Author: "Carlo Ungarelli" / Topic: general relativity and quantum cosmology (gr-qc) - Searchworks@Jio Institute Digital Library Search Results

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27 results on '"Carlo Ungarelli"'

1. Search for gravitational-wave bursts in LIGO data from the fourth science run

Author: Pamela J. Russell, Roger K. Route, K. A. Thorne, J. Betzwieser, D. Ugolini, Stefan Hild, D. B. Kozak, David Jones, C. Vorvick, F. Ya. Khalili, Atsushi J. Nishizawa, Erika D'Ambrosio, Peter R. Saulson, V. Kondrashov, Roman Schnabel, R. Abbott, R. DeSalvo, J. E. Brau, Subhasish Mitra, H. Bantilan, Nicolás Yunes, M. A. Barton, Vincenzo Matta, Benno Willke, J. Clark, Pankaj Sarin, D. Meyers, L. Ruet, S. Gossler, D.B. DeBra, P. J. Sutton, K. Y. Franzen, A. L. Stuver, T. Demma, A. M. Rogan, Giuseppe Castaldi, P. Schwinberg, I. Gholami, Albrecht Rüdiger, Alessandra Buonanno, J. A. Sidles, E. E. Doomes, Fabio Postiglione, Martin P McHugh, B. J. J. Slagmolen, C. Messenger, S. Saraf, P. J. Veitch, J. Bogenstahl, L. Ribichini, Roberto Conte, E. Maros, P. Shawhan, W. G. Anderson, E. Innerhofer, Walter Winkler, Harald Lück, P. Charlton, L. Sancho De La Jordana, I. Wilmut, S. C. McGuire, Michael E Zucker, Massimo Tinto, A. Di Credico, L. Matone, R. L. Ward, Laura Cadonati, J. S. Kissel, B. P. Abbott, C. Aulbert, Ping Koy Lam, Shantanu Desai, Kip S. Thorne, Keisuke Goda, I. A. Bilenko, V. Dergachev, David J. Ottaway, Roger Jones, V. Leonhardt, J. C. Dumas, E. Chin, K. Rawlins, M. Guenther, M. Degree, A. Moylan, J. H. Romie, A. Sibley, S. Vass, Albert Lazzarini, K. Bayer, Erik Katsavounidis, Susan M. Scott, Teviet Creighton, M. J. Lubinski, D. Jackrel, Chad Hanna, F. J. Raab, B. Bland, K. Kawabe, Marco Aurelio Diaz, S. M. Aston, W. Kells, M. R. Smith, S. Wen, D. Busby, X. Siemens, V. P. Mitrofanov, John G. Dwyer, R. Gustafson, B. Rivera, Pablo Barriga, Daniel C. Woods, Vladimir B. Braginsky, H. Vahlbruch, K. Riles, M. A. Arain, T. Etzel, M. Mageswaran, S. Giampanis, John Worden, Boris Hage, S. H. Huttner, Gregory M. Harry, M. C. Araya, M. Lei, E. Espinoza, M. Weinert, David H. Shoemaker, C. Torres, A. Rodriguez, C. Barker, Andreas Freise, Vincenzo Pierro, K. Kokeyama, P. G. Murray, Holger J. Pletsch, C. Wilkinson, C. Zhao, Alicia M. Sintes, M. Ramsunder, E. Hirose, Juri Agresti, A. Dietz, Badri Krishnan, E. Chalkey, Matthew Pitkin, M. Varvella, R. Wooley, J. Heefner, R. Grosso, Stephen Fairhurst, J. Zweizig, Antony C. Searle, R. P. Croce, D. J. Hosken, C. M. Mow-Lowry, J. G. Rollins, Yousuke Itoh, Marco G. Tarallo, I. W. Martin, B. Johnson, J. H. Hough, D. Kasprzyk, Frank Seifert, D. Hoyland, Virginio Sannibale, David E. McClelland, M. Samidi, T. Hayler, Peter Fritschel, J. Dickson, C. I. Torrie, Jan Harms, A. S. Sengupta, A. J. Weinstein, W. Wu, P. T. Beyersdorf, V. Boschi, K. C. Cannon, J. Slutsky, C. Van Den Broeck, Kris Ryan, D. Webber, J. Greenhalgh, S. Wise, I. Yakushin, Helge Müller-Ebhardt, Michele Vallisneri, S. E. Whitcomb, S. Grunewald, K. Mailand, Maurizio Longo, Krzysztof Belczynski, Douglas R. Cook, R. Mittleman, Ravi Kumar Kopparapu, Soumya D. Mohanty, Rana X. Adhikari, C. Gray, M. Ito, A. M. Cruise, Ik Siong Heng, R.L. Coldwell, Evan Goetz, Gareth Jones, Nelson Christensen, N. Zotov, P. Cochrane, Emma L. Robinson, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, J. R. Smith, R. Bork, G. Traylor, Kentaro Somiya, Michele Zanolin, P. Kwee, A. Grant, B. Machenschalk, C. A. Cantley, K. Mason, Eric Howell, T. Nash, Michael Landry, Sanjeev Dhurandhar, Kenji Numata, L. Zhang, J. Zhang, Vuk Mandic, Thomas Corbitt, S. Sakata, Miquel Trias, Richard O'Shaughnessy, B. Barr, P. Patel, Malik Rakhmanov, S. B. Anderson, Kenneth G. Libbrecht, C. Robinson, Benjamin William Allen, S. Ray-Majumder, Karsten Danzmann, Kirk McKenzie, S. Meshkov, L. Williams, R. L. Savage, H. Ward, Peter King, A. Heptonstall, R. Riesen, Slawomir Gras, Roland Schilling, Stefano Marano, G. Billingsley, C. N. Colacino, M. Malec, H. Rehbein, K. Watts, Oliver Burmeister, Vincenzo Galdi, Francesco Chiadini, D. M. Whitbeck, D. R. Ingram, Phil Willems, Morag M. Casey, M. Heurs, Yi Chen, N. Fotopoulos, R. Rahkola, A. Franzen, A. E. Villar, Alberto Vecchio, Graham Woan, David B. Tanner, D. M. Strom, A. C. Melissinos, V. V. Frolov, Robert L. Byer, V. Parameshwaraiah, Nergis Mavalvala, Stuart Reid, Jerome Degallaix, H. Yamamoto, John Veitch, R. J. Dupuis, Jong H. Chow, B. C. Barish, David Crooks, T. T. Fricke, Lisa M. Goggin, D. Chin, Supriyo Sinha, Stanislav Babak, Bernard F. Schutz, Li Ju, Sascha Schediwy, M. MacInnis, R. S. Amin, A. Cumming, Eugeniy E. Mikhailov, J. Hanson, Duncan A. Brown, Guido Mueller, A. M. Gretarsson, M. Sung, E. Messaritaki, G. Mendell, Sheila Rowan, A. Brooks, P. Ehrens, H. zur Mühlen, N. A. Lockerbie, B. Lantz, Carlos Cepeda, Robert J. McCarthy, J. A. Giaime, K. Wette, Timothy Evans, Karel E. Urbanek, Gianpietro Cagnoli, D. Sigg, S. W. Ballmer, R. M. S. Schofield, G. Moreno, M. Fyffe, Gabriela Gonzalez, Benjamin J. Owen, Shuichi Sato, P. Savov, James Whelan, P. Ajith, M. Pedraza, J. Myers, E. Myers, Christopher Wipf, K. V. Tokmakov, Shourov Chatterji, D. Fazi, S. J. Waldman, Suvadeep Bose, Martin Hewitson, Junwei Cao, Maria Alessandra Papa, Malcolm B. Gray, Joseph D. Romano, Jared Markowitz, Vincenzo Fiumara, Fumiko Kawazoe, Kasem Mossavi, Kent Blackburn, J. Thacker, Soma Mukherjee, Drew Keppel, Zewu Yan, R. Taylor, N. A. Robertson, G. Diederichs, Helena Armandula, Andre Thüring, Ke-Xun Sun, D. Hammer, Michael C. B. Ashley, Peter Kalmus, Carlo Ungarelli, Jason S. Pelc, I. Leonor, John K. Cannizzo, K. D. Giardina, J. W C McNabb, Jordan Camp, T. Meier, J. Dalrymple, G. Newton, B. Lee, Matthew Evans, L. Cardenas, M. V. Plissi, Hartmut Grote, S. Klimenko, D. Barker, P. E. Lindquist, Peter Aufmuth, M. Lormand, S. Roddy, B. Bhawal, J. N. Marx, A. Bullington, Rahul Biswas, Lee Samuel Finn, L. Bogue, Sean T. McWilliams, J. Garofoli, Shuhei Yoshida, B. F. Whiting, H. Overmier, L. Wallace, R. Frey, D. Sellers, Simon Chelkowski, A. G. Wiseman, D. C. Coyne, D. Hoak, Patrick Brady, T. Z. Summerscales, Hirotaka Takahashi, Gavin Davies, B. Sears, Guenakh Mitselmakher, Vicky Kalogera, A. Bunkowski, Jonathan C. Leiner, S. Márka, V. Re, Yaohui Fan, Kenneth A. Strain, A. Weidner, Innocenzo M. Pinto, Thomas Cokelaer, Rainer Weiss, R. W. P. Drever, Seiji Kawamura, Reinhard Prix, Elizabeth Harstad, W. W. Johnson, Osamu Miyakawa, David H. Reitze, B. O'Reilly, N. Rainer, David Blair, Yi Pan, Jolien D. E. Creighton, Lindy Blackburn, Chunglee Kim, V. Sandberg, D. S. Rabeling, R. A. Mercer, Jesper Munch, A. Ivanov, H. Radkins, Damien Mudge, S. P. Vyachanin, M. Brinkmann, W. Tyler, David Coward, S. Penn, LSC Collaboration, The, Castaldi, G., Galdi, V., Pierro, V., and Pinto, I. M.
Subjects: Physics, Physics and Astronomy (miscellaneous), Gravitational wave, Monte Carlo method, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), LIGO, General Relativity and Quantum Cosmology, Black hole, QC350, Amplitude, Binary black hole, NAUTILUS, EXPLORER, Waveform, Noise (radio), QC
Abstract: The fourth science run of the LIGO and GEO 600 gravitational-wave detectors, carried out in early 2005, collected data with significantly lower noise than previous science runs. We report on a search for short-duration gravitational-wave bursts with arbitrary waveform in the 64-1600 Hz frequency range appearing in all three LIGO interferometers. Signal consistency tests, data quality cuts, and auxiliary-channel vetoes are applied to reduce the rate of spurious triggers. No gravitational-wave signals are detected in 15.5 days of live observation time; we set a frequentist upper limit of 0.15 per day (at 90% confidence level) on the rate of bursts with large enough amplitudes to be detected reliably. The amplitude sensitivity of the search, characterized using Monte Carlo simulations, is several times better than that of previous searches. We also provide rough estimates of the distances at which representative supernova and binary black hole merger signals could be detected with 50% efficiency by this analysis., Comment: Corrected amplitude sensitivities (7% change on average); 30 pages, submitted to Classical and Quantum Gravity
Published: 2007
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2. Gravitational waves, inflation and the cosmic microwave background: towards testing the slow-roll paradigm

Author: Carlo Ungarelli, Pier Stefano Corasaniti, R. A. Mercer, Alberto Vecchio, Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)
Subjects: [PHYS]Physics [physics], Physics, Inflation (cosmology), COSMIC cancer database, Physics and Astronomy (miscellaneous), Slow roll, 010308 nuclear & particles physics, Gravitational wave, Astrophysics (astro-ph), Cosmic microwave background, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, Interferometry, Big Bang Observer, 0103 physical sciences, Sensitivity (control systems), 010306 general physics
Abstract: One of the fundamental and yet untested predictions of inflationary models is the generation of a very weak cosmic background of gravitational radiation. We investigate the sensitivity required for a space-based gravitational wave laser interferometer with peak sensitivity at $\sim 1$ Hz to observe such signal as a function of the model parameters and compare it with indirect limits that can be set with data from present and future cosmic microwave background missions. We concentrate on signals predicted by slow-roll single field inflationary models and instrumental configurations such as those proposed for the LISA follow-on mission: Big Bang Observer., Comment: 10 pages, 2 figures, uses iopart.cls. Typos corrected, references added, accepted for publication in Classical and Quantum Gravity
Published: 2005
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3. Search for gravitational waves from binary inspirals in S3 and S4 LIGO data

Author: S. Márka, Kenneth A. Strain, B. O'Reilly, Yi Pan, B. Lee, D. Hoak, J. N. Marx, M. Fyffe, M. V. Plissi, Hartmut Grote, P. E. Lindquist, B. Bhawal, R. Bork, Benno Willke, J. Clark, L. Ruet, Soumya D. Mohanty, N. Zotov, Jordan Camp, Alessandra Buonanno, Rana X. Adhikari, J. Zhang, S. H. Huttner, V. Leonhardt, David Jones, Ravi Kumar Kopparapu, J. Bogenstahl, Michael E Zucker, Nicolás Yunes, E. Innerhofer, S. Giampanis, A. Dietz, K. Mason, A. J. Weinstein, I. Gholami, W. Wu, P. T. Beyersdorf, B. Machenschalk, V. Boschi, S. Ray-Majumder, T. Meier, J. Dalrymple, G. Newton, A. M. Cruise, R.L. Coldwell, C. N. Colacino, P. J. Sutton, Chunnong Zhao, David H. Shoemaker, P. Cochrane, M. Degree, N. A. Robertson, S. Chelkowski, R. Grosso, L. Zhang, Peter R. Saulson, O. Burmeister, C. Vorvick, Yi Chen, Roman Schnabel, Vuk Mandic, R. P. Croce, J. Heefner, M. Ito, Subhasish Mitra, D. Hammer, Matthew Evans, F. Seifert, A. Grant, S. Sakata, R. L. Ward, Michael C. B. Ashley, E. Chin, Walter Winkler, Harald Lück, B. Johnson, L. Cardenas, D. Kasprzyk, F. Ya. Khalili, Atsushi J. Nishizawa, A. Weidner, D. Meyers, C. Gray, Miquel Trias, P. Schwinberg, S. C. McGuire, M. Samidi, B. Lantz, Michele Vallisneri, Ik Siong Heng, Richard O'Shaughnessy, B. Barr, A. L. Stuver, Giuseppe Castaldi, P. Patel, Malik Rakhmanov, J. Worden, L. Williams, A. Rüdiger, Emma L. Robinson, A. Ivanov, Peter Kalmus, Marco Aurelio Diaz, J. H. Romie, K. Bayer, H. Zur Mühlen, W. G. Anderson, S. Grunewald, A. M. Rogan, Carlo Ungarelli, H. Yamamoto, N. Fotopoulos, R. Rahkola, Vincenzo Matta, H. Radkins, Damien Mudge, Keisuke Goda, S. Saraf, Gavin Davies, R. Riesen, S. P. Vyachanin, F. J. Raab, P. Shawhan, Andreas Freise, Vincenzo Pierro, Stefano Marano, S. Penn, Pamela J. Russell, Roberto Conte, C. Aulbert, Erik Katsavounidis, B. P. Abbott, Roland Schilling, P. Charlton, M. Brinkmann, W. Tyler, B. Sears, Roger K. Route, Vicky Kalogera, C. A. Cantley, Matthew Pitkin, C. Messenger, M. Mageswaran, A. Bullington, Rahul Biswas, K. A. Thorne, C. Robinson, M. Lormand, L. Matone, S. Wen, D. Jackrel, John G. Dwyer, A. Di Credico, L. Bogue, Sean T. McWilliams, K. S. Ganezer, I. Yakushin, K. Watts, David Coward, Laura Cadonati, K. Kawabe, D. Ugolini, Hirotaka Takahashi, M. Varvella, R. Wooley, Benjamin William Allen, Stefan Hild, V. Parameshwaraiah, Vladimir B. Braginsky, Karsten Danzmann, W. Kells, S. Dhurandhar, L. Ribichini, H. Vahlbruch, K. Riles, E. Espinoza, R. J. Dupuis, R. Gustafson, T. Hayler, S. Vass, H. Bantilan, Yaohui Fan, N. A. Lockerbie, M. Weinert, D. Chin, Supriyo Sinha, A. Sibley, E. Myers, V. Fiumara, Kentaro Somiya, I. A. Bilenko, V. Dergachev, David J. Ottaway, Stanislav Babak, J. C. Dumas, Richard J. Abbott, A. E. Villar, A. Moylan, G. T. Jones, Teviet Creighton, Ping Koy Lam, M. A. Barton, Badri Krishnan, Slawomir Gras, T. Evans, Yousuke Itoh, Duncan A. Brown, R. Desalvo, Chad Hanna, X. Siemens, E. Chalkey, Antony C. Searle, C. M. Mow-Lowry, Erika D'Ambrosio, D. Busby, Kenji Numata, C. Wilkinson, P. Savov, H. Overmier, James Whelan, Guenakh Mitselmakher, Nergis Mavalvala, Jerome Degallaix, K. Kokeyama, John K. Cannizzo, Jonathan C. Leiner, V. Re, P. Ajith, B. C. Barish, V. Kondrashov, B. F. Whiting, D. Coyne, A. M. Gretarsson, K. Y. Franzen, D. Hoyland, J. Zweizig, F. Nocera, Rainer Weiss, D. J. Hosken, Karel E. Urbanek, C. Parameswariah, E. E. Doomes, J. G. Rollins, M. A. Arain, Gregory M. Harry, P. G. Murray, D. Cook, J. A. Sidles, Fabio Postiglione, C. Van Den Broeck, I. Wilmut, S. E. Whitcomb, S. Gossler, Sandra E. Wiley, Gabriela Gonzalez, M. Lei, J. A. Giaime, T. Regimbau, P. Kwee, J. H. Hough, Lindy Blackburn, P. Ehrens, F. Kawazoe, J. Garofoli, J. S. Kissel, M. Malec, L. Sancho De La Jordana, Shantanu Desai, Kip S. Thorne, Chunglee Kim, V. Sandberg, D. R. Ingram, Phil Willems, J. Hanson, R. W.P. Drever, D. Sellers, M. Guenther, P. J. Veitch, D. S. Rabeling, Michele Zanolin, Roger Jones, I. W. Martin, Marco G. Tarallo, D. M. Strom, David Blair, Virginio Sannibale, David E. McClelland, J. Slutsky, D. Webber, R. A. Mercer, K. D. Giardina, Patrick Brady, V. P. Mitrofanov, M. C. Araya, Lisa M. Goggin, Innocenzo M. Pinto, D. Debra, Maurizio Longo, Boris Hage, S. M. Aston, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, J. R. Smith, S. Klimenko, T. Nash, B. Rivera, Pablo Barriga, S. Wise, T. Demma, Thomas Cokelaer, Krzysztof Belczynski, R. Mittleman, Nelson Christensen, A. Sazonov, S. M. Scott, Seiji Kawamura, Jesper Munch, B. Bland, Reinhard Prix, Elizabeth Harstad, Daniel C. Woods, J. W C McNabb, Malcolm B. Gray, Peter Fritschel, K. C. Cannon, M. Lubinski, A. Heptonstall, S. Mukherjee, Jong H. Chow, H. Ward, K. Mailand, Osamu Miyakawa, David H. Reitze, David Crooks, L. Wallace, S. Meshkov, R. Frey, H. J. Pletsch, G. Traylor, D. Kozak, Thomas Corbitt, J. Thacker, Kenneth G. Libbrecht, Kevin M. Carter, Drew Keppel, Zewu Yan, P. J. King, I. Leonor, A. G. Wiseman, H. Rehbein, Pankaj Sarin, S. B. Anderson, Stephen Fairhurst, John Veitch, David B. Tanner, G. Mendell, Sascha Schediwy, William E. Butler, M. Sung, V. V. Frolov, M. MacInnis, Martin P McHugh, B. J. J. Slagmolen, M. Pedraza, M. H. P. M. van Putten, Maria Alessandra Papa, Carlos Cepeda, Kent Blackburn, Shuichi Sato, D. Barker, K. Rawlins, M. Hewitson, T. Etzel, S. Roddy, Joseph D. Romano, Jared Markowitz, Kasem Mossavi, A. M. Sintes, P. Aufmuth, Lee Samuel Finn, Kirk McKenzie, C. Torres, A. Rodriguez, C. Barker, Kevin M. Ryan, Morag M. Casey, M. Heurs, J. Betzwieser, Francesco Chiadini, A. Franzen, A. Thüring, A. C. Melissinos, J. E. Brau, T. Z. Summerscales, R. Taylor, A. Brooks, G. Diederichs, K. Wette, Helena Armandula, D. Sigg, W. W. Johnson, N. Rainer, S. W. Ballmer, E. Hirose, Juri Agresti, H. Müller-Ebhardt, Eric Howell, Michael Landry, R. McCarthy, G. Billingsley, J. D. E. Creighton, R. Amin, R. M. S. Schofield, Benjamin J. Owen, Christopher Wipf, K. V. Tokmakov, Junwei Cao, Sanichiro Yoshida, Graham Woan, Robert L. Byer, E. Maros, Stuart Reid, Ke Sun, Bernard F. Schutz, Li Ju, Guido Mueller, A. Cumming, E. Messaritaki, Sheila Rowan, J. Dickson, C. I. Torrie, Jan Harms, A. S. Sengupta, J. Greenhalgh, G. Moreno, Evan Goetz, Vincenzo Galdi, R. L. Savage, D. M. Whitbeck, T. T. Fricke, Eugeniy E. Mikhailov, A. Bunkowski, M. R. Smith, G. H. Sanders, Alberto Vecchio, A. Lazzarini, Gianpietro Cagnoli, J. Myers, Shourov Chatterji, D. Fazi, S. J. Waldman, Suvadeep Bose, and The LIGO Scientific Collaboration
Subjects: Nuclear and High Energy Physics, Population, FOS: Physical sciences, Primordial black hole, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, laser-interferometer, QC350, Binary black hole, Binary star, Astrophysics::Solar and Stellar Astrophysics, ddc:530, education, QC, QB, Physics, LASER-INTERFEROMETER, education.field_of_study, Gravitational wave, Astronomy, sensitivity, LIGO, Black hole, radiation, Neutron star, RADIATION, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Astrophysics::Earth and Planetary Astrophysics, SENSITIVITY
Abstract: We report on a search for gravitational waves from the coalescence of compact binaries during the third and fourth LIGO science runs. The search focused on gravitational waves generated during the inspiral phase of the binary evolution. In our analysis, we considered three categories of compact binary systems, ordered by mass: (i) primordial black hole binaries with masses in the range 0.35 M(sun) < m1, m2 < 1.0 M(sun), (ii) binary neutron stars with masses in the range 1.0 M(sun) < m1, m2 < 3.0 M(sun), and (iii) binary black holes with masses in the range 3.0 M(sun)< m1, m2 < m_(max) with the additional constraint m1+ m2 < m_(max), where m_(max) was set to 40.0 M(sun) and 80.0 M(sun) in the third and fourth science runs, respectively. Although the detectors could probe to distances as far as tens of Mpc, no gravitational-wave signals were identified in the 1364 hours of data we analyzed. Assuming a binary population with a Gaussian distribution around 0.75-0.75 M(sun), 1.4-1.4 M(sun), and 5.0-5.0 M(sun), we derived 90%-confidence upper limit rates of 4.9 yr^(-1) L10^(-1) for primordial black hole binaries, 1.2 yr^(-1) L10^(-1) for binary neutron stars, and 0.5 yr^(-1) L10^(-1) for stellar mass binary black holes, where L10 is 10^(10) times the blue light luminosity of the Sun., 12 pages, 11 figures
Published: 2008

