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Abstract: Earth is hit daily by some 4 gamma-ray bursts, almost isotropically from all directions, of durations between msec and hour but centered on 1 sec. Temporal fine structure reaches down below ms, reminiscent of neutron-star sources. Each two bursts have different, mostly composite light curves, with subbursts of exponentially decaying hardness. Afterglows have broadband, white spectra, reminiscent of reflection nebulae, and fade as broken power laws during many months,with redshifted emission and absorption lines, predominantly from iron. For distances of a few 100 pc, their energetics conform with neutron-star sources during spasmodic accretion. Their relativistic redshifts are reminiscent of SS 433, and the 5 or more repeaters among them look like the nearest of them. None of the tentative `identifications? with faint `host galaxies? at cosmic distances is without serious problems.
Seminarsko predavanje bo v petek 2. aprila 2004 ob 15:15 uri v seminarski sobi CAMTP, Krekova 2, pritlicje desno. Vljudno vabljeni vsi zainteresirani, tudi študentje.