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Warped accretion discs and the long periods in X-ray binaries
Ralph A. M. J. Wijers, J. E. Pringle
Precessing accretion discs have long been suggested as explanations for the long periods observed in a variety of X-ray binaries, most notably Her X-1/HZ Her. We show that an insta…
SCUBA sub-millimeter observations of gamma-ray bursters. I. GRB 970508, 971214, 980326, 980329, 980519, 980703
I. A. Smith, R. P. J. Tilanus, J. van Paradijs +7
We discuss the first results of our ongoing program of Target of Opportunity observations of gamma-ray bursts (GRBs) using the SCUBA instrument on the James Clerk Maxwell Telescope…
Energetics and beaming of gamma-ray burst triggers
P. Meszaros, M. J. Rees, R. A. M. J. Wijers
A wide range of mechanisms have been proposed to supply the energy for gamma-ray bursts (GRB) at cosmological distances. It is a common misconception that some of these, notably NS…
The radio to X-ray spectrum of GRB 970508 on May 21.0 UT
T. J. Galama, R. A. M. J. Wijers, M. Bremer +4
We have reconstructed the spectrum of the afterglow of GRB 970508, on May 21.0 UT (12.1 days after the GRB), on the basis of observations spanning the X-ray to radio range. The low…
Warped Disks as a Possible Origin of Torque Reversals in Accretion-Powered Pulsars
M. H. van Kerkwijk, Deepto Chakrabarty, J. E. Pringle +1
Enigmatic transitions between spin-up and spin-down have been observed in several X-ray pulsars accreting matter via an accretion disk. In these transitions, the torque changes sig…