4. All-sky search for periodic gravitational waves in LIGO S4 data

Author: D. Hammer, F. Seifert, Michael C. B. Ashley, Peter Kalmus, Carlo Ungarelli, I. Leonor, H. Rehbein, K. D. Giardina, S. B. Anderson, David B. Tanner, E. Hirose, M. Sung, Juri Agresti, J. W C McNabb, M. Pedraza, Maria Alessandra Papa, Kent Blackburn, Benno Willke, J. Clark, H. Müller-Ebhardt, H. Ward, A. L. Stuver, Eric Howell, Michael Landry, E. Chalkley, L. Ruet, Alessandra Buonanno, G. Billingsley, John Veitch, Sanichiro Yoshida, Graham Woan, Rana X. Adhikari, Sascha Schediwy, B. Machenschalk, Soumya D. Mohanty, Robert L. Byer, Stuart Reid, P. Shawhan, K. Rawlins, P. Charlton, Ke Sun, Bernard F. Schutz, M. MacInnis, R. S. Amin, Andreas Freise, Vincenzo Pierro, A. Di Credico, N. Zotov, E. Innerhofer, S. Giampanis, Matthew Pitkin, K. Mason, M. Varvella, R. Wooley, Sanjeev Dhurandhar, S. Ray-Majumder, Li Ju, I. A. Bilenko, J. Hanson, V. Dergachev, Guido Mueller, David J. Ottaway, T. Hayler, C. N. Colacino, Vincenzo Galdi, Yi Chen, B. Lantz, R. P. Croce, R. L. Ward, M. Degree, J. H. Romie, K. Bayer, F. J. Raab, R. M. S. Schofield, Benjamin J. Owen, Badri Krishnan, Antony C. Searle, R. Gustafson, C. Torres, A. Rodriguez, C. Barker, I. Wilmut, F. Kawazoe, J. Garofoli, Christopher Wipf, C. M. Mow-Lowry, J. Cannizzo, A. Bunkowski, D. Hoyland, Pankaj Sarin, J. S. Kissel, David Jones, C. A. Cantley, K. V. Tokmakov, Martin Hewitson, Junwei Cao, C. Robinson, Benjamin William Allen, Karsten Danzmann, J. Zweizig, Roger Jones, C. Van Den Broeck, J. Bogenstahl, Michael E Zucker, Stefano Marano, Seiji Kawamura, Reinhard Prix, Elizabeth Harstad, Peter R. Saulson, K. Kawabe, S. M. Aston, Slawomir Gras, B. Rivera, Pablo Barriga, S. H. Huttner, M. Mageswaran, Jong H. Chow, David Crooks, Osamu Miyakawa, David H. Reitze, Erika D'Ambrosio, J. Dickson, C. I. Torrie, Jan Harms, A. S. Sengupta, V. V. Frolov, Martin P McHugh, V. Parameshwaraiah, A. Dietz, B. J. J. Slagmolen, J. E. Brau, P. G. Murray, E. Chin, J. Greenhalgh, J. H. Hough, M. A. Arain, Evan Goetz, S. Sakata, Miquel Trias, Gregory M. Harry, D. Chin, Supriyo Sinha, Stanislav Babak, E. Maros, R. Taylor, M. Lei, Duncan A. Brown, Douglas R. Cook, B. F. Whiting, Shantanu Desai, R. L. McCarthy, Kip S. Thorne, Marco Aurelio Diaz, G. Diederichs, Michele Zanolin, Richard O'Shaughnessy, B. Barr, P. Patel, Malik Rakhmanov, P. Kwee, V. Kalogera, H. Overmier, N. Fotopoulos, S. Meshkov, A. Cumming, R. Rahkola, J. Worden, L. Williams, A. Rüdiger, D. Sellers, V. P. Mitrofanov, I. W. Martin, Helena Armandula, G. Mendell, M. C. Araya, M. Guenther, Virginio Sannibale, David E. McClelland, Kirk McKenzie, B. Lee, N. Rainer, D. Hoak, R. Riesen, Boris Hage, A. M. Gretarsson, Karel E. Urbanek, Morag M. Casey, M. Heurs, Roland Schilling, Patrick Brady, M. V. Plissi, M. Fyffe, Gabriela Gonzalez, Sheila Rowan, M. Ito, F. Ya. Khalili, Atsushi J. Nishizawa, Kevin M. Ryan, A. Thüring, K. Mailand, Malcolm B. Gray, Gavin Davies, Hartmut Grote, A. C. Melissinos, B. Sears, Gianpietro Cagnoli, Maurizio Longo, T. Z. Summerscales, T. Etzel, J. Betzwieser, Richard J. Abbott, Krzysztof Belczynski, P. E. Lindquist, R. Mittleman, Francesco Chiadini, A. Franzen, A. M. Rogan, A. Brooks, Marco G. Tarallo, P. Ehrens, J. N. Marx, R. J. Dupuis, J. Slutsky, Yaohui Fan, Nelson Christensen, D. Webber, B. Bland, Carlos Cepeda, J. Thacker, Soma Mukherjee, Drew Keppel, J. C. Dumas, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, J. R. Smith, B. Bhawal, S. Saraf, Roberto Conte, C. Aulbert, L. Matone, Zewu Yan, T. Nash, K. Wette, Timothy Evans, Albert Lazzarini, Shuichi Sato, J. Myers, D. Sigg, Shourov Chatterji, H. Yamamoto, Joseph D. Romano, Jared Markowitz, R. Bork, L. Wallace, Kasem Mossavi, S. W. Ballmer, A. Sibley, G. Moreno, K. Kokeyama, R. Frey, D. Fazi, S. J. Waldman, Suvadeep Bose, N. A. Lockerbie, P. J. King, D. J. Hosken, A. G. Wiseman, J. G. Rollins, Jolien D. E. Creighton, Chonghoon Kim, Lindy Blackburn, D. C. Coyne, P. Savov, James Whelan, P. Ajith, L. Zhang, V. Sandberg, D. S. Rabeling, M. R. Smith, Hirotaka Takahashi, S. Márka, Ravi Kumar Kopparapu, R. A. Mercer, Guenakh Mitselmakher, Stephen Fairhurst, Kenneth A. Strain, Vincenzo Matta, A. M. Cruise, Jesper Munch, B. O'Reilly, Innocenzo M. Pinto, Vuk Mandic, D. M. Strom, C. Messenger, A. Ivanov, H. Radkins, Damien Mudge, S. P. Vyachanin, M. Brinkmann, W. Tyler, J. A. Giaime, David Coward, Thomas Cokelaer, D. Barker, S. Roddy, I. Yakushin, S. E. Whitcomb, S. Gossler, A. M. Sintes, Alberto Vecchio, P. Aufmuth, Lee Samuel Finn, Ping Koy Lam, V. Leonhardt, A. J. Weinstein, I. Gholami, W. Wu, P. T. Beyersdorf, V. Boschi, R.L. Coldwell, Giuseppe Castaldi, A. Grant, S. Chelkowski, D. B. Kozak, C. Vorvick, Roman Schnabel, A. Weidner, D. Meyers, P. Schwinberg, K. Watts, H. Zur Mühlen, W. G. Anderson, B. P. Abbott, S. Vass, Jian Zhang, W. Kells, D. Busby, Y. Pan, Subhasish Mitra, A. E. Villar, S. Wen, S. Wise, S. Grunewald, Kenneth G. Libbrecht, R. L. Savage, D. M. Whitbeck, Keisuke Goda, T. T. Fricke, Eugeniy E. Mikhailov, Nergis Mavalvala, Jerome Degallaix, Erik Katsavounidis, Laura Cadonati, B. C. Barish, V. Kondrashov, A. Moylan, Susan M. Scott, Teviet Creighton, Chunnong Zhao, Chad Hanna, M. J. Lubinski, R. DeSalvo, X. Siemens, C. Wilkinson, D. Jackrel, John G. Dwyer, E. E. Doomes, David H. Shoemaker, P. Cochrane, M. Ramsunder, Vladimir B. Braginsky, H. Vahlbruch, T. Demma, L. Sancho De La Jordana, K. Riles, Peter Fritschel, K. C. Cannon, E. Espinoza, M. Weinert, H. J. Pletsch, G. Traylor, Thomas Corbitt, O. Burmeister, A. Heptonstall, M. Malec, D. R. Ingram, Phil Willems, Daniel C. Woods, Yousuke Itoh, J. Heefner, R. Grosso, D. Ugolini, Lisa M. Goggin, M. Lormand, A. Bullington, Rahul Biswas, B. Johnson, D. Kasprzyk, L. Bogue, Sean T. McWilliams, Michele Vallisneri, Ik Siong Heng, Emma L. Robinson, M. Samidi, L. Ribichini, C. Gray, E. Myers, V. Fiumara, Jonathan C. Leiner, V. Re, Kentaro Somiya, Kenji Numata, Rainer Weiss, R. W. P. Drever, W. W. Johnson, David Blair, Jordan Camp, H. Bantilan, M. A. Barton, Walter Winkler, T. Meier, J. Dalrymple, D.B. DeBra, K. Y. Franzen, G. Newton, Fabio Postiglione, Harald Lück, S. C. McGuire, P. J. Veitch, Matthew Evans, L. Cardenas, S. Klimenko, Nicolás Yunes, P. J. Sutton, S. Penn, Pamela J. Russell, Roger K. Route, K. A. Thorne, Stefan Hild, G. T. Jones, N. A. Robertson, LSC Collaboration, The, Castaldi, G., Galdi, V., Pierro, V., and Pinto, I. M.
Subjects: Nuclear and High Energy Physics, Population, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, Noise (electronics), General Relativity and Quantum Cosmology, Particle detector, QC350, Signal-to-noise ratio, 0103 physical sciences, ddc:530, 010306 general physics, education, QC, QB, Physics, education.field_of_study, 010308 nuclear & particles physics, Gravitational wave, Astrophysics (astro-ph), LIGO, Computational physics, Neutron star, StackSlide, Amplitude, Graviational waves, LIGO S4, PowerFlux, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Hough
Abstract: We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1000 Hz and with the frequency's time derivative in the range -1.0E-8 Hz/s to zero. Data from the fourth LIGO science run (S4) have been used in this search. Three different semi-coherent methods of transforming and summing strain power from Short Fourier Transforms (SFTs) of the calibrated data have been used. The first, known as "StackSlide", averages normalized power from each SFT. A "weighted Hough" scheme is also developed and used, and which also allows for a multi-interferometer search. The third method, known as "PowerFlux", is a variant of the StackSlide method in which the power is weighted before summing. In both the weighted Hough and PowerFlux methods, the weights are chosen according to the noise and detector antenna-pattern to maximize the signal-to-noise ratio. The respective advantages and disadvantages of these methods are discussed. Observing no evidence of periodic gravitational radiation, we report upper limits; we interpret these as limits on this radiation from isolated rotating neutron stars. The best population-based upper limit with 95% confidence on the gravitational-wave strain amplitude, found for simulated sources distributed isotropically across the sky and with isotropically distributed spin-axes, is 4.28E-24 (near 140 Hz). Strict upper limits are also obtained for small patches on the sky for best-case and worst-case inclinations of the spin axes., Comment: 39 pages, 41 figures An error was found in the computation of the C parameter defined in equation 44 which led to its overestimate by 2^(1/4). The correct values for the multi-interferometer, H1 and L1 analyses are 9.2, 9.7, and 9.3, respectively. Figure 32 has been updated accordingly. None of the upper limits presented in the paper were affected
Published: 2008

5. Searches for periodic gravitational waves from unknown isolated sources and Scorpius X-1: Results from the second LIGO science run

Author: T. Demma, H. Ward, Rana X. Adhikari, Peter Fritschel, B. F. Whiting, L. Wallace, B. Machenschalk, J. Zhang, J. S. Kissell, S. Chelkowski, D. B. Kozak, A. Weidner, S. Nagano, D. M. Whitbeck, K. C. Cannon, D. Meyers, P. Schwinberg, D. Sigg, G. Moreno, T. T. Fricke, Eugeniy E. Mikhailov, H. Zur Mühlen, W. G. Anderson, D. Barker, John Veitch, B. P. Abbott, J. Betzwieser, Sascha Schediwy, M. Coles, M. Guenther, S. Mukherjee, S. Roddy, H. J. Pletsch, Thomas Corbitt, M. MacInnis, Francesco Chiadini, A. Franzen, D. Busby, M. A. Arain, Gerhard Heinzel, Benno Willke, J. Clark, J. Logan, L. Ruet, Akiteru Takamori, A. M. Rogan, G. Mitselmakher, R. S. Amin, Andreas Freise, N. Fotopoulos, R. Rahkola, Gregory M. Harry, M. C. Díaz, A. Libson, Matthew Pitkin, Malcolm B. Gray, Patrick Brady, M. R. Smith, R. Taylor, J. G. Rollins, G. Mendell, M. Varvella, R. Wooley, V. Sannibale, P. Aufmuth, Lee Samuel Finn, S. Sakata, S. Wise, Erika D'Ambrosio, Jong H. Chow, David Crooks, M. Lei, B. O'Reilly, Seiji Kawamura, Reinhard Prix, Elizabeth Harstad, D. R. Ingram, S. Reid, Alberto Vecchio, Kenneth G. Libbrecht, Miquel Trias, Pankaj Sarin, T. Hayler, T. Regimbau, G. Traylor, Kevin M. Carter, Alessandra Buonanno, K. A. Thorne, Stefano Marano, R. Gustafson, S. M. Aston, K. Bayer, Jesper Munch, Vincenzo Fiumara, P. Shawhan, Roman Schnabel, Osamu Miyakawa, David H. Reitze, M. Fyffe, Badri Krishnan, K. Watts, H. Rehbein, Richard O'Shaughnessy, B. Barr, P. Patel, Malik Rakhmanov, E. Chalkey, D. J. Hosken, D. S. Rabeling, S. B. Anderson, B. Lee, J. Worden, M. Zanolin, R. J. Dupuis, Christian J. Killow, I. Yakushin, Hirotaka Takahashi, Antony C. Searle, C. M. Mow-Lowry, E. Innerhofer, S. Giampanis, Phil Willems, A. E. Villar, David B. Tanner, L. Williams, A. Rüdiger, N. E. Strand, S. Vass, J. H. Romie, A. Bullington, Rahul Biswas, C. I. Torrie, J. Thacker, D. Hoak, Subhasish Mitra, Ravi Kumar Kopparapu, A. M. Sintes, William E. Butler, Drew Keppel, L. Bogue, Sean T. McWilliams, T. Evans, P. Csatorday, S. Penn, David Jones, Nergis Mavalvala, M. Sung, S. Dhurandhar, V. Parameshwaraiah, M. Brinkmann, Jerome Degallaix, Linqing Wen, D. M. Strom, B. Blair, A. F. Brooks, A. J. Weinstein, Zewu Yan, A. M. Cruise, B. C. Barish, M. Weinert, Shantanu Desai, D. Hoyland, W. W. Johnson, Kip S. Thorne, K. D. Zaleski, G. S. Davies, R. DeSalvo, I. W. Martin, Shuichi Sato, M. Degree, R. Riesen, E. Goetz, H. Yamamoto, Jordan Camp, V. Kondrashov, Maria Alessandra Papa, E. Maros, Martin P McHugh, Harald Lück, M. V. Plissi, David E. McClelland, E. E. Doomes, R. A. Mercer, B. Sears, B. J. J. Slagmolen, M. H. P. M. van Putten, C. Van Den Broeck, D. Chin, Supriyo Sinha, Stanislav Babak, B. Lantz, F. J. Raab, T. Meier, J. Dalrymple, Kent Blackburn, Lisa M. Goggin, L. Sancho De La Jordana, G. Newton, Vuk Mandic, Vicky Kalogera, J. Zweizig, Peter R. Saulson, Duncan A. Brown, I. Leonor, John K. Cannizzo, V. P. Mitrofanov, J. Bogenstahl, Hartmut Grote, Joseph D. Romano, Jared Markowitz, Michael E Zucker, D. Cook, C. Vorvick, Laura Cadonati, Innocenzo M. Pinto, E. L. Robison, Yaohui Fan, H. Ding, Thomas Cokelaer, I. Wilmut, F. Kawazoe, M. C. Araya, J. Garofoli, S. Márka, S. H. Huttner, P. Ehrens, Kasem Mossavi, A. Lazzarini, S. C. McGuire, Daniel C. Woods, S. Klimenko, K. D. Giardina, Richard S. Savage, V. Pierro, J. Hanson, C. Cepeda, Julien Sylvestre, K. Rawlins, A. Moylan, Susan M. Scott, Teviet Creighton, A. L. Stuver, E. J. Daw, Boris Hage, K. Mailand, P. E. Lindquist, J. E. Brau, Maurizio Longo, J. Heefner, R. Grosso, Chad Hanna, K. Wette, J. C. Dumas, Curt Cutler, J. A. Giaime, Gianpietro Cagnoli, N. A. Lockerbie, Matthew Evans, L. Cardenas, R. Frey, Soumya D. Mohanty, X. Siemens, Richard J. Abbott, C. Wilkinson, W. R. Johnston, E. Chin, J. N. Marx, R. P. Croce, Krzysztof Belczynski, R. Mittleman, Nelson Christensen, Karel E. Urbanek, P. J. King, C. Parameswariah, P. Savov, James Whelan, P. G. Murray, N. Zotov, Roger Jones, Philip Nutzman, M. Heurs, K. Ryan, S. W. Ballmer, J. W C McNabb, Ik Siong Heng, F. Nocera, M. Pedraza, K. Kokeyama, D. Ugolini, A. G. Wiseman, P. Ajith, L. Zhang, B. Bhawal, K. Mason, M. Ramsunder, T. Z. Summerscales, S. Grunewald, V. Leonhardt, B. Bland, N. A. Robertson, R. L. Ward, G. Diederichs, I. Gholami, W. Wu, Gabriela Gonzalez, S. Ray-Majumder, R. Bork, J. Myers, Jonathan C. Leiner, V. Re, D. Hammer, M. Vallisneri, F. Seifert, Michael C. B. Ashley, P. T. Beyersdorf, V. Boschi, K. S. Ganezer, J. H. Hough, K. Kawabe, P. Charlton, C. N. Colacino, A. Rodriguez, M. Malec, Shourov Chatterji, D. Fazi, Helena Armandula, Rainer Weiss, Peter Kalmus, C. A. Cantley, N. Rainer, T. Delker, A. Di Credico, S. J. Waldman, Suvadeep Bose, C. Robinson, Massimo Tinto, C. Barker, Benjamin William Allen, Karsten Danzmann, P. Kwee, R. W. P. Drever, Yi Chen, R.L. Coldwell, Carlo Ungarelli, B. Rivera, Pablo Barriga, C. Gray, M. Mageswaran, I. A. Bilenko, V. Dergachev, Slawomir Gras, David J. Ottaway, K. Riles, Kenneth A. Strain, Marco G. Tarallo, J. Slutsky, Nicolás Yunes, A. Grant, Jolien D. E. Creighton, Vincenzo Matta, D. Webber, A. W. Heptonstall, Lindy Blackburn, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, Keisuke Goda, Yi Pan, Chunglee Kim, Martin M. Fejer, J. R. Smith, T. Nash, W. Kells, Erik Katsavounidis, C. Messenger, S. Wiley, A. Sazonov, M. J. Lubinski, R. M S Schofield, D. Jackrel, John G. Dwyer, Haisheng Rong, Vladimir B. Braginsky, H. Vahlbruch, L. Ribichini, G. H. Sanders, A. Ivanov, V. V. Frolov, E. Espinoza, E. Myers, Damien Mudge, S. P. Vyachanin, Kentaro Somiya, W. Tyler, D. C. Coyne, Stephen Fairhurst, Yousuke Itoh, Ping Koy Lam, Kenji Numata, David Coward, A. M. Gretarsson, Pamela J. Russell, S. Richman, Chunnong Zhao, David H. Shoemaker, P. Cochrane, Oliver Jennrich, Roger K. Route, O. Burmeister, Stefan Hild, B. Johnson, W. Winkler, D. Kasprzyk, M. Samidi, G. T. Jones, Giuseppe Castaldi, S. E. Whitcomb, S. Gossler, C. V. Torres, S. Wen, R. McCarthy, H. Bantilan, M. A. Barton, D.B. DeBra, K. Y. Franzen, J. A. Sidles, Fabio Postiglione, D. Sellers, P. J. Veitch, H. Radkins, A. Cumming, A. Dietz, M. Ito, F. Ya. Khalili, Atsushi J. Nishizawa, T. Etzel, S. Saraf, Roberto Conte, C. Aulbert, L. Matone, A. Sibley, E. Messaritaki, M. Lormand, Sanichiro Yoshida, Sheila Rowan, Graham Woan, Robert L. Byer, P. J. Sutton, Ke Sun, J. Dickson, Bernard F. Schutz, Li Ju, Jan Harms, A. S. Sengupta, S. J. Berukoff, J. Greenhalgh, Guido Mueller, H. Overmier, S. Meshkov, Vincenzo Galdi, Benjamin J. Owen, Christopher Wipf, A. Bunkowski, K. V. Tokmakov, R. Schilling, Martin Hewitson, Junwei Cao, E. Hirose, Juri Agresti, H. Müller-Ebhardt, Eric Howell, Michael Landry, G. Billingsley, V. Sandberg, Kirk McKenzie, Morag M. Casey, A. Thüring, A. C. Melissinos, The LIGO Scientific Collaboration, LSC Collaboration, The, Castaldi, G., Galdi, V., Pierro, V., and Pinto, I. M.
Subjects: Nuclear and High Energy Physics, Physics and Astronomy (miscellaneous), NEUTRON-STARS, Frequency band, FOS: Physical sciences, PARALLAX, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, Parameter space, 01 natural sciences, General Relativity and Quantum Cosmology, Radio spectrum, Pulsar, 0103 physical sciences, QC176, ddc:530, 010303 astronomy & astrophysics, Nuclear and High Energy Physic, QB, pulsar, Physics, parallax, 010308 nuclear & particles physics, Gravitational wave, PULSAR, neutron-stars, LIGO, radiation, Neutron star, Amplitude, RADIATION, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
Abstract: We carry out two searches for periodic gravitational waves using the most sensitive few hours of data from the second LIGO science run. The first search is targeted at isolated, previously unknown neutron stars and covers the entire sky in the frequency band 160-728.8 Hz. The second search targets the accreting neutron star in the low-mass X-ray binary Scorpius X-1, covers the frequency bands 464-484 Hz and 604-624 Hz, and two binary orbit parameters. Both searches look for coincidences between the Livingston and Hanford 4-km interferometers. For isolated neutron stars our 95% confidence upper limits on the gravitational wave strain amplitude range from 6.6E-23 to 1E-21 across the frequency band; For Scorpius X-1 they range from 1.7E-22 to 1.3E-21 across the two 20-Hz frequency bands. The upper limits presented in this paper are the first broad-band wide parameter space upper limits on periodic gravitational waves using coherent search techniques. The methods developed here lay the foundations for upcoming hierarchical searches of more sensitive data which may detect astrophysical signals., 35 pages, 30 figures
Published: 2007
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6. Upper limit map of a background of gravitational waves

