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107 results on '"Palomba, Cristiano"'

1. Method to search for inspiraling planetary-mass ultra-compact binaries using the generalized frequency-Hough transform in LIGO O3a data

Author: Miller, Andrew L., Aggarwal, Nancy, Clesse, Sebastien, De Lillo, Federico, Sachdev, Surabhi, Astone, Pia, Palomba, Cristiano, Piccinni, Ornella J., and Pierini, Lorenzo
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract: Gravitational waves from sub-solar mass primordial black holes could be detected in LIGO, Virgo and KAGRA data. Here, we apply a method originally designed to look for rapidly spinning-down neutron stars, the generalized frequency-Hough transform, to search for planetary-mass primordial black holes using data from the first half of the third observing run of advanced LIGO. In this companion paper to arXiv:2402.19468, in which the main results of our search are presented, we delve into the details of the search methodology, the choices we have made regarding the parameter space to explore, the follow-up procedure we use to confirm or reject possible candidates returned in our search, and a comparison of our analytic procedure of generating upper limits to those obtained through injections., Comment: 13 pages, 10 figures -- comments welcome! A portion of this article draws from the appendix of arXiv:2402.19468v1, which is not present in the latest version (v2)
Published: 2024

2. A neural networks method to search for long transient gravitational waves

Author: Attadio, Francesca, Ricca, Leonardo, Serra, Marco, Palomba, Cristiano, Astone, Pia, Dall'Osso, Simone, Pra, Stefano Dal, D'Antonio, Sabrina, Di Giovanni, Matteo, D'Onofrio, Luca, Leaci, Paola, Muciaccia, Federico, Pierini, Lorenzo, and Tehrani, Francesco Safai
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present a new method to search for long transient gravitational waves signals, like those expected from fast spinning newborn magnetars, in interferometric detector data. Standard search techniques are computationally unfeasible (matched filtering) or very demanding (sub-optimal semi-coherent methods). We explored a different approach by means of machine learning paradigms, to define a fast and inexpensive procedure. We used convolutional neural networks to develop a classifier that is able to discriminate between the presence or the absence of a signal. To complement the classification and enhance its effectiveness, we also developed a denoiser. We studied the performance of both networks with simulated colored noise, according to the design noise curve of LIGO interferometers. We show that the combination of the two models is crucial to increase the chance of detection. Indeed, as we decreased the signal initial amplitude (from $10^{-22}$ down to $10^{-23}$) the classification task became more difficult. In particular, we could not correctly tag signals with an initial amplitude of $2 \times 10^{-23}$ without using the denoiser. By studying the performance of the combined networks, we found a good compromise between the search false alarm rate (2$\%$) and efficiency (90$\%$) for a single interferometer. In addition, we demonstrated that our method is robust with respect to changes in the power law describing the time evolution of the signal frequency. Our results highlight the computationally low cost of this method to generate triggers for long transient signals. The study carried out in this work lays the foundations for further improvements, with the purpose of developing a pipeline able to perform systematic searches of long transient signals., Comment: 14 pages, 14 figures, submitted to PRD
Published: 2024

3. A new semi-coherent targeted search for continuous gravitational waves from pulsars in binary systems

Author: Mirasola, Lorenzo, Leaci, Paola, Astone, Pia, D'Onofrio, Luca, Dall'Osso, Simone, De Falco, Alessandro, Lai, Michela, Mastrogiovanni, Simone, Palomba, Cristiano, Riggio, Alessandro, and Sanna, Andrea
Subjects: General Relativity and Quantum Cosmology, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present a novel semi-coherent targeted search method for continuous gravitational waves (CW) emitted by pulsars in binary systems. The method is based on a custom optimization of the coherence time according to the orbital parameters and their uncertainties, as provided by electromagnetic observations. While rotating pulsars are expected to produce quasi-monochromatic CWs in their reference frame, their orbital motion introduces an additional modulation in the observer frame, alongside the one due to the Earth's motion. As a result, the received signal is dispersed across a frequency range and corrections, aimed at removing the orbital modulation, are therefore required to achieve detection. However, Doppler corrections can, in some cases, significantly vary within the uncertainties with which orbital parameters are known. In order to optimally exploit the constraints drawn from electromagnetic observations we implement a semi-coherent search, more robust than fully coherent methods, in which the coherence time is evaluated for each source taking into account uncertainties in its orbital parameters. This method was tested and applied to a set of twelve targets from the ATNF catalogue. The search identified a single outlier which astrophysical origin has been confidently excluded. For the first time to our knowledge, we then set upper limits on the signal strain from these 12 pulsars, the lowest being $h_{UL}\sim1.06\cdot10^{-25}$ for PSR J1326-4728B.
Published: 2024

4. Gravitational wave constraints on planetary-mass primordial black holes using LIGO O3a data

Author: Miller, Andrew L., Aggarwal, Nancy, Clesse, Sébastien, De Lillo, Federico, Sachdev, Surabhi, Astone, Pia, Palomba, Cristiano, Piccinni, Ornella J., and Pierini, Lorenzo
Subjects: General Relativity and Quantum Cosmology, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Gravitational waves from sub-solar mass inspiraling compact objects would provide almost smoking-gun evidence for primordial black holes (PBHs). We perform the first search for inspiraling planetary-mass compact objects in equal-mass and highly asymmetric mass-ratio binaries using data from the first half of the LIGO-Virgo-KAGRA third observing run. Though we do not find any significant candidates, we determine the maximum luminosity distance reachable with our search to be of $O(0.1-100)$ kpc, and corresponding model-independent upper limits on the merger rate densities to be $O(10^{3}-10^{-7})$ kpc$^{-3}$yr$^{-1}$ for systems with chirp masses of $O(10^{-4}-10^{-2})M_\odot$, respectively. Furthermore, we interpret these rate densities as arising from PBH binaries and constrain the fraction of dark matter that such objects could comprise. For equal-mass PBH binaries, we find that these objects would compose less than 4-100% of DM for PBH masses of $10^{-2}M_\odot$ to $2\times 10^{-3}M_\odot$, respectively. For asymmetric binaries, assuming one black hole mass corresponds to a peak in the mass function at 2.5$M_\odot$, a PBH dark-matter fraction of 10% and a second, much lighter PBH, we constrain the mass function of the second PBH to be less than 1 for masses between $1.5\times 10^{-5}M_\odot$ and $2\times 10^{-4}M_\odot$. Our constraints, released on Zenodo, are robust enough to be applied to any PBH or exotic compact object binary formation models, and complement existence microlensing results. More details about our search can be found in our companion paper., Comment: 6 pages, accepted in PRL. Comments are welcome! Upper limit data on Zenodo: https://dx.doi.org/10.5281/zenodo.10724845. Companion paper: arXiv:2407.17052. The appendix in v1 has been moved to our companion paper, which contains a lot more details about our method
Published: 2024
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5. A weighted multidetector extension to the 5-vector method for the search of continuous gravitational wave signals

Author: D'Onofrio, Luca, De Rosa, Rosario, and Palomba, Cristiano
Subjects: General Relativity and Quantum Cosmology
Abstract: The 5-vector method is one of the main pipeline used by the LIGO-Virgo-KAGRA Collaboration for the analysis of continuous gravitational waves (CWs). This method is a matched filter in the frequency domain based on the splitting in five frequencies of the expected gravitational wave frequency due to the Earth sidereal motion. The data 5-vector is composed by five components, each defined as the Fourier transform of the data at one of the five frequencies where the signal power is split. When dealing with a scenario involving $n$ detectors, the standard multidetector extension combines the data 5-vector from each detector, resulting in a total of $5n$ components. In this letter, we introduce a novel multidetector extension that goes beyond the standard approach. It takes into consideration the varying noise levels and observation times associated with each detector, offering a more sophisticated and effective approach for CWs analysis.
Published: 2023

6. Doppler orbital correction for the targeted search of known pulsars with the 5-vector method

Author: D'Onofrio, Luca, De Rosa, Rosario, Leaci, Paola, and Palomba, Cristiano
Subjects: General Relativity and Quantum Cosmology
Abstract: Pulsars are promising targets for the first detection of continuous gravitational waves (CWs) by the LIGO-Virgo-KAGRA (LVK) Collaboration. Targeted searches leverage critical information derived from continued monitoring of pulsars related to the spin evolution, astrometry, and binary orbit. This information maximizes the probability to detect CW signals using full coherent methods. The 5-vector method is one of the three pipelines used by the LVK Collaboration for the targeted search of CWs from known pulsars. In this letter, we describe the first implementation and test of an heterodyne method to correct the orbital Doppler effect for pulsars in binary systems for the 5-vector targeted search., Comment: arXiv admin note: substantial text overlap with arXiv:2311.08229
Published: 2023

7. Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n-vector ensemble method

Author: D'Onofrio, Luca, De Rosa, Rosario, Palomba, Cristiano, Leaci, Paola, Piccinni, Ornella J., Sequino, Valeria, Errico, Luciano, Trozzo, Lucia, Palfreyman, Jim, McKee, James W., Meyers, Bradley W., Stairs, Ingrid, Guillemot, Lucas, Cognard, Ismael, Theureau, Gilles, Keith, Michael J., Lyne, Andrew, Flynn, Chris, and Stappers, Ben
Subjects: General Relativity and Quantum Cosmology, Physics - Data Analysis, Statistics and Probability
Abstract: The 5n-vector ensemble method is a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this paper, we apply the 5n-vector ensemble method to the O3 data set from the LIGO and Virgo detectors considering an ensemble of 201 known pulsars. We find no evidence for a signal from the ensemble and set a 95% credible upper limit on the mean ellipticity assuming a common exponential distribution for the pulsars' ellipticities. Using two independent hierarchical Bayesian procedures, we find upper limits of $1.2 \times 10^{-9}$ and $2.5 \times 10^{-9}$ on the mean ellipticity for the 201 analyzed pulsars.
Published: 2023
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8. Enabling multi-messenger astronomy with continuous gravitational waves: early warning and sky localization of binary neutron stars in Einstein Telescope

