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  1. Article ; Online: State observers and Kalman filtering for high performance vibration isolation systems.

    Beker, M G / Bertolini, A / van den Brand, J F J / Bulten, H J / Hennes, E / Rabeling, D S

    The Review of scientific instruments

    2014  Volume 85, Issue 3, Page(s) 34501

    Abstract: There is a strong scientific case for the study of gravitational waves at or below the lower end of current detection bands. To take advantage of this scientific benefit, future generations of ground based gravitational wave detectors will need to expand ...

    Abstract There is a strong scientific case for the study of gravitational waves at or below the lower end of current detection bands. To take advantage of this scientific benefit, future generations of ground based gravitational wave detectors will need to expand the limit of their detection bands towards lower frequencies. Seismic motion presents a major challenge at these frequencies and vibration isolation systems will play a crucial role in achieving the desired low-frequency sensitivity. A compact vibration isolation system designed to isolate in-vacuum optical benches for Advanced Virgo will be introduced and measurements on this system are used to present its performance. All high performance isolation systems employ an active feedback control system to reduce the residual motion of their suspended payloads. The development of novel control schemes is needed to improve the performance beyond what is currently feasible. Here, we present a multi-channel feedback approach that is novel to the field. It utilizes a linear quadratic regulator in combination with a Kalman state observer and is shown to provide effective suppression of residual motion of the suspended payload. The application of state observer based feedback control for vibration isolation will be demonstrated with measurement results from the Advanced Virgo optical bench suspension system.
    Language English
    Publishing date 2014-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.4866659
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A state observer for the Virgo inverted pendulum.

    Accadia, T / Acernese, F / Astone, P / Ballardin, G / Barone, F / Barsuglia, M / Basti, A / Bauer, Th S / Bebronne, M / Beker, M G / Belletoile, A / Bitossi, M / Bizouard, M A / Blom, M / Bondu, F / Bonelli, L / Bonnand, R / Boschi, V / Bosi, L /
    Bouhou, B / Braccini, S / Bradaschia, C / Branchesi, M / Briant, T / Brillet, A / Brisson, V / Bulik, T / Bulten, H J / Buskulic, D / Buy, C / Cagnoli, G / Calloni, E / Canuel, B / Carbognani, F / Cavalier, F / Cavalieri, R / Cella, G / Cesarini, E / Chaibi, O / Chassande-Mottin, E / Chincarini, A / Chiummo, A / Cleva, F / Coccia, E / Cohadon, P-F / Colacino, C N / Colas, J / Colla, A / Colombini, M / Conte, A / Corsi, A / Coulon, J-P / Cuoco, E / D' Antonio, S / Dattilo, V / Davier, M / Day, R / De Rosa, R / Debreczeni, G / Del Pozzo, W / del Prete, M / Di Fiore, L / Di Lieto, A / Di Paolo Emilio, M / Di Virgilio, A / Dietz, A / Drago, M / Endroczi, G / Fafone, V / Ferrante, I / Fidecaro, F / Fiori, I / Flaminio, R / Forte, L A / Fournier, J-D / Franc, J / Frasca, S / Frasconi, F / Galimberti, M / Gammaitoni, L / Garufi, F / Gáspár, M E / Gemme, G / Genin, E / Gennai, A / Giazotto, A / Gouaty, R / Granata, M / Greverie, C / Guidi, G M / Hayau, J-F / Heidmann, A / Heitmann, H / Hello, P / Jaranowski, P / Kowalska, I / Królak, A / Leroy, N / Letendre, N / Li, T G F / Liguori, N / Lorenzini, M / Loriette, V / Losurdo, G / Majorana, E / Maksimovic, I / Man, N / Mantovani, M / Marchesoni, F / Marion, F / Marque, J / Martelli, F / Masserot, A / Michel, C / Milano, L / Minenkov, Y / Mohan, M / Morgado, N / Morgia, A / Mours, B / Naticchioni, L / Nocera, F / Pagliaroli, G / Palladino, L / Palomba, C / Paoletti, F / Parisi, M / Pasqualetti, A / Passaquieti, R / Passuello, D / Persichetti, G / Piergiovanni, F / Pietka, M / Pinard, L / Poggiani, R / Prato, M / Prodi, G A / Punturo, M / Puppo, P / Rabeling, D S / Rácz, I / Rapagnani, P / Re, V / Regimbau, T / Ricci, F / Robinet, F / Rocchi, A / Rolland, L / Romano, R / Rosińska, D / Ruggi, P / Sassolas, B / Sentenac, D / Sperandio, L / Sturani, R / Swinkels, B / Tacca, M / Taffarello, L / Toncelli, A / Tonelli, M / Torre, O / Tournefier, E / Travasso, F / Vajente, G / van den Brand, J F J / Van den Broeck, C / van der Putten, S / Vasuth, M / Vavoulidis, M / Vedovato, G / Verkindt, D / Vetrano, F / Viceré, A / Vinet, J-Y / Vitale, S / Vocca, H / Ward, R L / Was, M / Yvert, M / Zadroźny, A / Zendri, J-P

    The Review of scientific instruments

    2011  Volume 82, Issue 9, Page(s) 94502

    Abstract: We report an application of Kalman filtering to the inverted pendulum (IP) of the Virgo gravitational wave interferometer. Using subspace method system identification techniques, we calculated a linear mechanical model of Virgo IP from experimental ... ...

    Abstract We report an application of Kalman filtering to the inverted pendulum (IP) of the Virgo gravitational wave interferometer. Using subspace method system identification techniques, we calculated a linear mechanical model of Virgo IP from experimental transfer functions. We then developed a Kalman filter, based on the obtained state space representation, that estimates from open loop time domain data, the state variables of the system. This allows the observation (and eventually control) of every resonance mode of the IP mechanical structure independently.
    Language English
    Publishing date 2011-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.3637466
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: In-vacuum Faraday isolation remote tuning.