Author: K. Bayer, P. Shawhan, Ravi Kumar Kopparapu, A. M. Sintes, A. M. Cruise, J. Zweizig, Stefano Marano, S. M. Aston, Badri Krishnan, E. Chalkey, Antony C. Searle, K. Rawlins, S. Sakata, Miquel Trias, C. M. Mow-Lowry, E. Hirose, S. Vass, J. H. Romie, Juri Agresti, Vuk Mandic, G. Mitselmakher, V. Parameshwaraiah, D. Hoyland, S. Chelkowski, D. B. Kozak, H. Overmier, Richard O'Shaughnessy, B. Barr, P. Patel, Malik Rakhmanov, D. Barker, Vincenzo Galdi, J. Worden, L. Williams, A. Rüdiger, L. Ribichini, H. Müller-Ebhardt, C. Van Den Broeck, S. Roddy, Eric Howell, Michael Landry, M. R. Smith, V. Leonhardt, I. Gholami, W. Wu, D. Chin, Supriyo Sinha, Stanislav Babak, P. T. Beyersdorf, P. Aufmuth, Lee Samuel Finn, Duncan A. Brown, R. Riesen, B. O'Reilly, Seiji Kawamura, Reinhard Prix, Elizabeth Harstad, G. Billingsley, J. C. Dumas, V. Boschi, E. Myers, A. Weidner, Soumya D. Mohanty, R. Frey, T. Demma, P. J. King, J. Cannizzo, M. Heurs, A. Bullington, A. G. Wiseman, Osamu Miyakawa, David H. Reitze, V. Sandberg, A. Rodriguez, Rahul Biswas, L. Bogue, S. Klimenko, C. Barker, Kentaro Somiya, D. C. Coyne, I. Yakushin, P. G. Murray, N. Zotov, Hirotaka Takahashi, C. I. Torrie, A. Dietz, D. Meyers, A. Bunkowski, R.L. Coldwell, J. A. Giaime, P. Schwinberg, Sanichiro Yoshida, Richard J. Abbott, Innocenzo M. Pinto, Thomas Cokelaer, Sean T. McWilliams, S. Penn, K. Mason, Nicolás Yunes, K. Kokeyama, T. Evans, H. Zur Mühlen, W. G. Anderson, Maurizio Longo, Krzysztof Belczynski, R. Mittleman, M. C. Díaz, Kenji Numata, R. P. Croce, A. Grant, Graham Woan, Robert L. Byer, R. Schilling, M. Weinert, A. Cumming, S. Ray-Majumder, Peter Fritschel, V. Kondrashov, B. Sears, Pankaj Sarin, Karel E. Urbanek, Benno Willke, J. Clark, L. Ruet, J. N. Marx, J. Bogenstahl, Michael E Zucker, P. J. Sutton, Bernard F. Schutz, Li Ju, B. P. Abbott, T. Etzel, Nelson Christensen, B. Bland, C. N. Colacino, Jordan Camp, Malcolm B. Gray, D. Cook, D. Ugolini, Yaohui Fan, T. Meier, J. Dalrymple, Gabriela Gonzalez, G. Traylor, Guido Mueller, P. Charlton, Kirk McKenzie, Keisuke Goda, A. Di Credico, Yi Chen, J. Betzwieser, Francesco Chiadini, E. Messaritaki, M. Lormand, D. R. Ingram, A. Franzen, G. Newton, Richard S. Savage, V. Pierro, Alessandra Buonanno, K. A. Thorne, Sheila Rowan, C. Vorvick, S. Mukherjee, B. Bhawal, G. Moreno, M. Ito, Vincenzo Fiumara, Rana X. Adhikari, Gareth Jones, D. Busby, C. A. Cantley, H. Rehbein, S. Meshkov, I. A. Bilenko, V. Dergachev, K. Watts, S. B. Anderson, M. J. Lubinski, B. F. Whiting, B. Machenschalk, Martin P McHugh, B. J. J. Slagmolen, E. Chin, D. S. Rabeling, Stephen Fairhurst, M. Zanolin, J. Hanson, C. Cepeda, J. E. Brau, Gianpietro Cagnoli, J. Zhang, David J. Ottaway, J. Dickson, Jan Harms, A. S. Sengupta, K. Mailand, David B. Tanner, Matthew Evans, E. Innerhofer, S. Giampanis, R. M S Schofield, D. Jackrel, J. Greenhalgh, H. J. Pletsch, Thomas Corbitt, K. D. Giardina, R. Bork, M. Pedraza, C. Robinson, Benjamin William Allen, Karsten Danzmann, C. Gray, Slawomir Gras, L. Cardenas, J. Thacker, A. E. Villar, N. Fotopoulos, R. Rahkola, S. E. Whitcomb, S. Gossler, R. Taylor, Marco G. Tarallo, R. A. Mercer, Giuseppe Castaldi, F. Ya. Khalili, Atsushi J. Nishizawa, Benjamin J. Owen, Harald Lück, G. Diederichs, Drew Keppel, Zewu Yan, M. Sung, S. Dhurandhar, A. F. Brooks, A. J. Weinstein, Christopher Wipf, K. V. Tokmakov, J. Myers, M. Guenther, Patrick Brady, S. C. McGuire, A. M. Rogan, Erika D'Ambrosio, B. Lee, S. Saraf, John G. Dwyer, Vladimir B. Braginsky, Martin Hewitson, Junwei Cao, J. Slutsky, D. Webber, Maria Alessandra Papa, Laura Cadonati, W. W. Johnson, M. Degree, Shourov Chatterji, D. Hoak, D. Fazi, S. J. Waldman, Suvadeep Bose, Roberto Conte, David Jones, Nergis Mavalvala, Jerome Degallaix, C. Aulbert, E. Goetz, Jesper Munch, Kent Blackburn, M. V. Plissi, I. Leonor, T. Z. Summerscales, L. Matone, B. C. Barish, Alberto Vecchio, A. Moylan, Susan M. Scott, G. S. Davies, Teviet Creighton, R. DeSalvo, H. Vahlbruch, E. Espinoza, J. H. Hough, S. Wise, K. Ryan, V. Quetschke, K. Kawabe, Peter R. Saulson, Bangalore Suryanarayana Sathyaprakash, E. Black, Shantanu Desai, Kip S. Thorne, E. E. Doomes, R. L. Ward, A. Sibley, Martin M. Fejer, Helena Armandula, J. R. Smith, Ke-Xun Sun, A. L. Stuver, Hartmut Grote, N. Rainer, R. J. Dupuis, R. Gustafson, L. Sancho De La Jordana, P. Kwee, S. Reid, Kenneth G. Libbrecht, Jonathan C. Leiner, Chad Hanna, V. Kalogera, D. M. Strom, X. Siemens, C. Wilkinson, V. Re, V. P. Mitrofanov, Yousuke Itoh, P. E. Lindquist, M. C. Araya, W. Kells, D. J. Hosken, Boris Hage, E. Katsavounidis, Vincenzo Matta, D. M. Whitbeck, A. W. Heptonstall, A. Ivanov, J. W C McNabb, S. Márka, K. C. Cannon, S. H. Huttner, Daniel C. Woods, N. A. Robertson, Damien Mudge, Rainer Weiss, Roman Schnabel, T. T. Fricke, S. P. Vyachanin, D. Hammer, M. Vallisneri, F. Seifert, Michael C. B. Ashley, Subhasish Mitra, W. Tyler, J. Heefner, R. Grosso, Kenneth A. Strain, Shuichi Sato, Eugeniy E. Mikhailov, A. M. Gretarsson, David Coward, C. Messenger, Peter Kalmus, C. V. Torres, Carlo Ungarelli, Y. Pan, N. A. Lockerbie, E. Maros, R. W. P. Drever, P. Savov, James Whelan, P. Ajith, Ik Siong Heng, L. Zhang, Emma L. Robinson, Pamela J. Russell, S. Grunewald, Roger K. Route, Joseph D. Romano, Jared Markowitz, S. Wen, Kasem Mossavi, A. Lazzarini, David Blair, K. Riles, Stefan Hild, Chunnong Zhao, Jolien D. E. Creighton, M. Malec, Phil Willems, Lindy Blackburn, David H. Shoemaker, P. Cochrane, Chunglee Kim, O. Burmeister, H. Yamamoto, B. Lantz, F. J. Raab, Lisa M. Goggin, B. Johnson, W. Winkler, D. Kasprzyk, M. Samidi, H. Radkins, R. McCarthy, H. Bantilan, M. A. Barton, D.B. DeBra, K. Y. Franzen, J. A. Sidles, Fabio Postiglione, D. Sellers, P. J. Veitch, Andreas Freise, Matthew Pitkin, J. G. Rollins, G. Mendell, M. Varvella, R. Wooley, V. Sannibale, T. Hayler, H. Ward, L. Wallace, John Veitch, Sascha Schediwy, M. MacInnis, R. S. Amin, I. Wilmut, F. Kawazoe, J. Garofoli, J. S. Kissel, Roger Jones, B. Rivera, Pablo Barriga, M. Mageswaran, V. V. Frolov, Ping Koy Lam, D. Sigg, M. A. Arain, Gregory M. Harry, M. Lei, M. Fyffe, Morag M. Casey, A. Thüring, A. C. Melissinos, I. W. Martin, David E. McClelland, P. Ehrens, K. Wette, S. W. Ballmer, Jong H. Chow, David Crooks, M. Brinkmann, The LIGO Scientific Collaboration, LSC Collaboration, The, Castaldi, G., Galdi, V., Pierro, V., and Pinto, I. M.
Subjects: Nuclear and High Energy Physics, Physics and Astronomy (miscellaneous), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, 01 natural sciences, Power law, General Relativity and Quantum Cosmology, Gravitational wave background, QC350, 0103 physical sciences, ddc:530, Limit (mathematics), 010306 general physics, QC, QB, Nuclear and High Energy Physic, Physics, 010308 nuclear & particles physics, Gravitational wave, Astrophysics (astro-ph), Isotropy, Spectral density, LIGO, radiation, Amplitude, RADIATION, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
Abstract: We searched for an anisotropic background of gravitational waves using data from the LIGO S4 science run and a method that is optimized for point sources. This is appropriate if, for example, the gravitational wave background is dominated by a small number of distinct astrophysical sources. No signal was seen. Upper limit maps were produced assuming two different power laws for the source strain power spectrum. For an f^-3 power law and using the 50 Hz to 1.8 kHz band the upper limits on the source strain power spectrum vary between 1.2e-48 Hz^-1 (100 Hz/f)^3 and 1.2e-47 Hz^-1 (100 Hz /f)^3, depending on the position in the sky. Similarly, in the case of constant strain power spectrum, the upper limits vary between 8.5e-49 Hz^-1 and 6.1e-48 Hz^-1. As a side product a limit on an isotropic background of gravitational waves was also obtained. All limits are at the 90% confidence level. Finally, as an application, we focused on the direction of Sco-X1, the closest low-mass X-ray binary. We compare the upper limit on strain amplitude obtained by this method to expectations based on the X-ray luminosity of Sco-X1., Comment: 11 pages, 9 figures, 2 tables
Published: 2007

7. Search for gravitational waves from binary black hole inspirals in LIGO data

Author: Linqing Wen, T. Etzel, Joseph D. Romano, C. King, Kasem Mossavi, J. E. Brau, W. R. Johnston, Laura Cadonati, K. Kawabe, P. Csatorday, A. Chandler, Kevin M. Ryan, J. Betzwieser, D. Debra, W. Kells, Lindon J. Robison, A. Wilson, A. L. Stuver, J. S. Noel, M. Fyffe, O. Matherny, B. Lantz, Susan M. Scott, Teviet Creighton, Herbert Walther, Y. Hefetz, Gerhard Heinzel, C. Hardham, Helena Armandula, E. J. Elliffe, M. V. Plissi, Roman Schnabel, S. Penn, Karsten Kötter, Pamela J. Russell, S. Richman, B. Barr, H. Ward, Chad Hanna, A. Heptonstall, J. Worden, A. Rüdiger, K. Rawlins, Benno Willke, K. D. Zaleski, Oliver Jennrich, Subhasish Mitra, Marco G. Tarallo, X. Siemens, C. Wilkinson, J. Castiglione, D. Barker, K. A. Thorne, Adrian C. Ottewill, P. Charlton, Michael E Zucker, A. Di Credico, D. Churches, L. Ruet, Hartmut Grote, R. Riesen, D. Webber, B. F. Whiting, John Veitch, S. Roddy, Roland Schilling, M. Fine, E. J. Daw, S. Dhurandhar, Krzysztof Belczynski, R. Mittleman, Nelson Christensen, A. Hartunian, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, D. Ugolini, Carsten Fallnich, Stefan Hild, M. A. Barton, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, Alessandra Buonanno, E. Black, Martin M. Fejer, J. R. Smith, S. Klimenko, T. Nash, V. V. Frolov, M. MacInnis, S. Mukherjee, Sanichiro Yoshida, D. Sellers, A. M. Sintes, P. Aufmuth, Jeffrey A. Edlund, F. Nocera, Lee Samuel Finn, J. W C McNabb, D. Jungwirth, A. Sazonov, Manuel Luna, K. Reithmaier, A. Gillespie, Andreas Freise, A. Libson, Matthew Pitkin, A. Ivanov, M. Mageswaran, R. Wooley, R. Burgess, Daniel C. Woods, N. A. Robertson, Richard J. Abbott, I. Yakushin, P. E. Lindquist, H. Radkins, S. P. Vyachanin, M. Coles, M. Guenther, D. I. Robertson, C. Torres, Graham Woan, A. Rodriguez, Robert L. Byer, K. Y. Franzen, E. Maros, Stuart Reid, Curt Cutler, C. Gray, C. A. Cantley, T. Regimbau, Roy Williams, K. Wette, R. Coldwell, W. Tyler, T. Evans, Carlo Ungarelli, Michael D. Smith, Keisuke Goda, David Jones, Guenakh Mitselmakher, C. I. Torrie, C. Barker, V. Parameshwaraiah, K. S. Ganezer, Patrick Brady, Pankaj Sarin, D. Farnham, Raymond G. Beausoleil, A. Ageev, M. Hammond, C. Messenger, M. Lormand, O. Spjeld, R. Zhu, W. Hua, C. Robinson, Benjamin William Allen, K. Watts, B. Bland, V. Chickarmane, I. Zawischa, D. Sigg, W. W. Johnson, S. W. Ballmer, Stefan Goßler, R. Gustafson, Karsten Danzmann, M. C. Sumner, R. Balasubramanian, M. Rakhmanov, V. Schmidt, D. Chin, Stanislav Babak, Walid A. Majid, Erik Katsavounidis, Phil Willems, Gavin Davies, Duncan A. Brown, Walter Winkler, J. Kern, P. G. Murray, D. Steussy, B. Sears, Kevin M. Carter, J. A. Giaime, S. B. Anderson, Jan Harms, William E. Butler, Peter R. Saulson, M. Ito, Martin P McHugh, B. J. Cusack, Brent Ware, Bernard F. Schutz, Eileen S. Rotthoff, Vladimir B. Braginsky, Kevin C. Schlaufman, J. H. Hough, S. E. Seader, B. Bhawal, David B. Tanner, H. Ding, G. Mendell, M. W. Regehr, Marco Aurelio Diaz, M. Sung, S. Grunewald, K. Riles, M. H. P. M. van Putten, S. Tilav, L. Jones, Rana X. Adhikari, Gareth Jones, L. Sievers, Robert Bennett, Thomas Cokelaer, Peter H. Sneddon, G. Stapfer, Gregory M. Harry, Erika D'Ambrosio, Michele Zanolin, C. A. Shapiro, M. Pedraza, Vicky Kalogera, Robert Spero, Soumya D. Mohanty, Harald Lück, U. Weiland, S. R. Rao, M. Lei, T. Olson, M. Barnes, Julien Sylvestre, D. M. Strom, L. Wallace, S. J. Berukoff, R. Bork, N. Zotov, S. Seel, Lisa M. Goggin, K. Mason, R. Frey, A. Marin, C. Aulbert, Scott Koranda, C. Parameswariah, J. Langdale, Sandra E. Wiley, Gabriela Gonzalez, P. J. King, D. Grimmett, I. Leonor, Philip Nutzman, L. Matone, M. Ashley, D. Coyne, A. M. Gretarsson, D. Cook, A. Khan, J. Mason, Virginio Sannibale, David E. McClelland, G. Moreno, Guido Mueller, Yousuke Itoh, B. Bochner, Maria Alessandra Papa, Kent Blackburn, Herbert Welling, Massimo Tinto, Nergis Mavalvala, B. C. Barish, H. Yamamoto, A. Grant, J. Garofoli, Stephen Fairhurst, A. G. Wiseman, S. Wen, Lindy Blackburn, P. Ehrens, Chunglee Kim, V. Sandberg, Michele Vallisneri, A. Sibley, B. Machenschalk, S. Ray-Majumder, Seiji Kawamura, S. Márka, B. Rivera, Philippe Grandclément, K. T. Reilly, David H. Shoemaker, Shantanu Desai, Ik Siong Heng, F. Asiri, Kip S. Thorne, A. J. Weinstein, W. Wu, R. W.P. Drever, F. Mann, Peter Fritschel, Shinji Miyoki, Kenneth A. Strain, A. Weidner, R. A. Mercer, J. Heefner, B. O'Reilly, Reinhard Prix, V. P. Mitrofanov, P. J. Sutton, Haisheng Rong, K. C. Cannon, M. Lubinski, S. E. Whitcomb, M. C. Araya, B. Johnson, W. O. Hamilton, C. N. Colacino, K. Mailand, J. Chapsky, J. Hanson, Osamu Miyakawa, David H. Reitze, S. Killbourn, H. Overmier, James Whelan, Juri Agresti, A. Rizzi, G. Traylor, P. Ajith, L. Zhang, Thomas Corbitt, Christian J. Killow, Akiteru Takamori, Badri Krishnan, Antony C. Searle, T. Findley, S. Liu, D. Ouimette, Yi Chen, J. Cannizzo, J. Allen, D. Kozak, N. Hepler, M. Hennessy, Q. Z. Shu, R. L. Ward, M. Hrynevych, A. Bunkowski, T. Summerscales, Frank Seifert, Joseph M. Kovalik, S. Wise, E. Messaritaki, Sheila Rowan, J. H. Romie, K. Bayer, Michael Landry, S. Meshkov, Kenneth G. Libbrecht, F. J. Raab, S. Chelkowski, R. McCarthy, G. Billingsley, C. Vorvick, P. Schwinberg, J. D. E. Creighton, I. Salzman, R. Amin, W. G. Anderson, Peter Shawhan, M. Tibbits, B. P. Abbott, R. M. S. Schofield, S. Vass, J. Zweizig, Benjamin J. Owen, E. Myers, K. V. Tokmakov, D. Busby, Junwei Cao, R. L. Savage, S. Nagano, D. Redding, M. Malec, P. Hoang, Eugeniy E. Mikhailov, Alberto Vecchio, A. Lazzarini, Richard J. K. Taylor, Gianpietro Cagnoli, J. Myers, Shourov Chatterji, Suvadeep Bose, M. R. Smith, G. H. Sanders, R. Lawrence, M. Hewitson, Morag M. Casey, M. Heurs, B. J. Winjum, A. C. Melissinos, David Crooks, A. Bullington, L. Bogue, D. Rose, R. Desalvo, V. Re, Rainer Weiss, N. Hindman, J. G. Rollins, Jordan Camp, T. Delker, P. R. Williams, J. Dalrymple, A. S. Sengupta, H. Tariq, G. Newton, Matthew Evans, L. Cardenas, Vuk Mandic, Yi Pan, Eric K. Gustafson, T. T. Lyons, J. Logan, R. K. Nayak, R. Rahkola, R. J. Dupuis, and The LIGO Scientific Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Gravitational-wave observatory, 010308 nuclear & particles physics, Gravitational wave, FOS: Physical sciences, Binary number, Astronomy, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, 01 natural sciences, Cosmology, LIGO, General Relativity and Quantum Cosmology, filters, Interferometry, Binary black hole, 0103 physical sciences, Astronomical interferometer, ddc:530, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, FILTERS, 010303 astronomy & astrophysics, QC
Abstract: We report on a search for gravitational waves from binary black hole inspirals in the data from the second science run of the LIGO interferometers. The search focused on binary systems with component masses between 3 and 20 solar masses. Optimally oriented binaries with distances up to 1 Mpc could be detected with efficiency of at least 90%. We found no events that could be identified as gravitational waves in the 385.6 hours of data that we searched., 18 pages, 8 figures
Published: 2006