Author: Miller, Andrew L., Singh, Neha, and Palomba, Cristiano
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract: Next-generation gravitational-wave detectors will provide unprecedented sensitivity to inspiraling binary neutron stars and black holes, enabling detections at the peak of star formation and beyond. However, the signals from these systems will last much longer than those in current detectors, and overlap in both time and frequency, leading to increased computational cost to search for them with standard matched filtering analyses, and a higher probability that they are observed in the presence of non-Gaussian noise. We therefore present a method to search for gravitational waves from compact binary inspirals in next-generation detectors that is computationally efficient and robust against gaps in data collection and noise non-stationarities. Our method finds tracks in the time/frequency plane of the detector that uniquely describe specific inspiraling systems. We find that we could detect $\sim 5$ overlapping, intermediate-strength signals (matched-filter signal-to-noise ratio $\rho\approx 58$) without a sensitivity loss. Additionally, we demonstrate that our method can enable multi-messenger astronomy: using only low frequencies ($2-20$ Hz), we could warn astronomers $\sim 2.5$ hours before a GW170817-like merger at 40 Mpc and provide a sky localization of $\sim 20$ deg$^2$ using only one ``L'' of Einstein Telescope. Additionally, assuming that primordial black holes exist, we derive projected constraints on the fraction of dark matter they could compose, $f_{\rm PBH}\sim 10^{-6}-10^{-4}$, for $\sim 1-0.1M_\odot$ equal-mass systems, respectively, using a rate suppression factor $f_{\rm sup}=2.5\times 10^{-3}$. Comparing matched filtering searches to our proposed method at a fixed sensitivity, we find a factor of $\sim10-50$ speed-up when we begin an analysis at a frequency of 5 Hz up to 12 Hz for a system with a chirp mass between $\sim[1,2]M_\odot$., Comment: 17 pages, 14 figures, comments welcome!
Published: 2023
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9. Characterizing Gravitational Wave Detector Networks: From A$^\sharp$ to Cosmic Explorer

Author: Gupta, Ish, Afle, Chaitanya, Arun, K. G., Bandopadhyay, Ananya, Baryakhtar, Masha, Biscoveanu, Sylvia, Borhanian, Ssohrab, Broekgaarden, Floor, Corsi, Alessandra, Dhani, Arnab, Evans, Matthew, Hall, Evan D., Hannuksela, Otto A., Kacanja, Keisi, Kashyap, Rahul, Khadkikar, Sanika, Kuns, Kevin, Li, Tjonnie G. F., Miller, Andrew L., Nitz, Alexander Harvey, Owen, Benjamin J., Palomba, Cristiano, Pearce, Anthony, Phurailatpam, Hemantakumar, Rajbhandari, Binod, Read, Jocelyn, Romano, Joseph D., Sathyaprakash, Bangalore S., Shoemaker, David H., Singh, Divya, Vitale, Salvatore, Barsotti, Lisa, Berti, Emanuele, Cahillane, Craig, Chen, Hsin-Yu, Fritschel, Peter, Haster, Carl-Johan, Landry, Philippe, Lovelace, Geoffrey, McClelland, David, Slagmolen, Bram J J, Smith, Joshua, Soares-Santos, Marcelle, Sun, Ling, Tanner, David, Yamamoto, Hiro, and Zucker, Michael
Subjects: General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Gravitational-wave observations by the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo have provided us a new tool to explore the Universe on all scales from nuclear physics to the cosmos and have the massive potential to further impact fundamental physics, astrophysics, and cosmology for decades to come. In this paper we have studied the science capabilities of a network of LIGO detectors when they reach their best possible sensitivity, called A#, given the infrastructure in which they exist and a new generation of observatories that are factor of 10 to 100 times more sensitive (depending on the frequency), in particular a pair of L-shaped Cosmic Explorer observatories (one 40 km and one 20 km arm length) in the US and the triangular Einstein Telescope with 10 km arms in Europe. The presence of one or two A# observatories in a network containing two or one next generation observatories, respectively, will provide good localization capabilities for facilitating multimessenger astronomy and precision measurement of the Hubble parameter. Two Cosmic Explorer observatories are indispensable for achieving precise localization of binary neutron star events, facilitating detection of electromagnetic counterparts and transforming multimessenger astronomy. Their combined operation is even more important in the detection and localization of high-redshift sources, such as binary neutron stars, beyond the star-formation peak, and primordial black hole mergers, which may occur roughly 100 million years after the Big Bang. The addition of the Einstein Telescope to a network of two Cosmic Explorer observatories is critical for accomplishing all the identified science metrics. For most metrics the triple network of next generation terrestrial observatories are a factor 100 better than what can be accomplished by a network of three A# observatories., Comment: 48 pages, 20 figures, 14 tables
Published: 2023

10. Cosmic Explorer: A Submission to the NSF MPSAC ngGW Subcommittee

Author: Evans, Matthew, Corsi, Alessandra, Afle, Chaitanya, Ananyeva, Alena, Arun, K. G., Ballmer, Stefan, Bandopadhyay, Ananya, Barsotti, Lisa, Baryakhtar, Masha, Berger, Edo, Berti, Emanuele, Biscoveanu, Sylvia, Borhanian, Ssohrab, Broekgaarden, Floor, Brown, Duncan A., Cahillane, Craig, Campbell, Lorna, Chen, Hsin-Yu, Daniel, Kathryne J., Dhani, Arnab, Driggers, Jennifer C., Effler, Anamaria, Eisenstein, Robert, Fairhurst, Stephen, Feicht, Jon, Fritschel, Peter, Fulda, Paul, Gupta, Ish, Hall, Evan D., Hammond, Giles, Hannuksela, Otto A., Hansen, Hannah, Haster, Carl-Johan, Kacanja, Keisi, Kamai, Brittany, Kashyap, Rahul, Key, Joey Shapiro, Khadkikar, Sanika, Kontos, Antonios, Kuns, Kevin, Landry, Michael, Landry, Philippe, Lantz, Brian, Li, Tjonnie G. F., Lovelace, Geoffrey, Mandic, Vuk, Mansell, Georgia L., Martynov, Denys, McCuller, Lee, Miller, Andrew L., Nitz, Alexander Harvey, Owen, Benjamin J., Palomba, Cristiano, Read, Jocelyn, Phurailatpam, Hemantakumar, Reddy, Sanjay, Richardson, Jonathan, Rollins, Jameson, Romano, Joseph D., Sathyaprakash, Bangalore S., Schofield, Robert, Shoemaker, David H., Sigg, Daniel, Singh, Divya, Slagmolen, Bram, Sledge, Piper, Smith, Joshua, Soares-Santos, Marcelle, Strunk, Amber, Sun, Ling, Tanner, David, van Son, Lieke A. C., Vitale, Salvatore, Willke, Benno, Yamamoto, Hiro, and Zucker, Michael
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Gravitational-wave astronomy has revolutionized humanity's view of the universe, a revolution driven by observations that no other field can make. This white paper describes an observatory that builds on decades of investment by the National Science Foundation and that will drive discovery for decades to come: Cosmic Explorer. Major discoveries in astronomy are driven by three related improvements: better sensitivity, higher precision, and opening new observational windows. Cosmic Explorer promises all three and will deliver an order-of-magnitude greater sensitivity than LIGO. Cosmic Explorer will push the gravitational-wave frontier to almost the edge of the observable universe using technologies that have been proven by LIGO during its development. With the unprecedented sensitivity that only a new facility can deliver, Cosmic Explorer will make discoveries that cannot yet be anticipated, especially since gravitational waves are both synergistic with electromagnetic observations and can reach into regions of the universe that electromagnetic observations cannot explore. With Cosmic Explorer, scientists can use the universe as a laboratory to test the laws of physics and study the nature of matter. Cosmic Explorer allows the United States to continue its leading role in gravitational-wave science and the international network of next-generation observatories. With its extraordinary discovery potential, Cosmic Explorer will deliver revolutionary observations across astronomy, physics, and cosmology including: Black Holes and Neutron Stars Throughout Cosmic Time, Multi-Messenger Astrophysics and Dynamics of Dense Matter, New Probes of Extreme Astrophysics, Fundamental Physics and Precision Cosmology, Dark Matter and the Early Universe.
Published: 2023

11. Science with the Einstein Telescope: a comparison of different designs

Author: Branchesi, Marica, Maggiore, Michele, Alonso, David, Badger, Charles, Banerjee, Biswajit, Beirnaert, Freija, Belgacem, Enis, Bhagwat, Swetha, Boileau, Guillaume, Borhanian, Ssohrab, Brown, Daniel David, Chan, Man Leong, Cusin, Giulia, Danilishin, Stefan L., Degallaix, Jerome, De Luca, Valerio, Dhani, Arnab, Dietrich, Tim, Dupletsa, Ulyana, Foffa, Stefano, Franciolini, Gabriele, Freise, Andreas, Gemme, Gianluca, Goncharov, Boris, Ghosh, Archisman, Gulminelli, Francesca, Gupta, Ish, Gupta, Pawan Kumar, Harms, Jan, Hazra, Nandini, Hild, Stefan, Hinderer, Tanja, Heng, Ik Siong, Iacovelli, Francesco, Janquart, Justin, Janssens, Kamiel, Jenkins, Alexander C., Kalaghatgi, Chinmay, Koroveshi, Xhesika, Li, Tjonnie G. F., Li, Yufeng, Loffredo, Eleonora, Maggio, Elisa, Mancarella, Michele, Mapelli, Michela, Martinovic, Katarina, Maselli, Andrea, Meyers, Patrick, Miller, Andrew L., Mondal, Chiranjib, Muttoni, Niccolò, Narola, Harsh, Oertel, Micaela, Oganesyan, Gor, Pacilio, Costantino, Palomba, Cristiano, Pani, Paolo, Pasqualetti, Antonio, Perego, Albino, Pèrigois, Carole, Pieroni, Mauro, Piccinni, Ornella Juliana, Puecher, Anna, Puppo, Paola, Ricciardone, Angelo, Riotto, Antonio, Ronchini, Samuele, Sakellariadou, Mairi, Samajdar, Anuradha, Santoliquido, Filippo, Sathyaprakash, B. S., Steinlechner, Jessica, Steinlechner, Sebastian, Utina, Andrei, Broeck, Chris Van Den, and Zhang, Teng
Subjects: General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has a reference configuration based on a triangular shape consisting of three nested detectors with 10 km arms, where in each arm there is a `xylophone' configuration made of an interferometer tuned toward high frequencies, and an interferometer tuned toward low frequencies and working at cryogenic temperature. Here, we examine the scientific perspectives under possible variations of this reference design. We perform a detailed evaluation of the science case for a single triangular geometry observatory, and we compare it with the results obtained for a network of two L-shaped detectors (either parallel or misaligned) located in Europe, considering different choices of arm-length for both the triangle and the 2L geometries. We also study how the science output changes in the absence of the low-frequency instrument, both for the triangle and the 2L configurations. We examine a broad class of simple `metrics' that quantify the science output, related to compact binary coalescences, multi-messenger astronomy and stochastic backgrounds, and we then examine the impact of different detector designs on a more specific set of scientific objectives., Comment: 197 pages, 73 figures. v2: corrections in the part on the sensitivity to stochastic backgrounds. Accepted in JCAP
Published: 2023
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12. Impact of signal clusters in wide-band searches for continuous gravitational waves

