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In this paper we present a deep and homogeneous  i ‐band‐selected multiwaveband catalogue in the COSMOS field covering an area of about 0.7 deg 2 . Our catalogue with a formal 50 per cent completeness limit for point sources of   i ∼ 26.7  comprises about 290 000 galaxies with information in 8 passbands. We combine publicly available  u, B, V, r, i, z  and  K  data with proprietary imaging in  H  band. We discuss in detail the observations, the data reduction, and the photometric properties of the  H ‐band data. We estimate photometric redshifts for all the galaxies in the catalogue. A comparison with 162 spectroscopic redshifts in the redshift range  0 ≲ z ≲ 3  shows that the achieved accuracy of the photometric redshifts is  Δ z /( z  spec + 1) ≲ 0.035  with only ∼2 per cent outliers. We derive absolute UV magnitudes and investigate the evolution of the luminosity function evaluated in the rest‐frame UV (1500 Å). There is a good agreement between the luminosity functions derived here and the luminosity functions derived in the FORS Deep Field. We see a similar brightening of M* and a decrease of  φ*  with redshift. The catalogue including the photometric redshift information is made publicly available.

A deep i ‐selected multiwaveband galaxy catalogue in the COSMOS field ★