8. Joint LIGO and TAMA300 Search for Gravitational Waves from Inspiralling Neutron Star Binaries

Author: J. E. Brau, Subhasish Mitra, D. Churches, A. J. Weinstein, W. Wu, P. T. Beyersdorf, A. Grant, S. Liu, L. Zhang, Keisuke Goda, Erik Katsavounidis, Daisuke Tatsumi, A. Wilson, M. J. Lubinski, Vladimir B. Braginsky, K. Riles, Yousuke Itoh, Ken-ichi Nakao, A. Ageev, M. Lormand, M. Fine, K. Rawlins, A. Bunkowski, Kazuyuki Miura, J. Logan, R. K. Nayak, Rebecca Abbott, J. Heefner, Mayu Katsuki, David H. Shoemaker, R. Rahkola, Y. Hefetz, Shigemi Otsuka, Peter Fritschel, Gerhard Heinzel, C. Hardham, Hideki Ishitsuka, Hideki Asada, Jan Harms, Alberto Vecchio, Juri Agresti, A. Rizzi, S. Penn, Benno Willke, L. Ruet, Kazuaki Kuroda, Robert J. McCarthy, Linqing Wen, Pamela J. Russell, S. Richman, K. C. Cannon, A. Bullington, F. Mann, Shuichi Sato, Masaru Shibata, A. Gillespie, Oliver Jennrich, Akitoshi Ueda, L. Bogue, R. L. Savage, V. V. Frolov, Curt Cutler, Alessandra Buonanno, V. Parameshwaraiah, I. Leonor, John K. Cannizzo, T. Summerscales, S. Nagano, Yusaku Hamuro, Darby Kozak, K. A. Thorne, J. Betzwieser, M. C. Araya, D. Ugolini, Mitsuru Musha, Y. Saito, Carsten Fallnich, Yoshikazu Karasawa, R. J. Dupuis, Kiminori Kondo, C. Torres, A. Rodriguez, C. Barker, B. Johnson, Naoki Seto, D. Redding, Youhei Sato, Joseph D. Romano, C. King, Stefan Hild, N. Sato, C. A. Cantley, C. Robinson, Benjamin William Allen, Karsten Danzmann, M. C. Sumner, Shoken M. Miyama, D. Chin, Stanislav Babak, Kasem Mossavi, Walid A. Majid, Duncan A. Brown, P. Hoang, G. Traylor, Thomas Corbitt, Michael Landry, G. Billingsley, Michele Vallisneri, Ik Siong Heng, Fumiko Kawazoe, H. Tariq, Shigenori Moriwaki, J. Chapsky, S. Meshkov, Akiteru Takamori, Pankaj Sarin, D. Farnham, Akito Araya, E. J. Daw, Brent Ware, Y. Ogawa, Norikatsu Mio, G. Mendell, Soma Mukherjee, Sanichiro Yoshida, M. R. Smith, Shinji Miyoki, Graham Woan, Zong Hong Zhu, Robert L. Byer, Stuart Reid, Shihori Sakata, A. M. Gretarsson, D. Rose, C. A. Shapiro, V. Schmidt, Toru Tanji, T. Nakamura, E. Rotthoff, P. Csatorday, William E. Butler, Eugeniy E. Mikhailov, T. Findley, E. Messaritaki, Morag M. Casey, M. Heurs, D. Ouimette, C. Gray, Erika D'Ambrosio, A. Chandler, B. J. Winjum, C. Parameswariah, M. Rakhmanov, Vuk Mandic, Bernard F. Schutz, H. Yamamoto, Takaharu Kaneyama, J. W C McNabb, Laura Cadonati, Walter Winkler, Sheila Rowan, Harald Lück, G. Stapfer, Kevin M. Ryan, J. Hanson, Yoshitaka Nagayama, J. Langdale, G. P. Newton, M. Fyffe, N. A. Robertson, Ken-ichi Ueda, Sandra E. Wiley, Gabriela Gonzalez, Ken'ichi Nakagawa, Martin P McHugh, V. Re, Susan M. Scott, G. H. Sanders, R. Lawrence, M. H. P. M. van Putten, Koichi Waseda, C. Aulbert, S. Tilav, Guido Mueller, Rana X. Adhikari, Gareth Jones, H. Overmier, Roy Williams, J. A. Giaime, Katsuaki Kasahara, Eric K. Gustafson, Hideo Iguchi, Kentaro Somiya, Kenji Soida, B. Machenschalk, P. R. Williams, Takashi Kuwabara, Richard J. K. Taylor, S. Wise, D. Sellers, Teviet Creighton, S. Grunewald, Herbert Walther, Chad Hanna, K. Kötter, C. Wilkinson, Gianpietro Cagnoli, Toshikazu Suzuki, Rainer Weiss, T. Etzel, A. C. Melissinos, K. Oohara, T. T. Lyons, E. Maros, M. V. Plissi, M. Kawamura, Shantanu Desai, Kip S. Thorne, B. Lantz, K. S. Ganezer, Kouichi Sato, Albert Lazzarini, M. Coles, M. Guenther, Tomiyoshi Haruyama, R. W. P. Drever, Kenji Numata, Masaki Ando, K. Watts, Kenneth G. Libbrecht, I. Salzman, Stefan Goßler, Michael D. Smith, Marco G. Tarallo, K. T. Reilly, W. W. Johnson, J. Myers, F. Nocera, J. Allen, N. Hepler, Ryuichi Fujita, W. O. Hamilton, Scott Koranda, D. Webber, V. P. Mitrofanov, R. M. S. Schofield, C. Vorvick, A. Marin, Yoshio Nishi, Shuzo Takemoto, B. Bochner, Akira Okutomi, Hideaki Kudoh, Benjamin J. Owen, P. Schwinberg, V. Quetschke, Shourov Chatterji, W. R. Johnston, Yoshihide Kozai, Bangalore Suryanarayana Sathyaprakash, E. Black, Norihiko Kamikubota, Patrick Brady, Suvadeep Bose, Takayuki Tomaru, Masatake Ohashi, Kevin C. Schlaufman, E. Myers, K. V. Tokmakov, S. Killbourn, Carlo Ungarelli, Martin M. Fejer, Hideyuki Tagoshi, J. R. Smith, R. Bork, T. Regimbau, Toshifumi Futamase, C. I. Torrie, Herbert Welling, A. Heptonstall, M. Malec, T. Nash, W. G. Anderson, Peter Shawhan, M. Tibbits, B. P. Abbott, A. Sazonov, Seiji Kawamura, Nobuyuki Kanda, Hartmut Grote, James Whelan, P. Ajith, L. Matone, Yukiyoshi Iida, Martin Hewitson, Massimo Tinto, Nergis Mavalvala, J. G. Rollins, Junwei Cao, Reinhard Prix, Naoko Ohishi, B. C. Barish, K. D. Zaleski, Phil Willems, M. Hrynevych, R. DeSalvo, S. Vass, W. Kells, P. Ehrens, D. Busby, D. M. Strom, Masa-Katsu Fujimoto, Kevin M. Carter, T. Delker, P. G. Murray, Osamu Miyakawa, David H. Reitze, Christian J. Killow, S. B. Anderson, Hiroyuki Nakano, Misao Sasaki, Jordan Camp, A. Sibley, J. Dalrymple, Masao Tokunari, Lindon J. Robison, A. S. Sengupta, J. H. Hough, D. Jungwirth, Philippe Grandclément, P. E. Lindquist, K. Wette, Peter Aufmuth, David B. Tanner, M. W. Regehr, Lisa M. Goggin, Douglas R. Cook, M. Sung, P. J. Sutton, Haisheng Rong, Timothy Evans, Helena Armandula, E. J. Elliffe, Kazuhiro Hayama, M. Pedraza, Michele Zanolin, S. Seel, R. Coldwell, Jeffrey A. Edlund, M. A. Barton, D. Sigg, Keiko Kokeyama, Gavin Davies, D. Steussy, Koji Arai, R. Burgess, Maria Alessandra Papa, V. Chickarmane, Daniel C. Woods, B. Sears, Kimio Tsubono, T. Akutsu, S. W. Ballmer, Kent Blackburn, S. Wen, D. I. Robertson, Vicky Kalogera, Souichi Telada, J. Mason, B. Bhawal, D.B. DeBra, S. J. Berukoff, K. Y. Franzen, M. Hammond, J. Kern, Hisa-aki Shinkai, L. Jones, Robert Bennett, A. Yamamoto, Matthew Evans, L. Cardenas, Yi Pan, S. Klimenko, Ryutaro Takahashi, Y. Tsunesada, G. Moreno, Robert Spero, Soumya D. Mohanty, David Crooks, N. Zotov, K. Mason, Sanjeev Dhurandhar, S. Ray-Majumder, Xavier Siemens, C. N. Colacino, Yi Chen, M. Hennessy, Q. Z. Shu, R. L. Ward, M. Ito, J. H. Romie, K. Bayer, F. J. Raab, R. Gustafson, S. Márka, Takakazu Shintomi, J. Zweizig, Kohei Takeno, B. Bland, U. Weiland, Takahiro Tanaka, Kenneth A. Strain, S. E. Seader, A. Weidner, R. A. Mercer, Michael E Zucker, Stephen Fairhurst, Tatsuru Yoshida, A. L. Stuver, O. Matherny, Manuel Luna, B. O'Reilly, J. S. Noel, B. Barr, Hiromi Mizusawa, J. Worden, A. Rüdiger, Namio Matsuda, J. Castiglione, Youhei Fujiki, P. Charlton, R. Riesen, A. Di Credico, Roland Schilling, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, Marco Aurelio Diaz, Nobuhiro Tsuda, David Jones, Peter R. Saulson, Taketoshi Kasai, F. Asiri, Badri Krishnan, H. Ding, Takashi Uchiyama, Antony C. Searle, Kunihito Ioka, Frank Seifert, B. F. Whiting, Joseph M. Kovalik, S. E. Whitcomb, I. Yakushin, Hirotaka Takahashi, Keisuke Taniguchi, B. J. Cusack, Guenakh Mitselmakher, S. R. Rao, O. Spjeld, R. Zhu, Toshitaka Yamazaki, M. Ashley, Mitsuhiro Fukushima, L. Sievers, Jolien D. E. Creighton, Thomas Cokelaer, Lindy Blackburn, Yuriko Yanagi, Chunglee Kim, V. Sandberg, D. Barker, A. Ivanov, H. Radkins, S. P. Vyachanin, S. Chelkowski, W. Tyler, S. Roddy, Raymond G. Beausoleil, R. Balasubramanian, A. M. Sintes, Lee Samuel Finn, M. Barnes, Julien Sylvestre, Yoichi Aso, L. Wallace, R. Frey, P. J. King, D. Grimmett, Philip Nutzman, A. G. Wiseman, D. C. Coyne, K. Reithmaier, Andreas Freise, A. Libson, Matthew Pitkin, R. Wooley, I. Zawischa, Peter H. Sneddon, Yasufumi Kojima, J. Garofoli, K. Kawabe, B. Rivera, M. Mageswaran, H. Ward, John Veitch, Jun'ichi Yokoyama, M. MacInnis, R. S. Amin, Kazuhiro Yamamoto, N. Hindman, Gregory M. Harry, M. Lei, T. Olson, A. Khan, Virginio Sannibale, David E. McClelland, C. Messenger, W. Hua, Aya Sekido, Adrian C. Ottewill, K. Mailand, Krzysztof Belczynski, R. Mittleman, Nelson Christensen, A. Hartunian, Roman Schnabel, The LIGO Scientific Collaboration, and TAMA Collaboration
Subjects: Nuclear and High Energy Physics, templates, Milky Way, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, 01 natural sciences, coalescence rates, neutron stars, Cosmology, General Relativity and Quantum Cosmology, binary stars, gravitational wave detectors, 0103 physical sciences, Binary star, ddc:530, compact binaries, 010306 general physics, QC, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Gravitational wave, Astronomy, LIGO, Galaxy, Neutron star, Stars, gravitational waves, light interferometry, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
Abstract: We search for coincident gravitational wave signals from inspiralling neutron star binaries using LIGO and TAMA300 data taken during early 2003. Using a simple trigger exchange method, we perform an inter-collaboration coincidence search during times when TAMA300 and only one of the LIGO sites were operational. We find no evidence of any gravitational wave signals. We place an observational upper limit on the rate of binary neutron star coalescence with component masses between 1 and 3 M_sun of 49 per year per Milky Way equivalent galaxy at a 90% confidence level. The methods developed during this search will find application in future network inspiral analyses., 9 pages, 5 figures. Updated with published version
Published: 2005

9. Search for gravitational waves from primordial black hole binary coalescences in the galactic halo

Author: Laura Cadonati, B. F. Whiting, P. G. Murray, D. Rose, H. Overmier, Susan M. Scott, Teviet Creighton, Herbert Walther, J. H. Hough, X. Siemens, K. Kötter, C. Wilkinson, M. Coles, M. Guenther, A. Rizzi, V. Re, J. Heefner, Douglas R. Cook, L. Jones, Roman Schnabel, J. E. Brau, B. Bland, U. Weiland, Michele Zanolin, Patrick Brady, S. Seel, Rainer Weiss, R. W. P. Drever, O. Matherny, S. E. Seader, F. Nocera, B. Barr, J. Worden, A. Rüdiger, R. Riesen, D. Churches, Roland Schilling, Richard J. K. Taylor, Gianpietro Cagnoli, T. Summerscales, M. A. Barton, W. W. Johnson, C. A. Shapiro, Stephen Fairhurst, J. H. Romie, K. Bayer, F. J. Raab, F. Asiri, S. E. Whitcomb, Michael Landry, T. Findley, D. Ouimette, A. M. Gretarsson, Philippe Grandclément, P. J. Sutton, Haisheng Rong, Michele Vallisneri, R. Gustafson, D.B. DeBra, K. Rawlins, A. Bunkowski, T. Regimbau, A. Wilson, H. Ward, C. I. Torrie, A. Heptonstall, M. Malec, D. Steussy, B. Sears, K. Y. Franzen, Jordan Camp, Ik Siong Heng, Vicky Kalogera, E. Messaritaki, G. Billingsley, M. Hammond, J. Myers, Phil Willems, M. W.E. Smith, J. Kern, A. S. Sengupta, Y. Hefetz, G. Mendell, Scott Koranda, L. Matone, S. Wise, S. Chatterji, Sheila Rowan, R. J. Dupuis, Suvadeep Bose, D. M. Strom, S. Grunewald, B. Lantz, John Veitch, Gerhard Heinzel, C. Hardham, Benno Willke, A. Sibley, Richard S. Savage, J. Mason, J. Zweizig, K. D. Zaleski, David Jones, R. DeSalvo, N. A. Robertson, Kenneth G. Libbrecht, I. Salzman, D. B. Kozak, C. Vorvick, Seiji Kawamura, Reinhard Prix, A. J. Weinstein, W. Wu, Matthew Evans, L. Cardenas, A. Gillespie, C. Parameswariah, R. M. S. Schofield, Alberto Vecchio, Yi Pan, M. MacInnis, Osamu Miyakawa, C. A. Cantley, David H. Reitze, Benjamin J. Owen, Peter R. Saulson, Shinji Miyoki, Christian J. Killow, K. Reithmaier, Andreas Freise, A. Libson, Matthew Pitkin, Alessandra Buonanno, Benjamin William Allen, S. Klimenko, R. Abbott, J. Langdale, G. P. Newton, M. Fyffe, W. G. Anderson, K. V. Tokmakov, S. Penn, Robert Spero, Soumya D. Mohanty, A. Ageev, C. Aulbert, Peter Shawhan, M. Tibbits, B. P. Abbott, Sandra E. Wiley, Gabriela Gonzalez, H. Tariq, Pamela J. Russell, S. Richman, Oliver Jennrich, Karsten Danzmann, M. C. Sumner, M. Lormand, M. Fine, S. Vass, Martin Hewitson, R. Wooley, N. Zotov, K. Mason, Jan Harms, A. Grant, S. Liu, K. A. Thorne, J. Betzwieser, Peter Fritschel, D. Ugolini, Carsten Fallnich, Jeffrey A. Edlund, Sanichiro Yoshida, W. Kells, D. Busby, Carlo Ungarelli, J. S. Noel, M. Ito, Graham Woan, Sanjeev Dhurandhar, S. Ray-Majumder, Robert L. Byer, Stuart Reid, Stefan Hild, R. Burgess, A. Bullington, Daniel C. Woods, Erika D'Ambrosio, S. Nagano, C. Torres, Soma Mukherjee, M. Rakhmanov, C. N. Colacino, Bernard F. Schutz, D. Redding, Keisuke Goda, M. R. Smith, M. Hrynevych, L. Bogue, D. I. Robertson, G. Stapfer, V. V. Frolov, J. Castiglione, P. Hoang, C. Barker, I. Zawischa, J. Hanson, Guido Mueller, P. Charlton, Erik Katsavounidis, I. Leonor, V. Parameshwaraiah, A. Di Credico, Yi Chen, H. Yamamoto, M. Hennessy, Q. Z. Shu, Roy Williams, M. J. Lubinski, S. Meshkov, G. Traylor, Thomas Corbitt, Akiteru Takamori, D. Barker, Walter Winkler, Harald Lück, Kip S. Thorne, D. Chin, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, S. Wen, D. Farnham, E. J. Daw, Stanislav Babak, Walid A. Majid, K. S. Ganezer, K. Watts, Vladimir B. Braginsky, Curt Cutler, G. H. Sanders, R. Lawrence, K. Riles, Duncan A. Brown, Stefan Goßler, V. Schmidt, S. Chelkowski, David H. Shoemaker, V. P. Mitrofanov, N. Hepler, K. T. Reilly, R. Bennett, William E. Butler, R. Amin, Brent Ware, M. C. Araya, W. O. Hamilton, A. Marin, Yousuke Itoh, F. Mann, Kevin C. Schlaufman, T. Etzel, Herbert Welling, Nergis Mavalvala, P. Ehrens, J. W C McNabb, B. Bochner, A. Stuver, S. Roddy, Martin P McHugh, M. H. P. M. van Putten, S. Killbourn, S. Tilav, B. C. Barish, Massimo Tinto, E. Rotthoff, Kevin M. Carter, B. Johnson, James Whelan, S. B. Anderson, P. Schwinberg, J. Chapsky, D. Webber, E. Maros, H. Ding, L. Zhang, Rana X. Adhikari, B. Machenschalk, V. Quetschke, David B. Tanner, Bangalore Suryanarayana Sathyaprakash, E. Black, M. W. Regehr, Martin M. Fejer, J. R. Smith, R. Bork, T. Nash, C. Gray, Peter H. Sneddon, A. Sazonov, M. Pedraza, Maria Alessandra Papa, Kent Blackburn, A. M. Sintes, J. Garofoli, Lee Samuel Finn, Robert J. McCarthy, K. Kawabe, B. Rivera, I. Yakushin, Linqing Wen, M. Mageswaran, Guenakh Mitselmakher, J. A. Giaime, Eric K. Gustafson, R. Zhu, L. Sievers, Thomas Cokelaer, M. Barnes, Julien Sylvestre, Timothy Evans, T. T. Lyons, L. Wallace, R. Frey, P. J. King, D. Grimmett, Philip Nutzman, A. G. Wiseman, R. Coldwell, D. C. Coyne, Albert Lazzarini, D. Sigg, S. W. Ballmer, Joseph D. Romano, C. King, G. Moreno, Kasem Mossavi, J. G. Rollins, A. Ivanov, W. R. Johnston, David Crooks, P. Csatorday, T. Delker, P. R. Williams, J. Logan, R. K. Nayak, M. V. Plissi, R. Rahkola, Lindon J. Robison, H. Radkins, Michael E Zucker, Helena Armandula, E. J. Elliffe, Hartmut Grote, A. Chandler, S. P. Vyachanin, Kevin M. Ryan, W. Tyler, D. Jungwirth, N. Hindman, P. E. Lindquist, Peter Aufmuth, Marco Aurelio Diaz, A. Parameswaran, V. Chickarmane, Raymond G. Beausoleil, B. Bhawal, R. Balasubramanian, S. J. Berukoff, Badri Krishnan, S. Márka, Antony C. Searle, Kenneth A. Strain, A. Weidner, R. A. Mercer, B. O'Reilly, Frank Seifert, Joseph M. Kovalik, C. Messenger, Morag M. Casey, M. Heurs, B. J. Winjum, W. Hua, B. J. Cusack, S. R. Rao, M. Ashley, Gregory M. Harry, M. Lei, T. Olson, Jolien D. E. Creighton, Lindy Blackburn, Chunglee Kim, A. Khan, V. Sandberg, Virginio Sannibale, David E. McClelland, Adrian C. Ottewill, K. Mailand, Krzysztof Belczynski, R. Mittleman, Nelson Christensen, A. Hartunian, and The LIGO Scientific Collaboration
Subjects: Nuclear and High Energy Physics, MACHO PROJECT, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Primordial black hole, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, Galactic halo, Binary black hole, 0103 physical sciences, 10. No inequality, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Gravitational wave, Astronomy, LIGO, Black hole, Intermediate-mass black hole, Stellar black hole
Abstract: We use data from the second science run of the LIGO gravitational-wave detectors to search for the gravitational waves from primordial black hole (PBH) binary coalescence with component masses in the range 0.2--$1.0 M_\odot$. The analysis requires a signal to be found in the data from both LIGO observatories, according to a set of coincidence criteria. No inspiral signals were found. Assuming a spherical halo with core radius 5 kpc extending to 50 kpc containing non-spinning black holes with masses in the range 0.2--$1.0 M_\odot$, we place an observational upper limit on the rate of PBH coalescence of 63 per year per Milky Way halo (MWH) with 90% confidence., Comment: 7 pages, 4 figures, to be submitted to Phys. Rev. D
Published: 2005

