{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:QJOZYZPPHQQDRFXA42OJOEWS2W","short_pith_number":"pith:QJOZYZPP","canonical_record":{"source":{"id":"1111.4141","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-11-17T16:31:48Z","cross_cats_sorted":[],"title_canon_sha256":"6f6427aa0326c33ce90bdfa196ec7154b2557f0b6802de22eb07648d439a765b","abstract_canon_sha256":"f7685e0dd5cc48b6da3cbafdad00b248e7be4a10bae92aff1de999a52e760482"},"schema_version":"1.0"},"canonical_sha256":"825d9c65ef3c203896e0e69c9712d2d5b7da042e435db90650473f51f88953f6","source":{"kind":"arxiv","id":"1111.4141","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4141","created_at":"2026-05-18T02:21:29Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4141v3","created_at":"2026-05-18T02:21:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4141","created_at":"2026-05-18T02:21:29Z"},{"alias_kind":"pith_short_12","alias_value":"QJOZYZPPHQQD","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QJOZYZPPHQQDRFXA","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QJOZYZPP","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:QJOZYZPPHQQDRFXA42OJOEWS2W","target":"record","payload":{"canonical_record":{"source":{"id":"1111.4141","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-11-17T16:31:48Z","cross_cats_sorted":[],"title_canon_sha256":"6f6427aa0326c33ce90bdfa196ec7154b2557f0b6802de22eb07648d439a765b","abstract_canon_sha256":"f7685e0dd5cc48b6da3cbafdad00b248e7be4a10bae92aff1de999a52e760482"},"schema_version":"1.0"},"canonical_sha256":"825d9c65ef3c203896e0e69c9712d2d5b7da042e435db90650473f51f88953f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:21:29.080362Z","signature_b64":"M73JRNENQWNOCXqITNyDKrNTrQnHjnCK8UCfF6AEx1eBgAvHN6+JGnfACZQOt1c9a9Oaak0xsxtJFq5YqpE/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"825d9c65ef3c203896e0e69c9712d2d5b7da042e435db90650473f51f88953f6","last_reissued_at":"2026-05-18T02:21:29.079817Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:21:29.079817Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.4141","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:21:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DCDjZ53eBGriDpnN+3wZvfgJMkGjaybU1dRgHztc2TTN2a7RRY7ir8P5nXiey+rUzraOyFbBvAD7I45jttD0AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:32:25.500693Z"},"content_sha256":"d54243198e6296d061df57a147d90ceb0f12138e780b89ab4f0ced38ae786806","schema_version":"1.0","event_id":"sha256:d54243198e6296d061df57a147d90ceb0f12138e780b89ab4f0ced38ae786806"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:QJOZYZPPHQQDRFXA42OJOEWS2W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima Dai-ichi reactor accident","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"G. K. Giovanetti, J. F. Wilkerson, K. Vorren, M. P. Green, R. Henning, R. Holmes, S. MacMullin","submitted_at":"2011-11-17T16:31:48Z","abstract_excerpt":"We present measurements of airborne fission products in Chapel Hill, NC, USA, from 62 days following the March 11, 2011, accident at the Fukushima Dai-ichi nuclear power plant. Airborne particle samples were collected daily in air filters and radio-assayed with two high-purity germanium (HPGe) detectors. The fission products I-131 and Cs-137 were measured with maximum activities of 4.2 +/- 0.6 mBq/m^3 and 0.42 +/- 0.07 mBq/m^3 respectively. Additional activity from I-131, I-132, Cs-134, Cs-136, Cs-137 and Te-132 were measured in the same air filters using a low-background HPGe detector at the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4141","kind":"arxiv","version":3},"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":"2026-05-18T02:21:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ImH4PMiTfqbXptd3t6TzQzgi/m5AsD8+0M0CBqjuPsZuZfPxnaXBpmlnyY8aC0RkzhTiNHsX4g5yADz32a3oCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:32:25.501044Z"},"content_sha256":"f2885b53fa71fd617309f746b3c92ec9354685816f3b361fb3b583a377f146f0","schema_version":"1.0","event_id":"sha256:f2885b53fa71fd617309f746b3c92ec9354685816f3b361fb3b583a377f146f0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJOZYZPPHQQDRFXA42OJOEWS2W/bundle.json","state_url":"https://pith.science/pith/QJOZYZPPHQQDRFXA42OJOEWS2W