Author: Pierini, Lorenzo, Astone, Pia, Palomba, Cristiano, Nyquist, Aidan, Dall'Osso, Simone, D'Antonio, Sabrina, Frasca, Sergio, La Rosa, Iuri, Leaci, Paola, Muciaccia, Federico, Piccinni, Ornella J., and Rei, Luca
Subjects: General Relativity and Quantum Cosmology
Abstract: In this paper we present a study of some relevant steps of the hierarchical frequency-Hough (FH) pipeline, used within the LIGO and Virgo Collaborations for wide-parameter space searches of continuous gravitational waves (CWs) emitted, for instance, by spinning neutron stars (NSs). Because of their weak expected amplitudes, CWs have not been still detected so far. These steps, namely the spectral estimation, the {\it peakmap} construction and the procedure to select candidates in the FH plane, are critical as they contribute to determine the final search sensitivity. Here, we are interested in investigating their behavior in the (presently quite) extreme case of signal clusters, due to many and strong CW sources, emitting gravitational waves (GWs) within a small (i.e. <1 Hz wide) frequency range. This could happen for some kinds of CW sources detectable by next generation detectors, like LISA, Einstein Telescope and Cosmic Explorer. Moreover, this possibility has been recently raised even for current Earth-based detectors, in some scenarios of CW emission from ultralight boson clouds around stellar mass black holes (BHs). We quantitatively evaluate the robustness of the FH analysis procedure, designed to minimize the loss of single CW signals, under the unusual situation of signal clusters. Results depend mainly on how strong in amplitude and dense in frequency the signals are, and on the range of frequency they cover. We show that indeed a small sensitivity loss may happen in presence of a very high mean signal density affecting a frequency range of the order of one Hertz, while when the signal cluster covers a frequency range of one tenth of Hertz, or less, we may actually have a sensitivity gain. Overall, we demonstrate the FH to be robust even in presence of moderate-to-large signal clusters.
Published: 2022
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13. Distinguishing between dark-matter interactions with gravitational-wave detectors

Author: Miller, Andrew L., Badaracco, Francesca, and Palomba, Cristiano
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract: Ground-based gravitational-wave interferometers could directly probe the existence of ultralight dark matter ($\mathcal{O}(10^{-14}-10^{-11})$ eV/$c^2$) that couples to standard-model particles in the detectors. Recently, many techniques have been developed to extract a variety of potential dark-matter signals from noisy gravitational-wave data; however, little effort has gone into ways to distinguish between types of dark matter that could directly interact with the interferometers. In this work, we employ the Wiener filter to follow-up candidate dark-matter interaction signals. The filter captures the stochastic nature of these signals, and, in simulations, successfully identifies which type of dark matter interacts with the interferometers. We apply the Wiener filter to outliers that remained in the LIGO/Virgo/KAGRA search for dark photons in data from the most recent observing (O3), and show that they are consistent with noise disturbances. Our proof-of-concept analysis demonstrates that the Wiener filter can be a powerful technique to confirm or deny the presence of dark-matter interaction signals in gravitational-wave data, and distinguish between scalar and vector dark-matter interactions., Comment: 10 pages, 8 figures, published in PRD
Published: 2022
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14. Probing new light gauge bosons with gravitational-wave interferometers using an adapted semi-coherent method

Author: Miller, Andrew L., Astone, Pia, Bruno, Giacomo, Clesse, Sebastien, D'Antonio, Sabrina, Depasse, Antoine, De Lillo, Federico, Frasca, Sergio, La Rosa, Iuri, Leaci, Paola, Palomba, Cristiano, Piccinni, Ornella J., Pierini, Lorenzo, Rei, Luca, and Tanasijczuk, Andres
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract: We adapt a method, originally developed for searches for quasi-monochromatic, quasi-infinite gravitational-wave signals, to directly detect new light gauge bosons with laser interferometers, which could be candidates for dark matter. To search for these particles, we optimally choose the analysis coherence time as a function of boson mass, such that all of the signal power will be confined to one frequency bin. We focus on the dark photon, a gauge boson that could couple to baryon or baryon-lepton number, and explain that its interactions with gravitational-wave interferometers result in a narrow-band, stochastic signal. We provide an end-to-end analysis scheme, estimate its computational cost, and investigate follow-up techniques to confirm or rule out dark matter candidates. Furthermore, we derive a theoretical estimate of the sensitivity, and show that it is consistent with both the empirical sensitivity determined through simulations, and results from a cross-correlation search. Finally, we place Feldman-Cousins upper limits using data from LIGO Livingston's second observing run, which give a new and strong constraint on the coupling of gauge bosons to the interferometer., Comment: 16 pages, 14 figures
Published: 2020
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15. Science Case for the Einstein Telescope

Author: Maggiore, Michele, Broeck, Chris van den, Bartolo, Nicola, Belgacem, Enis, Bertacca, Daniele, Bizouard, Marie Anne, Branchesi, Marica, Clesse, Sebastien, Foffa, Stefano, García-Bellido, Juan, Grimm, Stefan, Harms, Jan, Hinderer, Tanja, Matarrese, Sabino, Palomba, Cristiano, Peloso, Marco, Ricciardone, Angelo, and Sakellariadou, Mairi
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology
Abstract: The 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., Comment: 51 pages, 14 figures; v3: references added, various improvements. v4: minor changes. Version published in JCAP
Published: 2019
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16. Direct constraints on ultra-light boson mass from searches for continuous gravitational waves

Author: Palomba, Cristiano, D'Antonio, Sabrina, Astone, Pia, Frasca, Sergio, Intini, Giuseppe, La Rosa, Iuri, Leaci, Paola, Mastrogiovanni, Simone, Miller, Andrew L., Muciaccia, Federico, Piccinni, Ornella J., Rei, Luca, and Simula, Francesco
Subjects: Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology
Abstract: \textit{Superradiance} can trigger the formation of an ultra-light boson cloud around a spinning black hole. Once formed, the boson cloud is expected to emit a nearly periodic, long-duration, gravitational-wave signal. For boson masses in the range $(10^{-13}-10^{-11})$ eV, and stellar mass black holes, such signals are potentially detectable by gravitational wave detectors, like Advanced LIGO and Virgo. In this {\it Letter} we present full band upper limits for a generic all-sky search for periodic gravitational waves in LIGO O2 data, and use them to derive - for the first time - direct constraints on the ultra-light scalar boson field mass., Comment: 6 pages, 3 figures
Published: 2019
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17. How effective is machine learning to detect long transient gravitational waves from neutron stars in a real search?

Author: Miller, Andrew L., Astone, Pia, D'Antonio, Sabrina, Frasca, Sergio, Intini, Giuseppe, La Rosa, Iuri, Leaci, Paola, Mastrogiovanni, Simone, Muciaccia, Federico, Mitidis, Andonis, Palomba, Cristiano, Piccinni, Ornella J., Singhal, Akshat, Whiting, Bernard F., and Rei, Luca
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Data Analysis, Statistics and Probability
Abstract: We present a comprehensive study of the effectiveness of Convolution Neural Networks (CNNs) to detect long duration transient gravitational-wave signals lasting $O(hours-days)$ from isolated neutron stars. We determine that CNNs are robust towards signal morphologies that differ from the training set, and they do not require many training injections/data to guarantee good detection efficiency and low false alarm probability. In fact, we only need to train one CNN on signal/noise maps in a single 150 Hz band; afterwards, the CNN can distinguish signals/noise well in any band, though with different efficiencies and false alarm probabilities due to the non-stationary noise in LIGO/Virgo. We demonstrate that we can control the false alarm probability for the CNNs by selecting the optimal threshold on the outputs of the CNN, which appears to be frequency dependent. Finally we compare the detection efficiencies of the networks to a well-established algorithm, the Generalized FrequencyHough (GFH), which maps curves in the time/frequency plane to lines in a plane that relates to the initial frequency/spindown of the source. The networks have similar sensitivities to the GFH but are orders of magnitude faster to run and can detect signals to which the GFH is blind. Using the results of our analysis, we propose strategies to apply CNNs to a real search using LIGO/Virgo data to overcome the obstacles that we would encounter, such as a finite amount of training data. We then use our networks and strategies to run a real search for a remnant of GW170817, making this the first time ever that a machine learning method has been applied to search for a gravitational wave signal from an isolated neutron star.
Published: 2019
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18. A method to search for long duration gravitational wave transients from isolated neutron stars using the generalized FrequencyHough

Author: Miller, Andrew, Astone, Pia, D'Antonio, Sabrina, Frasca, Sergio, Intini, Giuseppe, La Rosa, Iuri, Leaci, Paola, Mastrogiovanni, Simone, Muciaccia, Federico, Palomba, Cristiano, Piccinni, Ornella J., Signhal, Akshat, and Whiting, Bernard F.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Data Analysis, Statistics and Probability
Abstract: We describe a method to detect gravitational waves lasting $O(hours-days)$ emitted by young, isolated neutron stars, such as those that could form after a supernova or a binary neutron star merger, using advanced LIGO/Virgo data. The method is based on a generalization of the FrequencyHough (FH), a pipeline that performs hierarchical searches for continuous gravitational waves by mapping points in the time/frequency plane of the detector to lines in the frequency/spindown plane of the source. We show that signals whose spindowns are related to their frequencies by a power law can be transformed to coordinates where the behavior of these signals is always linear, and can therefore be searched for by the FH. We estimate the sensitivity of our search across different braking indices, and describe the portion of the parameter space we could explore in a search using varying fast Fourier Transform (FFT) lengths., Comment: 15 figures
Published: 2018
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19. Neutron star bulk viscosity, 'spin-flip' and GW emission of newly born magnetars

