{"paper":{"title":"The Steady Spin Down Rate of 4U 1907+09","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Baykal, C. Inam (Middle East Technical University, J. in't Zand (Space Research Organization Sorbonnelaan, M.A. Alpar (Sabanci University, Netherlands), T. Strohmayer (NASA/GSFC, Turkey), USA)","submitted_at":"2000-11-22T13:51:07Z","abstract_excerpt":"Using X-ray data from the Rossi X-Ray Timing Explorer (RXTE), we report the pulse timing results of the accretion powered high mass X-ray binary (HMXRB) pulsar 4U 1907+09 covering a time span of almost two years. We measured three new pulse periods in addition to the previously measured four pulse periods. We are able to connect pulse arrival times in phase for more than a year. The source has been spinning down almost at a constant rate with a spin down rate of\n \\dot \\nu = (-3.54 \\pm 0.02) \\times 10^{-14} Hz s ^{-1} for more than\n 15 years. Residuals of pulse arrival times yield a very low le"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0011404","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"}