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AGNs with composite spectra. II. Additional data

Véron-Cetty, M. -P.; Véron, P.; Gonçalves, A. C.

In a previous paper \cite[(Véron et al. 1997)]{ver97} we presented medium resolution (3.4 Angstroms FWHM) spectroscopic observations of 15 ``transition objects'', selected for having an ambiguous location in the \cite[Veilleux & Osterbrock (1987)]{vei87} diagnostic diagrams, and showed that most of them were in fact ``composite'', this being d…

Near-infrared photometry of isolated spirals with and without an AGN. I. The data

Roth, M.; Durret, F.; González Delgado, R. M. +6 more

We present infrared imaging data in the J and K' bands obtained for 18 active spiral galaxies, together with 11 non active galaxies taken as a control sample. All of them were chosen to satisfy well defined isolation criteria so that the observed properties are not related to gravitational interaction. For each object we give: the image in the K' …

Predicted HST FOC and broad band colours for young and intermediate simple stellar populations.

Romaniello, M.; Castellani, V.; Brocato, E. +1 more

This paper presents theoretical HST and broad band colours from population synthesis models based on an homogeneous set of stellar evolutionary tracks as computed under canonical (no overshooting) assumptions, covering the range of cluster ages from t = 8 Myr to t = 5 Gyr for three different metallicities (Z=0.02, 0.006, and 0.001). Statistical fl…

Near infrared observations of quasars with extended ionized envelopes

Durret, F.; Petitjean, P.; Márquez, I.

We have observed a sample of 15 and 8 quasars with redshifts between 0.11 and 0.87 (mean value 0.38) in the J and K' bands respectively. Eleven of the quasars were previously known to be associated with extended emission line regions. After deconvolution of the image, substraction of the PSF when possible, and identification of companions with the…