Published photometry used to calibrate many of the images in
The de Vaucouleurs Atlas of Galaxies
Revised UBV Photometry Catalogue
G. Longo and A. de Vaucouleurs, University of Texas at Austin Monographs 3 and 3A, 1983, 1985, and updated by R. Buta
to 1987
VRI Photometry Catalogue A. de Vaucouleurs and G. Longo, University
of Texas at Austin Monograph, 1988
New! Complete Corrected Revised UBV
Photometry Catalogue including photometric uncertainties
New! Complete Corrected Revised UBV
Photometry Catalogue including photometric weights