    Accadia, T / Acernese, F / Antonucci, F / Aoudia, S / Arun, K G / Astone, P / Ballardin, G / Barone, F / Barsuglia, M / Bauer, Th S / Beker, M G / Bigotta, S / Birindelli, S / Bitossi, M / Bizouard, M A / Blom, M / Boccara, C / Bondu, F / Bonelli, L /
    Bosi, L / Braccini, S / Bradaschia, C / Brillet, A / Brisson / Budzynski, R / Bulik, T / Bulten, H J / Buskulic, D / Cagnoli, G / Calloni, E / Campagna, E / Canuel, B / Carbognani, F / Cavalier, F / Cavalieri, R / Cella, G / Cesarini, E / Chassande-Mottin, E / Chincarini, A / Cleva, F / Coccia, E / Colacino, C N / Colas, J / Colla, A / Colombini, M / Corda, C / Corsi, A / Coulon, J-P / Cuoco, E / D'Antonio, S / Dari, A / Dattilo, V / Davier, M / Day, R / De Rosa, R / del Prete, M / Di Fiore, L / Di Lieto, A / Emilio, M Di Paolo / Di Virgilio, A / Dietz, A / Drago, M / Fafone, V / Ferrante, I / Fidecaro, F / Fiori, I / Flaminio, R / Fournier, J-D / Franc, J / Frasca, S / Frasconi, F / Freise, A / Gammaitoni, L / Garufi, F / Gemme, G / Genin, E / Gennai, A / Giazotto, A / Gouaty, R / Granata, M / Greverie, C / Guidi, G M / Heitmann, H / Hello, P / Hild, S / Huet, D / Jaranowski, P / Kowalska, I / Królak, A / La Penna, P / Leroy, N / Letendre, N / Li, T G F / Lorenzini, M / Loriette, V / Losurdo, G / Mackowski, J M / Majorana, E / Man, N / Mantovani, M / Marchesoni, F / Marion, F / Marque, J / Martelli, F / Masserot, A / Michel, C / Milano, L / Minenkov, Y / Mohan, M / Moreau, J / Morgado, N / Morgia, A / Mosca, S / Moscatelli, V / Mours, B / Neri, I / Nocera, F / Pagliaroli, G / Palladino, L / Palomba, C / Paoletti, F / Pardi, S / Parisi, M / Pasqualetti, A / Passaquieti, R / Passuello, D / Persichetti, G / Pichot, M / Piergiovanni, F / Pietka, M / Pinard, L / Poggiani, R / Prato, M / Prodi, G A / Punturo, M / Puppo, P / Rabaste, O / Rabeling, D S / Rapagnani, P / Re, V / Regimbau, T / Ricci, F / Robinet, F / Rocchi, A / Rolland, L / Romano, R / Rosińska, D / Ruggi, P / Sassolas, B / Sentenac, D / Sturani, R / Swinkels, B / Toncelli, A / Tonelli, M / Tournefier, E / Travasso, F / Trummer, J / Vajentei, G / van den Brand, J F J / van der Putten, S / Vavoulidis, M / Vedovato, G / Verkindt, D / Vetrano, F / Viceré, A / Vinet, J-Y / Vocca, H / Was, M / Yvert, M

    Applied optics

    2010  Volume 49, Issue 25, Page(s) 4780–4790

    Abstract: In-vacuum Faraday isolators (FIs) are used in gravitational wave interferometers to prevent the disturbance caused by light reflected back to the input port from the interferometer itself. The efficiency of the optical isolation is becoming more critical ...

    Abstract In-vacuum Faraday isolators (FIs) are used in gravitational wave interferometers to prevent the disturbance caused by light reflected back to the input port from the interferometer itself. The efficiency of the optical isolation is becoming more critical with the increase of laser input power. An in-vacuum FI, used in a gravitational wave experiment (Virgo), has a 20 mm clear aperture and is illuminated by an almost 20 W incoming beam, having a diameter of about 5 mm. When going in vacuum at 10(-6) mbar, a degradation of the isolation exceeding 10 dB was observed. A remotely controlled system using a motorized lambda=2 waveplate inserted between the first polarizer and the Faraday rotator has proven its capability to restore the optical isolation to a value close to the one set up in air.
    Language English
    Publishing date 2010-09-08
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/ao.49.004780
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Virgo calibration and reconstruction of the gravitational wave strain during VSR1

    The Virgo collaboration / Accadia, T. / Acernese, F. / Antonucci, F. / Aoudia, S. / Arun, K. G. / Astone, P. / Ballardin, G. / Barone, F. / Barsuglia, M. / Bauer, Th. S. / Beker, M. G. / Belletoile, A. / Bigotta, S. / Birindelli, S. / Bitossi, M. / Bizouard, M. A. / Blom, M. / Boccara, C. /
    Bondu, F. / Bonelli, L. / Bonnand, R. / Bosi, L. / Braccini, S. / Bradaschia, C. / Brillet, A. / Brisson, V. / Budzynski, R. / Bulik, T. / Bulten, H. J. / Buskulic, D. / Buy, C. / Cagnoli, G. / Calloni, E. / Campagna, E. / Canuel, B. / Carbognani, F. / Cavalier, F. / Cavalieri, R. / Cella, G. / Cesarini, E. / Chassande-Mottin, E. / Chincarini, A. / Cleva, F. / Coccia, E. / Colacino, C. N. / Colas, J. / Colla, A. / Colombini, M. / Corsi, A. / Coulon, J. -P. / Cuoco, E. / D'Antonio, S. / Dari, A. / Dattilo, V. / Davier, M. / Day, R. / De Rosa, R. / del Prete, M. / Di Fiore, L. / Di Lieto, A. / Emilio, M. Di Paolo / Di Virgilio, A. / Dietz, A. / Drago, M. / Fafone, V. / Ferrante, I. / Fidecaro, F. / Fiori, I. / Flaminio, R. / Fournier, J. -D. / Franc, J. / Frasca, S. / Frasconi, F. / Freise, A. / Galimberti, M. / Gammaitoni, L. / Garufi, F. / Gemme, G. / Genin, E. / Gennai, A. / Giazotto, A. / Gouaty, R. / Granata, M. / Greverie, C. / Guidi, G. M. / Heitmann, H. / Hello, P. / Hild, S. / Huet, D. / Jaranowski, P. / Kowalska, I. / Krolak, A. / Leroy, N. / Letendre, N. / Li, T. G. F. / Lorenzini, M. / Loriette, V. / Losurdo, G. / Mackowski, J. M. / Majorana, E. / Maksimovic, I. / Man, N. / Mantovani, M. / Marchesoni, F. / Marion, F. / Marque, J. / Martelli, F. / Masserot, A. / Michel, C. / Milano, L. / Minenkov, Y. / Mohan, M. / Moreau, J. / Morgado, N. / Morgia, A. / Mosca, S. / Moscatelli, V. / Mours, B. / Neri, I. / Nocera, F. / Pagliaroli, G. / Palladino, L. / Palomba, C. / Paoletti, F. / Pardi, S. / Parisi, M. / Pasqualetti, A. / Passaquieti, R. / Passuello, D. / Persichetti, G. / Pichot, M. / Piergiovanni, F. / Pietka, M. / Pinard, L. / Poggiani, R. / Prato, M. / Prodi, G. A. / Punturo, M. / Puppo, P. / Rabaste, O. / Rabeling, D. S. / Rapagnani, P. / Re, V. / Regimbau, T. / Ricci, F. / Robinet, F. / Rocchi, A. / Rolland, L. / Romano, R. / Rosinska, D. / Ruggi, P. / Sassolas, B. / Sentenac, D. / Sturani, R. / Swinkels, B. / Toncelli, A. / Tonelli, M. / Torre, O. / Tournefier, E. / Travasso, F. / Trummer, J. / Vajente, G. / Brand, J. F. J. van den / van der Putten, S. / Vavoulidis, M. / Vedovato, G. / Verkindt, D. / Vetrano, F. / Vicere, A. / Vinet, J. -Y. / Vocca, H. / Was, M. / Yvert, M.

