{"paper":{"title":"A Second Chromatic Timing Event of Interstellar Origin toward PSR J1713+0747","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. Ng, D. J. Nice, D. R. Lorimer, D. R. Madison, D. R. Stinebring, E. C. Ferrara, E. Fonseca, G. Grillo, H. Blumer, H. T. Cromartie, I. H. Stairs, J. A. Ellis, J. E. Turner, J. K. Swiggum, J. M. Cordes, J. S. Hazboun, K. Stovall, M. A. McLaughlin, M. E. DeCesar, M. L. Jones, M. T. Lam, N. Garver-Daniels, P. A. Gentile, P. B. Demorest, P. R. Brook, R. D. Ferdman, R. S. Lynch, R. Spiewak, S. Chatterjee, S. J. Vigeland, S. M. Ransom, T. Dolch, T. J. W. Lazio, T. T. Pennucci, V. Gupta, W. W. Zhu, Z. Arzoumanian","submitted_at":"2017-12-11T06:07:43Z","abstract_excerpt":"The frequency dependence of radio pulse arrival times provides a probe of structures in the intervening media. Demorest et al. 2013 was the first to show a short-term (~100-200 days) reduction in the electron content along the line of sight to PSR J1713+0747 in data from 2008 (approximately MJD 54750) based on an apparent dip in the dispersion measure of the pulsar. We report on a similar event in 2016 (approximately MJD 57510), with average residual pulse-arrival times of approximately 3.0,-1.3, and -0.7 microseconds at 820, 1400, and 2300 MHz, respectively. Timing analyses indicate possible "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.03651","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"}