3 papers
astro-ph2006
INTEGRAL/RossiXTE high-energy observation of a state transition of GX 339-4
T. Belloni, I. Parolin, M. Del Santo +7
On 2004 August 15, we observed a fast (shorter than 10 hours) state transition in the bright black-hole transient GX 339-4 simultaneously with RossiXTE and INTEGRAL. This transitio…
astro-ph2004
A transient high-coherence oscillation in 4U 1820-30
T. Belloni, I. Parolin, P. Casella
We re-analyzed two Rossi X-Ray Timing Explorer archival observations of the atoll source 4U 1820-30 in order to investigate the detailed time-frequency properties of the source dur…
astro-ph2003
The Luminosity Function of Cluster Galaxies. III
I. Parolin, E. Molinari, G. Chincarini
We investigated the optical properties of 7 clusters of galaxies observed in three colors over the range of absolute magnitudes -24 < M < -12. Our aim is to estimate the Luminosity…