Photometric results for the galaxy NGC 4736 are presented, including IR and visible profiles. After correction for the extinction within the galaxy based on measured neutral gas surface densities, the profiles in the individual bands and in color indices are interpreted in terms of the radial distribution of stellar populations. The behavior of the

IAUC 4798 available at Central Bureau for Astronomical Telegrams. IAUC 4798 available at Central Bureau for Astronomical Telegrams. IAUC 4798 available at Central Bureau for Astronomical Telegrams.

IAUC 4782 available at Central Bureau for Astronomical Telegrams. IAUC 4782 available at Central Bureau for Astronomical Telegrams. IAUC 4782 available at Central Bureau for Astronomical Telegrams.

The serendipitous discovery of a new type I Seyfert galaxy, IRAS 09149-6206, found during a search for planetary nebulae using the IRAS Point Source Catalog is reported. The optical spectrum of this galaxy shows very strong broad Balmer and Fe II emission, indicating the existence of large optical depths, while the emission spectrum from the narrow

A method for applying a modified Wiener filter to time-tagged single photon data is proposed which can preprocess the data for use by a wide range of image sharpening algorithms. The method is applied to data from the 50-cm Roque de los Muchachos Observatory telescope, resulting in near diffraction limited images of the bright triple-star system

The effect produced by a sharp discontinuity in the upper boundary of the conductosphere is analysed in order to evaluate the distortions introduced in geomagnetic variation profiles in the long-period range of the spectra. To do so, a conformal mapping method is applied and the results are compared with the ones obtained in the case of lateral