    2010  

    Abstract: Virgo is a kilometer-length interferometer for gravitational waves detection located near Pisa. Its first science run, VSR1, occured from May to October 2007. The aims of the calibration are to measure the detector sensitivity and to reconstruct the time ...

    Abstract Virgo is a kilometer-length interferometer for gravitational waves detection located near Pisa. Its first science run, VSR1, occured from May to October 2007. The aims of the calibration are to measure the detector sensitivity and to reconstruct the time series of the gravitational wave strain h(t). The absolute length calibration is based on an original non-linear reconstruction of the differential arm length variations in free swinging Michelson configurations. It uses the laser wavelength as length standard. This method is used to calibrate the frequency dependent response of the Virgo mirror actuators and derive the detector in-loop response and sensitivity within ~5%. The principle of the strain reconstruction is highlighted and the h(t) systematic errors are estimated. A photon calibrator is used to check the sign of h(t). The reconstructed h(t) during VSR1 is valid from 10 Hz up to 10 kHz with systematic errors estimated to 6% in amplitude. The phase error is estimated to be 70 mrad below 1.9 kHz and 6 micro-seconds above.

    Comment: 8 pages, 8 figures, proceedings of Amaldi 8 conference, to be published in Journal of Physics Conference Series (JPCS). Second release: correct typos
    Keywords General Relativity and Quantum Cosmology
    Subject code 621
    Publishing date 2010-02-11
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Improved upper limits on the stochastic gravitational-wave background from 2009-2010 LIGO and Virgo data.

