{"paper":{"title":"Identification and mitigation of narrow spectral artifacts that degrade searches for persistent gravitational waves in the first two observing runs of Advanced LIGO","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Ananyeva, A. A. van Veggel, A. Colla, A. Cumming, A. Effler, A. F. Brooks, A. Fern\\'andez Galiana, A. Matas, A. Mullavey, A. Neunzert, A. Pele, A. P. Lundgren, A. P. Spencer, A. S. Bell, A. S. Markosyan, A. Staley, A. Vecchio, A. W. Heptonstall, B. Barr, B. Gateley, B. Goncharov, B. J. J. Slagmolen, B. Lantz, B. L. Pearlstone, B. O'Reilly, B. P. Abbott, B. Shapiro, B. Smith, B. Sorazu, B. Weaver, B. Willke, C. Adams, C. Austin, C. Biwer, C. C. Wipf, C. C. Yancey, C. D. Blair, C. F. Da Silva Costa, C. Gray, C. I. Torrie, C. J. Perez, C. L. Romel, C. Palomba, C. Vorvick, D. A. Shaddock, D. Barker, D. B. Tanner, D. C. Coyne, D. DeBra, D. E. McClelland, D. H. Reitze, D. H. Shoemaker, D. J. Ottaway, D. M. Macleod, D. Moraru, D. Sellers, D. Sigg, D. Tao, D. Tuyenbayev, D. V. Martynov, E. A. Quintero, E. C. Ferreira, E. Coughlin, E. D. Hall, E. Goetz, E. J. Daw, E. J. King, E. J. Sanchez, E. K. Gustafson, E. L. Merilh, E. Maros, E. Thrane, F. Clara, F. Matichard, G. Billingsley, G. Ciani, G. Hammond, G. Kuehn, G. McIntyre, G. Mendell, G. M. Harry, G. Mo, G. Moreno, G. Mueller, G. Traylor, G. Vajente, G. Valdes, Hang Yu, Haocun Yu, H. Cao, H. Fair, H. Fong, H. Grote, H. Overmier, H. Radkins, H. Yamamoto, I. Bartos, I. Pinto, I. W. Martin, J. A. Giaime, J. Bartlett, J. Betzwieser, J. Birch, J. C. Batch, J. C. Driggers, J. D. Tasson, J. G. Rollins, J. Hanks, J. Hanson, J. Hough, J. H. Romie, J. Liu, J. McIver, J. Miller, J. Munch, J. Oberling, J. R. Palamos, J. R. Smith, J. S. Kissel, J. Warner, J. Wofford, J. Worden, J. Zweizig, K. Arai, K. A. Strain, K. A. Thorne, K. Danzmann, K. D. Giardina, K. E. Gushwa, K. E. Ramirez, K. Izumi, K. Kawabe, K. L. Dooley, K. Mason, K. Mogushi, K. Rao, K. Riles, K. Ryan, K. Toland, K. Venkateswara, L. Barsotti, L. Cunningham, L. E. Sanchez, L. G. Prokhorov, L. K. Nuttall, L. McCuller, L. Sammut, L. Sun, L. Zhang, M. Bejger, M. C. Heintze, M. Evans, M. E. Zucker, M. Factourovich, M. Fyffe, M. J. Cowart, M. Kasprzack, M. Landry, M. Laxen, M. Lormand, M. MacInnis, M. Oliver, M. Phelps, M. Principe, M. P. Ross, M. Thomas, M. Tse, M. Wade, M. Walker, M. W. Coughlin, N. A. Lockerbie, N. A. Robertson, N. Christensen, N. Kijbunchoo, N. Mavalvala, N. Mukund, N. Strauss, O. J. Piccinni, O. Oktavia, O. Puncken, P. Astone, P. B. Covas, P. Clearwater, P. Corban, P. Fritschel, P. Fulda, P. J. King, P. J. Veitch, P. Marsh, P. M. Meyers, P. Nguyen, P. Oppermann, P. Raffai, P. Thomas, P. We{\\ss}els, R. Abbott, R. Bork, R. DeSalvo, R. Frey, R. Goetz, R. Gustafson, Richard J. Oram, R. Inta, R. Jones, R. Kennedy, R. L. Savage, R. L. Ward, R. M. Blair, R. McCarthy, R. Mittleman, R. M. S. Schofield, R. Ormiston, R. P. Fisher, R. Taylor, R. T. DeRosa, R. Weiss, R. X. Adhikari, S. Appert, S. Biscans, S. Biscoveanu, S. Doravari, S. E. Dwyer, S. G. Crowder, S. Gras, S. Hourihane, S. J. Cooper, S. Kandhasamy, S. Karki, S. Kaufer, S. M\\'arka, S. M. Aston, S. McCormick, S. Penn, S. Reid, S. Rowan, S. Schlassa, S. T. Countryman, S. Trembath-Reichert, S. W. Ballmer, S. Zhu, T. A. Callister, T. B. Edo, T. D. Abbott, T. Etzel, T. Hardwick, T. J. Massinger, T. J. N. Nelson, T. J. Shaffer, T. McRae, T. M. Evans, T. Sadecki, T. Vo, V. B. Adya, V. J. Roma, V. Pierro, V. Quetschke, V. Sandberg, V. V. Frolov, W. Kim, W. Liu, W. Parker, W. Z. Korth, Z. M\\'arka","submitted_at":"2018-01-22T17:17:11Z","abstract_excerpt":"Searches are under way in Advanced LIGO and Virgo data for persistent gravitational waves from continuous sources, e.g. rapidly rotating galactic neutron stars, and stochastic sources, e.g. relic gravitational waves from the Big Bang or superposition of distant astrophysical events such as mergers of black holes or neutron stars. These searches can be degraded by the presence of narrow spectral artifacts (lines) due to instrumental or environmental disturbances. We describe a variety of methods used for finding, identifying and mitigating these artifacts, illustrated with particular examples. 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