{"paper":{"title":"NANOGrav Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries in Circular Orbits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","gr-qc"],"primary_cat":"astro-ph.GA","authors_text":"A. Brazier, A. N. Lommen, A. Sesana, D. J. Nice, D. R. Lorimer, D. R. Madison, D. R. Stinebring, F. Jenet, G. Jones, I. H. Stairs, J. A. Ellis, J. Luo, J. M. Cordes, J. Swiggum, K. Stovall, M. Koop, M. Lam, M. McLaughlin, M. Vallisneri, N. Garver-Daniels, N. Palliyaguru, P. B. Demorest, R. D. Ferdman, R. S. Lynch, R. van Haasteren, S. Burke-Spolaor, S. Chatterjee, S. J. Chamberlin, S. M. Ransom, S. T. McWilliams, T. Dolch, T. J. W. Lazio, T. T. Pennucci, V. M. Kaspi, W. W. Zhu, X. Deng, X. Siemens, Y. Wang, Z. Arzoumanian","submitted_at":"2014-04-04T14:34:35Z","abstract_excerpt":"The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) project currently observes 43 pulsars using the Green Bank and Arecibo radio telescopes. In this work we use a subset of 17 pulsars timed for a span of roughly five years (2005--2010). We analyze these data using standard pulsar timing models, with the addition of time-variable dispersion measure and frequency-variable pulse shape terms. Within the timing data, we perform a search for continuous gravitational waves from individual supermassive black hole binaries in circular orbits using robust frequentist and Bayesian"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.1267","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}