10. Search for gravitational waves from galactic and extra-galactic binary neutron stars

Author: Sanichiro Yoshida, B. F. Whiting, Graham Woan, Robert L. Byer, E. Maros, Stuart Reid, M. Rakhmanov, U. Weiland, E. J. Daw, C. Parameswariah, M. Coles, M. Guenther, Bernard F. Schutz, G. Stapfer, J. Langdale, Sandra E. Wiley, Michael D. Smith, Gabriela Gonzalez, Guido Mueller, J. W C McNabb, David Jones, Patrick Brady, A. Wilson, K. D. Zaleski, Roman Schnabel, D. Churches, Peter R. Saulson, D. Steussy, B. Sears, H. Yamamoto, N. A. Robertson, H. Ding, Vicky Kalogera, A. Rizzi, J. Mason, Alberto Vecchio, J. E. Brau, W. R. Johnston, F. Asiri, S. E. Whitcomb, C. Gray, M. Ito, P. Schwinberg, D. Webber, Carlo Ungarelli, Seiji Kawamura, Reinhard Prix, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, A. Gillespie, J. S. Noel, T. Summerscales, J. R. Smith, S. Klimenko, T. Nash, C. A. Shapiro, Osamu Miyakawa, David H. Reitze, J. Hanson, Y. Hefetz, Gerhard Heinzel, C. Hardham, A. Sazonov, Lindon J. Robison, Benno Willke, Christian J. Killow, D. Rose, R. Desalvo, D. Kozak, W. O. Hamilton, Philippe Grandclément, P. J. Sutton, Kevin M. Carter, Haisheng Rong, C. Aulbert, Scott Koranda, L. Matone, C. A. Cantley, S. Killbourn, J. Castiglione, H. Overmier, P. Charlton, Michael Landry, Helena Armandula, E. J. Elliffe, Benjamin William Allen, R. McCarthy, Karsten Danzmann, M. C. Sumner, A. Ivanov, A. Di Credico, S. B. Anderson, David B. Tanner, James Whelan, L. Zhang, Alessandra Buonanno, Curt Cutler, G. Mendell, M. W. Regehr, V. Re, J. H. Romie, K. Bayer, I. A. Bilenko, S. Nagano, V. Dergachev, Ian Taylor, David J. Ottaway, F. J. Raab, V. Parameshwaraiah, G. Billingsley, H. Radkins, Linqing Wen, S. P. Vyachanin, O. Matherny, M. Pedraza, W. Tyler, B. Lantz, Rainer Weiss, A. Sibley, Maria Alessandra Papa, B. Barr, Shinji Miyoki, S. Chatterji, D. Chin, Peter Fritschel, P. G. Murray, J. Worden, J. A. Giaime, Stanislav Babak, Walid A. Majid, Erika D'Ambrosio, T. Etzel, A. Rüdiger, Duncan A. Brown, D. Redding, M. Malec, P. Hoang, S. Penn, J. H. Hough, Kent Blackburn, Karsten Kötter, Jordan Camp, Pamela J. Russell, S. Richman, Raymond G. Beausoleil, J. D. E. Creighton, I. Salzman, Joseph D. Romano, C. King, R. Balasubramanian, Oliver Jennrich, R. Riesen, J. Zweizig, L. Jones, Michele Zanolin, M. Hrynevych, S. Seel, Roland Schilling, Kasem Mossavi, R. Amin, R. M. S. Schofield, Brent Ware, M. Lubinski, A. S. Sengupta, E. Rotthoff, G. Newton, M. Ashley, K. A. Thorne, M. R. Smith, D. Ugolini, Carsten Fallnich, Stefan Hild, K. Mailand, Kip S. Thorne, R. W.P. Drever, Richard J. Abbott, Benjamin J. Owen, Rana X. Adhikari, Robert Spero, Soumya D. Mohanty, Matthew Evans, L. Cardenas, T. Findley, K. V. Tokmakov, D. Debra, N. Zotov, A. Chandler, D. Coyne, B. Bland, A. M. Gretarsson, V. P. Mitrofanov, M. C. Araya, K. Mason, T. Evans, Yi Pan, Kevin M. Ryan, B. Machenschalk, S. Ray-Majumder, S. E. Seader, A. Heptonstall, D. Cook, D. Ouimette, G. H. Sanders, R. Lawrence, M. Fine, Walter Winkler, Harald Lück, C. N. Colacino, J. Betzwieser, Lindy Blackburn, P. Ehrens, Stephen Fairhurst, A. Lazzarini, Richard J. K. Taylor, Gianpietro Cagnoli, Yi Chen, A. Bullington, M. Hennessy, Q. Z. Shu, L. Bogue, M. A. Barton, Chunglee Kim, G. Traylor, Thomas Corbitt, S. Wise, J. Myers, A. Marin, Akiteru Takamori, V. Sandberg, Suvadeep Bose, K. Y. Franzen, M. Hammond, B. Bochner, E. Messaritaki, Massimo Tinto, Sheila Rowan, S. Meshkov, Kenneth G. Libbrecht, S. Chelkowski, J. Kern, Robert Bennett, Laura Cadonati, K. Kawabe, C. Vorvick, W. Kells, B. J. Cusack, W. G. Anderson, Peter Shawhan, M. Tibbits, B. P. Abbott, T. T. Lyons, S. Vass, Susan M. Scott, Teviet Creighton, Herbert Walther, D. Busby, N. Hepler, X. Siemens, C. Wilkinson, S. R. Rao, A. Bunkowski, A. Ageev, F. Nocera, Jan Harms, G. Moreno, T. Regimbau, C. I. Torrie, Phil Willems, D. M. Strom, A. J. Weinstein, W. Wu, S. Liu, Keisuke Goda, Erik Katsavounidis, Adrian C. Ottewill, Vladimir B. Braginsky, K. Riles, Yousuke Itoh, Krzysztof Belczynski, David Crooks, R. Mittleman, Nelson Christensen, A. Hartunian, N. Hindman, S. Mukherjee, R. Coldwell, D. Sigg, W. W. Johnson, S. W. Ballmer, M. Hewitson, Morag M. Casey, M. Heurs, B. J. Winjum, I. Yakushin, C. Messenger, Guenakh Mitselmakher, M. Lormand, R. Zhu, L. Sievers, W. Hua, Thomas Cokelaer, D. Barker, S. Roddy, Gregory M. Harry, M. Lei, T. Olson, A. M. Sintes, A. Khan, P. Aufmuth, Lee Samuel Finn, Virginio Sannibale, David E. McClelland, M. Barnes, Julien Sylvestre, L. Wallace, R. Frey, P. J. King, D. Grimmett, I. Leonor, Philip Nutzman, A. G. Wiseman, S. Grunewald, J. Logan, R. K. Nayak, R. Rahkola, S. Wen, David H. Shoemaker, K. Reithmaier, F. Mann, J. Heefner, A. Stuver, Andreas Freise, A. Libson, Matthew Pitkin, B. Johnson, J. Chapsky, J. G. Rollins, S. Dhurandhar, M. Mageswaran, R. Wooley, T. Delker, P. R. Williams, H. Tariq, Eric K. Gustafson, I. Zawischa, Badri Krishnan, Antony C. Searle, V. Chickarmane, Frank Seifert, Joseph M. Kovalik, H. Ward, B. Bhawal, Michael E Zucker, S. J. Berukoff, R. Bork, John Veitch, Marco Aurelio Diaz, P. Csatorday, V. V. Frolov, M. MacInnis, A. Parameswaran, M. Fyffe, M. V. Plissi, Peter H. Sneddon, J. Garofoli, Hartmut Grote, K. Rawlins, D. Jungwirth, P. E. Lindquist, S. Márka, Kenneth A. Strain, A. Weidner, R. A. Mercer, C. Torres, B. O'Reilly, C. Barker, B. Rivera, D. Farnham, V. Schmidt, William E. Butler, Martin P McHugh, M. H. P. M. van Putten, S. Tilav, Richard L. Savage, Jeffrey A. Edlund, R. Burgess, Daniel C. Woods, D. I. Robertson, Roy Williams, K. S. Ganezer, K. Watts, Stefan Goßler, R. Gustafson, K. T. Reilly, Kevin C. Schlaufman, Herbert Welling, Nergis Mavalvala, B. C. Barish, A. Grant, Michele Vallisneri, Ik Siong Heng, R. J. Dupuis, and The LIGO Scientific Collaboration
Subjects: Nuclear and High Energy Physics, templates, Andromeda Galaxy, Milky Way, X-ray binary, FOS: Physical sciences, rates, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, FORMS, 01 natural sciences, General Relativity and Quantum Cosmology, EVENTS, SYSTEMS, 0103 physical sciences, Binary star, DETECTORS, ddc:530, TEMPLATES, RATES, LIGO, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, detectors, Physics, inspiraling compact binaries, 010308 nuclear & particles physics, Gravitational wave, Astronomy, Local Group, ligo, PULSARS, Galaxy, pulsars, INSPIRALING COMPACT BINARIES, systems, forms, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, events
Abstract: We use 373 hours ($\approx$ 15 days) of data from the second science run of the LIGO gravitational-wave detectors to search for signals from binary neutron star coalescences within a maximum distance of about 1.5 Mpc, a volume of space which includes the Andromeda Galaxy and other galaxies of the Local Group of galaxies. This analysis requires a signal to be found in data from detectors at the two LIGO sites, according to a set of coincidence criteria. The background (accidental coincidence rate) is determined from the data and is used to judge the significance of event candidates. No inspiral gravitational wave events were identified in our search. Using a population model which includes the Local Group, we establish an upper limit of less than 47 inspiral events per year per Milky Way equivalent galaxy with 90% confidence for non-spinning binary neutron star systems with component masses between 1 and 3 $M_\odot$., 20 pages, 12 figures, to be submitted to Phys. Rev. D
Published: 2005
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11. Upper limits on a stochastic background of gravitational waves

Author: Rana X. Adhikari, Gareth Jones, B. Machenschalk, Keisuke Goda, Walter Winkler, Harald Lück, K. Mailand, Krzysztof Belczynski, R. Mittleman, M. J. Lubinski, M. Ashley, Matthew Pitkin, Nelson Christensen, J. Allen, Vladimir B. Braginsky, Richard O'Shaughnessy, R. Wooley, David Jones, J. Worden, A. Rüdiger, K. Riles, Alberto Vecchio, G. Mendell, Badri Krishnan, R. Riesen, Yousuke Itoh, Antony C. Searle, Peter R. Saulson, U. Weiland, P. J. Sutton, Jolien D. E. Creighton, Roland Schilling, Pankaj Sarin, Laura Cadonati, Lindy Blackburn, C. Messenger, C. Parameswariah, Chunglee Kim, V. Sandberg, A. J. Weinstein, S. Penn, I. Gholami, R. Schofleld, Pamela J. Russell, Teviet Creighton, Soumya D. Mohanty, K. A. Thorne, J. Betzwieser, D. Ugolini, W. Hua, N. Zotov, Richard J. Abbott, A. M. Gretarsson, C. Aulbert, H. Ward, Chad Hanna, E. Messaritaki, M. Fyffe, Sandra E. Wiley, Gabriela Gonzalez, X. Siemens, C. Wilkinson, Michael E Zucker, K. Mason, R. DeSalvo, S. Ray-Majumder, William E. Butler, Sheila Rowan, F. Nocera, S. Liu, A. L. Stuver, Gregory M. Harry, Manuel Luna, John Veitch, T. Regimbau, C. I. Torrie, Richard L. Savage, M. Ito, C. Gray, L. Wallace, L. Zhang, Phil Willems, M. Lei, B. Bland, C. N. Colacino, A. Khan, M. Malec, R. Frey, B. Lantz, Martin P McHugh, P. Charlton, R. S. Amin, A. Di Credico, D. M. Strom, V. V. Frolov, M. H. P. M. van Putten, Virginio Sannibale, David E. McClelland, Marco Aurelio Diaz, S. E. Seader, P. J. King, D. Grimmett, J. E. Brau, Gavin Davies, Subhasish Mitra, A. S. Sengupta, Yi Chen, V. Parameshwaraiah, I. A. Bilenko, V. Dergachev, Daniel C. Woods, Lisa M. Goggin, A. G. Wiseman, David J. Ottaway, D. I. Robertson, D. Chin, Stephen Fairhurst, R. L. Ward, D. C. Coyne, S. Dhurandar, M. A. Barton, Stanislav Babak, Gianpietro Cagnoli, K. S. Ganezer, K. Watts, Duncan A. Brown, Scott Koranda, D.B. DeBra, J. S. Noel, E. Maros, J. H. Romie, K. Bayer, B. Sears, F. J. Raab, S. Meshkov, K. Y. Franzen, L. Matone, Benjamin J. Owen, T. Etzel, Peter Fritschel, David H. Shoemaker, K. C. Cannon, E. Myers, E. Katsavounidis, A. Ivanov, K. Rawlins, D. Barker, R. Gustafson, S. E. Whitcomb, A. Sibley, H. Radkins, J. Myers, P. Schwinberg, K. V. Tokmakov, Nergis Mavalvala, L. Jones, G. Traylor, Shourov Chatterji, Thomas Corbitt, S. P. Vyachanin, D. Webber, Martin Hewitson, S. Roddy, W. Tyler, Vicky Kalogera, B. C. Barish, Suvadeep Bose, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, J. R. Smith, R. Bork, T. Nash, B. Johnson, J. Heefner, R. Balasubramanian, A. M. Sintes, J. Zweizig, Lee Samuel Finn, A. Sazonov, S. M. Scott, M. R. Smith, I. Yakushin, Michele Vallisneri, Juri Agresti, Guenakh Mitselmakher, O. Spjeld, Ik Siong Heng, G. H. Sanders, C. Torres, Thomas Cokelaer, A. Rodriguez, S. Wen, C. Barker, T. Summerscales, P. Hoang, Michael Landry, Soma Mukherjee, Eugeniy E. Mikhailov, D. B. Kozak, C. Vorvick, G. Billingsley, H. Yamamoto, B. F. Whiting, H. Overmier, W. G. Anderson, Sanichiro Yoshida, Peter Shawhan, Graham Woan, B. P. Abbott, D. Sellers, M. Guenther, S. Vass, Patrick Brady, W. Kells, D. Busby, Morag M. Casey, Seiji Kawamura, Reinhard Prix, M. Rakhmanov, Osamu Miyakawa, David H. Reitze, Bernard F. Schutz, S. Wise, S. Grunewald, W. O. Hamilton, Kenneth G. Libbrecht, J. Hanson, Guido Mueller, James Whelan, P. Ajith, J. H. Hough, A. C. Melissinos, Douglas R. Cook, Michele Zanolin, Kevin M. Ryan, C. Hardham, Benno Willke, Robert J. McCarthy, L. Ruet, Alessandra Buonanno, Joseph D. Romano, Kasem Mossavi, R. Taylor, N. Hindman, Helena Armandula, P. Ehrens, K. Wette, Timothy Evans, R. Coldwell, D. Sigg, S. W. Ballmer, G. Moreno, Erika D'Ambrosio, Shantanu Desai, Kip S. Thorne, V. P. Mitrofanov, M. C. Araya, A. Wilson, Albert Lazzarini, C. Robinson, Benjamin William Allen, Karsten Danzmann, I. Leonor, John K. Cannizzo, J. W C McNabb, R. Rahkola, Kevin M. Carter, S. B. Anderson, M. Maclnnis, R. J. Dupuis, David B. Tanner, M. Sung, Vuk Mandic, J. A. Giaime, M. Pedraza, Maria Alessandra Papa, Kent Blackburn, N. A. Robertson, J. Rollins, Carlo Ungarelli, Jordan Camp, J. Dalrymple, Matthew Evans, L. Cardenas, Yi Pan, S. Klimenko, V. Re, Rainer Weiss, R. W. P. Drever, W. W. Johnson, M. Lormand, L. Bogue, J. Garofoli, K. Kawabe, B. Rivera, M. Mageswaran, Hartmut Grote, P. E. Lindquist, B. Bhawal, S. Márka, Kenneth A. Strain, R. A. Mercer, B. O'Reilly, and The LIGO Scientific Collaboration
Subjects: Physics, Gravitational-wave observatory, 010308 nuclear & particles physics, Gravitational wave, Astrophysics (astro-ph), General Physics and Astronomy, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, Upper and lower bounds, General Relativity and Quantum Cosmology, LIGO, Interferometry, Observatory, 0103 physical sciences, 010306 general physics, Gravitational redshift, LIGO Scientific Collaboration
Abstract: The Laser Interferometer Gravitational Wave Observatory (LIGO) has performed a third science run with much improved sensitivities of all three interferometers. We present an analysis of approximately 200 hours of data acquired during this run, used to search for a stochastic background of gravitational radiation. We place upper bounds on the energy density stored as gravitational radiation for three different spectral power laws. For the flat spectrum, our limit of Omega_0, 6 pages, 4 figures
Published: 2005

