{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:KKZGXL7LSM2O67IXJ24Z3XHV5J","short_pith_number":"pith:KKZGXL7L","canonical_record":{"source":{"id":"astro-ph/0111094","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-05T17:26:48Z","cross_cats_sorted":[],"title_canon_sha256":"a87e8dfc327c7f8809f29928c9b24e1a277f8c0e8001df046f033d77fd273050","abstract_canon_sha256":"cf3477de11a6ca1b33e3e1f31ac2cb33847bd9f59d22c19064c86bce79b17968"},"schema_version":"1.0"},"canonical_sha256":"52b26bafeb9334ef7d174eb99ddcf5ea60b5b0b7529d5820d2803939bb53cd84","source":{"kind":"arxiv","id":"astro-ph/0111094","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0111094","created_at":"2026-05-18T04:15:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0111094v1","created_at":"2026-05-18T04:15:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0111094","created_at":"2026-05-18T04:15:27Z"},{"alias_kind":"pith_short_12","alias_value":"KKZGXL7LSM2O","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"KKZGXL7LSM2O67IX","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"KKZGXL7L","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:KKZGXL7LSM2O67IXJ24Z3XHV5J","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0111094","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-05T17:26:48Z","cross_cats_sorted":[],"title_canon_sha256":"a87e8dfc327c7f8809f29928c9b24e1a277f8c0e8001df046f033d77fd273050","abstract_canon_sha256":"cf3477de11a6ca1b33e3e1f31ac2cb33847bd9f59d22c19064c86bce79b17968"},"schema_version":"1.0"},"canonical_sha256":"52b26bafeb9334ef7d174eb99ddcf5ea60b5b0b7529d5820d2803939bb53cd84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:15:27.510231Z","signature_b64":"dX8/WeeO8BXgXEzbp/F+R+dg80B3VcIaqcMXKY98w22/sgrzmq4sTwfKtdag620vkrnw9/+XZ+gOofb6GUj5BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52b26bafeb9334ef7d174eb99ddcf5ea60b5b0b7529d5820d2803939bb53cd84","last_reissued_at":"2026-05-18T04:15:27.509851Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:15:27.509851Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0111094","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:15:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"36US6rU5Dpf/AvKMOtxvqMNgYBWQO7njtJzhYPdVT0p6Ov1whyXu44PG9BTDt/4Tfn1ChkU/NLv1j9+VneLjDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:12:23.747871Z"},"content_sha256":"6e21600a07b57ef7049dfb46dc75723d7e1676a976d3e4a6c7f5d4bce6aa4a11","schema_version":"1.0","event_id":"sha256:6e21600a07b57ef7049dfb46dc75723d7e1676a976d3e4a6c7f5d4bce6aa4a11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:KKZGXL7LSM2O67IXJ24Z3XHV5J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurement of the Cosmic-Ray Antiproton to Proton Abundance Ratio between 4 and 50 GeV","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Bhattacharyya, A.S.Beach, A. Tomasch, A.W. Labrador, C. Bower, D. Muller, G. Tarle, J.J. Beatty, J. Musser, M.A. DuVernois, M. Schubnell, S.A. Minnick, S. Coutu, S. McKee, S. Nutter, S. Swordy","submitted_at":"2001-11-05T17:26:48Z","abstract_excerpt":"We present a new measurement of the antiproton to proton abundance ratio, pbar/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precise rigidity and multiple energy loss measurement capability, was flown successfully in Spring 2000, at an average atmospheric depth of 7.2 g/cm^2. A total of 71 antiprotons were identified above the vertical geomagnetic cut-off rigidity of 4.2 GV. The highest measured proton energy was 81 GeV. We find that the pbar/p abundance ratio agrees with that expected from a purely secondary origin of antiprotons produced by pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0111094","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:15:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Zfj6PPlnRKTEbaGvTMbzARimnGgLelUUsbdX4h79VLjzrHlfsXCdptUFmo8R0eB4siLovYOFebXoNWziYnppAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:12:23.748222Z"},"content_sha256":"85b6c0c4f84363f57ec1e79ee94d1c020eda6709c3f1ec91b87253b13587b87c","schema_version":"1.0","event_id":"sha256:85b6c0c4f84363f57ec1e79ee94d1c020eda6709c3f1ec91b87253b13587b87c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J/bundle.json","state_url":"https://pith.science/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T20:12:23Z","links":{"resolver":"https://pith.science/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J","bundle":"https://pith.science/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J/bundle.json","state":"https://pith.science/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KKZGXL7LSM2O67IXJ24Z3XHV5J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:KKZGXL7LSM2O67IXJ24Z3XHV5J","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"cf3477de11a6ca1b33e3e1f31ac2cb33847bd9f59d22c19064c86bce79b17968","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-05T17:26:48Z","title_canon_sha256":"a87e8dfc327c7f8809f29928c9b24e1a277f8c0e8001df046f033d77fd273050"},"schema_version":"1.0","source":{"id":"astro-ph/0111094","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0111094","created_at":"2026-05-18T04:15:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0111094v1","created_at":"2026-05-18T04:15:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0111094","created_at":"2026-05-18T04:15:27Z"},{"alias_kind":"pith_short_12","alias_value":"KKZGXL7LSM2O","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"KKZGXL7LSM2O67IX","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"KKZGXL7L","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:85b6c0c4f84363f57ec1e79ee94d1c020eda6709c3f1ec91b87253b13587b87c","target":"graph","created_at":"2026-05-18T04:15:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We present a new measurement of the antiproton to proton abundance ratio, pbar/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precise rigidity and multiple energy loss measurement capability, was flown successfully in Spring 2000, at an average atmospheric depth of 7.2 g/cm^2. A total of 71 antiprotons were identified above the vertical geomagnetic cut-off rigidity of 4.2 GV. The highest measured proton energy was 81 GeV. We find that the pbar/p abundance ratio agrees with that expected from a purely secondary origin of antiprotons produced by pr","authors_text":"A. Bhattacharyya, A.S.Beach, A. Tomasch, A.W. Labrador, C. Bower, D. Muller, G. Tarle, J.J. Beatty, J. Musser, M.A. DuVernois, M. Schubnell, S.A. Minnick, S. Coutu, S. McKee, S. Nutter, S. Swordy","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-11-05T17:26:48Z","title":"Measurement of the Cosmic-Ray Antiproton to Proton Abundance Ratio between 4 and 50 GeV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0111094","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6e21600a07b57ef7049dfb46dc75723d7e1676a976d3e4a6c7f5d4bce6aa4a11","target":"record","created_at":"2026-05-18T04:15:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"cf3477de11a6ca1b33e3e1f31ac2cb33847bd9f59d22c19064c86bce79b17968","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-05T17:26:48Z","title_canon_sha256":"a87e8dfc327c7f8809f29928c9b24e1a277f8c0e8001df046f033d77fd273050"},"schema_version":"1.0","source":{"id":"astro-ph/0111094","kind":"arxiv","version":1}},"canonical_sha256":"52b26bafeb9334ef7d174eb99ddcf5ea60b5b0b7529d5820d2803939bb53cd84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52b26bafeb9334ef7d174eb99ddcf5ea60b5b0b7529d5820d2803939bb53cd84","first_computed_at":"2026-05-18T04:15:27.509851Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:15:27.509851Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dX8/WeeO8BXgXEzbp/F+R+dg80B3VcIaqcMXKY98w22/sgrzmq4sTwfKtdag620vkrnw9/+XZ+gOofb6GUj5BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:15:27.510231Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0111094","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6e21600a07b57ef7049dfb46dc75723d7e1676a976d3e4a6c7f5d4bce6aa4a11","sha256:85b6c0c4f84363f57ec1e79ee94d1c020eda6709c3f1ec91b87253b13587b87c"],"state_sha256":"74f30b312b215b4aefd67c865ede078717c9026fd88c2e0a8e26938c251a04f3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C+sTVwtcq90AJ6OOU+vjckzDymI71OxDPKsy5lltjma7Y+T3SDGdt6usVHDY6fcADR7oRMUmMvTIAQJxsFWRDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T20:12:23.750509Z","bundle_sha256":"b61dbb3b6a66788dd986e40fc4cba16a2f214aa156bb8e5f9da4963554cd254a"}}