Minchin et al. (2004, Cat. ) have recently placed limits on the cosmological significance of gas-rich low surface brightness (LSB) galaxies as a proportion of the total population of gas-rich galaxies by carrying out a very deep survey (HIDEEP) for neutral hydrogen (HI) with the Parkes multibeam system. Such a survey avoids the surface brightness selection effects that limit the usefulness of optical surveys for finding LSB galaxies. To complement the HIDEEP survey, we have digitally stacked eight 1-h R-band Tech Pan films from the UK Schmidt Telescope covering 36{deg}^2^ of the survey area to reach a very deep isophotal limit of 26.5Rmag/arcsec^2^. At this level, we find that all of the 129 HI sources within this area have optical counterparts and that 107 of them can be identified with individual galaxies.

Cone search capability for table J/MNRAS/355/1303/table1 (Optical properties of HIDEEP galaxies)

Cone search capability for table J/MNRAS/355/1303/table2 (Positions of newly discovered galaxies in the HIDEEP optical area)