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Fejer, M. M. Lang, M. Pedraza, M. Pitkin, M. Principe, M. Rakhmanov, M. Ramsunder, M. R. Smith, M. Samidi, M. Sung, M. Trias, M. van der Sluys, M. V. Plissi, M. Weinert, M. Zanolin, M. Zucker, N. A. Lockerbie, N. A. Robertson, N. Christensen, N. D. Smith, N. Fotopoulos, N. Leindecker, N. Mavalvala, N. Rainer, N. Zotov, O. Burmeister, O. Miyakawa, P. Ajith, P. Armor, P. Aufmuth, P. A. Willems, P. Barriga, P. Charlton, P. Ehrens, P. Fritschel, P. J. Sutton, P. Kalmus, P. King, P. K. Lam, P. Kwee, P. Lindquist, P. Lu, P. Murray, P. Patel, P. R. Brady, P. R. Saulson, P. Russell, P. Sarin, P. Savov, P. Schwinberg, P. Shawhan, P. T. Beyersdorf, P. Veitch, R. Abbott, R. Adhikari, R. A. Mercer, R. Amin, R. Biswas, R. Bork, R. Conte, R. DeSalvo, R. Frey, R. Gouaty, R. Grosso, R. Gustafson, R. J. Dupuis, R. Jones, R. J. S. Greenhalgh, R. Khan, R. K. Kopparapu, R. L. Byer, R. Matzner, R. McCarthy, R. M. Cutler, R. Mittleman, R. M. Martin, R. O'Shaughnessy, R. Prix, R. Riesen, R. Route, R. Savage, R. Schilling, R. Schnabel, R. Schofield, R. S. Ottens, R. Stone, R. Taylor, R. Vaulin, R. Ward, R. Weiss, R. Wooley, R. W. P. Drever, S. Aston, S. Babak, S. Ballmer, S. B. Anderson, S. Bose, S. Chatterji, S. Chelkowski, S. C. McGuire, S. Desai, S. Dhurandhar, S. E. Whitcomb, S. Fairhurst, S. Giampanis, S. Gossler, S. Gras, S. Grunewald, S. H. Huttner, S. Hild, S. J. Waldman, S. Kamat, S. Kawamura, S. Klimenko, S. M\\'arka, S. Meshkov, S. Mitra, S. Mohanty, S. M. Scott, S. Mukherjee, S. Penn, S. P. Vyachanin, S. Reid, S. Roddy, S. Rowan, S. Sakata, S. Saraf, S. Sato, S. Sinha, S. Vass, S. Wen, S. W. Schediwy, S. Yoshida, T. Casebolt, T. Cokelaer, T. Corbitt, T. Etzel, T. Evans, T. Fricke, T. Hayler, The LIGO Scientific Collaboration: B. Abbott, T. Meier, T. Nash, T. P. Bodiya, T. Petrie, T. Z. Summerscales, V. B. Braginsky, V. Boschi, V. Dergachev, V. Kalogera, V. Kondrashov, V. Leonhardt, V. Mandic, V. Parameshwaraiah, V. P. Mitrofanov, V. Quetschke, V. Sandberg, V. Sannibale, V. V. Frolov, W. G. Anderson, W. Kells, W. Tyler, W. Winkler, W. W. Johnson, W. Wu, X. Siemens, Y. Aso, Y. Chen, Y. Fan, Y. Pan, Z. M\\'arka, Z. Yan","submitted_at":"2008-05-30T13:50:08Z","abstract_excerpt":"We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravitational-wave Observatory (LIGO). These limits are based on two searches. In the first we assume that the gravitational wave emission follows the observed radio timing, giving an upper limit on gravitational wave emission that beats indirect limits inferred from the spin-down and braking index of the pulsar and the energetics of the nebula. 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Brooks, A. Bullington, A. Buonanno, A. C. Searle, A. Cumming, A. Dietz, A. Effler, A. Freise, \\^AG. Jones, A. Grant, A. G. Wiseman, A. Heptonstall, A. Ivanov, A. Lazzarini, A. Lucianetti, A. Markosyan, A. Melissinos, A. M. Gretarsson, A. M. Rogan, A. M. Sintes, A. Nishizawa, A. Perreca, A. Rodriguez, A. R\\\"udiger, A. Sibley, A. S. Sengupta, A. Stochino, A. Stuver, A. Th\\\"uring, A. Vecchio, A. Villar, A. Weinstein, B. Allen, B. Barr, B. Bland, B. C. Barish, B. F. Schutz, B. F. Whiting, B. Hage, B. J. J. Slagmolen, B. Johnson, B. J. Owen, B. Krishnan, B. Lantz, B. Machenschalk, B. Moe, B. O'Reilly, B. Rivera, B. Sears, B. Sorazu, B. S. Sathyaprakash, B. Willke, C. Aulbert, C. Barker, C. Cepeda, C. C. Wipf, C. Echols, C. Gray, C. Hanna, C. J. Messenger, C. Kim, C. MowLowry, C. Pankow, C. Robinson, C. Torres, C. Torrie, C. Van Den