optical-UV-IR Survey of the North Celestial Cap: I. The Catalogue
  We describe the final product of the North Celestial Cap Survey (NCC Survey,
NCCS) - the optical-UV-IR merged catalogue for the region within 10 deg of the
North Celestial Pole. The NCC region at DEC > 80 deg is poorly covered by
modern CCD-based surveys. The optical part of the survey was observed in V, R
and I with the Wise Observatory telescopes and was merged with GALEX UV and
WISE IR data, producing the catalogue. More than four million objects were
observed in at least one optical band. The final catalogue contains ~1.6
million sources observed in all three optical bands, of which some 1.4 million
have WISE counterparts and ~300,000 have GALEX counterparts. The astrometric
accuracy of the optical NCCS data, derived from a comparison with the UCAC3
catalogue, is better than 0.2 arcsec and the photometry, when compared with
SDSS, is good to ~0.15 mag for sources brighter than V = 20.3, R = 21.0 and I =
19.2 mag. The SDSS point-extended source separation is reproduced with >92%
efficiency.
