Colour distributions in E-S0 galaxies. V. Colour data for strongly inclined lenticulars

Colours distributions have been studied in 12 S0 galaxies, most of these ne arly edge-on, from high resolution frames obtained at the CFHT and the Pic du Midi 2 m telescope, supplemented for some purposes by low resolution fra mes from the Observatoire de Haute Provence 120 cm telescope. Great attention has been given to reduce the effects of "differential seein g", resulting from different PSF's in the two frames needed for a colour me asurement. Errors from various sources; and their effect upon measured quan tities, have been evaluated from the study of pseudo-colours (obtained by a pplying our measuring techniques to pair of frames taken in the same passba nd), and from the comparison of colours data from our various series. Data are given about the following topics: Radial isophotal colour profiles, leading to reference colours at r(c) and gradients in 4 colour indices (except for missing data); Reference colours and gradients in possibly dustless regions of nearly pure bulge or disk, allowing a comparison between the two components; Dust patterns, seen in 7 objects; Systematic differences between major and minor axis colours upon isophotal contours (outside dust patterns). Both a redder or bluer major axis are enc ountered depending upon the object; or the central distance in a given obje ct. The observations may sometimes be explained by local dust concentration in disks. In other cases population differences between spheroidal and dis k components should be invoked; Asymmetries in light and colour distributions along the minor axis in 3 obj ects, due to dust concentrated in the disk; Correlations between ring structure and major axis colour profiles.