Dwarf galaxies in the Virgo cluster. II. Photometric techniques and basic data.

Photographic surface photometry has been carried out for 305 (mostly dwarf) galaxies in the Virgo cluster, digitizing the galaxy images on 14 of the 67 du Pont plates used for the Virgo cluster survey (Binggeli et al. 1985). We report the procedures and basic data of the photometry. Azimuthally averaged surface brightness profiles are shown for all galaxies. The following model-free photometric parameters have been derived and are listed for each galaxy: total apparent blue magnitude, mean effective radius and surface brightness, various isophotal radii, ellipticity, and position angle. Most galaxies could be fitted by an exponential form and/or a King model profile. We list the best-fitting parameters, including the «nuclear» (central residual) magnitudes for dE+dSO galaxies