    Aasi, J / Abbott, B P / Abbott, R / Abbott, T / Abernathy, M R / Accadia, T / Acernese, F / Ackley, K / Adams, C / Adams, T / Addesso, P / Adhikari, R X / Affeldt, C / Agathos, M / Aggarwal, N / Aguiar, O D / Ain, A / Ajith, P / Alemic, A /
    Allen, B / Allocca, A / Amariutei, D / Andersen, M / Anderson, R / Anderson, S B / Anderson, W G / Arai, K / Araya, M C / Arceneaux, C / Areeda, J / Aston, S M / Astone, P / Aufmuth, P / Aulbert, C / Austin, L / Aylott, B E / Babak, S / Baker, P T / Ballardin, G / Ballmer, S W / Barayoga, J C / Barbet, M / Barish, B C / Barker, D / Barone, F / Barr, B / Barsotti, L / Barsuglia, M / Barton, M A / Bartos, I / Bassiri, R / Basti, A / Batch, J C / Bauchrowitz, J / Bauer, Th S / Behnke, B / Bejger, M / Beker, M G / Belczynski, C / Bell, A S / Bell, C / Bergmann, G / Bersanetti, D / Bertolini, A / Betzwieser, J / Beyersdorf, P T / Bilenko, I A / Billingsley, G / Birch, J / Biscans, S / Bitossi, M / Bizouard, M A / Black, E / Blackburn, J K / Blackburn, L / Blair, D / Bloemen, S / Blom, M / Bock, O / Bodiya, T P / Boer, M / Bogaert, G / Bogan, C / Bond, C / Bondu, F / Bonelli, L / Bonnand, R / Bork, R / Born, M / Boschi, V / Bose, Sukanta / Bosi, L / Bradaschia, C / Brady, P R / Braginsky, V B / Branchesi, M / Brau, J E / Briant, T / Bridges, D O / Brillet, A / Brinkmann, M / Brisson, V / Brooks, A F / Brown, D A / Brown, D D / Brückner, F / Buchman, S / Bulik, T / Bulten, H J / Buonanno, A / Burman, R / Buskulic, D / Buy, C / Cadonati, L / Cagnoli, G / Bustillo, J Calderón / Calloni, E / Camp, J B / Campsie, P / Cannon, K C / Canuel, B / Cao, J / Capano, C D / Carbognani, F / Carbone, L / Caride, S / Castiglia, A / Caudill, S / Cavaglià, M / Cavalier, F / Cavalieri, R / Celerier, C / Cella, G / Cepeda, C / Cesarini, E / Chakraborty, R / Chalermsongsak, T / Chamberlin, S J / Chao, S / Charlton, P / Chassande-Mottin, E / Chen, X / Chen, Y / Chincarini, A / Chiummo, A / Cho, H S / Chow, J / Christensen, N / Chu, Q / Chua, S S Y / Chung, S / Ciani, G / Clara, F / Clark, J A / Cleva, F / Coccia, E / Cohadon, P-F / Colla, A / Collette, C / Colombini, M / Cominsky, L / Constancio, M / Conte, A / Cook, D / Corbitt, T R / Cordier, M / Cornish, N / Corpuz, A / Corsi, A / Costa, C A / Coughlin, M W / Coughlin, S / Coulon, J-P / Countryman, S / Couvares, P / Coward, D M / Cowart, M / Coyne, D C / Coyne, R / Craig, K / Creighton, J D E / Crowder, S G / Cumming, A / Cunningham, L / Cuoco, E / Dahl, K / Canton, T Dal / Damjanic, M / Danilishin, S L / D'Antonio, S / Danzmann, K / Dattilo, V / Daveloza, H / Davier, M / Davies, G S / Daw, E J / Day, R / Dayanga, T / Debreczeni, G / Degallaix, J / Deléglise, S / Del Pozzo, W / Denker, T / Dent, T / Dereli, H / Dergachev, V / De Rosa, R / DeRosa, R T / DeSalvo, R / Dhurandhar, S / Díaz, M / Di Fiore, L / Di Lieto, A / Di Palma, I / Di Virgilio, A / Donath, A / Donovan, F / Dooley, K L / Doravari, S / Dossa, S / Douglas, R / Downes, T P / Drago, M / Drever, R W P / Driggers, J C / Du, Z / Dwyer, S / Eberle, T / Edo, T / Edwards, M / Effler, A / Eggenstein, H / Ehrens, P / Eichholz, J / Eikenberry, S S / Endrőczi, G / Essick, R / Etzel, T / Evans, M / Evans, T / Factourovich, M / Fafone, V / Fairhurst, S / Fang, Q / Farinon, S / Farr, B / Farr, W M / Favata, M / Fehrmann, H / Fejer, M M / Feldbaum, D / Feroz, F / Ferrante, I / Ferrini, F / Fidecaro, F / Finn, L S / Fiori, I / Fisher, R P / Flaminio, R / Fournier, J-D / Franco, S / Frasca, S / Frasconi, F / Frede, M / Frei, Z / Freise, A / Frey, R / Fricke, T T / Fritschel, P / Frolov, V V / Fulda, P / Fyffe, M / Gair, J / Gammaitoni, L / Gaonkar, S / Garufi, F / Gehrels, N / Gemme, G / Genin, E / Gennai, A / Ghosh, S / Giaime, J A / Giardina, K D / Giazotto, A / Gill, C / Gleason, J / Goetz, E / Goetz, R / Gondan, L / González, G / Gordon, N / Gorodetsky, M L / Gossan, S / Gossler, S / Gouaty, R / Gräf, C / Graff, P B / Granata, M / Grant, A / Gras, S / Gray, C / Greenhalgh, R J S / Gretarsson, A M / Groot, P / Grote, H / Grover, K / Grunewald, S / Guidi, G M / Guido, C / Gushwa, K / Gustafson, E K / Gustafson, R / Hammer, D / Hammond, G / Hanke, M / Hanks, J / Hanna, C / Hanson, J / Harms, J / Harry, G M / Harry, I W / Harstad, E D / Hart, M / Hartman, M T / Haster, C-J / Haughian, K / Heidmann, A / Heintze, M / Heitmann, H / Hello, P / Hemming, G / Hendry, M / Heng, I S / Heptonstall, A W / Heurs, M / Hewitson, M / Hild, S / Hoak, D / Hodge, K A / Holt, K / Hooper, S / Hopkins, P / Hosken, D J / Hough, J / Howell, E J / Hu, Y / Huerta, E / Hughey, B / Husa, S / Huttner, S H / Huynh, M / Huynh-Dinh, T / Ingram, D R / Inta, R / Isogai, T / Ivanov, A / Iyer, B R / Izumi, K / Jacobson, M / James, E / Jang, H / Jaranowski, P / Ji, Y / Jiménez-Forteza, F / Johnson, W W / Jones, D I / Jones, R / Jonker, R J G / Ju, L / K, Haris / Kalmus, P / Kalogera, V / Kandhasamy, S / Kang, G / Kanner, J B / Karlen, J / Kasprzack, M / Katsavounidis, E / Katzman, W / Kaufer, H / Kawabe, K / Kawazoe, F / Kéfélian, F / Keiser, G M / Keitel, D / Kelley, D B / Kells, W / Khalaidovski, A / Khalili, F Y / Khazanov, E A / Kim, C / Kim, K / Kim, N / Kim, N G / Kim, Y-M / King, E J / King, P J / Kinzel, D L / Kissel, J S / Klimenko, S / Kline, J / Koehlenbeck, S / Kokeyama, K / Kondrashov, V / Koranda, S / Korth, W Z / Kowalska, I / Kozak, D B / Kremin, A / Kringel, V / Królak, A / Kuehn, G / Kumar, A / Kumar, P / Kumar, R / Kuo, L / Kutynia, A / Kwee, P / Landry, M / Lantz, B / Larson, S / Lasky, P D / Lawrie, C / Lazzarini, A / Lazzaro, C / Leaci, P / Leavey, S / Lebigot, E O / Lee, C-H / Lee, H K / Lee, H M / Lee, J / Leonardi, M / Leong, J R / Le Roux, A / Leroy, N / Letendre, N / Levin, Y / Levine, B / Lewis, J / Li, T G F / Libbrecht, K / Libson, A / Lin, A C / Littenberg, T B / Litvine, V / Lockerbie, N A / Lockett, V / Lodhia, D / Loew, K / Logue, J / Lombardi, A L / Lorenzini, M / Loriette, V / Lormand, M / Losurdo, G / Lough, J / Lubinski, M J / Lück, H / Luijten, E / Lundgren, A P / Lynch, R / Ma, Y / Macarthur, J / Macdonald, E P / MacDonald, T / Machenschalk, B / MacInnis, M / Macleod, D M / Magana-Sandoval, F / Mageswaran, M / Maglione, C / Mailand, K / Majorana, E / Maksimovic, I / Malvezzi, V / Man, N / Manca, G 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    Physical review letters

    2014  Volume 113, Issue 23, Page(s) 231101

    Abstract: Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the Universe that is unavailable through standard ... ...

    Abstract Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the Universe that is unavailable through standard electromagnetic observations, making its study of fundamental importance to understanding the evolution of the Universe. We carry out a search for the stochastic background with the latest data from the LIGO and Virgo detectors. Consistent with predictions from most stochastic gravitational-wave background models, the data display no evidence of a stochastic gravitational-wave signal. Assuming a gravitational-wave spectrum of Ω_{GW}(f)=Ω_{α}(f/f_{ref})^{α}, we place 95% confidence level upper limits on the energy density of the background in each of four frequency bands spanning 41.5-1726 Hz. In the frequency band of 41.5-169.25 Hz for a spectral index of α=0, we constrain the energy density of the stochastic background to be Ω_{GW}(f)<5.6×10^{-6}. For the 600-1000 Hz band, Ω_{GW}(f)<0.14(f/900  Hz)^{3}, a factor of 2.5 lower than the best previously reported upper limits. We find Ω_{GW}(f)<1.8×10^{-4} using a spectral index of zero for 170-600 Hz and Ω_{GW}(f)<1.0(f/1300  Hz)^{3} for 1000-1726 Hz, bands in which no previous direct limits have been placed. The limits in these four bands are the lowest direct measurements to date on the stochastic background. We discuss the implications of these results in light of the recent claim by the BICEP2 experiment of the possible evidence for inflationary gravitational waves.
    Language English
    Publishing date 2014-12-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.113.231101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Search for gravitational waves associated with γ-ray bursts detected by the interplanetary network.