Author: Dall'Osso, Simone, Stella, Luigi, and Palomba, Cristiano
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The viscosity-driven "spin-flip" instability in newborn magnetars with interior toroidal magnetic fields is re-examined. We calculate the bulk viscosity coefficient ($\zeta$) of cold, $npe \mu$ matter in neutron stars (NS), for selected values of the nuclear symmetry energy and in the regime where $\beta$-equilibration is slower than characteristic oscillation periods. We show that: i) $\zeta$ is larger than previously assumed and the instability timescale correspondingly shorter; ii) for a magnetically-induced ellipticity $\epsilon_B \lesssim 4 \times 10^{-3}$, typically expected in newborn magnetars, spin-flip occurs for initial spin periods $\lesssim 2-3$ ms, with some dependence on the NS equation of state (EoS). We then calculate the detectability of GW signals emitted by newborn magnetars subject to "spin-flip", by accounting also for the reduction in range resulting from realistic signal searches. For an optimal range of $\epsilon_B \sim (1-5) \times 10^{-3}$, and birth spin period $\lesssim 2$ ms, we estimate an horizon of $\gtrsim 4$ Mpc, and $\gtrsim 30$ Mpc, for Advanced and third generation interferometers at design sensitivity, respectively. A supernova (or a kilonova) is expected as the electromagnetic counterpart of such GW events. Outside of the optimal range for GW emission, EM torques are more efficient in extracting the NS spin energy, which may power even brighter EM transients., Comment: 10 pages, 4 figures, accepted for publication in MNRAS
Published: 2018
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20. A weighted multidetector extension to the 5-vector method for the search of continuous gravitational wave signals

Author: D'Onofrio, Luca, primary, De Rosa, Rosario, additional, and Palomba, Cristiano, additional
Published: 2024
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21. Novel directed search strategy to detect continuous gravitational waves from neutron stars in low- and high-eccentricity binary systems

Author: Leaci, Paola, Astone, Pia, D'Antonio, Sabrina, Frasca, Sergio, Palomba, Cristiano, Piccinni, Ornella, and Mastrogiovanni, Simone
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We describe a novel, very fast and robust, directed search incoherent method for periodic gravitational waves (GWs) from neutron stars in binary systems. As directed search, we assume the source sky position to be known with enough accuracy, but all other parameters are supposed to be unknown. We exploit the frequency-modulation due to source orbital motion to unveil the signal signature by commencing from a collection of time and frequency peaks. We validate our pipeline adding 131 artificial continuous GW signals from pulsars in binary systems to simulated detector Gaussian noise, characterized by a power spectral density Sh = 4x10^-24 Hz^-1/2 in the frequency interval [70, 200] Hz, which is overall commensurate with the advanced detector design sensitivities. The pipeline detected 128 signals, and the weakest signal injected and detected has a GW strain amplitude of ~10^-24, assuming one month of gapless data collected by a single advanced detector. We also provide sensitivity estimations, which show that, for a single- detector data covering one month of observation time, depending on the source orbital Doppler modulation, we can detect signals with an amplitude of ~7x10^-25. By using three detectors, and one year of data, we would easily gain more than a factor 3 in sensitivity, translating into being able to detect weaker signals. We also discuss the parameter estimate proficiency of our method, as well as computational budget, which is extremely cheap. In fact, sifting one month of single-detector data and 131 Hz-wide frequency range takes roughly 2.4 CPU hours. Due to the high computational speed, the current procedure can be readily applied in ally-sky schemes, sieving in parallel as many sky positions as permitted by the available computational power.
Published: 2016
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22. A comparison of methods for the detection of gravitational waves from unknown neutron stars

Author: Walsh, Sinead, Pitkin, Matthew, Oliver, Miquel, D'Antonio, Sabrina, Dergachev, Vladimir, Krolak, Andrzej, Astone, Pia, Bejger, Michal, Di Giovanni, Matteo, Dorosh, Orest, Frasca, Sergio, Leaci, Paola, Mastrogiovanni, Simone, Miller, Andrew, Palomba, Cristiano, Papa, Maria Alessandra, Piccinni, Ornella J., Riles, Keith, Sauter, Orion, and Sintes, Alicia M.
Subjects: General Relativity and Quantum Cosmology, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Rapidly rotating neutron stars are promising sources of continuous gravitational wave radiation for the LIGO and Virgo interferometers. The majority of neutron stars in our galaxy have not been identified with electromagnetic observations. All-sky searches for isolated neutron stars offer the potential to detect gravitational waves from these unidentified sources. The parameter space of these blind all-sky searches, which also cover a large range of frequencies and frequency derivatives, presents a significant computational challenge. Different methods have been designed to perform these searches within acceptable computational limits. Here we describe the first benchmark in a project to compare the search methods currently available for the detection of unknown isolated neutron stars. We employ a mock data challenge to compare the ability of each search method to recover signals simulated assuming a standard signal model. We find similar performance among the short duration search methods, while the long duration search method achieves up to a factor of two higher sensitivity. We find the absence of second derivative frequency in the search parameter space does not degrade search sensivity for signals with physically plausible second derivative frequencies. We also report on the parameter estimation accuracy of each search method, and the stability of the sensitivity in frequency, frequency derivative and in the presence of detector noise., Comment: 16 pages, 11 figures
Published: 2016
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23. Semicoherent method to search for continuous gravitational waves

Author: D’Antonio, Sabrina, primary, Palomba, Cristiano, additional, Astone, Pia, additional, Dall’Osso, Simone, additional, Dal Pra, Stefano, additional, Frasca, Sergio, additional, Leaci, Paola, additional, Muciaccia, Federico, additional, Piccinni, Ornella J., additional, Pierini, Lorenzo, additional, and Serra, Marco, additional
Published: 2023
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24. Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n -vector ensemble method

Author: D’Onofrio, Luca, primary, De Rosa, Rosario, additional, Palomba, Cristiano, additional, Leaci, Paola, additional, Piccinni, Ornella J., additional, Sequino, Valeria, additional, Errico, Luciano, additional, Trozzo, Lucia, additional, Palfreyman, Jim, additional, McKee, James W., additional, Meyers, Bradley W., additional, Stairs, Ingrid, additional, Guillemot, Lucas, additional, Cognard, Ismaël, additional, Theureau, Gilles, additional, Keith, Michael J., additional, Lyne, Andrew, additional, Flynn, Chris, additional, and Stappers, Ben, additional
Published: 2023
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25. Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform

Author: Astone, Pia, Colla, Alberto, D'Antonio, Sabrina, Frasca, Sergio, and Palomba, Cristiano
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: In this paper we present a hierarchical data analysis pipeline for all-sky searches of continuous gravitational wave signals, like those emitted by spinning neutron stars asymmetric with respect to the rotation axis, with unknown position, rotational frequency and spin-down. The core of the pipeline is an incoherent step based on a particularly efficient implementation of the Hough transform, that we call frequency-Hough, that maps the data time-frequency plane to the source frequency/spin-down plane for each fixed direction in the sky. Theoretical ROCs and sensitivity curves are computed and the dependency on various thresholds is discussed. A comparison of the sensitivity loss with respect to an "optimal" method is also presented. Several other novelties, with respect to other wide-parameter analysis pipelines, are also outlined. They concern, in particular, the construction of the grid in the parameter space, with over-resolution in frequency and parameter refinement, candidate selection and various data cleaning steps which are introduced to improve search sensitivity and rejection of false candidates., Comment: 27 pages, 20 figures, PRD in press
Published: 2014
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26. A method for narrow-band searches of continuous gravitational wave signals

Author: Astone, Pia, Colla, Alberto, D'Antonio, Sabrina, Frasca, Sergio, Palomba, Cristiano, and Serafinelli, Roberto
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract: Targeted searches of continuous waves from spinning neutron stars normally assume that the frequency of the gravitational wave signal is at a given known ratio with respect to the rotational frequency of the source, e.g. twice for an asymmetric neutron star rotating around a principal axis of inertia. In fact this assumption may well be invalid if, for instance, the gravitational wave signal is due to a solid core rotating at a slightly different rate with respect to the star crust. In this paper we present a method for {\it narrow-band} searches of continuous gravitational wave signals from known pulsars in the data of interferometric detectors. This method assumes source position is known to high accuracy, while a small frequency and spin-down range around the electromagnetic-inferred values is explored. Barycentric and spin-down corrections are done with an efficient time-domain procedure. Sensitivity and computational efficiency estimates are given and results of tests done using simulated data are also discussed., Comment: 13 pages; 6 figures; accepted in PRD
Published: 2014
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27. Coherent search of continuous gravitational wave signals: extension of the 5-vectors method to a network of detectors

Author: Astone, Pia, Colla, Alberto, D'Antonio, Sabrina, Frasca, Sergio, and Palomba, Cristiano
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract: We describe the extension to multiple datasets of a coherent method for the search of continuous gravitational wave signals, based on the computation of 5-vectors. In particular, we show how to coherently combine different datasets belonging to the same detector or to different detectors. In the latter case the coherent combination is the way to have the maximum increase in signal-to-noise ratio. If the datasets belong to the same detector the advantage comes mainly from the properties of a quantity called {\it coherence} which is helpful (in both cases, in fact) in rejecting false candidates. The method has been tested searching for simulated signals injected in Gaussian noise and the results of the simulations are discussed., Comment: 9 pages, 2 figures. Journal of Physics: Conference Series, in press
Published: 2012
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28. The Hough transform search for continuous gravitational waves

Author: Krishnan, Badri, Sintes, Alicia M., Papa, M. A., Schutz, Bernard F., Frasca, Sergio, and Palomba, Cristiano
Subjects: General Relativity and Quantum Cosmology
Abstract: This paper describes an incoherent method to search for continuous gravitational waves based on the Hough transform, a well known technique used for detecting patterns in digital images. We apply the Hough transform to detect patterns in the time-frequency plane of the data produced by an earth-based gravitational wave detector. Two different flavors of searches will be considered, depending on the type of input to the Hough transform: either Fourier transforms of the detector data or the output of a coherent matched-filtering type search. We present the technical details for implementing the Hough transform algorithm for both kinds of searches, their statistical properties, and their sensitivities., Comment: 22 pages, RevTeX4, typos and references corrected. Final PRD version
Published: 2004
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29. Detectability of Gravitational Radiation from Prompt and Delayed Star Collapse to a Black Hole

