Barred galaxies frequently exhibit central starburst activity, typically concentrated in circumnuclear rings. Much of direct and circumstantial evidence speaks in favor of bar-induced fueling of star-forming activity in these galaxies. We present results, partly preliminary, for three galaxies which were studied through high-resolution imaging in

The polarization spectrum of OJ287 was obtained during the 1993/94 observing campaign within the OJ-94 International Collaboration. Data were taken on December 17-18-19/1993, an on Januarty 11-12/1994. Between both periods of observations, OJ287 showed minor flare activity, where brightness raised from V=15.75 to V=15.25, and the polarization

Black hole candidates (BHCs) are increasingly found as luminous hard x-ray sources, with spectra exending up to 100-200 keV, which undergo transient outbursts and appear as "X-ray novae" for durations of typically 10-100 days. The BATSE detectors on CGRO constitute a powerful all-sky monitor and have detected the brightest of these, with peak

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We present two geometrical methods to analyse the cosmic microwave background data along a strip in the sky. These methods are motivated by the fact that the temperature fluctuation field, on large angular scales, is not ergodic on the cosmic photosphere. This property is examined in the context of different experimental configurations. The methods

The results of a UBVR photometric study in the field of the open cluster IC 1311 are presented. A comparison with previously published results on NGC 7044, based on measurements secured during the same observing run, leads to a self-consistent constraints to the parameters of the cluster. The location of selected samples of giant and unevolved