E. Cesarini
A5024894594- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Geophysics and Sensor Technology
- Advanced Frequency and Time Standards
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Radio Astronomy Observations and Technology
- Seismic Waves and Analysis
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Statistical and numerical algorithms
- Cold Atom Physics and Bose-Einstein Condensates
- Superconducting Materials and Applications
- Mechanical and Optical Resonators
- Magnetic confinement fusion research
- Seismology and Earthquake Studies
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Adaptive optics and wavefront sensing
- Thermoelastic and Magnetoelastic Phenomena
- Computational Physics and Python Applications
- earthquake and tectonic studies
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2015-2024
Université Paris Cité
2023
Laboratoire AstroParticule et Cosmologie
2023
Centre National de la Recherche Scientifique
2023
Istituto Nazionale di Fisica Nucleare
2009-2022
Enrico Fermi Center for Study and Research
2017-2021
University of Milano-Bicocca
2019
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2019
University of Rome Tor Vergata
2016-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2014-2016
Advanced Virgo is the project to upgrade interferometric detector of gravitational waves, with aim increasing number observable galaxies (and thus detection rate) by three orders magnitude. The now in an advanced construction phase and assembly integration will be completed end 2015. part a network, alongside two LIGO detectors US GEO HF Germany, goal contributing early waves opening new window observation on universe. In this paper we describe main features outline status construction.
Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the limit is injection squeezed vacuum states light into interferometer's dark port. Here, we report on successful application this technology improve shot sensitivity Advanced Virgo detector. A enhancement up 3.2±0.1 dB beyond achieved. This nonclassical improvement corresponds 5%–8% increase binary neutron star horizon. The squeezing was...
This paper presents a complete description of Virgo, the French-Italian gravitational wave detector. The detector, built at Cascina, near Pisa (Italy), is very large Michelson interferometer, with 3 km-long arms. In this paper, following presentation physics requirements, leading to specifications for construction detailed all its different elements given. These include civil engineering infrastructures, huge ultra-high vacuum (UHV) chamber (about 6000 cubic metres), optical components,...
Abstract We perform a statistical standard siren analysis of GW170817. Our does not utilize knowledge NGC 4993 as the unique host galaxy optical counterpart to Instead, we consider each within GW170817 localization region potential host; combining redshifts from all galaxies with distance estimate provides an Hubble constant, H 0 . Considering brighter than equally likely binary neutron star merger, find km s −1 Mpc (maximum posteriori and 68.3% highest density posterior interval; assuming...
The Virgo detector has now finished its first science run; a mode duty cycle of more than 80% and 4.5 Mpc horizon distance for binary neutron star inspiral sources were achieved. Commissioning breaks organized during the run which permitted improvement sensitivity robustness interferometer against environmental perturbations like bad weather earthquakes. post-run commissioning phase started, with goal preparing next upgrade step detector, Virgo+.
We describe the present state and future evolution of Virgo gravitational wave detector, realized by Collaboration at European Gravitational Observatory, in Cascina near Pisa Italy. summarize basic principles operation design features detector. sensitivity due to a series intermediate upgrades called Virgo+ which is being completed this year includes new monolithic suspensions. scientific potential Finally we discuss plans for second generation Advanced Virgo, introducing its features,...
We report on the status of Virgo detector, under commissioning. will focus last year's activity. The two commissioning runs performed during 2005 allowed us to reach a sensitivity h ∼ 6 × 10 −22 . data obtained were used test few analysis algorithms, namely coalescing binaries and burst searches. main improvements made detector this year be described, as well plans activities foreseen in coming years.
Abstract The Advanced Virgo detector has contributed with its data to the rapid growth of number detected GW signals in past few years, alongside two LIGO instruments. First during last month Observation Run 2 (O2) August 2017 (with, most notably, compact binary mergers GW170814 and GW170817), then full 3 (O3): an 11 months taking period, between April 2019 March 2020, that led addition 79 events catalog transient sources maintained by LIGO, now KAGRA. These discoveries manifold exploitation...
The Virgo collaboration has just concluded its first long science run (VSR1). In these four months the detector achieved a good duty cycle, larger than 80%, and an average horizon distance for binary neutron star system sources of about 4 Mpc. An intense commissioning activity was resumed after complete to further increase performances prepare Virgo+ upgrades. during last achievements are briefly discussed here.
Abstract The three advanced Virgo and LIGO gravitational wave detectors participated to the third observing run (O3) between 1 April 2019 15:00 UTC 27 March 2020 17:00 UTC, leading several detections per month. This paper describes detector calibration reconstruction of strain h ( t ) during O3, as well estimation associated uncertainties. For first time, photon technique been used reference for calibration, which allowed cross-calibrate amplitude detectors. previous reference, so-called...