Author: Palomba, Cristiano
Subjects: Astrophysics
Abstract: We consider the emission of gravitational waves in the two proposed models for the collapse of a massive star to a black hole: the prompt collapse, in which nearly all the star collapses to a black hole in a dynamical time scale, and the delayed collapse, in which a light black hole, or a neutron star, which subsequently accretes matter, forms due to the fall-back achieving, in the neutron star case, the critical mass for black hole formation. Recent simulations strongly support this last scenario. We show that, due to the slowness of fall-back, in the delayed collapse the main burst of gravitational radiation is emitted depending on the parameters, mass and angular momentum, of the initial, light, black hole. We estimate, under different assumptions, the detectability of the emitted gravitational waves showing that such kind of collapse is not particularly suited for detection by forthcoming interferometric detectors. Detectors with high sensitivity at frequencies greater than ~4-5 kHz would be well suited for this kind of sources. We calculate also the final mass distribution function of single black holes., Comment: shortened and re-organized version, 13 pages, 3 figures. Submitted to the International Journal of Modern Physics D
Published: 2000

30. Pulsars ellipticity revised

Author: Palomba, Cristiano
Subjects: Astrophysics
Abstract: We derive new upper limits on the ellipticity of pulsars whose braking index has been measured, more tightening than those usually given, assuming that both a gravitational torque and an electromagnetic one act on them. We show that the measured braking indexes of pulsars are recovered in this model. We consider the electromagnetic torque both constant and varying with time. At the same time constraints on the pulsars initial period and on the amplitude of the gravitational waves emitted are obtained., Comment: 6 pages, to be published in Astronomy & Astrophysics
Published: 1999

31. Science with the Einstein Telescope: a comparison of different designs

Author: Branchesi, Marica, primary, Maggiore, Michele, additional, Alonso, David, additional, Badger, Charles, additional, Banerjee, Biswajit, additional, Beirnaert, Freija, additional, Belgacem, Enis, additional, Bhagwat, Swetha, additional, Boileau, Guillaume, additional, Borhanian, Ssohrab, additional, Brown, Daniel David, additional, Leong Chan, Man, additional, Cusin, Giulia, additional, Danilishin, Stefan L., additional, Degallaix, Jerome, additional, De Luca, Valerio, additional, Dhani, Arnab, additional, Dietrich, Tim, additional, Dupletsa, Ulyana, additional, Foffa, Stefano, additional, Franciolini, Gabriele, additional, Freise, Andreas, additional, Gemme, Gianluca, additional, Goncharov, Boris, additional, Ghosh, Archisman, additional, Gulminelli, Francesca, additional, Gupta, Ish, additional, Kumar Gupta, Pawan, additional, Harms, Jan, additional, Hazra, Nandini, additional, Hild, Stefan, additional, Hinderer, Tanja, additional, Siong Heng, Ik, additional, Iacovelli, Francesco, additional, Janquart, Justin, additional, Janssens, Kamiel, additional, Jenkins, Alexander C., additional, Kalaghatgi, Chinmay, additional, Koroveshi, Xhesika, additional, Li, Tjonnie G.F., additional, Li, Yufeng, additional, Loffredo, Eleonora, additional, Maggio, Elisa, additional, Mancarella, Michele, additional, Mapelli, Michela, additional, Martinovic, Katarina, additional, Maselli, Andrea, additional, Meyers, Patrick, additional, Miller, Andrew L., additional, Mondal, Chiranjib, additional, Muttoni, Niccolò, additional, Narola, Harsh, additional, Oertel, Micaela, additional, Oganesyan, Gor, additional, Pacilio, Costantino, additional, Palomba, Cristiano, additional, Pani, Paolo, additional, Pasqualetti, Antonio, additional, Perego, Albino, additional, Périgois, Carole, additional, Pieroni, Mauro, additional, Piccinni, Ornella Juliana, additional, Puecher, Anna, additional, Puppo, Paola, additional, Ricciardone, Angelo, additional, Riotto, Antonio, additional, Ronchini, Samuele, additional, Sakellariadou, Mairi, additional, Samajdar, Anuradha, additional, Santoliquido, Filippo, additional, Sathyaprakash, B.S., additional, Steinlechner, Jessica, additional, Steinlechner, Sebastian, additional, Utina, Andrei, additional, Van Den Broeck, Chris, additional, and Zhang, Teng, additional
Published: 2023
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32. Impact of signal clusters in wide-band searches for continuous gravitational waves

Author: Pierini, Lorenzo, primary, Astone, Pia, additional, Palomba, Cristiano, additional, Nyquist, Aidan, additional, Dall’Osso, Simone, additional, D’Antonio, Sabrina, additional, Frasca, Sergio, additional, La Rosa, Iuri, additional, Leaci, Paola, additional, Muciaccia, Federico, additional, Piccinni, Ornella J., additional, and Rei, Luca, additional
Published: 2022
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33. The 5n-vector ensemble method

Author: D'Onofrio, Luca, De Rosa, Rosario, and Palomba, Cristiano
Abstract: We present a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars, combining multidetector single pulsar statistics defined through the 5n-vector method. In order to maximize the detection probability, we describe a rank truncation method to select the most promising sources within the ensemble, based on the p-values computed from single pulsar analysis. We also present two different sensitivity tests, using hardware and software injections, to show the improvement in the detection probability.
Published: 2022
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34. Distinguishing between dark-matter interactions with gravitational-wave detectors

Author: Miller, Andrew L., primary, Badaracco, Francesca, additional, and Palomba, Cristiano, additional
Published: 2022
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35. 5n -vector ensemble method for detecting gravitational waves from known pulsars

Author: D’Onofrio, Luca, primary, De Rosa, Rosario, additional, Errico, Luciano, additional, Palomba, Cristiano, additional, Sequino, Valeria, additional, and Trozzo, Lucia, additional
Published: 2022
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36. Continuous Gravitational-Wave Data Analysis with General Purpose Computing on Graphic Processing Units

Author: La Rosa, Iuri, primary, Astone, Pia, additional, D’Antonio, Sabrina, additional, Frasca, Sergio, additional, Leaci, Paola, additional, Miller, Andrew Lawrence, additional, Palomba, Cristiano, additional, Piccinni, Ornella Juliana, additional, Pierini, Lorenzo, additional, and Regimbau, Tania, additional
Published: 2021
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37. Probing new light gauge bosons with gravitational-wave interferometers using an adapted semicoherent method

Author: Miller, Andrew L., primary, Astone, Pia, additional, Bruno, Giacomo, additional, Clesse, Sébastien, additional, D’Antonio, Sabrina, additional, Depasse, Antoine, additional, De Lillo, Federico, additional, Frasca, Sergio, additional, La Rosa, Iuri, additional, Leaci, Paola, additional, Palomba, Cristiano, additional, Piccinni, Ornella J., additional, Pierini, Lorenzo, additional, Rei, Luca, additional, and Tanasijczuk, Andres, additional
Published: 2021
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38. Continuous Gravitational-Wave Data Analysis with General Purpose Computing on Graphic Processing Units

Author: UCL - SST/IRMP - Institut de recherche en mathématique et physique, La Rosa, Iuri, Astone, Pia, D’Antonio, Sabrina, Frasca, Sergio, Leaci, Paola, Miller, Andrew, Palomba, Cristiano, Piccinni, Ornella Juliana, Pierini, Lorenzo, Regimbau, Tania, UCL - SST/IRMP - Institut de recherche en mathématique et physique, La Rosa, Iuri, Astone, Pia, D’Antonio, Sabrina, Frasca, Sergio, Leaci, Paola, Miller, Andrew, Palomba, Cristiano, Piccinni, Ornella Juliana, Pierini, Lorenzo, and Regimbau, Tania
Abstract: We present a new approach to searching for Continuous gravitational Waves (CWs) emitted by isolated rotating neutron stars, using the high parallel computing efficiency and computational power of modern Graphic Processing Units (GPUs). Specifically, in this paper the porting of one of the algorithms used to search for CW signals, the so-called FrequencyHough transform, on the TensorFlow framework, is described. The new code has been fully tested and its performance on GPUs has been compared to those in a CPU multicore system of the same class, showing a factor of 10 speed-up. This demonstrates that GPU programming with general purpose libraries (the those of the TensorFlow framework) of a high-level programming language can provide a significant improvement of the performance of data analysis, opening new perspectives on wide-parameter searches for CWs.
Published: 2021

39. Science case for the Einstein telescope

Author: UCL - SST/IRMP - Institut de recherche en mathématique et physique, Maggiore, Michele, Broeck, Chris Van Den, Bartolo, Nicola, Belgacem, Enis, Bertacca, Daniele, Bizouard, Marie Anne, Branchesi, Marica, Clesse, Sébastien, Foffa, Stefano, García-Bellido, Juan, Grimm, Stefan, Harms, Jan, Hinderer, Tanja, Matarrese, Sabino, Palomba, Cristiano, Peloso, Marco, Ricciardone, Angelo, Sakellariadou, Mairi, UCL - SST/IRMP - Institut de recherche en mathématique et physique, Maggiore, Michele, Broeck, Chris Van Den, Bartolo, Nicola, Belgacem, Enis, Bertacca, Daniele, Bizouard, Marie Anne, Branchesi, Marica, Clesse, Sébastien, Foffa, Stefano, García-Bellido, Juan, Grimm, Stefan, Harms, Jan, Hinderer, Tanja, Matarrese, Sabino, Palomba, Cristiano, Peloso, Marco, Ricciardone, Angelo, and Sakellariadou, Mairi
Abstract: The 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.
Published: 2020

40. Science case for the Einstein telescope

Author: Maggiore, Michele, Broeck, Chris Van Den, Bartolo, Nicola, Belgacem, Enis, Bertacca, Daniele, Bizouard, Marie Anne, Branchesi, Marica, Clesse, Sébastien, Foffa, Stefano, García-Bellido, Juan, Grimm, Stefan, Harms, Jan, Hinderer, Tanja, Matarrese, Sabino, Palomba, Cristiano, Peloso, Marco, Ricciardone, Angelo, Sakellariadou, Mairi, Maggiore, Michele, Broeck, Chris Van Den, Bartolo, Nicola, Belgacem, Enis, Bertacca, Daniele, Bizouard, Marie Anne, Branchesi, Marica, Clesse, Sébastien, Foffa, Stefano, García-Bellido, Juan, Grimm, Stefan, Harms, Jan, Hinderer, Tanja, Matarrese, Sabino, Palomba, Cristiano, Peloso, Marco, Ricciardone, Angelo, and Sakellariadou, Mairi
Abstract: The 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., SCOPUS: re.j, info:eu-repo/semantics/published
Published: 2020

41. Science case for the Einstein telescope

Author: Maggiore, Michele, primary, Broeck, Chris Van Den, additional, Bartolo, Nicola, additional, Belgacem, Enis, additional, Bertacca, Daniele, additional, Bizouard, Marie Anne, additional, Branchesi, Marica, additional, Clesse, Sebastien, additional, Foffa, Stefano, additional, García-Bellido, Juan, additional, Grimm, Stefan, additional, Harms, Jan, additional, Hinderer, Tanja, additional, Matarrese, Sabino, additional, Palomba, Cristiano, additional, Peloso, Marco, additional, Ricciardone, Angelo, additional, and Sakellariadou, Mairi, additional
Published: 2020
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42. How effective is machine learning to detect long transient gravitational waves from neutron stars in a real search?

