Magnitudes and color indices in the Vilnius seven-color system were determined for 1752 stars down to V = 19.5 mag in the direction of the open cluster M29 (NGC 6913). The region is centered at RA=20:24, DEC=+38:30 (J2000) and covers an area of 1.5 sq. deg. The photometric data are used to classify about 70% of stars in spectral and luminosity classes and peculiarity types.
The area of the open cluster NGC 1647 in Taurus is investigated by CCD photometry in the Vilnius seven-color system. Magnitudes and color indices are determined for 433 stars down to V=15.0mag in the 45arcmin diameter area. For 252 of them photometric spectral and luminosity classes, interstellar reddenings, extinctions and distances are obtained. According to the CDS WEBDA database, 89 of them have a high cluster membership probability. Their mean distance from the Sun is 555+/-74pc, excluding four stars which seem to be field stars. The main sequence starts at spectral class B7 V which corresponds to a cluster age of about 150 million years. Cluster members show a differential interstellar extinction ranging from 0.8 to 1.8mag. The mean extinction of the cluster stars is 1.12+/-0.25mag. Interstellar extinction in the area is dominated by the Taurus dark cloud complex at 160pc. Color excesses of individual stars correlate well with the 100um dust thermal emission intensity. The cluster shape is investigated by counting stars down to K=15.6mag and is found to be elongated in the direction roughly perpendicular to the Milky Way, with the flattening 0.4.
Photoelectric seven-color photometry in the Vilnius medium-band system has been obtained for 374 stars in four MEGA proper-motion fields, KA 112, KA 113, KA 118 and KA 119, each of about 1.4 square degree size, near the North Galactic Pole. The catalog of observations is complete down to nearly V=13.0mag, except for the one field, KA 118, for which the completeness is achieved down to only V=12.5mag. For a description of the Vilnius photometric system, see e.g. <GCPD/21>
The results of CCD photometry in the seven-color Vilnius system are given for 727 stars down to V~17 mag in a 1.5 square degree field in the region of dark cloud TGU H994 P1 (or LDN 1399, LDN 1400 and LDN 1402) in Camelopardalis. Using the intrinsic color indices and photometric reddening-free Q-parameters, two-dimensional spectral types for 73% of stars are determined.
The results of CCD photometry in the seven-color Vilnius system are given for 855 stars down to V~20mag in three 12x12 arcmin areas of the dark cloud TGU H994P1. Observational data were obtained in 2014-2015 with the 1.8m VATT telescope of the Vatican Observatory on Mt Graham, Arizona. Two-dimensional classification in the MK system is given for about 65% of stars.
CCD observations of the northern globular cluster M 92 were obtained in the PXYVS colors of the Vilnius photometric system. The results for 230 stars in an area centered on the cluster and for 178 stars in an area west of the cluster down to V=17.0mag are presented. After a brief outline of the data pathway from observations to reduction via IRAF and a discussion of the photometric errors, the [Fe/H] ratio of the globular cluster M 92 is determined by multicolor PXYVS Vilnius photometry.