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJOZYZPPHQQDRFXA42OJOEWS2W/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":"2026-05-31T17:32:25Z","links":{"resolver":"https://pith.science/pith/QJOZYZPPHQQDRFXA42OJOEWS2W","bundle":"https://pith.science/pith/QJOZYZPPHQQDRFXA42OJOEWS2W/bundle.json","state":"https://pith.science/pith/QJOZYZPPHQQDRFXA42OJOEWS2W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJOZYZPPHQQDRFXA42OJOEWS2W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QJOZYZPPHQQDRFXA42OJOEWS2W","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":"f7685e0dd5cc48b6da3cbafdad00b248e7be4a10bae92aff1de999a52e760482","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-11-17T16:31:48Z","title_canon_sha256":"6f6427aa0326c33ce90bdfa196ec7154b2557f0b6802de22eb07648d439a765b"},"schema_version":"1.0","source":{"id":"1111.4141","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.4141","created_at":"2026-05-18T02:21:29Z"},{"alias_kind":"arxiv_version","alias_value":"1111.4141v3","created_at":"2026-05-18T02:21:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.4141","created_at":"2026-05-18T02:21:29Z"},{"alias_kind":"pith_short_12","alias_value":"QJOZYZPPHQQD","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QJOZYZPPHQQDRFXA","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QJOZYZPP","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:f2885b53fa71fd617309f746b3c92ec9354685816f3b361fb3b583a377f146f0","target":"graph","created_at":"2026-05-18T02:21:29Z","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 measurements of airborne fission products in Chapel Hill, NC, USA, from 62 days following the March 11, 2011, accident at the Fukushima Dai-ichi nuclear power plant. Airborne particle samples were collected daily in air filters and radio-assayed with two high-purity germanium (HPGe) detectors. The fission products I-131 and Cs-137 were measured with maximum activities of 4.2 +/- 0.6 mBq/m^3 and 0.42 +/- 0.07 mBq/m^3 respectively. Additional activity from I-131, I-132, Cs-134, Cs-136, Cs-137 and Te-132 were measured in the same air filters using a low-background HPGe detector at the ","authors_text":"G. K. Giovanetti, J. F. Wilkerson, K. Vorren, M. P. Green, R. Henning, R. Holmes, S. MacMullin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-11-17T16:31:48Z","title":"Measurement of airborne fission products in Chapel Hill, NC, USA from the Fukushima Dai-ichi reactor accident"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4141","kind":"arxiv","version":3},"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:d54243198e6296d061df57a147d90ceb0f12138e780b89ab4f0ced38ae786806","target":"record","created_at":"2026-05-18T02:21:29Z","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":"f7685e0dd5cc48b6da3cbafdad00b248e7be4a10bae92aff1de999a52e760482","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-11-17T16:31:48Z","title_canon_sha256":"6f6427aa0326c33ce90bdfa196ec7154b2557f0b6802de22eb07648d439a765b"},"schema_version":"1.0","source":{"id":"1111.4141","kind":"arxiv","version":3}},"canonical_sha256":"825d9c65ef3c203896e0e69c9712d2d5b7da042e435db90650473f51f88953f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"825d9c65ef3c203896e0e69c9712d2d5b7da042e435db90650473f51f88953f6","first_computed_at":"2026-05-18T02:21:29.079817Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:29.079817Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"M73JRNENQWNOCXqITNyDKrNTrQnHjnCK8UCfF6AEx1eBgAvHN6+JGnfACZQOt1c9a9Oaak0xsxtJFq5YqpE/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:29.080362Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.4141","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d54243198e6296d061df57a147d90ceb0f12138e780b89ab4f0ced38ae786806","sha256:f2885b53fa71fd617309f746b3c92ec9354685816f3b361fb3b583a377f146f0"],"state_sha256":"23912882f3d2b8c4ed209098f602732ab400f6a14c2bb4c7968d415abb737a96"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PHhSF6jHHox0k3tgJoyxkanRzVIeUtkFROoxqXb8n4ODFIB80JgyCfW9FSyLtXfeiE1OW25cijix0416If0EAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T17:32:25.503292Z","bundle_sha256":"75d927861f681aab09a4156d172d6c8eccd39918005cbccc1f45a656a6321fc7"}}