{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4EZKLHIK5PPPSRMRQRNGDHWF6J","short_pith_number":"pith:4EZKLHIK","canonical_record":{"source":{"id":"1801.01311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-04T11:34:58Z","cross_cats_sorted":[],"title_canon_sha256":"aa98a38d2b765ece066d6997b538121ac28e124efc20423ad9548810edcb3b13","abstract_canon_sha256":"d6ea8cfef0f8911dc2c65b7da6f9cccef06898bb55e162be69c7f88734e1b9e9"},"schema_version":"1.0"},"canonical_sha256":"e132a59d0aebdef94591845a619ec5f27b99d778700be146cbe5c665a21a4f4f","source":{"kind":"arxiv","id":"1801.01311","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.01311","created_at":"2026-05-18T00:22:56Z"},{"alias_kind":"arxiv_version","alias_value":"1801.01311v1","created_at":"2026-05-18T00:22:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.01311","created_at":"2026-05-18T00:22:56Z"},{"alias_kind":"pith_short_12","alias_value":"4EZKLHIK5PPP","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4EZKLHIK5PPPSRMR","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4EZKLHIK","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4EZKLHIK5PPPSRMRQRNGDHWF6J","target":"record","payload":{"canonical_record":{"source":{"id":"1801.01311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-04T11:34:58Z","cross_cats_sorted":[],"title_canon_sha256":"aa98a38d2b765ece066d6997b538121ac28e124efc20423ad9548810edcb3b13","abstract_canon_sha256":"d6ea8cfef0f8911dc2c65b7da6f9cccef06898bb55e162be69c7f88734e1b9e9"},"schema_version":"1.0"},"canonical_sha256":"e132a59d0aebdef94591845a619ec5f27b99d778700be146cbe5c665a21a4f4f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:56.900854Z","signature_b64":"LbachyiNY93uPRgP2YXwjLatD+bqIIC1NraRA2CiSVwjk81lXtVpcd9PEd4279DzLAu/ZCOzE3wzcwpGfiGJCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e132a59d0aebdef94591845a619ec5f27b99d778700be146cbe5c665a21a4f4f","last_reissued_at":"2026-05-18T00:22:56.900460Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:56.900460Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.01311","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":"2026-05-18T00:22:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OUhJ+OV1rPtoF/E/xJCSthJkr8Y28/Z/shMzILxH2UUDMzt0mhMy4Ep9mJFoiOVXQinzRlWcc1R10/jG7vocAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:20:14.863221Z"},"content_sha256":"ea28804cd45c333410a8cfe4484d1506e59b1f2cba142c829eb3c710fdc07771","schema_version":"1.0","event_id":"sha256:ea28804cd45c333410a8cfe4484d1506e59b1f2cba142c829eb3c710fdc07771"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4EZKLHIK5PPPSRMRQRNGDHWF6J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long-term evolution of the heliospheric magnetic field inferred from cosmogenic $^{44}$Ti activity in meteorites","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"C. Taricco, N. Bhandari, N. Sinha, P. Colombetti, S. Mancuso, S. Rubinetti","submitted_at":"2018-01-04T11:34:58Z","abstract_excerpt":"Typical reconstructions of historic heliospheric magnetic field (HMF) $B_{\\rm HMF}$ are based on the analysis of the sunspot activity, geomagnetic data or on measurement of cosmogenic isotopes stored in terrestrial reservoirs like trees ($^{14}$C) and ice cores ($^{10}$Be). The various reconstructions of $B_{\\rm HMF}$ are however discordant both in strength and trend. Cosmogenic isotopes, which are produced by galactic cosmic rays (GCRs) impacting on meteoroids and whose production rate is modulated by the varying HMF convected outward by the solar wind, may offer an alternative tool for the