Showing papers by "C. Aulbert published in 2009"

Search for gravitational-wave bursts in the first year of the fifth LIGO science run

Abstract: We present the results obtained from an all-sky search for gravitational-wave (GW) bursts in the 64– 2000 Hz frequency range in data collected by the LIGO detectors during the first year (November 2005— November 2006) of their fifth science run. The total analyzed live time was 268.6 days. Multiple hierarchical data analysis methods were invoked in this search. The overall sensitivity expressed in terms of the root-sum-square (rss) strain amplitude h_(rss) for gravitational-wave bursts with various morphologies was in the range of 6 x 10^(-22) Hz^(-1/2) to a few x 10^(-21) Hz^(-1/2). No GW signals were observed and a frequentist upper limit of 3.75 events per year on the rate of strong GW bursts was placed at the 90% confidence level. As in our previous searches, we also combined this rate limit with the detection efficiency for selected waveform morphologies to obtain event rate versus strength exclusion curves. In sensitivity, these exclusion curves are the most stringent to date.

Search for gravitational-wave bursts in the first year of the fifth LIGO science run

Abstract: We present the results obtained from an all-sky search for gravitational-wave (GW) bursts in the 64– 2000 Hz frequency range in data collected by the LIGO detectors during the first year (November 2005— November 2006) of their fifth science run. The total analyzed live time was 268.6 days. Multiple hierarchical data analysis methods were invoked in this search. The overall sensitivity expressed in terms of the root-sum-square (rss) strain amplitude h_(rss) for gravitational-wave bursts with various morphologies was in the range of 6 x 10^(-22) Hz^(-1/2) to a few x 10^(-21) Hz^(-1/2). No GW signals were observed and a frequentist upper limit of 3.75 events per year on the rate of strong GW bursts was placed at the 90% confidence level. As in our previous searches, we also combined this rate limit with the detection efficiency for selected waveform morphologies to obtain event rate versus strength exclusion curves. In sensitivity, these exclusion curves are the most stringent to date.

Stacked search for gravitational waves from the 2006 SGR 1900+14 Storm

Abstract: We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking" the GW data around the times of individual soft-gamma bursts in the storm to enhance sensitivity for models in which multiple bursts are accompanied by GW emission. We assume that variation in the time difference between burst electromagnetic emission and potential burst GW emission is small relative to the GW signal duration, and we time-align GW excess power time-frequency tilings containing individual burst triggers to their corresponding electromagnetic emissions. We use two GW emission models in our search: a fluence-weighted model and a flat (unweighted) model for the most electromagnetically energetic bursts. We find no evidence of GWs associated with either model. Model-dependent GW strain, isotropic GW emission energy E GW, and γ ≡ E GW/E EM upper limits are estimated using a variety of assumed waveforms. The stacking method allows us to set the most stringent model-dependent limits on transient GW strain published to date. We find E GW upper limit estimates (at a nominal distance of 10 kpc) of between 2 × 1045 erg and 6 × 1050 erg depending on the waveform type. These limits are an order of magnitude lower than upper limits published previously for this storm and overlap with the range of electromagnetic energies emitted in soft gamma repeater (SGR) giant flares.

Search for gravitational-wave bursts associated with gamma-ray bursts using data from LIGO Science Run 5 and Virgo Science Run 1

Abstract: We present the results of a search for gravitational-wave bursts associated with 137 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments during the fifth LIGO science run and first Virgo science run. The data used in this analysis were collected from 2005 November 4 to 2007 October 1, and most of the GRB triggers were from the Swift satellite. The search uses a coherent network analysis method that takes into account the different locations and orientations of the interferometers at the three LIGO-Virgo sites. We find no evidence for gravitational-wave burst signals associated with this sample of GRBs. Using simulated short-duration (<1 s) waveforms, we set upper limits on the amplitude of gravitational waves associated with each GRB. We also place lower bounds on the distance to each GRB under the assumption of a fixed energy emission in gravitational waves, with typical limits of D ~ 15 Mpc (E_GW^iso / 0.01 M_o c^2)^1/2 for emission at frequencies around 150 Hz, where the LIGO-Virgo detector network has best sensitivity. We present astrophysical interpretations and implications of these results, and prospects for corresponding searches during future LIGO-Virgo runs.