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P / Thorne, K A / Thorne, K S / Thrane, E / Tiwari, V / Tokmakov, K V / Tomlinson, C / Tonelli, M / Torres, C V / Torrie, C I / Travasso, F / Traylor, G / Tse, M / Tshilumba, D / Tuennermann, H / Ugolini, D / Unnikrishnan, C S / Urban, A L / Usman, S A / Vahlbruch, H / Vajente, G / Valdes, G / Vallisneri, M / van Beuzekom, M / van den Brand, J F J / Van Den Broeck, C / van der Sluys, M V / van Heijningen, J / van Veggel, A A / Vass, S / Vasúth, M / Vaulin, R / Vecchio, A / Vedovato, G / Veitch, J / Veitch, P J / Venkateswara, K / Verkindt, D / Vetrano, F / Viceré, A / Vincent-Finley, R / Vinet, J-Y / Vitale, S / Vo, T / Vocca, H / Vorvick, C / Vousden, W D / Vyachanin, S P / Wade, A R / Wade, L / Wade, M / Walker, M / Wallace, L / Walsh, S / Wang, M / Wang, X / Ward, R L / Was, M / Weaver, B / Wei, L-W / Weinert, M / Weinstein, A J / Weiss, R / Welborn, T / Wen, L / Wessels, P / West, M / Westphal, T / Wette, K / Whelan, J T / White, D J / Whiting, B F / Wiesner, K / Wilkinson, C / Williams, K / Williams, L / Williams, R / Williams, T D / Williamson, A R / Willis, J L / Willke, B / Wimmer, M / Winkler, W / Wipf, C C / Wiseman, A G / Wittel, H / Woan, G / Wolovick, N / Worden, J / Wu, Y / Yablon, J / Yakushin, I / Yam, W / Yamamoto, H / Yancey, C C / Yang, H / Yoshida, S / Yvert, M / Zadrożny, A / Zanolin, M / Zendri, J-P / Zhang, Fan / Zhang, L / Zhao, C / Zhu, H / Zhu, X J / Zucker, M E / Zuraw, S / Zweizig, J / Aptekar, R L / Atteia, J L / Cline, T / Connaughton, V / Frederiks, D D / Golenetskii, S V / Hurley, K / Krimm, H A / Marisaldi, M / Pal'shin, V D / Palmer, D / Svinkin, D S / Terada, Y / von Kienlin, A

    Physical review letters

    2014  Volume 113, Issue 1, Page(s) 11102

    Abstract: We present the results of a search for gravitational waves associated with 223 γ-ray bursts (GRBs) detected by the InterPlanetary Network (IPN) in 2005-2010 during LIGO's fifth and sixth science runs and Virgo's first, second, and third science runs. The ...

    Abstract We present the results of a search for gravitational waves associated with 223 γ-ray bursts (GRBs) detected by the InterPlanetary Network (IPN) in 2005-2010 during LIGO's fifth and sixth science runs and Virgo's first, second, and third science runs. The IPN satellites provide accurate times of the bursts and sky localizations that vary significantly from degree scale to hundreds of square degrees. We search for both a well-modeled binary coalescence signal, the favored progenitor model for short GRBs, and for generic, unmodeled gravitational wave bursts. Both searches use the event time and sky localization to improve the gravitational wave search sensitivity as compared to corresponding all-time, all-sky searches. We find no evidence of a gravitational wave signal associated with any of the IPN GRBs in the sample, nor do we find evidence for a population of weak gravitational wave signals associated with the GRBs. For all IPN-detected GRBs, for which a sufficient duration of quality gravitational wave data are available, we place lower bounds on the distance to the source in accordance with an optimistic assumption of gravitational wave emission energy of 10(-2)M⊙c(2) at 150 Hz, and find a median of 13 Mpc. For the 27 short-hard GRBs we place 90% confidence exclusion distances to two source models: a binary neutron star coalescence, with a median distance of 12 Mpc, or the coalescence of a neutron star and black hole, with a median distance of 22 Mpc. Finally, we combine this search with previously published results to provide a population statement for GRB searches in first-generation LIGO and Virgo gravitational wave detectors and a resulting examination of prospects for the advanced gravitational wave detectors.
    Language English
    Publishing date 2014-07-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.113.011102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Constraints on cosmic strings from the LIGO-Virgo gravitational-wave detectors.