In this Letter, we present the design and performance of frequency-dependent squeezed vacuum source that will be used for broadband quantum noise reduction Advanced Virgo Plus gravitational-wave detector in upcoming observation run. The field is generated by a phase rotation frequency-independent state through 285 m long, high-finesse, near-detuned optical resonator. With about 8.5 dB squeezing, up to 5.6 suppression has been measured at high frequency while close filter cavity resonance...
Virgo is one of the large, ground-based interferometers aimed at detecting gravitational waves. One technical problems limiting its sensitivity caused by light in output beams which backscattered seismically excited surfaces and couples back into main beam interferometer. The resulting noise was thoroughly studied, measured mitigated before Virgo's second science run (VSR2). residual during VSR2, increases periods with a large microseism activity, accurately predicted theoretical model....
The Advanced Virgo interferometer is the upgraded version of detector having goal to extend by a factor 10 observation horizon in universe and consequently increase detection rate three orders magnitude. Its installation progress expected be completed late 2015. In this proceeding we will present scheme main challenging technical features give an outline status foreseen time schedule which bring its full operation.
In August 2017, Advanced Virgo joined LIGO for the end of O2 run, leading to first gravitational waves detections with three-detector network. This paper describes calibration and wave strain h(t) reconstruction during O2. The methods are same as ones developed initial detector have already been described in previous publications, this summarizes differences emphasis is put on estimating systematic uncertainties. Three versions signal computed an online version two post-run reprocessed...
The quantum radiation pressure and the shot noise in laser-interferometric gravitational wave detectors constitute a macroscopic manifestation of Heisenberg inequality. If can be easily observed, observation has been elusive, so far, due to technical competing with effects. Here, we discuss evidence Advanced Virgo detector. In our experiment, inject squeezed vacuum states light into interferometer order manipulate backaction on 42 kg mirrors observe corresponding driven displacement at...
Loss angle measurements in ultralow mechanical loss materials is normally affected by a large systematic error due to the excess losses introduced suspension system used hold samples. Crystals such as sapphire and silicon or amorphous fused silica can have angles range of 10(-10)-10(-7); are extreme interest detection small displacements it required quantum measurements, frequency stabilization, Micro Electro-Mechanical Systems (MEMS), gravitational wave research. In proposed here sample...
The Virgo detector is a kilometer-length interferometer for gravitational wave detection located near Pisa (Italy). During its second science run (VSR2) in 2009, 6 months of data were accumulated with sensitivity close to design. In this paper, the methods used determine parameters estimation and reconstruction are described. main quantities be calibrated frequency response mirror actuation sensing output power. Focus also put on their absolute timing. monitoring calibration parameter...
Sources of geophysical noise (such as wind, sea waves and earthquakes) or anthropogenic impact ground-based gravitational-wave interferometric detectors, causing transient sensitivity worsening gaps in data taking. During the one year-long third Observing Run (O3: from April 01, 2019 to March 27, 2020), Virgo Collaboration collected a statistically significant dataset, used this article study response detector variety environmental conditions. We correlated parameters global performance,...
The commissioning of the Virgo gravitational wave detector has restarted after several major hardware upgrades carried out during winter 2005. Now is fully operative and its sensitivity greatly improved continually improving. A program short scientific data taking already started moving towards a period continuous taking, which should start at end May 2007. actual status reported, describing as well limiting noises mid-term plans.
Detector characterization and data quality studies -- collectively referred to as {\em DetChar} activities in this article are paramount the scientific exploitation of joint dataset collected by LIGO-Virgo-KAGRA global network ground-based gravitational-wave (GW) detectors. They take place during each phase operation instruments (upgrade, tuning optimization, taking), required at all steps dataflow (from acquisition final list GW events) operate various latencies near real-time vet public...
Abstract While completing the commissioning phase to prepare Virgo interferometer for next joint Observation Run (O4), collaboration is also finalizing design of upgrades detector be employed in following (O5). The major upgrade will concern decreasing thermal noise limit, which imply using very large test masses and increased laser beam size. But this not only implemented break between O4 O5 observation runs increase strain sensitivity. paper cover challenges linked implications on...
The Virgo experiment, located near Pisa, Italy, is a large laser Michelson interferometer aiming at the first direct detection of gravitational waves. monitors relative distance its mirrors placed ends two 3 km-long perpendicular arms. goal to measure spectral differential variations arm lengths 10 −18 m/Hz 1/2 in frequency range from Hz kHz. Avoiding spurious motions optical components therefore essential detect Since ground motion 9 orders magnitude larger than length induced by waves,...