12. Upper limits on gravitational wave bursts in LIGO's second science run

Author: J. Logan, R. K. Nayak, R. Rahkola, I. Yakushin, Michael E Zucker, R. J. Dupuis, Guenakh Mitselmakher, Manuel Luna, Curt Cutler, Marco Aurelio Diaz, O. Spjeld, R. Zhu, M. C. Araya, A. Wilson, H. Ward, Roy Williams, Y. Hefetz, Gerhard Heinzel, C. Hardham, Benno Willke, T. Findley, Peter Fritschel, D. Ouimette, A. J. Weinstein, W. Wu, Amber Stuver, Sanichiro Yoshida, Graham Woan, Robert L. Byer, Stuart Reid, A. M. Gretarsson, M. Rakhmanov, R. L. Ward, E. Messaritaki, Badri Krishnan, Antony C. Searle, Frank Seifert, Joseph M. Kovalik, K. S. Ganezer, K. Watts, L. Ruet, Albert Lazzarini, E. Rotthoff, Bernard F. Schutz, G. Stapfer, J. Hanson, J. H. Romie, K. C. Cannon, K. Bayer, Sheila Rowan, Stefan Goßler, K. T. Reilly, Seiji Kawamura, Reinhard Prix, Alessandra Buonanno, L. Sievers, John Veitch, Guido Mueller, Morag M. Casey, M. Heurs, Robert J. McCarthy, M. Ito, Shinji Miyoki, B. J. Winjum, S. Wise, S. Grunewald, J. G. Rollins, Thomas Cokelaer, Rana X. Adhikari, Gareth Jones, A. Gillespie, T. Delker, Linqing Wen, Juri Agresti, A. Rizzi, R. Gustafson, B. Machenschalk, Osamu Miyakawa, David H. Reitze, Kevin C. Schlaufman, Kevin M. Carter, A. Grant, S. Liu, M. MacInnis, Herbert Welling, Nergis Mavalvala, C. Aulbert, R. S. Amin, S. Márka, A. Ageev, H. Tariq, T. Summerscales, Christian J. Killow, C. A. Cantley, Pankaj Sarin, A. C. Melissinos, Peter H. Sneddon, Kenneth G. Libbrecht, L. Zhang, Kenneth A. Strain, D. Farnham, Philippe Grandclément, Jan Harms, V. V. Frolov, B. C. Barish, J. Zweizig, V. Parameshwaraiah, Keisuke Goda, C. Robinson, A. Weidner, Benjamin William Allen, Michael Landry, P. J. Sutton, D. Barker, R. A. Mercer, Karsten Danzmann, M. C. Sumner, M. R. Smith, C. A. Shapiro, Adrian C. Ottewill, Joseph D. Romano, C. King, Kasem Mossavi, G. Billingsley, Haisheng Rong, G. Traylor, S. B. Anderson, K. D. Zaleski, R. DeSalvo, David B. Tanner, B. O'Reilly, S. Chelkowski, B. Lantz, Vuk Mandic, Erik Katsavounidis, S. Nagano, J. Garofoli, V. Schmidt, Peter Aufmuth, I. Salzman, K. Mailand, Robert Spero, Soumya D. Mohanty, N. Zotov, K. Mason, S. Roddy, D. Redding, V. Chickarmane, R. M. S. Schofield, Soma Mukherjee, Benjamin J. Owen, J. A. Giaime, Eric K. Gustafson, M. W. Regehr, P. Ehrens, Krzysztof Belczynski, B. F. Whiting, R. Mittleman, Scott Koranda, L. Matone, Sanjeev Dhurandhar, M. J. Lubinski, Thomas Corbitt, S. Meshkov, P. Hoang, Akiteru Takamori, S. Ray-Majumder, M. Sung, Richard L. Savage, R. Bennett, William E. Butler, E. Myers, K. V. Tokmakov, Erika D'Ambrosio, T. T. Lyons, A. Chandler, Nelson Christensen, B. Bhawal, M. Pedraza, K. Wette, A. Hartunian, H. Overmier, D. Chin, Stanislav Babak, Walid A. Majid, C. N. Colacino, Duncan A. Brown, Kevin M. Ryan, A. M. Sintes, Lee Samuel Finn, Vladimir B. Braginsky, Timothy Evans, P. G. Murray, K. Riles, Jeffrey A. Edlund, S. J. Berukoff, K. Kawabe, R. Coldwell, D. Sellers, A. Sibley, Yi Chen, Eugeniy E. Mikhailov, D. B. Kozak, M. Hennessy, Q. Z. Shu, Maria Alessandra Papa, B. Rivera, M. Hrynevych, C. Vorvick, Martin P McHugh, T. Regimbau, C. I. Torrie, A. Heptonstall, D. Sigg, S. W. Ballmer, M. Barnes, Julien Sylvestre, R. Burgess, Daniel C. Woods, M. Mageswaran, J. H. Hough, J. Allen, P. Csatorday, N. Hepler, D. I. Robertson, G. Moreno, W. G. Anderson, M. V. Plissi, Kent Blackburn, K. Reithmaier, L. Wallace, Andreas Freise, I. Leonor, John K. Cannizzo, R. Frey, Shantanu Desai, M. H. P. M. van Putten, A. Libson, S. Tilav, Peter Shawhan, J. Heefner, M. Tibbits, B. P. Abbott, Kip S. Thorne, S. Vass, Douglas R. Cook, David Crooks, Michele Zanolin, S. Seel, M. Coles, Hartmut Grote, M. Guenther, Matthew Pitkin, R. Wooley, P. J. King, D. Grimmett, Philip Nutzman, M. Malec, W. R. Johnston, Phil Willems, W. Kells, M. A. Barton, D. Busby, Brent Ware, Yousuke Itoh, E. Maros, A. G. Wiseman, D. Jungwirth, P. E. Lindquist, E. J. Daw, D. C. Coyne, D.B. DeBra, Michele Vallisneri, V. P. Mitrofanov, I. Zawischa, D. M. Strom, K. Rawlins, Ik Siong Heng, Patrick Brady, Roman Schnabel, N. Hindman, K. Y. Franzen, J. E. Brau, M. Hammond, Walter Winkler, C. Messenger, Subhasish Mitra, Lindon J. Robison, Harald Lück, Helena Armandula, E. J. Elliffe, T. Etzel, A. Bunkowski, W. Hua, M. W.E. Smith, J. Kern, H. Yamamoto, P. R. Williams, Lisa M. Goggin, D. Churches, N. A. Robertson, Gavin Davies, D. Steussy, B. Sears, L. Jones, S. Wen, Laura Cadonati, Vicky Kalogera, Susan M. Scott, Teviet Creighton, Herbert Walther, Gregory M. Harry, F. Raab, A. Marin, M. Lei, X. Siemens, K. Kötter, C. Wilkinson, J. Mason, T. Olson, B. Bochner, David H. Shoemaker, G. H. Sanders, R. Lawrence, P. Schwinberg, F. Nocera, Martin Hewitson, A. Khan, Jordan Camp, Massimo Tinto, Carlo Ungarelli, W. O. Hamilton, J. Dalrymple, D. Webber, Virginio Sannibale, David E. McClelland, S. Penn, S. Killbourn, A. S. Sengupta, Pamela J. Russell, S. Richman, V. Quetschke, James Whelan, F. Mann, C. Torres, Oliver Jennrich, P. Ajith, H. Ding, K. A. Thorne, J. Betzwieser, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, D. Ugolini, Carsten Fallnich, A. Rodriguez, C. Barker, Stefan Hild, J. R. Smith, R. Bork, T. Nash, Matthew Evans, L. Cardenas, Yi Pan, S. Klimenko, B. Johnson, B. J. Cusack, M. Lormand, M. Fine, A. Sazonov, G. Mendell, Richard J. K. Taylor, S. R. Rao, A. Bullington, C. Parameswariah, L. Bogue, J. Chapsky, J. Langdale, G. P. Newton, M. Fyffe, Sandra E. Wiley, Gabriela Gonzalez, M. Ashley, C. Gray, Gianpietro Cagnoli, D. Rose, V. Re, Jolien D. E. Creighton, Lindy Blackburn, Chunglee Kim, V. Sandberg, Rainer Weiss, R. W. P. Drever, W. W. Johnson, A. Ivanov, H. Radkins, S. P. Vyachanin, W. Tyler, Raymond G. Beausoleil, R. Balasubramanian, J. Myers, Shourov Chatterji, Suvadeep Bose, Alberto Vecchio, J. S. Noel, J. Castiglione, P. Charlton, A. Di Credico, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, David Jones, Peter R. Saulson, R. Abbott, B. Bland, U. Weiland, S. E. Seader, Stephen Fairhurst, O. Matherny, B. Barr, J. Worden, A. Rüdiger, R. Riesen, Roland Schilling, F. Asiri, S. E. Whitcomb, and The LIGO Scientific Collaboration
Subjects: Nuclear and High Energy Physics, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, rotational core collapse, General Relativity and Quantum Cosmology, Constant false alarm rate, 0103 physical sciences, DETECTORS, Waveform, ddc:530, ALGORITHM, 010306 general physics, QC, detectors, Physics, algorithm, 010308 nuclear & particles physics, Gravitational wave, Detector, PERFORMANCE, Noise floor, LIGO, SIGNAL, Amplitude, ROTATIONAL CORE COLLAPSE, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, signal, Noise (radio), performance
Abstract: We perform a search for gravitational wave bursts using data from the second science run of the LIGO detectors, using a method based on a wavelet time-frequency decomposition. This search is sensitive to bursts of duration much less than a second and with frequency content in the 100-1100Hz range. It features significant improvements in the instrument sensitivity and in the analysis pipeline with respect to the burst search previously reported by LIGO. Improvements in the search method allow exploring weaker signals, relative to the detector noise floor, while maintaining a low false alarm rate, O(0.1) microHz. The sensitivity in terms of the root-sum-square (rss) strain amplitude lies in the range of hrss~10^{-20} - 10^{-19}/sqrt(Hz) No gravitational wave signals were detected in 9.98 days of analyzed data. We interpret the search result in terms of a frequentist upper limit on the rate of detectable gravitational wave bursts at the level of 0.26 events per day at 90% confidence level. We combine this limit with measurements of the detection efficiency for given waveform morphologies in order to yield rate versus strength exclusion curves as well as to establish order-of-magnitude distance sensitivity to certain modeled astrophysical sources. Both the rate upper limit and its applicability to signal strengths improve our previously reported limits and reflect the most sensitive broad-band search for untriggered and unmodeled gravitational wave bursts to date., 23 pages, 14 figures, to be submitted to Phys Rev D
Published: 2005

13. Search for gravitational waves associated with the gamma ray burst GRB030329 using the LIGO detectors

Author: J. E. Brau, W. R. Johnston, S. Nagano, D. Ouimette, Sanichiro Yoshida, D. Redding, Graham Woan, Robert L. Byer, Stuart Reid, D. Jungwirth, Philippe Grandclément, P. J. Sutton, P. Hoang, Haisheng Rong, Jordan Camp, Lindon J. Robison, C. Messenger, M. Rakhmanov, Peter H. Sneddon, Bernard F. Schutz, G. Stapfer, A. S. Sengupta, Helena Armandula, J. Hanson, G. Newton, Alberto Vecchio, E. J. Elliffe, W. Hua, David H. Shoemaker, Guido Mueller, R. Amin, Darby Kozak, Michael E Zucker, F. Mann, J. Garofoli, B. Johnson, Morag M. Casey, M. Heurs, Marco Aurelio Diaz, Matthew Evans, L. Cardenas, Yi Pan, Albert Lazzarini, J. H. Romie, K. Bayer, T. Findley, Kevin M. Carter, B. J. Winjum, Walter Winkler, J. Chapsky, Shinji Miyoki, Daniel Sigg, F. J. Raab, S. Klimenko, R. Gustafson, A. Chandler, S. B. Anderson, Harald Lück, P. R. Williams, G. Mendell, Kevin M. Ryan, P. Csatorday, Badri Krishnan, Antony C. Searle, Frank Seifert, David B. Tanner, Joseph M. Kovalik, David Jones, J. Cannizzo, Roman Schnabel, D. Farnham, M. W. Regehr, N. Hepler, J. Betzwieser, A. Rizzi, S. Wise, S. Grunewald, M. V. Plissi, A. Marin, J. G. Rollins, S. Chatterji, C. Parameswariah, C. Gray, V. Schmidt, T. Regimbau, T. Summerscales, Peter R. Saulson, William E. Butler, C. I. Torrie, A. Heptonstall, Kenneth G. Libbrecht, M. Malec, A. Ageev, M. Pedraza, J. Langdale, H. Ding, M. Fyffe, T. Delker, David Crooks, K. Kawabe, B. Rivera, B. Bland, D. Churches, J. Zweizig, Jan Harms, M. Ito, Hartmut Grote, M. Lormand, Sandra E. Wiley, M. Fine, C. Vorvick, Gabriela Gonzalez, Maria Alessandra Papa, Massimo Tinto, U. Weiland, M. Mageswaran, Phil Willems, J. Logan, R. K. Nayak, C. A. Shapiro, G. Billingsley, R. Rahkola, Martin P McHugh, M. H. P. M. van Putten, S. Tilav, Richard J. K. Taylor, Gianpietro Cagnoli, A. Bullington, Linqing Wen, S. Penn, M. Hrynevych, Pamela J. Russell, S. Richman, Kent Blackburn, B. Lantz, P. E. Lindquist, L. Bogue, S. Meshkov, S. E. Seader, I. Salzman, W. G. Anderson, T. Etzel, A. L. Stuver, J. S. Noel, Oliver Jennrich, Peter Shawhan, M. Tibbits, B. P. Abbott, K. A. Thorne, Joseph D. Romano, R. M. S. Schofield, N. A. Robertson, N. Hindman, D. M. Strom, Robert Spero, Soumya D. Mohanty, C. Aulbert, H. Ward, Scott Koranda, Benjamin J. Owen, E. Maros, C. King, N. Zotov, S. Vass, D. Ugolini, Carsten Fallnich, Kasem Mossavi, V. Chickarmane, Stefan Hild, L. Matone, Soma Mukherjee, D. Rose, K. V. Tokmakov, Keisuke Goda, F. Asiri, A. M. Gretarsson, J. Myers, K. Mason, P. Ehrens, W. Kells, D. Busby, Martin Hewitson, E. Messaritaki, H. Tariq, P. Schwinberg, B. Bhawal, Sheila Rowan, Sanjeev Dhurandhar, J. Castiglione, K. Rawlins, A. Bunkowski, Erik Katsavounidis, D. Webber, S. Ray-Majumder, Suvadeep Bose, V. Re, M. A. Barton, A. Sibley, H. Yamamoto, R. Bork, Stephen Fairhurst, Timothy Evans, R. Coldwell, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, M. J. Lubinski, D.B. DeBra, P. Charlton, Carlo Ungarelli, Martin M. Fejer, J. R. Smith, Rainer Weiss, R. W. P. Drever, M. R. Smith, S. W. Ballmer, A. Di Credico, T. Nash, O. Matherny, A. Sazonov, C. N. Colacino, Vladimir B. Braginsky, K. Y. Franzen, W. W. Johnson, B. Barr, K. Riles, G. Moreno, Kenneth A. Strain, I. Leonor, A. Weidner, A. Gillespie, J. Worden, Eric K. Gustafson, Laura Cadonati, W. O. Hamilton, I. A. Bilenko, V. Dergachev, Ian Taylor, Yi Chen, M. Hennessy, Q. Z. Shu, M. Hammond, R. A. Mercer, S. Killbourn, A. Rüdiger, B. O'Reilly, David J. Ottaway, John Veitch, S. Wen, T. T. Lyons, James Whelan, R. Riesen, L. Zhang, R. McCarthy, Yousuke Itoh, Susan M. Scott, E. J. Daw, J. Kern, V. V. Frolov, L. Jones, Robert Bennett, Roland Schilling, G. H. Sanders, R. Lawrence, Teviet Creighton, Herbert Walther, V. Parameshwaraiah, C. Torres, A. J. Weinstein, W. Wu, C. Barker, X. Siemens, K. Kötter, P. G. Murray, C. Wilkinson, J. H. Hough, M. Landry, D. Chin, B. Bochner, Stanislav Babak, Walid A. Majid, J. W C McNabb, Richard J. Abbott, Douglas R. Cook, Duncan A. Brown, F. Nocera, Michele Zanolin, S. Seel, A. Grant, S. Liu, Brent Ware, M. MacInnis, Peter Fritschel, G. Traylor, Thomas Corbitt, Akiteru Takamori, S. E. Whitcomb, S. J. Berukoff, K. Reithmaier, Andreas Freise, A. Libson, Matthew Pitkin, R. Wooley, D. Barker, S. Chelkowski, S. Roddy, A. M. Sintes, P. Aufmuth, Lee Samuel Finn, M. Barnes, Julien Sylvestre, L. Wallace, R. Frey, P. J. King, D. Grimmett, Philip Nutzman, A. G. Wiseman, D. C. Coyne, I. Yakushin, Guenakh Mitselmakher, R. Zhu, L. Sievers, Thomas Cokelaer, Y. Hefetz, Gerhard Heinzel, C. Hardham, Benno Willke, Alessandra Buonanno, A. Wilson, C. A. Cantley, Benjamin William Allen, Karsten Danzmann, M. C. Sumner, Erika D'Ambrosio, Kip S. Thorne, V. P. Mitrofanov, M. C. Araya, D. Steussy, B. Sears, Vicky Kalogera, J. Mason, B. F. Whiting, H. Overmier, M. Coles, M. Guenther, Michael D. Smith, Patrick Brady, Seiji Kawamura, J. A. Giaime, Reinhard Prix, Osamu Miyakawa, David H. Reitze, Christian J. Killow, Roy Williams, K. S. Ganezer, K. Watts, Stefan Goßler, K. T. Reilly, Kevin C. Schlaufman, Herbert Welling, Nergis Mavalvala, B. C. Barish, K. D. Zaleski, R. DeSalvo, Adrian C. Ottewill, K. Mailand, Richard L. Savage, Krzysztof Belczynski, Jeffrey A. Edlund, R. Mittleman, R. Burgess, D. I. Robertson, Nelson Christensen, A. Hartunian, J. Heefner, Michele Vallisneri, Ik Siong Heng, S. Márka, R. J. Dupuis, E. Rotthoff, Gregory M. Harry, M. Lei, Rana X. Adhikari, B. Machenschalk, T. Olson, A. Khan, Virginio Sannibale, David E. McClelland, I. Zawischa, Curt Cutler, A. Ivanov, H. Radkins, S. P. Vyachanin, W. Tyler, Raymond G. Beausoleil, R. Balasubramanian, M. Ashley, Jolien D. E. Creighton, Lindy Blackburn, Chunglee Kim, V. Sandberg, B. J. Cusack, S. R. Rao, and The LIGO Scientific Collaboration
Subjects: stars, Nuclear and High Energy Physics, Gravitational-wave observatory, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, Observatory, 0103 physical sciences, emission, ddc:530, 010303 astronomy & astrophysics, QC, curve, unusual supernova, Physics, optical afterglow, 010308 nuclear & particles physics, Gravitational wave, Astrophysics (astro-ph), Astronomy, dynamics, LIGO, core-collapse, explorer, Supernova, Interferometry, grb-030329, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Gamma-ray burst, signal
Abstract: We have performed a search for bursts of gravitational waves associated with the very bright Gamma Ray Burst GRB030329, using the two detectors at the LIGO Hanford Observatory. Our search covered the most sensitive frequency range of the LIGO detectors (approximately 80-2048 Hz), and we specifically targeted signals shorter than 150 ms. Our search algorithm looks for excess correlated power between the two interferometers and thus makes minimal assumptions about the gravitational waveform. We observed no candidates with gravitational wave signal strength larger than a pre-determined threshold. We report frequency dependent upper limits on the strength of the gravitational waves associated with GRB030329. Near the most sensitive frequency region, around 250 Hz, our root-sum-square (RSS) gravitational wave strain sensitivity for optimally polarized bursts was better than h_RSS = 6E-21 Hz^{-1/2}. Our result is comparable to the best published results searching for association between gravitational waves and GRBs., Comment: 18 pages, 9 figures and 3 tables; Updated according to journal reviewer's comments
Published: 2005
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14. Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts

Author: H. Ward, A. Chandler, Kevin M. Ryan, T. Regimbau, Ken'ichi Nakagawa, C. I. Torrie, John Veitch, A. Heptonstall, M. Malec, Jordan Camp, J. Dalrymple, M. Ashley, A. S. Sengupta, Norikatsu Mio, Shinji Miyoki, Jun'ichi Yokoyama, J. Allen, N. Hepler, Akira Okutomi, Phil Willems, D. M. Strom, A. Yamamoto, Jolien D. E. Creighton, Lindy Blackburn, Matthew Evans, L. Cardenas, Yi Pan, Takashi Kuwabara, Richard J. K. Taylor, Gianpietro Cagnoli, Shihori Sakata, C. Aulbert, M. MacInnis, Keita Kawabe, R. S. Amin, Chunglee Kim, Seiji Kawamura, Hiroyuki Nakano, Reinhard Prix, Juri Agresti, A. Rizzi, V. Sandberg, K. Rawlins, A. Bunkowski, Shuzo Takemoto, S. Klimenko, Ryutaro Takahashi, W. R. Johnston, Masa-Katsu Fujimoto, Osamu Miyakawa, David H. Reitze, Christian J. Killow, G. Mendell, J. Myers, Shourov Chatterji, Lindon J. Robison, Helena Armandula, E. J. Elliffe, Suvadeep Bose, A. Ageev, Daisuke Tatsumi, A. Wilson, Kazuyuki Miura, Roy Williams, Kenji Soida, K. S. Ganezer, J. S. Noel, Hiromi Mizusawa, Namio Matsuda, J. Castiglione, Lisa M. Goggin, D. Rose, Hideki Asada, Jan Harms, K. Watts, T. Summerscales, Michael Landry, Roman Schnabel, C. A. Shapiro, Masaru Shibata, Stefan Goßler, K. T. Reilly, Toru Tanji, T. Nakamura, B. F. Whiting, David H. Shoemaker, V. Re, Y. Ogawa, Norihiko Kamikubota, Y. Hefetz, Gerhard Heinzel, C. Hardham, M. R. Smith, Masatake Ohashi, H. Overmier, Robert J. McCarthy, Linqing Wen, Shuichi Sato, Joseph D. Romano, C. King, Shoken M. Miyama, Kasem Mossavi, P. Charlton, A. Di Credico, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, Laura Cadonati, G. Billingsley, D. Sellers, Amber Stuver, Sanichiro Yoshida, A. Ivanov, Y. Saito, J. E. Brau, Subhasish Mitra, D. Churches, P. G. Murray, J. H. Hough, C. Parameswariah, J. Langdale, G. P. Newton, M. Fyffe, Sandra E. Wiley, Gabriela Gonzalez, M. Hrynevych, Peter H. Sneddon, Graham Woan, Zong Hong Zhu, Robert L. Byer, Stuart Reid, Kevin C. Schlaufman, Scott Koranda, Akitoshi Ueda, A. Gillespie, Susan M. Scott, Teviet Creighton, Herbert Welling, F. Mann, Rainer Weiss, Kiminori Kondo, Herbert Walther, Benno Willke, R. W. P. Drever, Nergis Mavalvala, H. Radkins, R. L. Savage, L. Ruet, S. P. Vyachanin, M. Coles, L. Matone, M. Guenther, Yasufumi Kojima, E. Rotthoff, Misao Sasaki, Naoko Ohishi, B. C. Barish, Takaharu Kaneyama, M. Rakhmanov, Michael D. Smith, Bernard F. Schutz, Chad Hanna, G. Stapfer, J. Hanson, C. Torres, A. Rodriguez, S. Meshkov, C. Barker, X. Siemens, K. Kötter, Douglas R. Cook, Michael E Zucker, W. Tyler, Michele Zanolin, S. Seel, C. Wilkinson, G. H. Sanders, R. Lawrence, Mitsuru Musha, W. W. Johnson, B. Johnson, S. Nagano, R. L. Ward, K. D. Zaleski, D. Redding, J. Garofoli, Alessandra Buonanno, R. DeSalvo, Patrick Brady, C. A. Cantley, A. Sibley, Raymond G. Beausoleil, R. Balasubramanian, Ryuichi Fujita, I. Leonor, John K. Cannizzo, C. Robinson, Benjamin William Allen, Alberto Vecchio, M. A. Barton, Rana X. Adhikari, Yoshitaka Nagayama, Guido Mueller, Gareth Jones, B. Machenschalk, R. Rahkola, Pankaj Sarin, Karsten Danzmann, M. C. Sumner, B. Lantz, J. Chapsky, H. Yamamoto, Hideo Iguchi, Tatsuru Yoshida, P. Hoang, Manuel Luna, J. H. Romie, K. Bayer, F. Nocera, F. J. Raab, D.B. DeBra, T. Etzel, K. Y. Franzen, Keisuke Goda, Gavin Davies, Marco G. Tarallo, I. Salzman, D. Farnham, D. Steussy, B. Sears, Akito Araya, V. Schmidt, R. M. S. Schofield, David Jones, Hideaki Kudoh, Benjamin J. Owen, A. M. Gretarsson, Tomiyoshi Haruyama, W. O. Hamilton, R. Gustafson, Erik Katsavounidis, Eugeniy E. Mikhailov, B. J. Cusack, M. Hammond, Kimio Tsubono, Vicky Kalogera, J. Kern, Jeffrey A. Edlund, E. J. Daw, M. J. Lubinski, William E. Butler, D. B. Kozak, E. Myers, K. V. Tokmakov, Takayuki Tomaru, E. Messaritaki, S. Killbourn, Martin Hewitson, Koji Arai, R. Burgess, Daniel C. Woods, B. Rivera, D. Webber, Peter R. Saulson, Hisa-aki Shinkai, L. Jones, M. Lormand, H. Ding, R. Abbott, M. Fine, V. Quetschke, Sheila Rowan, James Whelan, P. Ajith, C. Vorvick, Takashi Uchiyama, Kunihito Ioka, M. Mageswaran, Peter Fritschel, S. Penn, Masao Tokunari, Vladimir B. Braginsky, K. Reithmaier, Andreas Freise, S. R. Rao, Robert Bennett, A. Libson, Marco Aurelio Diaz, D. I. Robertson, Erika D'Ambrosio, Pamela J. Russell, Souichi Telada, Junwei Cao, K. Riles, Martin P McHugh, M. H. P. M. van Putten, S. Tilav, Matthew Pitkin, J. Heefner, Toshitaka Yamazaki, Mayu Katsuki, P. Schwinberg, Yoshihide Kozai, Bangalore Suryanarayana Sathyaprakash, E. Black, Martin M. Fejer, Hideyuki Tagoshi, J. R. Smith, R. Bork, T. Nash, K. C. Cannon, J. Zweizig, R. Wooley, Kazuhiro Hayama, A. Sazonov, J. Mason, Ken-ichi Nakao, W. G. Anderson, K. Oohara, E. Maros, Peter Shawhan, S. Richman, M. Tibbits, B. P. Abbott, Yousuke Itoh, Oliver Jennrich, K. A. Thorne, J. Betzwieser, Kazuaki Kuroda, Koichi Waseda, N. Sato, M. Kawamura, S. Wen, A. Bullington, Michele Vallisneri, I. Zawischa, Robert Spero, Soumya D. Mohanty, Fumiko Kawazoe, D. Ugolini, Carsten Fallnich, Stefan Hild, S. Vass, L. Bogue, A. J. Weinstein, Ik Siong Heng, Shantanu Desai, J. W C McNabb, W. Wu, P. T. Beyersdorf, N. Zotov, W. Kells, Soma Mukherjee, Taketoshi Kasai, K. Mason, Sanjeev Dhurandhar, Kip S. Thorne, Badri Krishnan, Shigemi Otsuka, S. Ray-Majumder, D. Busby, Curt Cutler, T. Findley, C. Gray, Kentaro Somiya, Naoki Seto, D. Ouimette, M. C. Araya, Antony C. Searle, V. V. Frolov, Kevin M. Carter, Frank Seifert, C. N. Colacino, S. B. Anderson, A. Grant, S. Liu, V. Parameshwaraiah, L. Zhang, V. P. Mitrofanov, G. Traylor, Kenji Numata, Masaki Ando, Thomas Corbitt, Akiteru Takamori, Yusaku Hamuro, Joseph M. Kovalik, D. Chin, Stanislav Babak, Walid A. Majid, Yi Chen, M. Hennessy, Q. Z. Shu, David B. Tanner, M. W. Regehr, M. Sung, Duncan A. Brown, S. Wise, S. Grunewald, Brent Ware, Kouichi Sato, M. Pedraza, Maria Alessandra Papa, T. Akutsu, Kenneth G. Libbrecht, Kent Blackburn, N. A. Robertson, Carlo Ungarelli, Walter Winkler, Morag M. Casey, Harald Lück, P. R. Williams, M. Heurs, Toshikazu Suzuki, B. J. Winjum, A. Marin, Yoshio Nishi, A. C. Melissinos, B. Bochner, Massimo Tinto, David Crooks, Philippe Grandclément, P. J. Sutton, Haisheng Rong, Kazuhiro Yamamoto, N. Hindman, Toshifumi Futamase, P. Ehrens, K. Wette, Timothy Evans, R. Coldwell, D. Sigg, S. W. Ballmer, Y. Tsunesada, G. Moreno, J. Logan, R. K. Nayak, Yoshikazu Karasawa, R. J. Dupuis, Youhei Sato, H. Tariq, Shigenori Moriwaki, Vuk Mandic, Ken-ichi Ueda, J. A. Giaime, Katsuaki Kasahara, Eric K. Gustafson, T. T. Lyons, Albert Lazzarini, J. G. Rollins, T. Delker, F. Asiri, S. E. Whitcomb, Adrian C. Ottewill, K. Mailand, Krzysztof Belczynski, R. Mittleman, Kohei Takeno, B. Bland, Nelson Christensen, U. Weiland, Takahiro Tanaka, S. E. Seader, A. Hartunian, Stephen Fairhurst, O. Matherny, B. Barr, J. Worden, A. Rüdiger, Youhei Fujiki, R. Riesen, Roland Schilling, Nobuhiro Tsuda, Gregory M. Harry, M. Lei, I. Yakushin, Hirotaka Takahashi, T. Olson, Keisuke Taniguchi, Guenakh Mitselmakher, A. Khan, Virginio Sannibale, David E. McClelland, O. Spjeld, R. Zhu, Mitsuhiro Fukushima, C. Messenger, W. Hua, L. Sievers, Thomas Cokelaer, Yuriko Yanagi, Aya Sekido, Hideki Ishizuka, D. Barker, S. Chelkowski, S. Roddy, A. M. Sintes, Lee Samuel Finn, M. Barnes, Julien Sylvestre, Yoichi Aso, L. Wallace, R. Frey, S. Márka, Takakazu Shintomi, P. J. King, D. Grimmett, Philip Nutzman, Kenneth A. Strain, A. G. Wiseman, D. C. Coyne, A. Weidner, R. A. Mercer, B. O'Reilly, P. Csatorday, M. V. Plissi, Nobuyuki Kanda, Hartmut Grote, Yukiyoshi Iida, D. Jungwirth, P. E. Lindquist, Peter Aufmuth, V. Chickarmane, B. Bhawal, S. J. Berukoff, Keiko Kokeyama, M. Ito, The LIGO Scientific Collaboration, and TAMA Collaboration
Subjects: Nuclear and High Energy Physics, noise, Frequency band, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, Coincidence, gravitational wave detectors, Coincident, 0103 physical sciences, black-hole coalescences, ddc:530, 010303 astronomy & astrophysics, QC, Physics, 010308 nuclear & particles physics, Gravitational wave, Bandwidth (signal processing), Detector, LIGO, Amplitude, gravitational waves, light interferometry, network, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
Abstract: We report on the first joint search for gravitational waves by the TAMA and LIGO collaborations. We looked for millisecond-duration unmodelled gravitational-wave bursts in 473 hr of coincident data collected during early 2003. No candidate signals were found. We set an upper limit of 0.12 events per day on the rate of detectable gravitational-wave bursts, at 90% confidence level. From simulations, we estimate that our detector network was sensitive to bursts with root-sum-square strain amplitude above approximately 1-3x10^{-19} Hz^{-1/2} in the frequency band 700-2000 Hz. We describe the details of this collaborative search, with particular emphasis on its advantages and disadvantages compared to searches by LIGO and TAMA separately using the same data. Benefits include a lower background and longer observation time, at some cost in sensitivity and bandwidth. We also demonstrate techniques for performing coincidence searches with a heterogeneous network of detectors with different noise spectra and orientations. These techniques include using coordinated signal injections to estimate the network sensitivity, and tuning the analysis to maximize the sensitivity and the livetime, subject to constraints on the background., Comment: 15 pages, 11 figures, to be submitted to Phys Rev D. Updated author list
Published: 2005

15. First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform

Author: A. L. Stuver, B. Lantz, H. Yamamoto, David Crooks, Peter Aufmuth, V. Chickarmane, B. F. Whiting, B. Bhawal, J. S. Noel, S. J. Berukoff, K. D. Zaleski, K. Reithmaier, Andreas Freise, A. Libson, I. Salzman, S. Márka, D. B. Kozak, R. L. Ward, R. DeSalvo, Kenneth A. Strain, A. Weidner, R. A. Mercer, B. O'Reilly, H. Overmier, R. M. S. Schofield, Matthew Pitkin, R. Wooley, P. Csatorday, Alberto Vecchio, Y. Hefetz, Gerhard Heinzel, C. Hardham, Badri Krishnan, I. Leonor, John K. Cannizzo, M. V. Plissi, W. R. Johnston, C. Vorvick, J. Castiglione, Benjamin J. Owen, A. Wilson, Gregory M. Harry, J. H. Romie, Hartmut Grote, Antony C. Searle, M. Lei, D. Sellers, D. Jungwirth, Benno Willke, W. O. Hamilton, P. E. Lindquist, J. Logan, R. K. Nayak, E. Myers, K. Bayer, A. Ageev, K. V. Tokmakov, P. Charlton, A. Di Credico, F. J. Raab, T. Olson, E. Rotthoff, C. A. Shapiro, N. Hindman, R. Rahkola, L. Ruet, M. Coles, M. Guenther, G. Mendell, S. Killbourn, James Whelan, H. Ding, Martin Hewitson, I. A. Bilenko, V. Dergachev, Ian Taylor, Jan Harms, Frank Seifert, A. Khan, Joseph M. Kovalik, Richard L. Savage, Keisuke Goda, W. G. Anderson, Rana X. Adhikari, Virginio Sannibale, David E. McClelland, Alessandra Buonanno, Patrick Brady, Peter Shawhan, Gareth Jones, I. Yakushin, Sanichiro Yoshida, C. Parameswariah, David J. Ottaway, R. Gustafson, Erik Katsavounidis, R. J. Dupuis, B. Machenschalk, M. Tibbits, B. P. Abbott, C. A. Cantley, Adrian C. Ottewill, Lindon J. Robison, H. Tariq, Graham Woan, S. Vass, C. Robinson, M. J. Lubinski, J. Langdale, G. P. Newton, M. Fyffe, Sandra E. Wiley, B. J. Cusack, Robert L. Byer, Stuart Reid, Scott Koranda, Benjamin William Allen, K. Mailand, L. Matone, Morag M. Casey, M. Heurs, Gavin Davies, D. Steussy, B. Sears, D. Rose, B. J. Winjum, Michael E Zucker, M. Rakhmanov, Richard J. K. Taylor, Helena Armandula, E. J. Elliffe, Bernard F. Schutz, Krzysztof Belczynski, R. Mittleman, Nelson Christensen, A. Hartunian, W. Kells, D. Busby, Vicky Kalogera, Gianpietro Cagnoli, Vuk Mandic, S. Meshkov, Karsten Danzmann, M. C. Sumner, Vladimir B. Braginsky, K. Riles, G. Stapfer, H. Ward, A. Sibley, Guenakh Mitselmakher, O. Spjeld, R. Zhu, E. J. Daw, S. R. Rao, J. A. Giaime, Eric K. Gustafson, A. C. Melissinos, J. Hanson, Jeffrey A. Edlund, R. Burgess, Erika D'Ambrosio, Gabriela Gonzalez, Guido Mueller, Manuel Luna, S. Nagano, M. Ashley, V. Re, T. Etzel, T. T. Lyons, D. Redding, O. Matherny, Daniel C. Woods, J. Myers, J. Zweizig, I. Zawischa, J. Allen, N. Hepler, Yousuke Itoh, J. W C McNabb, Robert J. McCarthy, Linqing Wen, Albert Lazzarini, Shourov Chatterji, P. Hoang, Roman Schnabel, Soma Mukherjee, Suvadeep Bose, J. E. Brau, D. I. Robertson, Roy Williams, Rainer Weiss, Philippe Grandclément, P. Ehrens, P. J. Sutton, B. Barr, L. Sievers, P. Schwinberg, R. W. P. Drever, Jolien D. E. Creighton, Shantanu Desai, Haisheng Rong, C. Messenger, Subhasish Mitra, Kip S. Thorne, D. Churches, D. Webber, W. W. Johnson, Robert Spero, Soumya D. Mohanty, J. Mason, Thomas Cokelaer, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, John Veitch, Lindy Blackburn, Chunglee Kim, V. Sandberg, J. Worden, Kevin M. Carter, M. R. Smith, Eugeniy E. Mikhailov, P. G. Murray, T. Regimbau, David Jones, E. Black, M. Barnes, Julien Sylvestre, Martin M. Fejer, J. R. Smith, R. Bork, K. S. Ganezer, W. Hua, T. Findley, S. B. Anderson, Joseph D. Romano, C. King, Kasem Mossavi, D. Ouimette, K. Watts, C. I. Torrie, A. Heptonstall, V. P. Mitrofanov, K. Wette, Juri Agresti, Timothy Evans, A. Rizzi, L. Wallace, R. Coldwell, R. Frey, M. Malec, J. G. Rollins, J. H. Hough, Douglas R. Cook, A. Rüdiger, T. Nash, N. Zotov, K. Mason, Sanjeev Dhurandhar, P. J. King, S. Ray-Majumder, A. Sazonov, M. MacInnis, D. Grimmett, Marco Aurelio Diaz, A. Parameswaran, Philip Nutzman, A. Ivanov, H. Radkins, David B. Tanner, M. Lormand, M. W. Regehr, M. Fine, G. H. Sanders, R. Lawrence, A. M. Gretarsson, Michele Zanolin, D. Sigg, S. W. Ballmer, Peter R. Saulson, T. Delker, A. G. Wiseman, T. Summerscales, G. Moreno, R. S. Amin, Seiji Kawamura, Reinhard Prix, Stefan Goßler, K. T. Reilly, R. Riesen, S. P. Vyachanin, W. Tyler, M. Sung, A. Gillespie, A. Chandler, S. Wise, S. Seel, S. Grunewald, R. Abbott, D. C. Coyne, Michael Landry, Peter H. Sneddon, Roland Schilling, Phil Willems, Raymond G. Beausoleil, R. Balasubramanian, Curt Cutler, E. Messaritaki, Kevin M. Ryan, Osamu Miyakawa, M. Pedraza, A. Bullington, Kevin C. Schlaufman, G. Billingsley, C. N. Colacino, V. V. Frolov, Sheila Rowan, M. C. Araya, D. Barker, Maria Alessandra Papa, Herbert Welling, Kenneth G. Libbrecht, L. Bogue, V. Parameshwaraiah, S. Penn, J. Garofoli, David H. Reitze, Christian J. Killow, Nergis Mavalvala, S. Chelkowski, Pamela J. Russell, S. Richman, A. J. Weinstein, S. Roddy, Oliver Jennrich, Kent Blackburn, W. Wu, B. C. Barish, D. Chin, Stanislav Babak, Walid A. Majid, M. Ito, Yi Chen, K. A. Thorne, J. Betzwieser, J. Heefner, N. A. Robertson, A. M. Sintes, D. Ugolini, M. Hennessy, Q. Z. Shu, Carsten Fallnich, Duncan A. Brown, Lee Samuel Finn, Jordan Camp, Stefan Hild, J. Dalrymple, A. S. Sengupta, D. M. Strom, Brent Ware, A. Grant, S. Liu, K. Kawabe, B. Rivera, L. Zhang, M. Mageswaran, Carlo Ungarelli, Michele Vallisneri, Ik Siong Heng, Walter Winkler, Harald Lück, P. R. Williams, Matthew Evans, L. Cardenas, Yi Pan, S. Klimenko, A. Marin, B. Bochner, Massimo Tinto, B. Bland, U. Weiland, S. E. Seader, Lisa M. Goggin, K. Rawlins, A. Bunkowski, Stephen Fairhurst, M. A. Barton, F. Asiri, S. E. Whitcomb, D.B. DeBra, David H. Shoemaker, K. Y. Franzen, Peter Fritschel, C. Torres, K. C. Cannon, M. Hammond, A. Rodriguez, M. W.E. Smith, J. Kern, L. Jones, C. Barker, Pankaj Sarin, Shinji Miyoki, D. Farnham, C. Aulbert, F. Mann, V. Schmidt, G. Traylor, R. Bennett, William E. Butler, Thomas Corbitt, Akiteru Takamori, Martin P McHugh, M. H. P. M. van Putten, S. Tilav, E. Maros, Laura Cadonati, M. Hrynevych, Susan M. Scott, Teviet Creighton, Herbert Walther, X. Siemens, K. Kötter, C. Wilkinson, F. Nocera, B. Johnson, J. Chapsky, S. Wen, and C. Gray
Subjects: Nuclear and High Energy Physics, Gravitational-wave observatory, interferometer, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, Radio spectrum, General Relativity and Quantum Cosmology, Hough transform, law.invention, precessing neutron-stars, Pulsar, law, 0103 physical sciences, emission, ddc:530, 010306 general physics, QC, Physics, search, detector, 010308 nuclear & particles physics, Gravitational wave, LIGO, geo-600, Neutron star, Amplitude, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
Abstract: We perform a wide parameter space search for continuous gravitational waves over the whole sky and over a large range of values of the frequency and the first spin-down parameter. Our search method is based on the Hough transform, which is a semi-coherent, computationally efficient, and robust pattern recognition technique. We apply this technique to data from the second science run of the LIGO detectors and our final results are all-sky upper limits on the strength of gravitational waves emitted by unknown isolated spinning neutron stars on a set of narrow frequency bands in the range 200-$400 $Hz. The best upper limit on the gravitational wave strain amplitude that we obtain in this frequency range is $4.43\times 10^{-23}$., Comment: 22 pages, 21 figures, to be submitted to Phys. Rev. D
Published: 2005
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16. Limits on gravitational-wave emission from selected pulsars using LIGO data

