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95 papers
Extended Power-Law Decays in BATSE Gamma-Ray Bursts: Signatures of External Shocks?
T. W. Giblin, V. Connaughton, J. van Paradijs +5
The connection between Gamma-Ray Bursts (GRBs) and their afterglows is currently not well understood. Afterglow models of synchrotron emission generated by external shocks in the G…
The mass of the neutron star in Vela X-1
O. Barziv, L. Kaper, M. H. van Kerkwijk +2
We measured the radial-velocity curve of HD77581, the B-supergiant companion of the X-ray pulsar Vela X-1, using 183 high-resolution optical spectra obtained in a nine-month campai…
The second ROSAT PSPC survey of M31 and the complete ROSAT PSPC source list
R. Supper, G. Hasinger, W. H. G. Lewin +5
This paper reports the results of the analysis of the second ROSAT PSPC survey of M31 performed in summer 1992. We compare our results with those of the first survey. Within the ~1…
A Non-Triggered Burst Supplement to the BATSE Gamma-Ray Burst Catalogs
J. M. Kommers, W. H. G. Lewin, C. Kouveliotou +4
The Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory detected gamma-ray bursts (GRBs) with a real-time burst detection (or "trigger") system runni…
SW Sextantis in an excited, low state
Paul J Groot, Rene' G. M. Rutten, Jan van Paradijs
We present low-resolution spectrophotometric optical observations of the eclipsing nova-like cataclysmic variable SW Sex, the prototype of the SW Sex stars. We observed the system…
Search for Millisecond Periodicities in Type I X-ray Bursts of the Rapid Burster
D. W. Fox, W. H. G. Lewin, R. E. Rutledge +8
We have searched the rising portion of type I X-ray bursts observed from the Rapid Burster with the Rossi X-ray Timing Explorer for the presence of periodicities. The 95 per cent c…