ar X iv : a st ro - p h / 01 07 09 2 v 1 5 J ul 2 00 1 Infrared Observation of Hot Cores ⋆

ar X iv : a st ro - p h / 05 07 06 6 v 1 4 J ul 2 00 5 Multiband Echo Tomography of Sco X - 1

ar X iv : a st ro - p h / 00 07 10 5 v 1 8 J ul 2 00 0 THE BROAD BAND SPECTRUM AND VARIABILITY OF SEYFERT 1

Recent results on the X–ray spectrum and variability of Seyfert 1 galaxies are reviewed. New spectral results from BeppoSAX observations are also presented and briefly discussed.

ar X iv : a st ro - p h / 02 01 09 3 v 1 7 J an 2 00 2 Mid - infrared observations of the SGR 1900 + 14 error box

We report on mid-infrared observations of the compact stellar cluster located in the proximity of SGR 1900+14, and the radio/X-ray position of this soft-gamma repeater. Observations were performed in May and June of 2001 when the bursting source was in an active state. At the known radio and X-ray position of the SGR we did not detect transient mid-IR activity, although the observations were pe...

ar X iv : a st ro - p h / 01 07 00 9 v 1 1 J ul 2 00 1 Theory of GRB Afterglow

The most interesting current open question in the theory of GRB afterglow is the propagation of jetted afterglows during the sideway expansion phase. Recent numerical simulations show hydrodynamic behavior that differs from the one suggested by simple analytic models. Still, somewhat surprisingly, the calculated light curves show a ‘jet break’ at about the expected time. These results suggest t...

ar X iv : a st ro - p h / 98 07 09 0 v 1 9 J ul 1 99 8 1 MACROSCOPIC PROCESSES IN THE SOLAR INTERIOR

With the