ar X iv : a st ro - p h / 99 06 14 4 v 1 8 J un 1 99 9 Bursts from internal shocks : is it really synchrotron emission ?

ar X iv : a st ro - p h / 97 06 07 4 v 1 8 J un 1 99 7 The radioastronomical ” Time Machine ” effect and the solution of gamma ray bursts mystery

The possible low-frequency radio emission from the progenitors of gamma ray bursts can experience a delay from tens of seconds to hours on the way to the observer due to the dispersion in galactic and extragalactic plasma, and thus reach the observer as a radio afterglow of the burst. This opens a unique possibility (peculiar ”Time Machine”) of seeing what happened in that place before the cata...

ar X iv : a st ro - p h / 99 04 24 4 v 2 3 J un 1 99 9 Is SGR 1900 + 14 a Magnetar ?

We present RXTE observations of the soft gamma–ray repeater SGR

ar X iv : a st ro - p h / 95 06 06 0 v 1 8 J un 1 99 5 The Physics of Core - Collapse Supernova Explosions a

ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY

ar X iv : a st ro - p h / 99 06 08 9 v 1 4 J un 1 99 9 The SW Sextantis stars

I review the observational properties of SW Sex stars. I show that they can be explained by an accretion stream overflowing the disc, combined with an accretion disc wind. I suggest that SW Sex behaviour is caused by episodes of very high mass transfer, which are balanced by VY Scl low states.