{"paper":{"title":"Broadband Pulsations from PSR B1821-24: Implications for Emission Models and the Pulsar Population of M28","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. G. Lyne, A. K. Harding, B. W. Stappers, C. C. Cheung, C. M. Espinoza, C. Venter, D. A. Smith, E. C. Ferrara, F. Camilo, G. H. Janssen, G. Theureau, I. Cognard, I. H. Stairs, J. E. Grove, J. M. Casandjian, L. Guillemot, M. Kerr, M. Kramer, M. T. Wolff, M. Wood, P. C. C. Freire, P. F. Michelson, P. S. Ray, R. Shannon, R. W. Romani, S. Begin, S. E. Thorsett, S. Johnston, S. M. Ransom, T. J. Johnson","submitted_at":"2013-10-07T16:30:39Z","abstract_excerpt":"We report a 5.4\\sigma\\ detection of pulsed gamma rays from PSR B1821-24 in the globular cluster M28 using ~44 months of Fermi Large Area Telescope (LAT) data that have been reprocessed with improved instrument calibration constants. We constructed a phase-coherent ephemeris, with post-fit residual RMS of 3 \\mu s, using radio data spanning ~23.2 years, enabling measurements of the multi-wavelength light curve properties of PSR B1821-24 at the milliperiod level. We fold RXTE observations of PSR B1821-24 from 1996 to 2007 and discuss implications on the emission zones. The gamma-ray light curve c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.1852","kind":"arxiv","version":1},"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"}