Author: Peter Aufmuth, Y. Hefetz, Gerhard Heinzel, C. Hardham, V. Chickarmane, C. Gray, Benno Willke, H. Tariq, P. Williams, Alessandra Buonanno, Erika D'Ambrosio, T. Summerscales, D. B. Kozak, K. D. Zaleski, Laura Cadonati, Susan M. Scott, Teviet Creighton, Herbert Walther, C. Torres, X. Siemens, K. Kötter, C. Messenger, B. Bhawal, Peter Fritschel, M. Lormand, M. Fine, G. Traylor, Thomas Corbitt, Akiteru Takamori, C. Vorvick, F. Nocera, Alicia M. Sintes, R. DeSalvo, P. G. Murray, T. Regimbau, C. I. Torrie, A. Heptonstall, G. Billingsley, Phil Willems, A. Bullington, L. Bogue, V. V. Frolov, Kip S. Thorne, R. L. Savage, D. M. Strom, J. A. Giaime, Eric K. Gustafson, J. H. Hough, M. Barnes, Julien Sylvestre, W. Hua, Shuhei Yoshida, D. Farnham, J. Romie, Douglas R. Cook, Walter Winkler, Michael Kramer, L. Matone, V. Parameshwaraiah, F. Asiri, A. M. Gretarsson, B. Lantz, W. G. Anderson, E. Messaritaki, I. Salzman, V. P. Mitrofanov, Michele Zanolin, S. Seel, Keisuke Goda, M. A. Barton, Shigeo Nagano, S. Roddy, N. A. Robertson, F. J. Raab, Harald Lück, W. R. Johnston, Peter Shawhan, Robert Spero, Soumya D. Mohanty, Jeffrey A. Edlund, D. Chin, Stanislav Babak, J. Garofoli, B. F. Whiting, M. Tibbits, B. P. Abbott, Benjamin J. Owen, Sheila Rowan, C. Wilkinson, H. Ward, Erik Katsavounidis, V. Re, Badri Krishnan, V. Sannibale, L. Wallace, R. Burgess, R. Frey, K. V. Tokmakov, William E. Butler, D.B. DeBra, N. Zotov, Albrecht Rüdiger, Antony C. Searle, M. J. Lubinski, A. Wilson, T. T. Lyons, R. Taylor, B. J. Cusack, Duncan A. Brown, Rainer Weiss, K. Y. Franzen, S. Vass, H. Overmier, Martin Hewitson, R. W. P. Drever, Vladimir B. Braginsky, John Worden, A. Ageev, Frank Seifert, Adrian C. Ottewill, D. I. Robertson, Graham Woan, W. W. Johnson, Joseph M. Kovalik, K. Riles, K. Mailand, J. Logan, R. K. Nayak, K. Mason, Robert L. Byer, Stuart Reid, Jan Harms, Martin P McHugh, Brent Ware, Krzysztof Belczynski, M. H. P. M. van Putten, D. Grimmett, Philip Nutzman, M. Hammond, J. Heefner, Sanjeev Dhurandhar, S. Ray-Majumder, W. Kells, D. Busby, C. A. Shapiro, S. Berukoff, Lindon J. Robison, Corey Cutler, H. Yamamoto, R. Mittleman, Nelson Christensen, A. Hartunian, Michael E Zucker, Jordan Camp, R. Rahkola, Yousuke Itoh, Helena Armandula, S. E. Whitcomb, E. J. Elliffe, S. Gossler, T. Findley, S. R. Rao, G. Mendell, J. Kern, M. Rakhmanov, L. Jones, M. Coles, Simon Chelkowski, S. Tilav, Bernard F. Schutz, C. A. Cantley, C. N. Colacino, A. G. Wiseman, G. Stapfer, A. S. Sengupta, G. Newton, J. Hanson, Benjamin William Allen, Robert Bennett, A. J. Weinstein, Karsten Danzmann, M. C. Sumner, W. Wu, John Veitch, Carlo Ungarelli, M. Ashley, M. Landry, Michael D. Smith, Robert J. McCarthy, Linqing Wen, C. Parameswariah, S. Meshkov, M. C. Araya, D. C. Coyne, W. O. Hamilton, Guido Mueller, D. Rose, E. Maros, M. MacInnis, Michele Vallisneri, Ik Siong Heng, Patrick Brady, K. Reithmaier, P. Russell, Andreas Freise, Matthew Evans, L. Cardenas, M. Malec, Scott Koranda, S. Killbourn, S. Márka, James Whelan, Yi Pan, Joseph D. Romano, C. King, Yi Chen, M. Hennessy, Q. Z. Shu, J. Langdale, M. Fyffe, S. Wise, Sandra E. Wiley, Gabriela Gonzalez, A. Grant, S. Liu, P. Schwinberg, A. Libson, Matthew Pitkin, I. Leonor, S. Grunewald, D. Steussy, B. Sears, R. J. Dupuis, Kasem Mossavi, R. Wooley, L. Zhang, Andrew Lyne, S. Klimenko, Marco Aurelio Diaz, Jolien D. E. Creighton, Vicky Kalogera, Shinji Miyoki, V. Schmidt, B. Bochner, K. Bayer, W. Majid, D. Barker, Lindy Blackburn, K. Rawlins, Chunglee Kim, M. Guenther, Gregory M. Harry, E. J. Daw, M. Lei, Roman Schnabel, V. Sandberg, J. E. Brau, Kenneth A. Strain, A. Weidner, Kenneth G. Libbrecht, Albert Lazzarini, R. A. Mercer, Roy Williams, D. Churches, T. Etzel, K. S. Ganezer, A. Chandler, Massimo Tinto, C. Aulbert, I. Zawischa, A. Sibley, S. Wen, Rana X. Adhikari, A. Khan, R. Gustafson, B. Machenschalk, K. Watts, K. T. Reilly, S. Penn, D. Redding, B. O'Reilly, A. Sazonov, David E. McClelland, J. W C McNabb, N. Hepler, R. Zhu, S. Chatterji, A. Ivanov, A. Rizzi, B. Bland, Seiji Kawamura, T. Olson, Reinhard Prix, H. Radkins, U. Weiland, Soma Mukherjee, D. Jungwirth, P. Hoang, S. Richman, Oliver Jennrich, Kevin M. Carter, J. Zweizig, P. Csatorday, S. B. Anderson, Osamu Miyakawa, David H. Reitze, Lee Samuel Finn, A. Marin, David H. Shoemaker, R. Amin, D. Webber, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, E. Black, David B. Tanner, M. W. Regehr, S. P. Vyachanin, W. Tyler, Raymond G. Beausoleil, Kevin C. Schlaufman, Peter H. Sneddon, Herbert Welling, Nergis Mavalvala, Martin M. Fejer, R. Balasubramanian, J. R. Smith, J. Mason, S. E. Seader, R. Bork, Christian J. Killow, T. Nash, K. A. Thorne, J. Betzwieser, D. Ugolini, B. C. Barish, M. V. Plissi, M. Pedraza, T. Delker, Kris Ryan, J. Rollins, Maria Alessandra Papa, I. Yakushin, F. Mann, Kent Blackburn, Alberto Vecchio, Hartmut Grote, Guenakh Mitselmakher, Carsten Fallnich, Stefan Hild, A. Bunkowski, K. Kawabe, B. Rivera, David Jones, M. Hrynevych, B. Johnson, M. Mageswaran, P. E. Lindquist, C. Barker, R. Schofield, M. Ito, L. Sievers, Thomas Cokelaer, Peter R. Saulson, H. Ding, J. Chapsky, R. Abbott, Stephen Fairhurst, A. L. Stuver, O. Matherny, Phil D. C. King, J. S. Noel, J. Castiglione, P. Charlton, M. R. Smith, D. Ouimette, A. Di Credico, B. Barr, I. A. Bilenko, V. Dergachev, Ian Taylor, David J. Ottaway, Philippe Grandclément, P. J. Sutton, Haisheng Rong, R. Riesen, Roland Schilling, G. H. Sanders, R. Lawrence, Gianpietro Cagnoli, J. Myers, Suvadeep Bose, Morag M. Casey, M. Heurs, B. J. Winjum, David Crooks, N. Hindman, E. Rotthoff, P. Ehrens, Timothy Evans, R. Coldwell, D. Sigg, S. W. Ballmer, G. Moreno, A. Gillespie, and The LIGO Scientific Collaboration
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Phase (waves), General Physics and Astronomy, FOS: Physical sciences, Astrophysics, General Relativity and Quantum Cosmology (gr-qc), Gravity waves, Interferometric detectors, Strain limit, 01 natural sciences, General Relativity and Quantum Cosmology, Gravitation, Pulsar, 0103 physical sciences, ddc:530, 010303 astronomy & astrophysics, QC, Pulsars, Physics, 010308 nuclear & particles physics, Gravitational wave, Radio observation, Detector, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Gravitational effects, Astronomy, Gravitational-wave signals, LIGO, Upper limits, Interferometry, Amplitude, Gravitational-wave emission, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Radio pulsars, Coherent multidetector analysis
Abstract: We place direct upper limits on the amplitude of gravitational waves from 28 isolated radio pulsars by a coherent multi-detector analysis of the data collected during the second science run of the LIGO interferometric detectors. These are the first direct upper limits for 26 of the 28 pulsars. We use coordinated radio observations for the first time to build radio-guided phase templates for the expected gravitational wave signals. The unprecedented sensitivity of the detectors allow us to set strain upper limits as low as a few times $10^{-24}$. These strain limits translate into limits on the equatorial ellipticities of the pulsars, which are smaller than $10^{-5}$ for the four closest pulsars., Comment: 6 pages, 2 figures
Published: 2005
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17. A family of filters to search for frequency dependent gravitational wave stochastic backgrounds

Author: Carlo Ungarelli and Alberto Vecchio
Subjects: Physics, Physics and Astronomy (miscellaneous), Gravitational wave, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Laser, Power law, First generation, Spectral line, General Relativity and Quantum Cosmology, law.invention, law, Astronomical interferometer, Statistical physics, Sensitivity (control systems)
Abstract: We consider a three dimensional family of filters based on broken power law spectra to search for gravitational wave stochastic backgrounds in the data from Earth-based laser interferometers. We show that such templates produce the necessary fitting factor for a wide class of cosmological backgrounds and astrophysical foregrounds and that the total number of filters required to search for those signals in the data from first generation laser interferometers operating at the design sensitivity is fairly small, 4 pages, 4 figures, uses iopart.cls, accepted for publications on Classical and Quantum Gravity (Special Issue, Proceedings of Amaldi 2003)
Published: 2003

18. Large-scale curvature and entropy perturbations for multiple interacting fluids

Author: Carlo Ungarelli, Karim A. Malik, and David Wands
Subjects: Physics, Cosmology and Gravitation, Nuclear and High Energy Physics, Energy transfer, Astrophysics (astro-ph), FOS: Physical sciences, Perturbation (astronomy), Curvature perturbation, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Curvature, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Classical mechanics, Adiabatic process, Curvaton
Abstract: We present a gauge-invariant formalism to study the evolution of curvature perturbations in a Friedmann-Robertson-Walker universe filled by multiple interacting fluids. We resolve arbitrary perturbations into adiabatic and entropy components and derive their coupled evolution equations. We demonstrate that perturbations obeying a generalised adiabatic condition remain adiabatic in the large-scale limit, even when one includes energy transfer between fluids. As a specific application we study the recently proposed curvaton model, in which the curvaton decays into radiation. We use the coupled evolution equations to show how an initial isocurvature perturbation in the curvaton gives rise to an adiabatic curvature perturbation after the curvaton decays., 14 pages, latex with revtex, 5 figures; v2 typos corrected; v3 typos corrected, version to appear in Phys. Rev. D
Published: 2003
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19. Early acceleration and adiabatic matter perturbations in a class of dilatonic dark-energy models

Author: Carlo Ungarelli, L. Amendola, D. Tocchini-Valentini, and Maurizio Gasperini
Subjects: Physics, Nuclear and High Energy Physics, Astrophysics (astro-ph), Dark matter, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, String (physics), General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, Supernova, High Energy Physics - Phenomenology (hep-ph), Quantum mechanics, Attractor, Dark energy, Dilaton, Adiabatic process, Effective action, Mathematical physics
Abstract: We estimate the growth of matter perturbations in a class of recently proposed dark-energy models based on the (loop-corrected) gravi-dilaton string effective action, and characterized by a global attractor epoch in which dark-matter and dark-energy density scale with the same effective equation of state. Unlike most dark-energy models, we find that the accelerated phase might start even at redshifts as high as z~5 (thus relaxing the coincidence problem), while still producing at present an acceptable level of matter fluctuations. We also show that such an early acceleration is not in conflict with the recently discovered supernova SN1997ff at z~1.7 . The comparison of the predicted value of sigma_{8} with the observational data provides interesting constraints on the fundamental parameters of the given model of dilaton-dark matter interactions., Comment: 17 pages, 3 figures, uses RevTeX4, corrected some typos
Published: 2003
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20. A late-time transition in the cosmic dark energy?

Author: Carlo Ungarelli, Martin Kunz, Bruce A. Bassett, and Joseph Silk
Subjects: Physics, COSMIC cancer database, Equation of state (cosmology), Astrophysics (astro-ph), Cosmic microwave background, FOS: Physical sciences, Sigma, Astronomy and Astrophysics, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, Omega, Redshift, General Relativity and Quantum Cosmology, Supernova, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), 13. Climate action, Space and Planetary Science, Dark energy
Abstract: We study constraints from the latest CMB, large scale structure (2dF, Abell/ACO, PSCz) and SN1a data on dark energy models with a sharp transition in their equation of state, w(z). Such a transition is motivated by models like vacuum metamorphosis where non-perturbative quantum effects are important at late times. We allow the transition to occur at a specific redshift, z_t, to a final negative pressure -1 < w_f < -1/3. We find that the CMB and supernovae data, in particular, prefer a late-time transition due to the associated delay in cosmic acceleration. The best fits (with 1 sigma errors) to all the data are z_t = 2.0^{+2.2}_{-0.76}, ��_Q = 0.73^{+0.02}_{-0.04} and w_f = -1^{+0.2}., 6 Pages, 5 colour figures, MNRAS style
Published: 2002

21. Condensate cosmology -- dark energy from dark matter

Author: Bruce A. Bassett, Carlo Ungarelli, Martin Kunz, and David Parkinson
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Equation of state (cosmology), Hot dark matter, Dark matter, Astrophysics (astro-ph), Scalar field dark matter, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, General Relativity and Quantum Cosmology (gr-qc), 01 natural sciences, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Dark energy, 010303 astronomy & astrophysics, Light dark matter, Dark fluid, Quintessence
Abstract: Imagine a scenario in which the dark energy forms via the condensation of dark matter at some low redshift. The Compton wavelength therefore changes from small to very large at the transition, unlike quintessence or metamorphosis. We study CMB, large scale structure, supernova and radio galaxy constraints on condensation by performing a 4 parameter likelihood analysis over the Hubble constant and the three parameters associated with Q, the condensate field: Omega_Q, w_f and z_t (energy density and equation of state today, and redshift of transition). Condensation roughly interpolates between Lambda CDM (for large z_t) and sCDM (low z_t) and provides a slightly better fit to the data than Lambda CDM. We confirm that there is no degeneracy in the CMB between H and z_t and discuss the implications of late-time transitions for the Lyman-alpha forest. Finally we discuss the nonlinear phase of both condensation and metamorphosis, which is much more interesting than in standard quintessence models., Comment: 13 pages, 13 colour figures. Final version with discussion of TE cross-correlation spectra for condensation and metamorphosis in light of the WMAP results
Published: 2002
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22. Magnetized gravitational waves

Author: Carlo Ungarelli, Roy Maartens, and Christos G. Tsagas
Subjects: Physics, Nuclear and High Energy Physics, Field (physics), Gravitational wave, Astrophysics (astro-ph), Gaussian surface, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Gravitational acceleration, Astrophysics, General Relativity and Quantum Cosmology, Gravitational energy, Magnetic field, symbols.namesake, Classical mechanics, Gravitational field, symbols, Gravitational redshift
Abstract: We investigate the influence of cosmic magnetic fields on gravitational wave perturbations, and find exact solutions on large scales. We show that a large-scale magnetic field can generate large-scale non-decaying gravitational waves. In the general case where gravitational waves are generated by other mechanisms, a large-scale magnetic field introduces a new decaying tensor mode and modifies the non-decaying mode. The direct effect of the magnetic field is to damp the gravitational waves, while an indirect magneto-curvature effect can either damp or boost the waves. A magnetic field also leads to a breaking of statistical isotropy, and the magnetic imprint on the tensor spectrum in principle provides a means of detecting a primordial field., Comment: Minor changes. To appear in Phys. Rev. D
Published: 2001
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23. Are pre-big-bang models falsifiable by gravitational wave experiments?

Author: Carlo Ungarelli and Alberto Vecchio
Subjects: Big Bang, Physics, Class (set theory), Theoretical physics, Gravitational wave, Frequency band, Detector, Astronomical interferometer, FOS: Physical sciences, String cosmology, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, Free parameter
Abstract: One of the most interesting predictions of string-inspired cosmological models is the presence of a stochastic background of relic gravitational waves in the frequency band accessible to Earth-based detectors. Here we consider a ``minimal'' class of string cosmology models and explore whether they are falsifiable by gravitational wave observations. In particular, we show that, the detectability of the signal depends crucially on the actual values of the model parameters. This feature will enable laser interferometers -- starting from the second generation of detectors -- to place stringent constraints on the theory for a fairly large range of the free parameters of the model., Comment: 4 pages, two eps figures, uses aipproc2.sty. To appear in the Proceedings of the Third Edoardo Amaldi Conference
Published: 2000
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24. Quantum Inhomogeneities in String Cosmology

Author: Alessandra Buonanno, Gabriele Veneziano, Carlo Ungarelli, and Krzysztof A. Meissner
Subjects: High Energy Physics - Theory, Heterotic string theory, Physics, Nuclear and High Energy Physics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), String (physics), General Relativity and Quantum Cosmology, Moduli, Magnetic field, Theoretical physics, Coupling (physics), High Energy Physics::Theory, High Energy Physics - Theory (hep-th), String cosmology, Quantum, Particle Physics - Theory, Quantum fluctuation
Abstract: Within two specific string cosmology scenarios --differing in the way the pre- and post-big bang phases are joined-- we compute the size and spectral slope of various types of cosmologically amplified quantum fluctuations that arise in generic compactifications of heterotic string theory. By further imposing that these perturbations become the dominant source of energy at the onset of the radiation era, we obtain physical bounds on the background's moduli, and discuss the conditions under which both a (quasi-) scale-invariant spectrum of axionic perturbations and sufficiently large seeds for the galactic magnetic fields are generated. We also point out a potential problem with achieving the exit to the radiation era when the string coupling is near its present value., Comment: 30 pages, RevteX, epsfig, 5 figures
Published: 1998

25. Symmetry breaking aspects of the effective Lagrangian for quantum black holes

Author: Alessandra Buonanno, Michele Maggiore, Carlo Ungarelli, and Stefano Foffa
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Degrees of freedom (physics and chemistry), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), ddc:500.2, General Relativity and Quantum Cosmology, Theoretical physics, Goldstone boson, Minkowski space, Symmetry breaking, Translational symmetry, Quantum, Black hole complementarity
Abstract: The physical excitations entering the effective Lagrangian for quantum black holes are related to a Goldstone boson which is present in the Rindler limit and is due to the spontaneous breaking of the translation symmetry of the underlying Minkowski space. This physical interpretation, which closely parallels similar well-known results for the effective stringlike description of flux tubes in QCD, gives a physical insight into the problem of describing the quantum degrees of freedom of black holes. It also suggests that the recently suggested concept of 'black hole complementarity' emerges at the effective Lagrangian level rather than at the fundamental level., 11 pages, Latex,1 figure
Published: 1996

26. Spectrum of relic gravitational waves in string cosmology

Author: Carlo Ungarelli, Alessandra Buonanno, and Michele Maggiore
Subjects: High Energy Physics - Theory, Physics, Nuclear and High Energy Physics, Series (mathematics), Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, Spectrum (functional analysis), Astrophysics (astro-ph), Graviton, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, Spectral line, Cosmology, LIGO, High Energy Physics - Theory (hep-th), String cosmology
Abstract: We compute the spectrum of relic gravitons in a model of string cosmology. In the low- and in the high-frequency limits we reproduce known results. The full spectrum, however, also displays a series of oscillations which could give a characteristic signature at the planned LIGO/VIRGO detectors. For special values of the parameters of the model the signal reaches its maximum already at frequencies accessible to LIGO and VIRGO and it is close to the sensitivity of first generation experiments., Comment: 12 pages, Latex,6 figures
Published: 1996
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27. Effective Lagrangian for Quantum Black Holes

Author: Alessandra Buonanno, Luigi Pilo, Mario Gattobigio, Carlo Ungarelli, and Michele Maggiore
Subjects: Physics, High Energy Physics - Theory, Nuclear and High Energy Physics, Horizon, Astrophysics::High Energy Astrophysical Phenomena, Planck mass, Semiclassical physics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, Black hole, High Energy Physics - Theory (hep-th), General covariance, Scalar field, Entropy (arrow of time), Quantum fluctuation, Mathematical physics
Abstract: We discuss the most general effective Lagrangian obtained from the assumption that the degrees of freedom to be quantized, in a black hole, are on the horizon. The effective Lagrangian depends only on the induced metric and the extrinsic curvature of the (fluctuating) horizon, and the possible operators can be arranged in an expansion in powers of $\mpl/M$, where $\mpl$ is the Planck mass and $M$ the black hole mass. We perform a semiclassical expansion of the action with a formalism which preserves general covariance explicitly. Quantum fluctuations over the classical solutions are described by a single scalar field living in the 2+1 dimensional world-volume swept by the horizon, with a given coupling to the background geometry. We discuss the resulting field theory and we compute the black hole entropy with our formalism., Comment: 24 pages, Latex, Nucl. Phys. B, to appear
Published: 1995
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27 results on '"Carlo Ungarelli"'

1. Search for gravitational-wave bursts in LIGO data from the fourth science run

2. Gravitational waves, inflation and the cosmic microwave background: towards testing the slow-roll paradigm

3. Search for gravitational waves from binary inspirals in S3 and S4 LIGO data

4. All-sky search for periodic gravitational waves in LIGO S4 data

5. Searches for periodic gravitational waves from unknown isolated sources and Scorpius X-1: Results from the second LIGO science run

6. Upper limit map of a background of gravitational waves

7. Search for gravitational waves from binary black hole inspirals in LIGO data

8. Joint LIGO and TAMA300 Search for Gravitational Waves from Inspiralling Neutron Star Binaries

9. Search for gravitational waves from primordial black hole binary coalescences in the galactic halo

10. Search for gravitational waves from galactic and extra-galactic binary neutron stars

11. Upper limits on a stochastic background of gravitational waves

12. Upper limits on gravitational wave bursts in LIGO's second science run

13. Search for gravitational waves associated with the gamma ray burst GRB030329 using the LIGO detectors

14. Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts

15. First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform

16. Limits on gravitational-wave emission from selected pulsars using LIGO data

17. A family of filters to search for frequency dependent gravitational wave stochastic backgrounds

18. Large-scale curvature and entropy perturbations for multiple interacting fluids

19. Early acceleration and adiabatic matter perturbations in a class of dilatonic dark-energy models

20. A late-time transition in the cosmic dark energy?

21. Condensate cosmology -- dark energy from dark matter

22. Magnetized gravitational waves

23. Are pre-big-bang models falsifiable by gravitational wave experiments?

24. Quantum Inhomogeneities in String Cosmology

25. Symmetry breaking aspects of the effective Lagrangian for quantum black holes

26. Spectrum of relic gravitational waves in string cosmology

27. Effective Lagrangian for Quantum Black Holes

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27 results on '"Carlo Ungarelli"'

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