Near infrared monitoring taken with the 1.5 m Carlos Sanchez Telescope in Tenerife of the decline of 3C279 during its 1988 outburst is presented. These data are combined with visible monitoring and data from the literature to examine the behavior of the light curve from B to K. A maximum in the infrared light curve was observed in June 1989 which

IAUC 5543 available at Central Bureau for Astronomical Telegrams.

The paper presents detailed high-spatial-resolution spectroscopy of seven WR ring nebulae, observed at several telescopes in both hemispheres. These are Anon (MR 26), Anon (MR 100), G 2.4 + 1.4, L 69.8 + 1.74, NGC 3199, RCW 104, and S 308. Using line diagnostic diagrams, it is found that photoionization is the main excitation source in the sample

Results are presented of an imaging study of eight Sb-Sc spirals, based on CCD observations in the B, V, R, I, and Z photometric filters. Presented are grey scale images, both in individual bands and in color indices, isophote maps, the parameters of the best fits to the isophotes (ellipticity and position angle as functions of deprojected radius)

A study on the lithium abundance in 36 T Tauri stars (mass range 0.4-2.25 solar masses), partly based on high-dispersion spectra taken with the Isaac Newton Telescope, is presented. A study of non-LTE effects in the formation of the lithium double in T Tauri stars and derived corrections to the abundances in the LTE in the range 1.0-4.0 log N(Li)

Not Available