1,416 research outputs found
Science case for the Einstein telescope
No full textThe Einstein Telescope (ET), a proposed European ground-based gravitational-wave detector of third-generation, is an evolution of second-generation detectors such as Advanced LIGO, Advanced Virgo, and KAGRA which could be operating in the mid 2030s. ET will explore the universe with gravitational waves up to cosmological distances. We discuss its main scientific objectives and its potential for discoveries in astrophysics, cosmology and fundamental physics
A powerful veto for gravitational wave searches using data from Virgo's first scientific run
No full textInternational audienc
Prediction of Recurrence after Liver Transplantation for HCC: Validation of the AFP Model in an Italian Cohort
No full text
Extreme Variability in a Long-duration Gamma-Ray Burst Associated with a Kilonova
No full textThe recent discovery of a kilonova from the long-duration gamma-ray burst (GRB) GRB 211211A challenges classification schemes based on temporal information alone. Gamma-ray properties of GRB 211211A reveal an extreme event, which stands out among both short and long GRBs. We find very short variations (few milliseconds) in the lightcurve of GRB 211211A and estimate ∼1000 for the Lorentz factor of the outflow. We discuss the relevance of the short variations in identifying similar long GRBs resulting from compact mergers. Our findings indicate that in future gravitational-wave follow-up campaigns, some long-duration GRBs should be treated as possible strong gravitational-wave counterparts
4-jet events at LEP
No full textResults of a special study made by the four LEP experiments on 4-jet events recorded at Vs = 130 - 136 , 161 and 172 GeV are related. This study concerns the ALEPH analysis which has shown an excess of 4-jet events in data recorded at Vs = 130 - 136 GeV. No significant evidence has been found by the 3 other experiments. Results have been combined after several checks which did not show differences of performance between the four LEP experiments
The Virgo status
No full textto appear in the Proceedings 2007The Virgo detector now running with its full laser power is going through its final step of commissioning. We report on the last year activities: this includes the commissioning work done to bring the instrument to the target sensitivity after a shutdown period and the data analysis effort to search for the most promising sources of gravitational waves. The data analysis teams are now mainly focusing their effort on real data and have improved their understanding of the interferometer's sources of noise. Finally, we will describe the near-term plans for Virgo upgrades
Observational results from the LIGO and Virgo detectors
No full textOn behalf of the LIGO Scientific Collaboration and the Virgo Collaboration.International audienceThe first generation of ground-based interferometric gravitational wave detectors, LIGO, GEO and Virgo, have operated and taken data at their design sensitivities over the last few years. The data have been examined for the presence of gravitational wave signals. While no gravitational wave events have been found important astrophysical statements can be made. The most significant results are presented in this article. The network of detectors is currently being upgraded and extended. This upgrade will provide the sensitivity needed for the direct detection of an astrophysical source emitting gravitational waves. For instance, the binary neutron stars inspiral distance range will reach 200 Mpc when upgraded detectors reach their design sensitivities circa 2020. The capability of the global network to determine accurately the sky location of the source is opening a new window on the Universe, where gravitational alerts will be used for quick electro-magnetic follow-ups of the sources
The Virgo status
No full textto appear in the Proceedings 2007The Virgo detector now running with its full laser power is going through its final step of commissioning. We report on the last year activities: this includes the commissioning work done to bring the instrument to the target sensitivity after a shutdown period and the data analysis effort to search for the most promising sources of gravitational waves. The data analysis teams are now mainly focusing their effort on real data and have improved their understanding of the interferometer's sources of noise. Finally, we will describe the near-term plans for Virgo upgrades
- …
