SIMBAD references

Photoelectric measurements of more than 13 500 stars have been made with a four-channel photometer attached to the 48 cm reflector of the Tien Shan High Altitude Station of the Sternberg Astronomical Institute during 1985-1988. The program, observational details, photometric equipment and reduction procedures used are described. Particular attention is paid to definition of the photometric WBVR system of the catalogue. The stability of the photometric system has been assured by taking into account temporal and temperature shifts of the photometric passbands. These shifts were obtained from the analysis of observational data. Estimates of the accuracy of the photometry are presented. A study of completeness of the catalogue shows that it contains more than 95 % of stars with V ≤ 7 mag. The transformation to the photometric system UBV is discussed.