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A four-hours long burst from Serpens X-1
R. Cornelisse, E. Kuulkers, J. J. M. in 't Zand +2
During a serendipitous observation of the BeppoSAX Wide Field Cameras, a very long Type I X-ray burst was observed from the low mass X-ray binary Serpens X-1. The burst lasted for…
A half-a-day long thermonuclear X-ray burst from KS 1731-260
E. Kuulkers, J. J. M. in 't Zand, M. H. van Kerkwijk +7
We report on an approximately twelve hour long X-ray flare from the low-mass X-ray binary KS 1731-260. The flare has a rise time of less than 13 min and declines exponentially with…
X-ray flashes and X-ray rich Gamma Ray Bursts
John Heise, Jean in 't Zand, Marc Kippen +1
X-ray flashes are detected in the Wide Field Cameras on BeppoSAX in the energy range 2-25 keV as bright X-ray sources lasting of the order of minutes, but remaining undetected in t…
Identification of the optical and quiescent counterparts to the bright X-ray transient in NGC 6440
J. J. M. in 't Zand, M. H. van Kerkwijk, D. Pooley +3
After 3 years of quiescence, the globular cluster NGC 6440 exhibited a bright transient X-ray source turning on in August 2001, as noted with the RXTE All-Sky Monitor. We carried o…
Discovery of a 1247 s pulsar in the Be X-ray binary SAX J2239.3+6116
J. J. M. in 't Zand, J. Swank, R. H. D. Corbet +1
A search for pulsations from the Be X-ray binary SAX J2239.3+6116, through observations with the Narrow Field Instruments on BeppoSAX and the Proportional Counter Array on RXTE, yi…
Discovery of the X-ray burster SAX J1752.3-3138
M. Cocchi, A. Bazzano, L. Natalucci +5
During a 50 ks monitoring observation of the Galactic bulge performed in September 1999 by the Wide Field Cameras on board the BeppoSAX satellite, an X-ray burst was detected from…
BeppoSAX observation of the eclipsing dipping X-ray binary X1658-298
T. Oosterbroek, A. N. Parmar, L. Sidoli +2
Results of a 2000 August 12-13 BeppoSAX observation of the 7.1 hr eclipsing, dipping, bursting, transient, low-mass X-ray binary (LMXRB) X1658-298 are presented. The spectrum outsi…
Very low luminosities from the accretion-driven millisecond X-ray pulsar SAX J1808.4-3658 during quiescence
Rudy Wijnands, Lucien Kuiper, Jean in 't Zand +3
We have observed the millisecond X-ray pulsar SAX J1808.4-3658 on three occasions during its 2000 outburst with the BeppoSAX satellite. The source was highly variable and erratic d…
The first outburst of SAX J1808.4-3658 revisited
J. J. M. in 't Zand, R. Cornelisse, E. Kuulkers +8
Data of the 1996 outburst of the single-known accreting millisecond pulsar SAX J1808.4-3658, taken with the Wide Field Cameras (WFCs) on BeppoSAX, are revisited with more complete…
GRB000615 in X-rays
L. Nicastro, G. Cusumano, A. Antonelli +9
GRB000615 was detected simultaneously by the BeppoSAX GRBM and WFC 1 with a localization uncertainty of 2' (error circle radius). X-ray emission was detected only in the 0.1-4 keV…
BeppoSAX measurements of the bright gamma-ray burst 010222
J. J. M. in 't Zand, L. Kuiper, L. Amati +14
We analyze the BeppoSAX measurements of the prompt and afterglow emission of the gamma-ray burst GRB010222. Among 45 GRBs detected with the Wide Field Cameras on BeppoSAX, the 40-7…
The prompt emission of GRB990712 with BeppoSAX: evidence of a transient X-ray emission feature
F. Frontera, L. Amati, M. Vietri +11
We report on the prompt X- and gamma-ray observations of GRB990712 with the BeppoSAX Gamma-Ray Burst Monitor and Wide Field Camera No. 2. Due to Sun constraints, we could not perfo…
BATSE Observations of Fast X-ray Transients Detected by BeppoSAX-WFC
R. Marc Kippen, Peter M. Woods, John Heise +3
The BeppoSAX Wide Field Cameras have been successful in detecting gamma-ray bursts in the 2--26 keV energy range. While most detected bursts are also strong emitters at higher ener…