i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01311","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":"2026-05-18T00:22:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8o1EIzUj/sItamH3czksrvhVd5MQOusmlV8Trup/sHUkcLjhi5Y2f8v9qprl+qHqcAvNnzqTyavdAm8o4jDiAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:20:14.863581Z"},"content_sha256":"27ab13eb5d1b9a3cfc7eb0c88529433adb8911cb7ff8d0e1dbbedb8f39c9a879","schema_version":"1.0","event_id":"sha256:27ab13eb5d1b9a3cfc7eb0c88529433adb8911cb7ff8d0e1dbbedb8f39c9a879"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J/bundle.json","state_url":"https://pith.science/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J/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":"2026-06-03T01:20:14Z","links":{"resolver":"https://pith.science/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J","bundle":"https://pith.science/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J/bundle.json","state":"https://pith.science/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4EZKLHIK5PPPSRMRQRNGDHWF6J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4EZKLHIK5PPPSRMRQRNGDHWF6J","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":"d6ea8cfef0f8911dc2c65b7da6f9cccef06898bb55e162be69c7f88734e1b9e9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-04T11:34:58Z","title_canon_sha256":"aa98a38d2b765ece066d6997b538121ac28e124efc20423ad9548810edcb3b13"},"schema_version":"1.0","source":{"id":"1801.01311","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.01311","created_at":"2026-05-18T00:22:56Z"},{"alias_kind":"arxiv_version","alias_value":"1801.01311v1","created_at":"2026-05-18T00:22:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.01311","created_at":"2026-05-18T00:22:56Z"},{"alias_kind":"pith_short_12","alias_value":"4EZKLHIK5PPP","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4EZKLHIK5PPPSRMR","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4EZKLHIK","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:27ab13eb5d1b9a3cfc7eb0c88529433adb8911cb7ff8d0e1dbbedb8f39c9a879","target":"graph","created_at":"2026-05-18T00:22:56Z","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":"Typical reconstructions of historic heliospheric magnetic field (HMF) $B_{\\rm HMF}$ are based on the analysis of the sunspot activity, geomagnetic data or on measurement of cosmogenic isotopes stored in terrestrial reservoirs like trees ($^{14}$C) and ice cores ($^{10}$Be). The various reconstructions of $B_{\\rm HMF}$ are however discordant both in strength and trend. Cosmogenic isotopes, which are produced by galactic cosmic rays (GCRs) impacting on meteoroids and whose production rate is modulated by the varying HMF convected outward by the solar wind, may offer an alternative tool for the i","authors_text":"C. Taricco, N. Bhandari, N. Sinha, P. Colombetti, S. Mancuso, S. Rubinetti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-04T11:34:58Z","title":"Long-term evolution of the heliospheric magnetic field inferred from cosmogenic $^{44}$Ti activity in meteorites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01311","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:ea28804cd45c333410a8cfe4484d1506e59b1f2cba142c829eb3c710fdc07771","target":"record","created_at":"2026-05-18T00:22:56Z","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":"d6ea8cfef0f8911dc2c65b7da6f9cccef06898bb55e162be69c7f88734e1b9e9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-01-04T11:34:58Z","title_canon_sha256":"aa98a38d2b765ece066d6997b538121ac28e124efc20423ad9548810edcb3b13"},"schema_version":"1.0","source":{"id":"1801.01311","kind":"arxiv","version":1}},"canonical_sha256":"e132a59d0aebdef94591845a619ec5f27b99d778700be146cbe5c665a21a4f4f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e132a59d0aebdef94591845a619ec5f27b99d778700be146cbe5c665a21a4f4f","first_computed_at":"2026-05-18T00:22:56.900460Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:56.900460Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LbachyiNY93uPRgP2YXwjLatD+bqIIC1NraRA2CiSVwjk81lXtVpcd9PEd4279DzLAu/ZCOzE3wzcwpGfiGJCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:56.900854Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.01311","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea28804cd45c333410a8cfe4484d1506e59b1f2cba142c829eb3c710fdc07771","sha256:27ab13eb5d1b9a3cfc7eb0c88529433adb8911cb7ff8d0e1dbbedb8f39c9a879"],"state_sha256":"1d0ec402eca3af30df6aad455ddc4f18b11551da3ae405c4e3300fa0fe27c885"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"quIkCQPeBw34bT1c0HKqNndmeslRfze4IhPZJeiwEb/umEWtkdI8d79lCZOcRuKmNv5EpUG4WM4OnxZFDaOIBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T01:20:14.865557Z","bundle_sha256":"c1a62ec7ef043ac633a57363485272d808bb8914c64d26d39cea2aac17d94c06"}}