Broeck, C. Vorvick, C. Wilkinson, C. Zhao, D. A. Brown, D. Barker, D. Blair, D. B. Tanner, D. Clark, D. Cook, D. Coyne, D. DeBra, D. E. McClelland, D. Fazi, D. G. Keppel, D. Hammer, D. Hoak, D. Hosken, D. H. Reitze, D. H. Shoemaker, D. I. Jones, D. Ingram, D. J. Ottaway, D. Kasprzyk, D. Kozak, D. Lodhia, D. Mckechan, D. Meyers, D. M. Strom, D. Sellers, D. Sigg, D. S. Rabeling, D. Ugolini, E. Black, E. Chalkley, E. E. Doomes, E. Espinoza, E. Goetz, E. Harstad, E. Hirose, E. Katsavounidis, E. K. Gustafson, E. Khazanov, E. L. Robinson, E. Maros, E. Myers, F. Donovan, F. Grimaldi, F. Kawazoe, F. Matichard, F. Postiglione, F. Raab, F. Seifert, F. Ya. Khalili, G. Allen, G. Billingsley, G. Brunet, G. Cagnoli, G. Castaldi, G. Davies, G. Gonz\\'alez, G. Harry, G. McIntyre, G. McIvor, G. Mendell, G. Mitselmakher, G. Moreno, G. Mueller, G. Newton, G. Ogin, G. Santostasi, G. Traylor, G. Woan, H. Armandula, H. Bantilan, H. Fehrmann, H. Grote, H. J. Pletsch, H. Lin, H. L\\\"uck, H. Mukhopadhyay, H. M\\\"uller-Ebhardt, H. Overmier, H. Radkins, H. Rehbein, H. R. Williams, H. Takahashi, H. Vahlbruch, H. Ward, H. Yamamoto, I. A. Bilenko, I. Duke, I. 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Goggin, L. Ju, L. Matone, L. Ruet, L. Sancho de la Jordana, L. S. Finn, L. Wallace, L. Williams, L. Zhang, M. A. Arain, M. A. Barton, M. A. Papa, M. Araya, M. Bastarrika, M. Brinkmann, M. Degree, M. D\\'iaz, M. Fyffe, M. Gray, M. Guenther, M. Hennessy, M. Hewitson, M. Ito, M. Landry, M. Lei, M. Lormand, M. Lubinski, M. MacInnis, M. Mageswaran, M. McHugh, M. M. Fejer, M. M. Lang, M. Pedraza, M. Pitkin, M. Principe, M. Rakhmanov, M. Ramsunder, M. R. Smith, M. Samidi, M. Sung, M. Trias, M. van der Sluys, M. V. Plissi, M. Weinert, M. Zanolin, M. Zucker, N. A. Lockerbie, N. A. Robertson, N. Christensen, N. D. Smith, N. Fotopoulos, N. Leindecker, N. Mavalvala, N. Rainer, N. Zotov, O. Burmeister, O. Miyakawa, P. Ajith, P. Armor, P. Aufmuth, P. A. Willems, P. Barriga, P. Charlton, P. Ehrens, P. Fritschel, P. J. Sutton, P. Kalmus, P. King, P. K. Lam, P. Kwee, P. Lindquist, P. Lu, P. Murray, P. Patel, P. R. Brady, P. R. Saulson, P. Russell, P. Sarin, P. Savov, P. Schwinberg, P. Shawhan, P. T. Beyersdorf, P. Veitch, R. Abbott, R. Adhikari, R. A. Mercer, R. Amin, R. Biswas, R. Bork, R. Conte, R. DeSalvo, R. Frey, R. Gouaty, R. Grosso, R. Gustafson, R. J. Dupuis, R. Jones, R. J. S. Greenhalgh, R. Khan, R. K. Kopparapu, R. L. Byer, R. Matzner, R. McCarthy, R. M. Cutler, R. Mittleman, R. M. Martin, R. O'Shaughnessy, R. Prix, R. Riesen, R. Route, R. Savage, R. Schilling, R. Schnabel, R. Schofield, R. S. Ottens, R. Stone, R. Taylor, R. Vaulin, R. Ward, R. Weiss, R. Wooley, R. W. P. Drever, S. Aston, S. Babak, S. Ballmer, S. B. Anderson, S. Bose, S. Chatterji, S. Chelkowski, S. C. McGuire, S. Desai, S. Dhurandhar, S. E. Whitcomb, S. Fairhurst, S. Giampanis, S. Gossler, S. Gras, S. Grunewald, S. H. Huttner, S. Hild, S. J. Waldman, S. Kamat, S. Kawamura, S. Klimenko, S. M\\'arka, S. Meshkov, S. Mitra, S. Mohanty, S. M. Scott, S. Mukherjee, S. Penn, S. P. Vyachanin, S. Reid, S. Roddy, S. Rowan, S. Sakata, S. Saraf, S. Sato, S. Sinha, S. Vass, S. Wen, S. W. Schediwy, S. Yoshida, T. Casebolt, T. Cokelaer, T. Corbitt, T. Etzel, T. Evans, T. Fricke, T. Hayler, The LIGO Scientific Collaboration: B. Abbott, T. Meier, T. Nash, T. P. Bodiya, T. Petrie, T. Z. Summerscales, V. B. Braginsky, V. Boschi, V. Dergachev, V. Kalogera, V. Kondrashov, V. Leonhardt, V. Mandic, V. Parameshwaraiah, V. P. Mitrofanov, V. Quetschke, V. Sandberg, V. Sannibale, V. V. Frolov, W. G. Anderson, W. Kells, W. Tyler, W. Winkler, W. W. Johnson, W. Wu, X. Siemens, Y. Aso, Y. Chen, Y. Fan, Y. Pan, Z. M\\'arka, Z. Yan","submitted_at":"2008-05-30T13:50:08Z","abstract_excerpt":"We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravitational-wave Observatory (LIGO). These limits are based on two searches. 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