Sixty-one bidimensionally distributed spectra covering the circumnuclear region of NGC 4161 within a radius of about 6.5 arcsec are presented. The local conditions and the mean velocity field are studied from an analysis of the H-alpha, forbidden N II 6548, 6584, and forbidden S II 6716, 6731 lines. The alignment of the line intensity maps in the

Not Available

IAUC 5578 available at Central Bureau for Astronomical Telegrams. IAUC 5578 available at Central Bureau for Astronomical Telegrams.

A description of the stray-light problem based on a radiative transfer approach is presented. The 2D convolution that describes the effect of the stray-light is recovered in this formalism. The controversy raised by the old normalization condition is satisfactorily eliminated within the present description. The present formalism is applied to

The K I 7699-A resonance absorption line was used to observe a group of 18 early-type stars within a 200-pc radius of the sun with a signal-to-noise ratio of 50-250. The interstellar absorptions provide a way to 'tag' a cloud via its radial velocity to within +/-1.5 km/s. Based on the hypothesis of pressure confinement, the temperatures of the

We present the results of a five-month spectroscopic monitoring campaign of two radio loud quasars, PKS 1217 + 023 and PKS 1302 - 102. There is a pronounced lack of variability in 1302 - 102 apart from a possible small change in the continuum level near the end of the monitoring period, but 1217 + 023 underwent a 20 percent continuum decrease in