{"paper":{"title":"Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Moiseev, A. Yamamoto, E. S. Seo, H. Matsumoto, H. Matsunaga, I. Ueda, J. Mitchell, J. Nishimura, J. Ormes, J. Suzuki, J. Z. Wang, K. Abe, K. Anraku, K. Tanaka, K. Yoshimura, M. Fujikawa, M. Imori, M. Motoki, M. Nozaki, M. Sasaki, N. Matsui, N. Yajima, R. Streitmatter, S. Orito, T. Maeno, T. Mitsui, T. Saeki, T. Sanuki, T. Sonoda, T. Yamagami, T. Yoshida, Y. Asaoka, Y. Makida, Y. Shikaze","submitted_at":"2000-02-25T11:28:59Z","abstract_excerpt":"We report cosmic-ray proton and helium spectra in energy ranges of 1 to 120 GeV and 1 to 54 GeV/nucleon, respectively, measured by a balloon flight of the BESS spectrometer in 1998. The magnetic-rigidity of the cosmic-rays was reliably determined by highly precise measurement of the circular track in a uniform solenoidal magnetic field of 1 Tesla. Those spectra were determined within overall uncertainties of +-5 % for protons and +- 10 % for helium nuclei including statistical and systematic errors."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0002481","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0002481/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}