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Evidence of Shock-Driven Turbulence in the Solar Chromosphere
K. P. Reardon, F. Lepreti, V. Carbone +1
We study the acoustic properties of the solar chromosphere in the high-frequency regime using a time sequence of velocity measurements in the chromospheric Ca II 854.2 nm line take…
Gravitational waves from resolvable massive black hole binary systems and observations with Pulsar Timing Arrays
A. Sesana, A. Vecchio, M. Volonteri
Massive black holes are key components of the assembly and evolution of cosmic structures and a number of surveys are currently on-going or planned to probe the demographics of the…
Search for Gravitational Wave Bursts from Soft Gamma Repeaters
LIGO Scientific Collaboration, S. Barthelmy, N. Gehrels +2
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with Soft Gamma Repeater (SGR) bursts. This is the first search sensitive to neutron…
Assigning confidence to inspiral gravitational wave candidates with Bayesian model selection
John Veitch, Alberto Vecchio
Bayesian model selection provides a powerful and mathematically transparent framework to tackle hypothesis testing, such as detection tests of gravitational waves emitted during th…
The solar chromosphere at high resolution with IBIS. II. Acoustic shocks in the quiet internetwork and the role of magnetic fields
A. Vecchio, G. Cauzzi, K. P. Reardon
(Abridged) Aims: We characterize the dynamics of the quiet inter-network chromosphere by studying the occurrence of acoustic shocks and their relation with the concomitant photosph…
First joint search for gravitational-wave bursts in LIGO and GEO600 data
LIGO Scientific Collaboration, B. Abbott
We present the results of the first joint search for gravitational-wave bursts by the LIGO and GEO600 detectors. We search for bursts with characteristic central frequencies in the…
The Mock LISA Data Challenges: from Challenge 1B to Challenge 3
Stanislav Babak, John G. Baker, Matthew J. Benacquista +27
The Mock LISA Data Challenges are a programme to demonstrate and encourage the development of LISA data-analysis capabilities, tools and techniques. At the time of this workshop, t…
Parameter estimation of spinning binary inspirals using Markov-chain Monte Carlo
Marc van der Sluys, Vivien Raymond, Ilya Mandel +5
We present a Markov-chain Monte-Carlo (MCMC) technique to study the source parameters of gravitational-wave signals from the inspirals of stellar-mass compact binaries detected wit…
Beating the spin-down limit on gravitational wave emission from the Crab pulsar
The LIGO Scientific Collaboration, B. Abbott, R. Abbott +440
We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravit…
Search for a stochastic gravitational-wave signal in the second round of the Mock LISA Data Challenges
E. L. Robinson, J. D. Romano, A. Vecchio
The analysis method currently proposed to search for isotropic stochastic radiation of primordial or astrophysical origin with the Laser Interferometer Space Antenna (LISA) relies…
The stochastic gravitational-wave background from massive black hole binary systems: implications for observations with Pulsar Timing Arrays
Alberto Sesana, Alberto Vecchio, Carlo Nicola Colacino
Massive black hole binary systems, with masses in the range ~10^4-10^10 \msun, are among the primary sources of gravitational waves in the frequency window ~10^-9 Hz - 0.1 Hz. Puls…
Markov chain Monte Carlo searches for Galactic binaries in Mock LISA Data Challenge 1B data sets
Miquel Trias, Alberto Vecchio, John Veitch
We are developing a Bayesian approach based on Markov chain Monte Carlo techniques to search for and extract information about white dwarf binary systems with the Laser Interferome…
Triple Michelson Interferometer for a Third-Generation Gravitational Wave Detector
A. Freise, S. Chelkowski, S. Hild +3
The upcoming European design study `Einstein gravitational-wave Telescope' represents the first step towards a substantial, international effort for the design of a third-generatio…
A Bayesian approach to the follow-up of candidate gravitational wave signals
John Veitch, Alberto Vecchio
Ground-based gravitational wave laser interferometers (LIGO, GEO-600, Virgo and Tama-300) have now reached high sensitivity and duty cycle. We present a Bayesian evidence-based app…