    Aasi, J / Abadie, J / Abbott, B P / Abbott, R / Abbott, T / Abernathy, M R / Accadia, T / Acernese, F / Adams, C / Adams, T / Adhikari, R X / Affeldt, C / Agathos, M / Aggarwal, N / Aguiar, O D / Ajith, P / Allen, B / Allocca, A / Amador Ceron, E /
    Amariutei, D / Anderson, R A / Anderson, S B / Anderson, W G / Arai, K / Araya, M C / Arceneaux, C / Areeda, J / Ast, S / Aston, S M / Astone, P / Aufmuth, P / Aulbert, C / Austin, L / Aylott, B E / Babak, S / Baker, P T / Ballardin, G / Ballmer, S W / Barayoga, J C / Barker, D / Barnum, S H / Barone, F / Barr, B / Barsotti, L / Barsuglia, M / Barton, M A / Bartos, I / Bassiri, R / Basti, A / Batch, J / Bauchrowitz, J / Bauer, Th S / Bebronne, M / Behnke, B / Bejger, M / Beker, M G / Bell, A S / Bell, C / Belopolski, I / Bergmann, G / Berliner, J M / Bersanetti, D / Bertolini, A / Bessis, D / Betzwieser, J / Beyersdorf, P T / Bhadbhade, T / Bilenko, I A / Billingsley, G / Birch, J / Bitossi, M / Bizouard, M A / Black, E / Blackburn, J K / Blackburn, L / Blair, D / Blom, M / Bock, O / Bodiya, T P / Boer, M / Bogan, C / Bond, C / Bondu, F / Bonelli, L / Bonnand, R / Bork, R / Born, M / Boschi, V / Bose, S / Bosi, L / Bowers, J / Bradaschia, C / Brady, P R / Braginsky, V B / Branchesi, M / Brannen, C A / Brau, J E / Breyer, J / Briant, T / Bridges, D O / Brillet, A / Brinkmann, M / Brisson, V / Britzger, M / Brooks, A F / Brown, D A / Brown, D D / Brückner, F / Bulik, T / Bulten, H J / Buonanno, A / Buskulic, D / Buy, C / Byer, R L / Cadonati, L / Cagnoli, G / Calderón Bustillo, J / Calloni, E / Camp, J B / Campsie, P / Cannon, K C / Canuel, B / Cao, J / Capano, C D / Carbognani, F / Carbone, L / Caride, S / Castiglia, A / Caudill, S / Cavaglià, M / Cavalier, F / Cavalieri, R / Cella, G / Cepeda, C / Cesarini, E / Chakraborty, R / Chalermsongsak, T / Chao, S / Charlton, P / Chassande-Mottin, E / Chen, X / Chen, Y / Chincarini, A / Chiummo, A / Cho, H S / Chow, J / Christensen, N / Chu, Q / Chua, S S Y / Chung, S / Ciani, G / Clara, F / Clark, D E / Clark, J A / Cleva, F / Coccia, E / Cohadon, P-F / Colla, A / Colombini, M / Constancio, M / Conte, A / Conte, R / Cook, D / Corbitt, T R / Cordier, M / Cornish, N / Corsi, A / Costa, C A / Coughlin, M W / Coulon, J-P / Countryman, S / Couvares, P / Coward, D M / Cowart, M / Coyne, D C / Craig, K / Creighton, J D E / Creighton, T D / Crowder, S G / Cumming, A / Cunningham, L / Cuoco, E / Dahl, K / Dal Canton, T / Damjanic, M / Danilishin, S L / D'Antonio, S / Danzmann, K / Dattilo, V / Daudert, B / Daveloza, H / Davier, M / Davies, G S / Daw, E J / Day, R / Dayanga, T / De Rosa, R / Debreczeni, G / Degallaix, J / Del Pozzo, W / Deleeuw, E / Deléglise, S / Denker, T / Dent, T / Dereli, H / Dergachev, V / DeRosa, R / DeSalvo, R / Dhurandhar, S / Di Fiore, L / Di Lieto, A / Di Palma, I / Di Virgilio, A / Díaz, M / Dietz, A / Dmitry, K / Donovan, F / Dooley, K L / Doravari, S / Drago, M / Drever, R W P / Driggers, J C / Du, Z / Dumas, J-C / Dwyer, S / Eberle, T / Edwards, M / Effler, A / Ehrens, P / Eichholz, J / Eikenberry, S S / Endrőczi, G / Essick, R / Etzel, T / Evans, K / Evans, M / Evans, T / Factourovich, M / Fafone, V / Fairhurst, S / Fang, Q / Farinon, S / Farr, B / Farr, W / Favata, M / Fazi, D / Fehrmann, H / Feldbaum, D / Ferrante, I / Ferrini, F / Fidecaro, F / Finn, L S / Fiori, I / Fisher, R / Flaminio, R / Foley, E / Foley, S / Forsi, E / Fotopoulos, N / Fournier, J-D / Franco, S / Frasca, S / Frasconi, F / Frede, M / Frei, M / Frei, Z / Freise, A / Frey, R / Fricke, T T / Fritschel, P / Frolov, V V / Fujimoto, M-K / Fulda, P / Fyffe, M / Gair, J / Gammaitoni, L / Garcia, J / Garufi, F / Gehrels, N / Gemme, G / Genin, E / Gennai, A / Gergely, L / Ghosh, S / Giaime, J A / Giampanis, S / Giardina, K D / Giazotto, A / Gil-Casanova, S / Gill, C / Gleason, J / Goetz, E / Goetz, R / Gondan, L / González, G / Gordon, N / Gorodetsky, M L / Gossan, S / Goßler, S / Gouaty, R / Graef, C / Graff, P B / Granata, M / Grant, A / Gras, S / Gray, C / Greenhalgh, R J S / Gretarsson, A M / Griffo, C / Groot, P / Grote, H / Grover, K / Grunewald, S / Guidi, G M / Guido, C / Gushwa, K E / Gustafson, E K / Gustafson, R / Hall, B / Hall, E / Hammer, D / Hammond, G / Hanke, M / Hanks, J / Hanna, C / Hanson, J / Harms, J / Harry, G M / Harry, I W / Harstad, E D / Hartman, M T / Haughian, K / Hayama, K / Heefner, J / Heidmann, A / Heintze, M / Heitmann, H / Hello, P / Hemming, G / Hendry, M / Heng, I S / Heptonstall, A W / Heurs, M / Hild, S / Hoak, D / Hodge, K A / Holt, K / Holtrop, M / Hong, T / Hooper, S / Horrom, T / Hosken, D J / Hough, J / Howell, E J / Hu, Y / Hua, Z / Huang, V / Huerta, E A / Hughey, B / Husa, S / Huttner, S H / Huynh, M / Huynh-Dinh, T / Iafrate, J / Ingram, D R / Inta, R / Isogai, T / Ivanov, A / Iyer, B R / Izumi, K / Jacobson, M / James, E / Jang, H / Jang, Y J / Jaranowski, P / Jiménez-Forteza, F / Johnson, W W / Jones, D / Jones, D I / Jones, R / Jonker, R J G / Ju, L / K, Haris / Kalmus, P / Kalogera, V / Kandhasamy, S / Kang, G / Kanner, J B / Kasprzack, M / Kasturi, R / Katsavounidis, E / Katzman, W / Kaufer, H / Kaufman, K / Kawabe, K / Kawamura, S / Kawazoe, F / Kéfélian, F / Keitel, D / Kelley, D B / Kells, W / Keppel, D G / Khalaidovski, A / Khalili, F Y / Khazanov, E A / Kim, B K / Kim, C / Kim, K / Kim, N / Kim, W / Kim, Y-M / King, E J / King, P J / Kinzel, D L / Kissel, J S / Klimenko, S / Kline, J / Koehlenbeck, S / Kokeyama, K / Kondrashov, V / Koranda, S / Korth, W Z / Kowalska, I / Kozak, D / Kremin, A / Kringel, V / Królak, A / Kucharczyk, C / Kudla, S / Kuehn, G / Kumar, A / Kumar, P / Kumar, R / Kurdyumov, R / Kwee, P / Landry, M / Lantz, B / Larson, S / Lasky, P D / Lawrie, C / Lazzarini, A / Le Roux, A / Leaci, P / Lebigot, E O / Lee, C-H / Lee, H K / Lee, H M / Lee, J / Leonardi, M / Leong, J R / Leroy, N / Letendre, N / Levine, B / Lewis, J B / Lhuillier, V / Li, T G F / Lin, A C / Littenberg, T B / Litvine, V / Liu, F / Liu, H / Liu, Y / Liu, Z / Lloyd, D / Lockerbie, N A / Lockett, V / Lodhia, D / Loew, K / Logue, J / Lombardi, A L / Lorenzini, M / Loriette, V / Lormand, M / Losurdo, G / Lough, J / Luan, J / Lubinski, M J / Lück, H / Lundgren, A P / Macarthur, J / Macdonald, E / Machenschalk, B / MacInnis, M / Macleod, D M / Magana-Sandoval, F / Mageswaran, M / Mailand, K / Majorana, E / Maksimovic, I / Malvezzi, V / Man, N / Manca, G M / Mandel, I / Mandic, V / Mangano, V / Mantovani, M / Marchesoni, F / Marion, F / Márka, S / Márka, Z / Markosyan, A / Maros, E / Marque, J / Martelli, F / Martin, I W / Martin, R M / Martinelli, L / Martynov, D / Marx, J N / Mason, K / Masserot, A / Massinger, T J / Matichard, F / Matone, L / Matzner, R A / Mavalvala, N / May, G / Mazumder, N / Mazzolo, G / McCarthy, R / McClelland, D E / McGuire, S C / McIntyre, G / McIver, J / Meacher, D / Meadors, G D / Mehmet, M / Meidam, J / Meier, T / Melatos, A / Mendell, G / Mercer, R A / Meshkov, S / Messenger, C / Meyer, M S / Miao, H / Michel, C / Mikhailov, E E / Milano, L / Miller, J / Minenkov, Y / Mingarelli, C M F / Mitra, S / Mitrofanov, V P / Mitselmakher, G / Mittleman, R / Moe, B / Mohan, M / Mohapatra, S R P / Mokler, F / Moraru, D / Moreno, G / Morgado, N / Mori, T / Morriss, S R / Mossavi, K / Mours, B / Mow-Lowry, C M / Mueller, C L / Mueller, G / Mukherjee, S / Mullavey, A / Munch, J / Murphy, D / Murray, P G / Mytidis, A / Nagy, M F / Nanda Kumar, D / Nardecchia, I / Nash, T / Naticchioni, L / Nayak, R / Necula, V / Nelemans, G / Neri, I / Neri, M / Newton, G / Nguyen, T / Nishida, E / Nishizawa, A / Nitz, A / Nocera, F / Nolting, D / Normandin, M E / Nuttall, L K / Ochsner, E / O'Dell, J / Oelker, E / Ogin, G H / Oh, J J / Oh, S H / Ohme, F / Oppermann, P / O'Reilly, B / Ortega Larcher, W / O'Shaughnessy, R / Osthelder, C / Ott, C D / Ottaway, D J / Ottens, R S / Ou, J / Overmier, H / Owen, B J / Padilla, C / Pai, A / Palomba, C / Pan, Y / Pankow, C / Paoletti, F / Paoletti, R / Papa, M A / Paris, H / Pasqualetti, A / Passaquieti, R / Passuello, D / Pedraza, M / Peiris, P / Penn, S / Perreca, A / Phelps, M / Pichot, M / Pickenpack, M / Piergiovanni, F / Pierro, V / Pinard, L / Pindor, B / Pinto, I M / Pitkin, M / Poeld, J / Poggiani, R / Poole, V / Poux, C / Predoi, V / Prestegard, T / Price, L R / Prijatelj, M / Principe, M / Privitera, S / Prix, R / Prodi, G A / Prokhorov, L / Puncken, O / Punturo, M / Puppo, P / Quetschke, V / Quintero, E / Quitzow-James, R / Raab, F J / Rabeling, D S / Rácz, I / Radkins, H / Raffai, P / Raja, S / Rajalakshmi, G / Rakhmanov, M / Ramet, C / Rapagnani, P / Raymond, V / Re, V / Reed, C M / Reed, T / Regimbau, T / Reid, S / Reitze, D H / Ricci, F / Riesen, R / Riles, K / Robertson, N A / Robinet, F / Rocchi, A / Roddy, S / Rodriguez, C / Rodruck, M / Roever, C / Rolland, L / Rollins, J G / Romano, R / Romanov, G / Romie, J H / Rosińska, D / Rowan, S / Rüdiger, A / Ruggi, P / Ryan, K / Salemi, F / Sammut, L / Sandberg, V / Sanders, J / Sannibale, V / Santiago-Prieto, I / Saracco, E / Sassolas, B / Sathyaprakash, B S / Saulson, P R / Savage, R / Schilling, R / Schnabel, R / Schofield, R M S / Schreiber, E / Schuette, D / Schulz, B / Schutz, B F / Schwinberg, P / Scott, J / Scott, S M / Seifert, F / Sellers, D / Sengupta, A S / Sentenac, D / Sergeev, A / Shaddock, D / Shah, S / Shahriar, M S / Shaltev, M / Shapiro, B / Shawhan, P / Shoemaker, D H / Sidery, T L / Siellez, K / Siemens, X / Sigg, D / Simakov, D / Singer, A / Singer, L / Sintes, A M / Skelton, G R / Slagmolen, B J J / Slutsky, J / Smith, J R / Smith, M R / Smith, R J E / Smith-Lefebvre, N D / Soden, K / Son, E J / Sorazu, B / Souradeep, T / Sperandio, L / Staley, A / Steinert, E / Steinlechner, J / Steinlechner, S / Steplewski, S / Stevens, D / Stochino, A / Stone, R / Strain, K A / Straniero, N / Strigin, S / Stroeer, A S / Sturani, R / Stuver, A L / Summerscales, T Z / Susmithan, S / Sutton, P J / Swinkels, B / Szeifert, G / Tacca, M / Talukder, D / Tang, L / Tanner, D B / Tarabrin, S P / Taylor, R / ter Braack, A P M / Thirugnanasambandam, M P / Thomas, M / Thomas, P / Thorne, K A / Thorne, K S / Thrane, E / Tiwari, V / Tokmakov, K V / Tomlinson, C / Toncelli, A / Tonelli, M / Torre, O / Torres, C V / Torrie, C I / Travasso, F / Traylor, G / Tse, M / Ugolini, D / Unnikrishnan, C S / Vahlbruch, H / Vajente, G / Vallisneri, M / van den Brand, J F J / Van Den Broeck, C / van der Putten, S / van der Sluys, M V / van Heijningen, J / van Veggel, A A / Vass, S / Vasúth, M / Vaulin, R / Vecchio, A / Vedovato, G / Veitch, J / Veitch, P J / Venkateswara, K / Verkindt, D / Verma, S / Vetrano, F / Viceré, A / Vincent-Finley, R / Vinet, J-Y / Vitale, S / Vlcek, B / Vo, T / Vocca, H / Vorvick, C / Vousden, W D / Vrinceanu, D / Vyachanin, S P / Wade, A / Wade, L / Wade, M / Waldman, S J / Walker, M / Wallace, L / Wan, Y / Wang, J / Wang, M / Wang, X / Wanner, A / Ward, R L / Was, M / Weaver, B / Wei, L-W / Weinert, M / Weinstein, A J / Weiss, R / Welborn, T / Wen, L / Wessels, P / West, M / Westphal, T / Wette, K / Whelan, J T / Whitcomb, S E / White, D J / Whiting, B F / Wibowo, S / Wiesner, K / Wilkinson, C / Williams, L / Williams, R / Williams, T / Willis, J L / Willke, B / Wimmer, M / Winkelmann, L / Winkler, W / Wipf, C C / Wittel, H / Woan, G / Worden, J / Yablon, J / Yakushin, I / Yamamoto, H / Yancey, C C / Yang, H / Yeaton-Massey, D / Yoshida, S / Yum, H / Yvert, M / Zadrożny, A / Zanolin, M / Zendri, J-P / Zhang, F / Zhang, L / Zhao, C / Zhu, H / Zhu, X J / Zotov, N / Zucker, M E / Zweizig, J