Author: Miller, Andrew L., primary, Astone, Pia, additional, D’Antonio, Sabrina, additional, Frasca, Sergio, additional, Intini, Giuseppe, additional, La Rosa, Iuri, additional, Leaci, Paola, additional, Mastrogiovanni, Simone, additional, Muciaccia, Federico, additional, Mitidis, Andonis, additional, Palomba, Cristiano, additional, Piccinni, Ornella J., additional, Singhal, Akshat, additional, Whiting, Bernard F., additional, and Rei, Luca, additional
Published: 2019
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43. Method to search for long duration gravitational wave transients from isolated neutron stars using the generalized frequency-Hough transform

Author: Miller, Andrew, primary, Astone, Pia, additional, D’Antonio, Sabrina, additional, Frasca, Sergio, additional, Intini, Giuseppe, additional, La Rosa, Iuri, additional, Leaci, Paola, additional, Mastrogiovanni, Simone, additional, Muciaccia, Federico, additional, Palomba, Cristiano, additional, Piccinni, Ornella J., additional, Singhal, Akshat, additional, and Whiting, Bernard F., additional
Published: 2018
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44. Method to search for long duration gravitational wave transients from isolated neutron stars using the generalized frequency-Hough transform

Author: UF, Miller, Andrew, Astone, Pia, D’Antonio, Sabrina, Frasca, Sergio, Intini, Giuseppe, La Rosa, Iuri, Leaci, Paola, Mastrogiovanni, Simone, Muciaccia, Federico, Palomba, Cristiano, Piccinni, Ornella J., Singhal, Akshat, Whiting, Bernard F., UF, Miller, Andrew, Astone, Pia, D’Antonio, Sabrina, Frasca, Sergio, Intini, Giuseppe, La Rosa, Iuri, Leaci, Paola, Mastrogiovanni, Simone, Muciaccia, Federico, Palomba, Cristiano, Piccinni, Ornella J., Singhal, Akshat, and Whiting, Bernard F.
Published: 2018

