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105 papers · 1 filter
The decay of optical emission from the Gamma-Ray Burst GRB 970228
Titus J. Galama, Paul J. Groot, Jan van Paradijs +6
We present the R_c band light curve of the optical transient (OT) associated with GRB970228, based on re-evaluation of existing photometry. Data obtained until April 1997 suggested…
GX 349+2 (Sco X-2): An odd-ball among the Z sources
Erik Kuulkers, Michiel van der Klis
We report on about 4 hrs of observations made with the Rossi X-ray Timing Explorer on 1997 May 2 of the low-mass X-ray binary and Z source GX 349+2 (Sco X-2). Initially the source…
The Quantum Inverse Scattering Method for Hubbard-like Models
M. J. Martins, P. B. Ramos
This work is concerned with various aspects of the formulation of the quantum inverse scattering method for the one-dimensional Hubbard model. We first establish the essential tool…
The viscous disk of GRS 1915+105
T. Belloni, M. Mendez, A. R. King +2
GRS 1915+105, one of the two known galactic microquasars, shows an extremely complex variability in the X-ray band, comparable to no other X-ray source in the sky. Making use of RX…
The broad-band X-ray spectrum of RE 0751+14 (PQ Gem)
T. Belloni, G. Matt, D. De Martino +7
RE 0751+14 is a member of the class of Soft Intermediate Polars. Unlike classical Intermediate Polars, they are characterized by the presence of a soft component in their X-ray spe…
A comment on the -coupling in (M)atrix Theory
Marco Serone
By scaling arguments we show that the presence of a -term in the eleven dimensional supergravity effective lagrangian, if it is visible in (M)atrix theory, should produce a co…