    Physical review letters

    2014  Volume 112, Issue 13, Page(s) 131101

    Abstract: Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from ... ...

    Abstract Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from cosmic string cusps in data collected by the LIGO and Virgo gravitational wave detectors between 2005 and 2010, with over 625 days of live time. We find no evidence of GW signals from cosmic strings. From this result, we derive new constraints on cosmic string parameters, which complement and improve existing limits from previous searches for a stochastic background of GWs from cosmic microwave background measurements and pulsar timing data. In particular, if the size of loops is given by the gravitational backreaction scale, we place upper limits on the string tension Gμ below 10(-8) in some regions of the cosmic string parameter space.
    Language English
    Publishing date 2014-04-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.112.131101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Directional limits on persistent gravitational waves using LIGO S5 science data.

    Abadie, J / Abbott, B P / Abbott, R / Abernathy, M / Accadia, T / Acernese, F / Adams, C / Adhikari, R / Ajith, P / Allen, B / Allen, G S / Ceron, E Amador / Amin, R S / Anderson, S B / Anderson, W G / Antonucci, F / Arain, M A / Araya, M C / Aronsson, M /
    Arun, K G / Aso, Y / Aston, S M / Astone, P / Atkinson, D / Aufmuth, P / Aulbert, C / Babak, S / Baker, P / Ballardin, G / Ballmer, S / Barker, D / Barnum, S / Barone, F / Barr, B / Barriga, P / Barsotti, L / Barsuglia, M / Barton, M A / Bartos, I / Bassiri, R / Bastarrika, M / Bauchrowitz, J / Bauer, Th S / Behnke, B / Beker, M G / Belletoile, A / Benacquista, M / Bertolini, A / Betzwieser, J / Beveridge, N / Beyersdorf, P T / Bigotta, S / Bilenko, I A / Billingsley, G / Birch, J / Birindelli, S / Biswas, R / Bitossi, M / Bizouard, M A / Black, E / Blackburn, J K / Blackburn, L / Blair, D / Bland, B / Blom, M / Boccara, C / Bock, O / Bodiya, T P / Bondarescu, R / Bondu, F / Bonelli, L / Bonnand, R / Bork, R / Born, M / Bose, S / Bosi, L / Bouhou, B / Boyle, M / Braccini, S / Bradaschia, C / Brady, P R / Braginsky, V B / Brau, J E / Breyer, J / Bridges, D O / Brillet, A / Brinkmann, M / Brisson, V / Britzger, M / Brooks, A F / Brown, D A / Budzyński, R / Bulik, T / Bulten, H J / Buonanno, A / Burguet-Castell, J / Burmeister, O / Buskulic, D / Buy, C / Byer, R L / Cadonati, L / Cagnoli, G / Cain, J / Calloni, E / Camp, J B / Campagna, E / Campsie, P / Cannizzo, J / Cannon, K / Canuel, B / Cao, J / Capano, C / Carbognani, F / Caride, S / Caudill, S / Cavaglià, M / Cavalier, F / Cavalieri, R / Cella, G / Cepeda, C / Cesarini, E / Chalermsongsak, T / Chalkley, E / Charlton, P / Chassande-Mottin, E / Chelkowski, S / Chen, Y / Chincarini, A / Christensen, N / Chua, S S Y / Chung, C T Y / Clark, D / Clark, J / Clayton, J H / Cleva, F / Coccia, E / Colacino, C N / Colas, J / Colla, A / Colombini, M / Conte, R / Cook, D / Corbitt, T R / Cornish, N / Corsi, A / Costa, C A / Coulon, J-P / Coward, D M / Coyne, D C / Creighton, J D E / Creighton, T D / Cruise, A M / Culter, R M / Cumming, A / Cunningham, L / Cuoco, E / Dahl, K / Danilishin, S L / Dannenberg, R / D'Antonio, S / Danzmann, K / Das, K / Dattilo, V / Daudert, B / Davier, M / Davies, G / Davis, A / Daw, E J / 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    Physical review letters

    2011  Volume 107, Issue 27, Page(s) 271102

    Abstract: The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for ... ...

    Abstract The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2-20×10(-50)  strain(2) Hz(-1) and 5-35×10(-49)  strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as ≈7×10(-25) in the most sensitive frequency range near 160 Hz.
    Language English
    Publishing date 2011-12-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.107.271102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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