45. Full band all-sky search for periodic gravitational waves in the O1 LIGO data

Author: Abbott, Benjamin P., Abbott, Rich, Abbott, Thomas D., Acernese, Fausto, Ackley, Kendall, Adams, Carl, Adams, Thomas, Addesso, Paolo, Adhikari, Rana X., Adya, Vaishali B., Affeldt, Christoph, Afrough, Mohammad, Agarwal, Bhanu, Agathos, Michalis, Agatsuma, Kazuhiro, Aggarwal, Nancy, Aguiar, Odylio D., Aiello, Lorenzo, Ain, Anirban, Allen, Bruce, Allen, Gabrielle, Allocca, Annalisa, Altin, Paul A., Amato, Alex, Ananyeva, Alena, Anderson, Stuart B., Anderson, Warren G., Angelova, Svetoslava V., Antier, Sarah, Appert, Stephen, Arai, Koji, Araya, Melody C., Areeda, Joseph S., Arnaud, Nicolas, Ascenzi, Stefano, Ashton, Gregory, Ast, M., Aston, Stuart M., Astone, Pia, Atallah, Dany V., Aufmuth, Peter, Aulbert, Carsten, AultONeal, K., Austin, Corey, Avila-Alvarez, A., Babak, Stanislav, Bacon, Philippe, Bader, Maria K.M., Bae, Sangwook, Baker, Paul T., Baldaccini, Francesca, Ballardin, Giulio, Ballmer, Stefan W., Banagiri, Sharan, Barayoga, Juan C., Barclay, Sheena E., Barish, Barry C., Barker, David, Barkett, Kevin, Barone, Fabrizio, Barr, Bryan, Barsotti, Lisa, Barsuglia, Matteo, Barta, Daniel, Bartlett, Jeffrey, Bartos, Imre, Bassiri, Riccardo, Basti, Andrea, Batch, James C., Bawaj, Mateusz, Bayley, Joseph C., Bazzan, Marco, Bécsy, Bence, Beer, Christian, Bejger, Michal, Belahcene, Imene, Bell, Angus S., Berger, Beverly K., Bergmann, Gerald, Bero, John J., Berry, Christopher P.L., Bersanetti, Diego, Bertolini, Alessandro, Betzwieser, Joseph, Bhagwat, Swetha, Bhandare, Rohan, Bilenko, Igor A., Billingsley, Garilynn, Billman, Chris R., Birch, Jeremy, Birney, Ross, Birnholtz, Ofek, Biscans, Sebastien, Biscoveanu, Sylvia, Bisht, Aparna, Bitossi, Massimiliano, Biwer, Christopher, Bizouard, Marieanne A., Blackburn, J.K., Blackman, Jonathan, Blair, Carl D., Blair, David G., Blair, Ryan M., Bloemen, Steven, Bock, Oliver, Bode, Nina, Boer, Michel, Bogaert, Gilles, Bohe, Alejandro, Bondu, Francois, Bonilla, Edgard, Bonnand, Romain, Boom, Boris A., Bork, Rolf, Boschi, Valerio, Bose, Sukanta, Bossie, Ken, Bouffanais, Yann, Bozzi, Antonella, Bradaschia, Carlo, Brady, Patrick R., Branchesi, Marica, Brau, Jim E., Briant, Tristan, Brillet, Alain, Brinkmann, Marc, Brisson, Violette, Brockill, Patrick, Broida, Jacob E., Brooks, Aidan F., Brown, Duncan A., Brown, Daniel D., Brunett, Sharon, Buchanan, Christopher C., Buikema, Aaron, Bulik, Tomasz, Bulten, Henk J., Buonanno, Alessandra, Buskulic, Damir, Buy, Christelle, Byer, Robert L., Cabero, Miriam, Cadonati, Laura, Cagnoli, Giampietro, Cahillane, Craig, Calderón Bustillo, J., Callister, Thomas A., Calloni, Enrico, Camp, Jordan B., Canepa, Maurizio, Canizares, Priscilla, Cannon, Kipp C., Cao, H., Cao, Junwei, Capano, Collin D., Capocasa, Eleonora, Carbognani, Franco, Caride, Santiago, Carney, Matthew F., Casanueva Diaz, J., Casentini, Claudio, Caudill, Sarah, Cavaglià, Marco, Cavalier, Fabien, Cavalieri, Roberto, Cella, Giancarlo, Cepeda, Christian B., Cerdá-Durán, P., Cerretani, Giovanni, Cesarini, 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Peter, Covas, Pep B., Cowan, Erika E., Coward, David M., Cowart, Matthew J., Coyne, Dennis C., Coyne, Robert, Creighton, Jolien D.E., Creighton, Teviet D., Cripe, Jonathan, Crowder, Sgwynne G., Cullen, Torrey J., Cumming, Alan, Cunningham, Liam, Cuoco, Elena, Dal Canton, Tito, Dálya, Gergely, Danilishin, Stefan L., D'Antonio, S., Danzmann, Karsten, Dasgupta, Arnab, Da Silva Costa, C.F., Dattilo, Vincenzo, Dave, Ishant, Davier, Michel, Davis, Derek, Daw, Edward J., Day, Brian, De, Soumi, Debra, D., Degallaix, Jerome, De Laurentis, M., Deléglise, Samuel, Del Pozzo, W., Demos, Nicholas, Denker, Timo, Dent, Thomas, De Pietri, R., Dergachev, Vladimir, De Rosa, R., DeRosa, R.T., De Rossi, C., DeSalvo, R., de Varona, O., Devenson, Jan, Dhurandhar, Sanjeev, Díaz, Mario C., Di Fiore, L., Di Giovanni, M., Di Girolamo, T., Di Lieto, A., Di Pace, S., Di Palma, I., Di Renzo, F., Doctor, Zoheyr, Dolique, Vincent, Donovan, Fred, Dooley, Katherine L., Doravari, Suresh, Dorosh, O., Dorrington, Iain, Douglas, Rebecca, Dovale Álvarez, M., Downes, Thomas P., Drago, Marco, Dreissigacker, Christoph, Driggers, Jenne C., Du, Zhihui, Ducrot, Marine, Dupej, Peter, Dwyer, Sheila E., Edo, Tega B., Edwards, Matthew C., Effler, Anamaria, Eggenstein, H.-B., Ehrens, Phil, Eichholz, Johannes, Eikenberry, Stephen S., Eisenstein, Robert A., Essick, Reed C., Estevez, Dimitri, Etienne, Zachariah B., Etzel, Todd, Evans, Matthew, Evans, Tom M., Factourovich, Maxim, Fafone, Viviana, Fair, Hannah, Fairhurst, Stephen, Fan, Xilong, Farinon, Stefania, Farr, Benjamin, Farr, Will M., Fauchon-Jones, E.J., Favata, Marc, Fays, Maxime, Fee, Campbell, Fehrmann, Henning, Feicht, Jon, Fejer, Martin M., Fernandez-Galiana, A., Ferrante, Isidoro, Ferreira, Elvis C., Ferrini, Federico, Fidecaro, Francesco, Finstad, Daniel, Fiori, Irene, Fiorucci, Donatella, Fishbach, Maya, Fisher, Ryan P., Fitz-Axen, M., Flaminio, Raffaele, Fletcher, Mark, Fong, Heather, Font, J.A., Forsyth, Perry W.F., Forsyth, Steven S., Fournier, J.-D., Frasca, Sergio, Frasconi, Franco, Frei, Zsolt, Freise, Andreas, Frey, Raymond, Frey, Valentin, Fries, Eric M., Fritschel, Peter, Frolov, Valery V., Fulda, Paul, Fyffe, Michael, Gabbard, Hunter, Gadre, Bhooshan U., Gaebel, Sebastian M., Gair, Jonathan R., Gammaitoni, Luca, Ganija, Miftar R., Gaonkar, Sharad G., Garcia-Quiros, C., Garufi, Fabio, Gateley, B., Gaudio, Sergio, Gaur, Gurudatt, Gayathri, V., Gehrels, Neil, Gemme, Gianluca, Genin, Eric, Gennai, Alberto, George, Daniel, George, Jogy, Gergely, Laszlo, Germain, Vincent, Ghonge, Sudarshan, Ghosh, Abhirup, Ghosh, Archisman, Ghosh, Shaon, Giaime, Joe A., Giardina, K.D., Giazotto, Adalberto, Gill, Kiranjyot, Glover, Lamar, Goetz, Evan, Goetz, Ryan, Gomes, Sandra, Goncharov, Boris, González, Gabriela, Gonzalez Castro, J.M., Gopakumar, A., Gorodetsky, Michael L., Gossan, Sarah E., GOSSELIN, Matthieu, Gouaty, Romain, Grado, Aniello, Graef, Christian, Granata, Massimo, Grant, Alastair, Gras, Slawomir, Gray, Corey, Greco, Giuseppe, Green, Anna C., Gretarsson, Elizabeth M., Groot, Paul, Grote, Hartmut, Grunewald, Steffen, Gruning, Pierre, Guidi, Gianluca M., Guo, Xiangyu, Gupta, Anuradha, Gupta, Manojipr K., Gushwa, Kaitlin E., Gustafson, Eric K., Gustafson, R., Halim, O., Hall, Bernard R., Hall, Evan D., Hamilton, Eleanor Z., Hammond, Giles, Haney, Maria, Hanke, Manuela M., Hanks, Jonathan, Hanna, Chad, Hannam, Mark D., Hannuksela, Otto A., Hanson, Joe, Hardwick, Terra, Harms, Jan, Harry, Gregg M., Harry, Ian W., Hart, Martin J., Haster, C.-J., Haughian, Karen, Healy, James, Heidmann, Antoine, Heintze, Matthew C., Heitmann, Henrich, Hello, Patrice, Hemming, Gary, Hendry, Martin, Heng, I.S., Hennig, J., Heptonstall, Alastair W., Heurs, Michele, Hild, Stefan, Hinderer, Tanja, Hoak, Daniel, Hofman, David, Holt, Kathy, Holz, Daniel E., Hopkins, Paul, Horst, Christian, Hough, James, Houston, Ewan A., Howell, Eric J., Hreibi, A., Hu, Yiming M., Huerta, Eliu A., Huet, Dominique, Hughey, Brennan, Husa, Sascha, Huttner, Sabina H., Huynh-Dinh, T., Indik, Nathaniel, Inta, Ra, Intini, Giuseppe, Isa, Hafizah N., Isac, J.-M., Isi, Max, Iyer, Bala R., Izumi, Kiwamu, Jacqmin, Thibaut, Jani, Karan, Jaranowski, Piotr, Jawahar, Sharat, Jiménez-Forteza, F., Johnson, Warren W., Jones, D.I., Jones, Russell, Jonker, Reinier J.G., Ju, L., Junker, Jonas, Kalaghatgi, Chinmay V., Kalogera, Vassiliki, Kamai, Brittany, Kandhasamy, Shivaraj, Kang, Gungwon, Kanner, Jonah B., Kapadia, Shasvath J., Karki, Sudarshan, Karvinen, Kai S., Kasprzack, Marie, Katolik, Michael, Katsavounidis, Erik, Katzman, William, Kaufer, Steffen, Kawabe, Keita, Kéfélian, Fabien, Keitel, David, Kemball, Athol J., Kennedy, Ross, Kent, Christopher, Key, Joey S., Khalili, Farit Y., Khan, I., Khan, Sebastian, Khan, Ziauddin, Khazanov, Efim A., Kijbunchoo, Nutsinee, Kim, Chunglee, Kim, Jeongcho C., Kim, Kyungmin, Kim, Won, Kim, Whansun S., Kim, Y.-M., Kimbrell, Seth J., King, Eleanor J., King, Peter J., Kinley-Hanlon, M., Kirchhoff, Robin, Kissel, Jeffrey S., Kleybolte, Lisa, Klimenko, Sergei, Knowles, Tyler D., Koch, Philip, Koehlenbeck, Sina M., Koley, Soumen, Kondrashov, Veronica, Kontos, Antonios, Korobko, Mikhail, Korth, William Z., Kowalska, Izabela, Kozak, Dan B., Krämer, Christina, Kringel, Volker, Krishnan, Badri, Królak, Andrzej, Kuehn, Gerrit, Kumar, Prayush, Kumar, Rakesh, Kumar, Sumit, Kuo, L., Kutynia, Adam, Kwang, Shawn, Lackey, Benjamin D., Lai, K.H., Landry, Michael, Lang, Ryan N., Lange, Jacob, Lantz, Brian, Lanza, Robert K., Lartaux-Vollard, A., Lasky, Paul D., Laxen, Michael, Lazzarini, Albert, Lazzaro, Claudia, Leaci, Paola, Leavey, Sean, Lee, C.H., Lee, Hyunkyu K., Lee, H.M., Lee, Hyungwon W., Lee, K., Lehmann, Johannes, Lenon, Amber, Leonardi, Matteo, Leroy, Nicolas, Letendre, Nicolas, Levin, Yuri, Li, Tjonnie G.F., Linker, Seth D., Littenberg, Tyson B., Liu, J., Lo, R.K.L., Lockerbie, Nick A., London, Lionel T., Lord, Jaysin E., Lorenzini, Matteo, Loriette, Vincent, Lormand, Marc, Losurdo, Giovanni, Lough, James D., Lovelace, Geoffrey, Lück, Harald, Lumaca, Diana, Lundgren, Andrew P., Lynch, Ryan, Ma, Y., Macas, Ronaldas, Macfoy, Sean, Machenschalk, Bernd, Macinnis, M., Macleod, Duncan M., Magaña Hernandez, I., Magaña-Sandoval, F., Magaña Zertuche, L., Magee, Ryan M., Majorana, Ettore, Maksimovic, Ivan, Man, N., Mandic, Vuk, Mangano, Valentina, Mansell, Georgia L., Manske, Michael, Mantovani, Maddalena, Marchesoni, Fabio, Marion, Frederique, Márka, Szabolcs, Márka, Zsuzsanna, Markakis, Charalampos, Markosyan, Ashot S., Markowitz, Aaron, Maros, E., Marquina, Antonio, Martelli, Filippo, Martellini, Lionel, Martin, Ian W., Martin, Rodica M., Martynov, Denis V., Mason, Ken, Massera, Elena, Masserot, Alain, Massinger, Thomas J., Masso-Reid, M., Mastrogiovanni, Simone, Matas, Andrew, Matichard, Fabrice, Matone, Luca, Mavalvala, Nergis, Mazumder, Nairwita, McCarthy, R., Mcclelland, D.E., Mccormick, S., McCuller, L., McGuire, S.C., Mcintyre, G., Mciver, J., McManus, David J., McNeill, L., McRae, T., McWilliams, S.T., Meacher, Duncan, Meadors, Grant D., Mehmet, Moritz, Meidam, Jeroen, Mejuto-Villa, E., Melatos, Andrew, Mendell, Gregory, Mercer, R.A., Merilh, Edmond L., Merzougui, Mourad, Meshkov, Syd, Messenger, Chris, Messick, Cody, Metzdorff, R., Meyers, Patrick M., Miao, Haixing, Michel, Christophe, Middleton, Hannah, Mikhailov, Eugeniy E., Milano, Leopoldo, Miller, Andrewlawrence L., Miller, Brandon B., Miller, John, Millhouse, Meg, Milovich-Goff, M.C., Minazzoli, Olivier, Minenkov, Yuri, Ming, Jing, Mishra, Chandra, Mitra, Sanjit, Mitrofanov, Valery P., Mitselmakher, Guenakh, Mittleman, Richard, Moffa, Donald, Moggi, Andrea, Mogushi, Kentaro, Mohan, Martin, Mohapatra, S.R.P., Montani, Matteo, Moore, Christopher J., Moraru, Dan, Moreno, Gerardo, Morriss, Sean R., Mours, Benoit, Mow-Lowry, C.M., Mueller, Guido, Muir, Alistair W., Mukherjee, Arunava, Mukherjee, Debnandini, Mukherjee, Soma, Mukund, Nikhil, Mullavey, Adam, Munch, Jesper, Muñiz, Erik A., Muratore, Martina, Murray, Peter G., Napier, Kate, Nardecchia, Ilaria, Naticchioni, Luca, Nayak, Rajesh K., Neilson, Joshua, Nelemans, Gijs, Nelson, Timothy J.N., Nery, Marina, Neunzert, Ansel, Nevin, Lydia, Newport, Jonathan M., Newton, Gavin, Ng, K.Y., Nguyen, Thanh T., Nichols, David, Nielsen, Alex B., Nissanke, Samaya, Nitz, Alex, Noack, Andreas, Nocera, Flavio, Nolting, David, North, Chris, Nuttall, Laura K., Oberling, Jason, O'Dea, G.D., Ogin, Greg H., Oh, John J., Oh, Sanghoon H., Ohme, Frank, Okada, Marcos A., Oliver, Miquel, Oppermann, Patrick, Oram, Richard J., O'Reilly, B., Ormiston, Rich, Ortega, Luis F., O'Shaughnessy, R., Ossokine, Serguei, Ottaway, David J., Overmier, Harry, Owen, Ben J., Pace, Alexander E., Page, Jessica, Page, Michael A., Pai, Archana, Pai, Siddhesh A., Palamos, Jordan R., Palashov, Oleg, Palomba, Cristiano, Pal-Singh, A., Pan, Howard, Pan, Huang-Wei, Pang, Belinda, Pang, P.T.H., Pankow, Chris, Pannarale, Francesco, Pant, Brijesh C., Paoletti, Federico, PAOLI, Andrea, Papa, Maria A., Parida, Abhishek, Parker, William, Pascucci, Daniela, Pasqualetti, Antonio, Passaquieti, Roberto, Passuello, Diego, Patil, M., Patricelli, Barbara, Pearlstone, Brynley L., Pedraza, Mike, Pedurand, Richard, Pekowsky, L., Pele, Arnaud, Penn, Steven, Perez, Carlos J., Perreca, Antonio, Perri, Leah M., Pfeiffer, Harald P., Phelps, Margot, Piccinni, Ornella J., Pichot, Mikhael, Piergiovanni, Francesco, Pierro, Vincenzo, Pillant, Gabriel, Pinard, Laurent, Pinto, Innocenzo M., Pirello, Marc, Pisarski, A., Pitkin, Matthew, Poe, Mark, Poggiani, Rosa, Popolizio, Pasquale, Porter, K., Post, Alexander, Powell, Jade, Prasad, Jayanti, Pratt, James W.W., Pratten, Geraint, Predoi, Valeriu, Prestegard, Tanner, Prijatelj, Mirko, Principe, Maria, Privitera, Stephen, Prodi, Giovanni A., Prokhorov, Leonid G., Puncken, Oliver, Punturo, Michele, Puppo, Paola, Pürrer, Michael, Qi, Hong, Quetschke, Volker, Quintero, Eric A., Quitzow-James, R., Raab, Fred J., Rabeling, David S., Radkins, Hugh, Raffai, Peter, Raja, Sendhil, Rajan, C., Rajbhandari, Binod, Rakhmanov, Malik, Ramirez, Karla E., Ramos-Buades, A., Rapagnani, Piero, Raymond, Vivien, Razzano, Massimiliano, Read, Jocelyn, Regimbau, Tania, Rei, Luca, Reid, Stuart, Reitze, David H., Ren, Wei, Reyes, Steven D., Ricci, Fulvio, Ricker, Paul M., Rieger, Sascha, Riles, Keith, Rizzo, Monica, Robertson, Norna A., Robie, Raymond, Robinet, Florent, Rocchi, Alessio, ROLLAND, Loic, Rollins, Jameson G., Roma, Vincent J., Romano, Rocco, Romel, Chandra L., Romie, Janeen H., Rosińska, Dorota, Ross, Michael P., Rowan, Sheila, Rüdiger, Albrecht, Ruggi, Paolo, Rutins, Guntis, Ryan, Kyle, Sachdev, Surabhi, Sadecki, Travis, Sadeghian, Laleh, Sakellariadou, Mairi, Salconi, Livio, Saleem, Muhammed, Salemi, Francesco, Samajdar, Anuradha, Sammut, Letizia, Sampson, Laura M., Sanchez, Eduardo J., Sanchez, Luis E., Sanchis-Gual, N., Sandberg, Vernon, Sanders, Jaclyn R., Sassolas, Benoit, Saulson, Peter R., Sauter, Orion, Savage, Richard L., Sawadsky, Andreas, Schale, Paul, Scheel, Mark, Scheuer, Jacob, Schmidt, Justus, Schmidt, Patricia, Schnabel, Roman, Schofield, Robert M.S., Schönbeck, Axel, Schreiber, Emil, Schuette, Dirk, Schulte, Bernd W., Schutz, Bernard F., Schwalbe, Sophia G., Scott, Jamie, Scott, Susan M., Seidel, E., Sellers, Danny, Sengupta, Anand S., Sentenac, Daniel, Sequino, Valeria, Sergeev, Alexander, Shaddock, Daniel A., Shaffer, Thomas J., Shah, Ankur A., Shahriar, M.S., Shaner, Morgan B., Shao, Lijing, Shapiro, Brett, Shawhan, Peter, Sheperd, Alec, Shoemaker, David H., Shoemaker, Deirdre M., Siellez, Karelle, Siemens, Xavier, Sieniawska, Magdalena, Sigg, Daniel, Silva, Allan D., Singer, Leo P., Singh, Avneet, Singhal, Akshat, Sintes, Alicia M., Slagmolen, Bram J.J., Smith, Bryan, Smith, Joshua R., Smith, Rory J.E., Somala, Surendranadh, Son, Edwin J., Sonnenberg, Jacob A., Sorazu, Borja, Sorrentino, Fiodor, Souradeep, Tarun, Spencer, Andrew P., Srivastava, Amit K., Staats, 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Abstract: We report on a new all-sky search for periodic gravitational waves in the frequency band 475-2000 Hz and with a frequency time derivative in the range of [-1.0,+0.1]×10-8 Hz/s. Potential signals could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our Galaxy. This search uses the data from Advanced LIGO's first observational run O1. No gravitational-wave signals were observed, and upper limits were placed on their strengths. For completeness, results from the separately published low-frequency search 20-475 Hz are included as well. Our lowest upper limit on worst-case (linearly polarized) strain amplitude h0 is ∼4×10-25 near 170 Hz, while at the high end of our frequency range, we achieve a worst-case upper limit of 1.3×10-24. For a circularly polarized source (most favorable orientation), the smallest upper limit obtained is ∼1.5×10-25. © 2018 American Physical Society.
Published: 2018

