{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:TU5WHEJJZZLMWAHAJZT3OWWAYJ","short_pith_number":"pith:TU5WHEJJ","canonical_record":{"source":{"id":"1604.00958","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-04T17:36:00Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"a092d9ebeed8338812c77e666a3f14da3ae19176e5f601929121809a62b58b23","abstract_canon_sha256":"1369fdf98ff50021f5c5550ce8fab5a18dfffb33c59223c03a4e5abd2dba85be"},"schema_version":"1.0"},"canonical_sha256":"9d3b639129ce56cb00e04e67b75ac0c276f0b11e0c01d33ed56eda56db1bf2b0","source":{"kind":"arxiv","id":"1604.00958","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.00958","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"arxiv_version","alias_value":"1604.00958v2","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.00958","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"pith_short_12","alias_value":"TU5WHEJJZZLM","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"TU5WHEJJZZLMWAHA","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"TU5WHEJJ","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:TU5WHEJJZZLMWAHAJZT3OWWAYJ","target":"record","payload":{"canonical_record":{"source":{"id":"1604.00958","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-04T17:36:00Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"a092d9ebeed8338812c77e666a3f14da3ae19176e5f601929121809a62b58b23","abstract_canon_sha256":"1369fdf98ff50021f5c5550ce8fab5a18dfffb33c59223c03a4e5abd2dba85be"},"schema_version":"1.0"},"canonical_sha256":"9d3b639129ce56cb00e04e67b75ac0c276f0b11e0c01d33ed56eda56db1bf2b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:42.117825Z","signature_b64":"mbS+HKGhhFEwtpLm4F+zAg1YWHuy8zC7OYz707wymb4qNc7TZuOOZg1X1N7o+DllefhAMMXszye9uyk+mY67Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d3b639129ce56cb00e04e67b75ac0c276f0b11e0c01d33ed56eda56db1bf2b0","last_reissued_at":"2026-05-18T01:08:42.117285Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:42.117285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.00958","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:08:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ACb7c64gf5YZo6lFd50/9L59Lfcfh7axnvunOXbcjerbmghcb6qbEP9eptwxAv+shfiJLOfY30ynlC7EeDJvAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:42:35.863194Z"},"content_sha256":"a9aea26a1a1dac44e5fc69ee34c1ee9281dfe66613a7e3230945e8df62ebf8ec","schema_version":"1.0","event_id":"sha256:a9aea26a1a1dac44e5fc69ee34c1ee9281dfe66613a7e3230945e8df62ebf8ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:TU5WHEJJZZLMWAHAJZT3OWWAYJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radioactive Iron Rain: Transporting $^{60}$Fe in Supernova Dust to the Ocean Floor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Brian D. Fields, Brian J. Fry, John R. Ellis","submitted_at":"2016-04-04T17:36:00Z","abstract_excerpt":"Several searches have found evidence of $^{60}$Fe deposition, presumably from a near-Earth supernova (SN), with concentrations that vary in different locations on Earth. This paper examines various influences on the path of interstellar dust carrying $^{60}$Fe from a SN through the heliosphere, with the aim of estimating the final global distribution on the ocean floor. We study the influences of magnetic fields, angle of arrival, wind and ocean cycling of SN material on the concentrations at different locations. We find that the passage of SN material through the mesosphere/lower thermosphere"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.00958","kind":"arxiv","version":2},"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":"2026-05-18T01:08:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i7KnkIwW4YN23oLtrlCJdBd2klpCU9Sg4UsscQEjXPaieDp5dHSakyXtZgiHNqdCTLnhh8SwNJM1/qhQH2nRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:42:35.863549Z"},"content_sha256":"ca77555df275e99fab7a05096ab8ad97f04483ea70fca5060eaacc9b19349690","schema_version":"1.0","event_id":"sha256:ca77555df275e99fab7a05096ab8ad97f04483ea70fca5060eaacc9b19349690"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ/bundle.json","state_url":"https://pith.science/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ/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":"2026-06-02T18:42:35Z","links":{"resolver":"https://pith.science/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ","bundle":"https://pith.science/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ/bundle.json","state":"https://pith.science/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TU5WHEJJZZLMWAHAJZT3OWWAYJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:TU5WHEJJZZLMWAHAJZT3OWWAYJ","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":"1369fdf98ff50021f5c5550ce8fab5a18dfffb33c59223c03a4e5abd2dba85be","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-04T17:36:00Z","title_canon_sha256":"a092d9ebeed8338812c77e666a3f14da3ae19176e5f601929121809a62b58b23"},"schema_version":"1.0","source":{"id":"1604.00958","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.00958","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"arxiv_version","alias_value":"1604.00958v2","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.00958","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"pith_short_12","alias_value":"TU5WHEJJZZLM","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"TU5WHEJJZZLMWAHA","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"TU5WHEJJ","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:ca77555df275e99fab7a05096ab8ad97f04483ea70fca5060eaacc9b19349690","target":"graph","created_at":"2026-05-18T01:08:42Z","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":"Several searches have found evidence of $^{60}$Fe deposition, presumably from a near-Earth supernova (SN), with concentrations that vary in different locations on Earth. This paper examines various influences on the path of interstellar dust carrying $^{60}$Fe from a SN through the heliosphere, with the aim of estimating the final global distribution on the ocean floor. We study the influences of magnetic fields, angle of arrival, wind and ocean cycling of SN material on the concentrations at different locations. We find that the passage of SN material through the mesosphere/lower thermosphere","authors_text":"Brian D. Fields, Brian J. Fry, John R. Ellis","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-04T17:36:00Z","title":"Radioactive Iron Rain: Transporting $^{60}$Fe in Supernova Dust to the Ocean Floor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.00958","kind":"arxiv","version":2},"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:a9aea26a1a1dac44e5fc69ee34c1ee9281dfe66613a7e3230945e8df62ebf8ec","target":"record","created_at":"2026-05-18T01:08:42Z","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":"1369fdf98ff50021f5c5550ce8fab5a18dfffb33c59223c03a4e5abd2dba85be","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-04T17:36:00Z","title_canon_sha256":"a092d9ebeed8338812c77e666a3f14da3ae19176e5f601929121809a62b58b23"},"schema_version":"1.0","source":{"id":"1604.00958","kind":"arxiv","version":2}},"canonical_sha256":"9d3b639129ce56cb00e04e67b75ac0c276f0b11e0c01d33ed56eda56db1bf2b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d3b639129ce56cb00e04e67b75ac0c276f0b11e0c01d33ed56eda56db1bf2b0","first_computed_at":"2026-05-18T01:08:42.117285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:42.117285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mbS+HKGhhFEwtpLm4F+zAg1YWHuy8zC7OYz707wymb4qNc7TZuOOZg1X1N7o+DllefhAMMXszye9uyk+mY67Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:42.117825Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.00958","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9aea26a1a1dac44e5fc69ee34c1ee9281dfe66613a7e3230945e8df62ebf8ec","sha256:ca77555df275e99fab7a05096ab8ad97f04483ea70fca5060eaacc9b19349690"],"state_sha256":"c34fbcf65943247772d0b9911d39955cf850b026eec7d74331d8d5bd990ecbc2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TAtvpXFi4fP8mmzILve01hiZmL1elkLOcCvYUoCwYAvrMEBJ+lsZAOUUi5fpWUr7BPji6awMujOBAeQiCDrWCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T18:42:35.865411Z","bundle_sha256":"60fbc90667f35d3931ddb58dc2e76fbdbebbca06f96110f7e93fe9f05d1c8ad9"}}