5 papers · 1 filter
Rapid variability of the kHz-QPO frequency in 4U1608-52
S. Paltani, D. Barret, J. F. Olive +1
We investigate the variability of the QPO frequency in 4U1608-52 on very short time scales of a few seconds. We detect changes in frequency as fast as 0.5 Hz/s, which is more than…
Low and High Frequency Quasi-Periodic Oscillations in 4U1915-05
L. Boirin, D. Barret, J. F. Olive +2
The X-ray burster and dipper 4U1915-05 (also known as XB1916-053) was observed 19 times for a total exposure of roughly 140 ks between 1996 February and October with the proportion…
RXTE Broad Band X-ray Spectrum of the Burster 1E1724-3045
J. F. Olive, D. Barret, L. Boirin +1
The X-ray burster 1E1724-3045 located in the globular cluster Terzan 2 is known as one of the persistent (though variable) hard X-ray sources as shown by the SIGMA observations of…
Discovery of High Frequency Quasi-Periodic Oscillations in 4u1915-05
D. Barret, L. Boirin, J. F. Olive +4
The type I X-ray burster and dipper 4U1915-05 (also known as XB1916-053) was monitored by the Rossi X-ray Timing Explorer between February and October, 1996. The source was observe…
An ASCA X-ray Observation of 1E1724-3045 in the globular cluster Terzan 2
D. Barret, J. E. Grindlay, I. M. Harrus +1
The bright persistent X-ray source and type I X-ray burster 1E1724-3045 located in the globular cluster Terzan 2 was observed by ASCA for about 10 ksec on September 24-25th, 1995 w…