{"paper":{"title":"The NANOGrav 11-year Data Set: Pulse Profile Variability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Karastergiou, C. Ng, D. J. Nice, D. R. Lorimer, D. R. Stinebring, E. Ferrara, E. Fonseca, G. Jones, I. H. Stairs, J. A. Ellis, J. K. Swiggum, J. M. Cordes, K. Crowter, K. Stovall, L. Levin, M. A. McLaughlin, M. DeCesar, M. L. Jones, M. T. Lam, P. A. Gentile, P. B. Demorest, P. R. Brook, P. S. Ray, R. D. Ferdman, R. S. Lynch, R. Spiewak, S. Chatterjee, S. M. Ransom, T. Dolch, T. J. W. Lazio, T. T. Pennucci, W. W. Zhu, Z. Arzoumanian","submitted_at":"2018-10-18T20:35:52Z","abstract_excerpt":"Access to 50 years of data has led to the discovery of pulsar emission and rotation variability on timescales of months and years. Most of this long-term variability has been seen in long-period pulsars, with relatively little focus on recycled millisecond pulsars. We have analyzed a 38-pulsar sub-set of the 45 millisecond pulsars in the NANOGrav 11-year data set, in order to review their pulse profile stability. The most variability, on any timescale, is seen in PSRs J1713+0747, B1937+21 and J2145-0750. The strongest evidence for long-timescale pulse profile changes is seen in PSRs B1937+21 a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08269","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"}