Erratum: All-sky search for periodic gravitational waves in LIGO S4 data

Abstract: B. Abbott, R. Abbott, R. Adhikari, J. Agresti, P. Ajith, B. Allen, R. Amin, S. B. Anderson, W.G. Anderson, M. Arain, M. Araya, H. Armandula, M. Ashley, S. Aston, P. Aufmuth, C. Aulbert, S. Babak, S. Ballmer, H. Bantilan, B. C. Barish, C. Barker, D. Barker, B. Barr, P. Barriga, M.A. Barton, K. Bayer, K. Belczynski, J. Betzwieser, P. T. Beyersdorf, B. Bhawal, I. A. Bilenko, G. Billingsley, R. Biswas, E. Black, K. Blackburn, L. Blackburn, D. Blair, B. Bland, J. Bogenstahl, L. Bogue, R. Bork, V. Boschi, S. Bose, P. R. Brady, V. B. Braginsky, J. E. Brau, M. Brinkmann, A. Brooks, D. A. Brown, A. Bullington, A. Bunkowski, A. Buonanno, O. Burmeister, D. Busby, R. L. Byer, L. Cadonati, G. Cagnoli, J. B. Camp, J. Cannizzo, K. Cannon, C.A. Cantley, J. Cao, L. Cardenas, M.M. Casey, G. Castaldi, C. Cepeda, E. Chalkey, P. Charlton, S. Chatterji, S. Chelkowski, Y. Chen, F. Chiadini, D. Chin, E. Chin, J. Chow, N. Christensen, J. Clark, P. Cochrane, T. Cokelaer, C.N. Colacino, R. Coldwell, R. Conte, D. Cook, T. Corbitt, D. Coward, D. Coyne, J. D. E. Creighton, T. D. Creighton, R. P. Croce, D. R.M. Crooks, A.M. Cruise, A. Cumming, J. Dalrymple, E. D’Ambrosio, K. Danzmann, G. Davies, D. DeBra, J. Degallaix, M. Degree, T. Demma, V. Dergachev, S. Desai, R. DeSalvo, S. Dhurandhar, M. Diaz, J. Dickson, A. Di Credico, G. Diederichs, A. Dietz, E. E. Doomes, R.W. P. Drever, J.-C. Dumas, R. J. Dupuis, J. G. Dwyer, P. Ehrens, E. Espinoza, T. Etzel, M. Evans, T. Evans, S. Fairhurst, Y. Fan, D. Fazi, M.M. Fejer, L. S. Finn, V. Fiumara, N. Fotopoulos, A. Franzen, K.Y. Franzen, A. Freise, R. Frey, T. Fricke, P. Fritschel, V. V. Frolov, M. Fyffe, V. Galdi, J. Garofoli, I. Gholami, J. A. Giaime, S. Giampanis, K.D. Giardina, K. Goda, E. Goetz, L.M. Goggin, G. Gonzalez, S. Gossler, A. Grant, S. Gras, C. Gray, M. Gray, J. Greenhalgh, A.M. Gretarsson, R. Grosso, H. Grote, S. Grunewald, M. Guenther, R. Gustafson, B. Hage, D. Hammer, C. Hanna, J. Hanson, J. Harms, G. Harry, E. Harstad, T. Hayler, J. Heefner, I. S. Heng, A. Heptonstall, M. Heurs, M. Hewitson, S. Hild, E. Hirose, D. Hoak, D. Hosken, J. Hough, E. Howell, D. Hoyland, S. H. Huttner, D. Ingram, E. Innerhofer, M. Ito, Y. Itoh, A. Ivanov, D. Jackrel, B. Johnson, W.W. Johnson, D. I. Jones, G. Jones, R. Jones, L. Ju, P. Kalmus, V. Kalogera, D. Kasprzyk, E. Katsavounidis, K. Kawabe, S. Kawamura, F. Kawazoe, W. Kells, D. G. Keppel, F. Ya. Khalili, C. Kim, P. King, J. S. Kissel, S. Klimenko, K. Kokeyama, V. Kondrashov, R.K. Kopparapu, D. Kozak, B. Krishnan, P. Kwee, P. K. Lam, M. Landry, B. Lantz, A. Lazzarini, B. Lee, M. Lei, J. Leiner, V. Leonhardt, I. Leonor, K. Libbrecht, P. Lindquist, N. A. Lockerbie, M. Longo, M. Lormand, M. Lubinski, H. Luck, B. Machenschalk, M. MacInnis, M. Mageswaran, K. Mailand, M. Malec, V. Mandic, S. Marano, S. Marka, J. Markowitz, E. Maros, I. Martin, J. N. Marx, K. Mason, L. Matone, V. Matta, N. Mavalvala, R. McCarthy, D. E. McClelland, S. C. McGuire, M. McHugh, K. McKenzie, J.W. C. McNabb, S. McWilliams, T. Meier, A. Melissinos, G. Mendell, R. A. Mercer, S. Meshkov, E. Messaritaki, C. J. Messenger, D. Meyers, E. Mikhailov, S. Mitra, V. P. Mitrofanov, G. Mitselmakher, R. Mittleman, O. Miyakawa, S. Mohanty, G. Moreno, K. Mossavi, C. MowLowry, A. Moylan, D. Mudge, G. Mueller, S. Mukherjee, H. Muller-Ebhardt, J. Munch, P. Murray, E. Myers, J. Myers, T. Nash, G. Newton, A. Nishizawa, K. Numata, B. O’Reilly, R. O’Shaughnessy, D. J. Ottaway, H. Overmier, B. J. Owen, Y. Pan, M.A. Papa, V. Parameshwaraiah, P. Patel, M. Pedraza, S. Penn, V. Pierro, I.M. Pinto, M. Pitkin, H. Pletsch, M.V. Plissi, F. Postiglione, R. Prix, V. Quetschke, F. Raab, D. Rabeling, H. Radkins, R. Rahkola, N. Rainer, M. Rakhmanov, M. Ramsunder, K. Rawlins, S. Ray-Majumder, V. Re, H. Rehbein, S. Reid, D. H. Reitze, L. Ribichini, R. Riesen, K. Riles, B. Rivera, N. A. Robertson, C. Robinson, E. L. Robinson, S. Roddy, A. Rodriguez, A.M. Rogan, J. Rollins, J. D. Romano, J. Romie, R. Route, S. Rowan, A. Rudiger, L. Ruet, P. Russell, K. Ryan, S. Sakata, M. Samidi, L. Sancho de la Jordana, V. Sandberg, V. Sannibale, S. Saraf, P. Sarin, B. S. Sathyaprakash, S. Sato, P. R. Saulson, R. Savage, P. Savov, S. Schediwy, R. Schilling, R. Schnabel, R. Schofield, B. F. Schutz, P. Schwinberg, S.M. Scott, A. C. Searle, B. Sears, F. Seifert, D. Sellers, A. S. Sengupta, P. Shawhan, D.H. Shoemaker, A. Sibley, J. A. Sidles, X. Siemens, D. Sigg, S. Sinha, A.M. Sintes, B. J. J. Slagmolen, J. Slutsky, J. R. Smith, M. R. Smith, K. Somiya, K. A. Strain, D.M. Strom, A. Stuver, T. Z. Summerscales, K.-X. Sun, M. Sung, P. J. Sutton, H. Takahashi, D. B. Tanner, M. Tarallo, R. Taylor, R. Taylor, J. Thacker, K. A. Thorne, K. S. Thorne, A. Thuring, K.V. Tokmakov, C. Torres, C. Torrie, G. Traylor, M. Trias, W. Tyler, D. Ugolini, C. Ungarelli, K. Urbanek, H. Vahlbruch, M. Vallisneri, C. Van Den Broeck, M. Varvella, S. Vass, A. Vecchio, J. Veitch, P. Veitch, A. Villar, C. Vorvick, S. P. Vyachanin, S. J. Waldman, L. Wallace, H. Ward, R. Ward, K. Watts, D. Webber, A. Weidner, M. Weinert, A. Weinstein, R. Weiss, S. Wen, K. Wette, J. T. Whelan, D.M. Whitbeck, S. E. Whitcomb, B. F. Whiting, C. Wilkinson, P. A. Willems, L. Williams, B. Willke, I. Wilmut, W. Winkler, C. C. Wipf, S. Wise, A.G. Wiseman, G. Woan, D. Woods, R. Wooley, J. Worden, W. Wu, I. Yakushin, H. Yamamoto, Z. Yan, S. Yoshida, N. Yunes, M. Zanolin, J. Zhang, L. Zhang, C. Zhao, N. Zotov, M. Zucker, H. zur Muhlen, and J. Zweizig (Received 1 December 2009; published 23 December 2009) PHYSICAL REVIEW D 80, 129904(E) (2009)