46. Search for very long transient GW signals from the post-merger remnant of a binary neutron star merger

Author: UF, Palomba, Cristiano, Miller, Andrew, UF, Palomba, Cristiano, and Miller, Andrew
Published: 2017

47. Novel directed search strategy to detect continuous gravitational waves from neutron stars in low- and high-eccentricity binary systems

Author: Leaci, Paola, primary, Astone, Pia, additional, D’Antonio, Sabrina, additional, Frasca, Sergio, additional, Palomba, Cristiano, additional, Piccinni, Ornella, additional, and Mastrogiovanni, Simone, additional
Published: 2017
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48. Measurement of the optical parameters of the Virgo interferometer

Author: Virgo Collaboration, Acernese, Fausto, Alshourbagy, Mohamed, Amico, Paolo, Aoudia, S., Antonucci, Federica, Astone, P., Avino, Saverio, Babusci, D., Ballardin, G., Barone, Fabrizio, Barsuglia, Matteo, Barsotti, Lisa, Beauville, Fabrice, Bigotta, Stefano, Birindelli, Simona, Bizouard, Marie-Anne, Boccara, Albert-Claude, Bondu, Francois, Bosi, Leone, Braccini, Stefano, Bradaschia, Carlo, Brillet, Alain, Brisson, Violette, Brocco, Laura, Buskulic, Damir, Calloni, Enrico, Campagna, Enrico, Cavalier, Fabien, Carbognani, Franco, Cavalieri, Roberto, Cella, Giancarlo, Cesarini, E., Chassande-Motin, Eric, Christensen, N., Clapson, Andre-Claude, Frederic, Cleva, Corda, Christian, Corsi, A., Cottone, Francesco, Coulon, Jean-Pierre, Cuoco, Elena, Dari, Anna, Datillo, Vicenzo, Davier, Michel, Del Prete, M., Rosa, Rosario, Di Fiore, Luciano, Di Virgilio, Angela, Dujardin, Benedicte, Eleuteri, A., Ferrante, Isidoro, Fidecaro, Francesco, Fiori, Irene, Flaminio, Raffaele, Fourier, Jean Daniel, Frasca, Sergio, Frasconi, Franco, Francois, Olivier, Gammaitoni, Luca, Garufi, F., Genin, E., Gennai, Alberto, Giazotto, Adalberto, Giordano, G., Giordano, Lara, Gouaty, Romain, Grosjean, Daniel, Guidi, Gianluca M., Hebri, Salem, Heitmann, Henrich, Hello, Patrice, Karkar, Sonia, Kreckelbergh, Stephane, La Penna, Paolo, Laval, Mikael, Leroy, Nicolas, Letendre, Nicolas, Lopez, B., Lorenzini, Matteo, Loriette, Vincent, Losurdo, Giovanni, Mackowski, Jean-Marie, Majorana, Ettore, Mantovani, Maddalena, Fabio Garufi, Marion, Frederique, Marque, Julien, Martelli, Filippo, Masserot, Alain, Mazzoni, Massimo, Menzinger, F., Moreau, J., Milano, Leopoldo, Moins, Christophe, Morgado, Nazario, Mours, Benoit, Nary-Man, Catherine, Nocera, Flavio, Pai, A., Palomba, Cristiano, Paoletti, Federico, Pardi, Silvio, Pasqualetti, Antonio, Passaquieti, Roberto, Passuello, Diego, Perniola, B., Piergiovanni, Francesco, Pinard, Laurent, Poggiani, Rosa, Punturo, Michele, Puppo, Paola, Qipiani, K., Rapagnani, Piero, Ricci, Fulvio, Reita, V., Remillieux, Alban, Ricciardi, Iolanda, Ruggi, Paolo, Russo, Guido, Solimeno, Salvatore, Spallicci, Alessandro, Stanga, R., Tarallo, M., Toncelli, Alessandra, Tonelli, Mauro, Tournefier, Edwige, Travasso, Flavio, Tremola, C., Vajente, Gabriele, Verkindt, Didier, Vetrano, Flavia, Vicere, Andrea, Vinet, Jean Yves, Vocca, Helios, Yvert, Michel, Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux ( ARTEMIS ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de la Côte d'Azur, Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Annecy de Physique des Particules ( LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire des matériaux avancés ( LMA ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), VIRGO, BOMBAR, Claudine, Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux (ARTEMIS), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire des matériaux avancés (LMA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon
Subjects: [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], General Relativity and Quantum Cosmology, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::Instrumentation and Methods for Astrophysics, Physics::Optics, Astrophysics::Cosmology and Extragalactic Astrophysics, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], [ PHYS.ASTR.CO ] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::Galaxy Astrophysics, [ SDU.ASTR ] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Abstract: Soumis à Applied Optics; The Virgo interferometer, aimed at detecting gravitational waves, is now in a commissioning phase. Measurements of its optical properties are needed for the understanding of the instrument. The techniques developed for the measurement of the optical parameters of Virgo are presented in this paper. These parameters are compared to the Virgo specifications.
Published: 2007

49. Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform

Author: Astone, Pia, primary, Colla, Alberto, additional, D’Antonio, Sabrina, additional, Frasca, Sergio, additional, and Palomba, Cristiano, additional
Published: 2014
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50. Simulation of a population of gravitational wave-driven neutron stars

Author: Palomba, Cristiano, primary
Published: 2005
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