ar X iv : a st ro - p h / 06 11 03 3 v 1 1 N ov 2 00 6 On the Progenitor of Supernova 1987 A

ar X iv : a st ro - p h / 06 11 54 4 v 1 1 6 N ov 2 00 6 Discovery of a nearby twin of SN 1987 A ’ s nebula around the

ar X iv : a st ro - p h / 06 11 09 9 v 1 2 N ov 2 00 6 Nuclear Activity in UZC Compact Groups of Galaxies

ar X iv : a st ro - p h / 03 11 44 5 v 1 1 9 N ov 2 00 3 Multiscale self - organized criticality and powerful X - ray flares

A combination of spectral and moments analysis of the continuous X-ray flux data is used to show consistency of statistical properties of the powerful solar flares with 2D BTW prototype model of self-organized criticality.

ar X iv : a st ro - p h / 01 11 13 6 v 1 7 N ov 2 00 1 1 Active Optics in Modern , Large Optical Telescopes

ar X iv : a st ro - p h / 06 11 30 3 v 1 9 N ov 2 00 6 Flat rotational curves without dark matter

We consider the singular configurations of gravitating gas [1] which could be used as a model for disk galaxies. The simplest steady configuration , which corresponds to rotation of stars around center gives flat rotational curve, provided the density distrubution has a tail, decaying as 1/r. This result based exclusively on Newtonian gravity and does not involve dark matter.