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X-ray bursts from 1RXS J170930.2-263927 = XTE J1709-267
M. Cocchi, A. Bazzano, L. Natalucci +5
We report evidence of type-I X-ray bursting activity from the transient 1RXS J170930.2-263927 when it was in outburst early 1997. This identifies the source as a probable low-mass…
Gamma-Ray Burst 980329 and its X-Ray Afterglow
J. J. M. in 't Zand, L. Amati, L. A. Antonelli +16
GRB 980329 is the brightest gamma-ray burst detected so far with the Wide Field Cameras aboard BeppoSAX, both in gamma-rays and X-rays. With respect to its fluence (2.6 X 10**-5 er…
The Rapid Decay of the Optical Emission from GRB 980326 and its Possible Implications
Paul J. Groot, Titus J. Galama, Paul M. Vreeswijk
We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 +/- 0.13 and a constant underlying…
XTE J1739-302: An Unusual New X-ray Transient
D. M. Smith, D. Main, F. Marshall +5
A new x-ray transient, designated XTE J1739-302, was discovered with the Proportional Counter Array (PCA) on the Rossi X-ray Timing Explorer (RXTE) in data from 12 August 1997. Alt…
Discovery of SAX J1753.5-2349 and SAX J1806.5-2215: two X-ray bursters without detectable steady emission
J. J. M. in 't Zand, J. Heise, J. M. Muller +4
We report the discovery with BeppoSAX-WFC of two new X-ray sources that were only seen during bursts: SAX J1753.5-2349 and SAX J1806.5-2215. For both sources, no steady emission wa…
Discovery of the X-ray transient SAX J1808.4-3658, a likely low mass X-ray binary
J. J. M. in 't Zand, J. Heise, J. M. Muller +4
We report the discovery of a fairly bright transient during observations with the Wide Field Cameras on board the BeppoSAX satellite in September 1996. It was detected at a peak in…