{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:UZPPFRPPR6Q6N6BHR6NVWM2QYX","short_pith_number":"pith:UZPPFRPP","canonical_record":{"source":{"id":"nucl-ex/9912005","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"1999-12-08T20:55:35Z","cross_cats_sorted":[],"title_canon_sha256":"cdf987e1f940731314c09b426732ac5cf86d4c7ba619acefcc71d116f1efdc1e","abstract_canon_sha256":"f30a5231defd105afd577a986aedc98c8ac7d34bc082fd5cd2f62bc88640e052"},"schema_version":"1.0"},"canonical_sha256":"a65ef2c5ef8fa1e6f8278f9b5b3350c5f636ec3797b924f454378b9bd35bfa12","source":{"kind":"arxiv","id":"nucl-ex/9912005","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/9912005","created_at":"2026-05-18T02:35:37Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/9912005v1","created_at":"2026-05-18T02:35:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/9912005","created_at":"2026-05-18T02:35:37Z"},{"alias_kind":"pith_short_12","alias_value":"UZPPFRPPR6Q6","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"UZPPFRPPR6Q6N6BH","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"UZPPFRPP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:UZPPFRPPR6Q6N6BHR6NVWM2QYX","target":"record","payload":{"canonical_record":{"source":{"id":"nucl-ex/9912005","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"1999-12-08T20:55:35Z","cross_cats_sorted":[],"title_canon_sha256":"cdf987e1f940731314c09b426732ac5cf86d4c7ba619acefcc71d116f1efdc1e","abstract_canon_sha256":"f30a5231defd105afd577a986aedc98c8ac7d34bc082fd5cd2f62bc88640e052"},"schema_version":"1.0"},"canonical_sha256":"a65ef2c5ef8fa1e6f8278f9b5b3350c5f636ec3797b924f454378b9bd35bfa12","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:37.800172Z","signature_b64":"WPZIQD8Drah+5U/r2TsYMYoMRAczRStRn2f5MDaiUejfmoS/yHYqcorYLotWeda5FJEj5VSv4vqJQ3iXJCP6BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a65ef2c5ef8fa1e6f8278f9b5b3350c5f636ec3797b924f454378b9bd35bfa12","last_reissued_at":"2026-05-18T02:35:37.799675Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:37.799675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"nucl-ex/9912005","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":"2026-05-18T02:35:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"37+j5kkDvCEsnaR/hsSMiZYDM/xm0nAcH6I74I96x5fryisgdchsfPNdwGftVLWSXwU+pPOMBik7K7MAZS/PCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T14:00:25.921999Z"},"content_sha256":"072f335d0716a85280127e0955e32c9ac6315a09187b913c9ea3c1eead36c169","schema_version":"1.0","event_id":"sha256:072f335d0716a85280127e0955e32c9ac6315a09187b913c9ea3c1eead36c169"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:UZPPFRPPR6Q6N6BHR6NVWM2QYX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Meson Production Experiments with Electromagnetic Beams using CLAS","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"S.A. Dytman","submitted_at":"1999-12-08T20:55:35Z","abstract_excerpt":"The CEBAF Large Acceptnace Spectrometer (CLAS) has been taking production data since February, 1998. It takes data for many reactions simultaneously with moderate resolution. Data has been taken for a variety of conditions with polarized and unpolarized beam and target. Preliminary results of the initial experiments run by the CLAS collaboration are shown. The connection with the study of N* resonances is emphasized."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/9912005","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":"2026-05-18T02:35:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rF9DSysMoWWE0mhgeI61rf2emC+EfFZNqMj8DCXZAFD8a6+GYii9OlTIyzeXl0ognXx2NEGNuVPFK02rVvQkCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T14:00:25.922351Z"},"content_sha256":"55612af6bdf88f8f17b29821d630c939859d8ed6c58676ce3cd9fc8d64ce9cbe","schema_version":"1.0","event_id":"sha256:55612af6bdf88f8f17b29821d630c939859d8ed6c58676ce3cd9fc8d64ce9cbe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX/bundle.json","state_url":"https://pith.science/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX/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":"2026-07-04T14:00:25Z","links":{"resolver":"https://pith.science/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX","bundle":"https://pith.science/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX/bundle.json","state":"https://pith.science/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UZPPFRPPR6Q6N6BHR6NVWM2QYX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:UZPPFRPPR6Q6N6BHR6NVWM2QYX","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":"f30a5231defd105afd577a986aedc98c8ac7d34bc082fd5cd2f62bc88640e052","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"1999-12-08T20:55:35Z","title_canon_sha256":"cdf987e1f940731314c09b426732ac5cf86d4c7ba619acefcc71d116f1efdc1e"},"schema_version":"1.0","source":{"id":"nucl-ex/9912005","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/9912005","created_at":"2026-05-18T02:35:37Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/9912005v1","created_at":"2026-05-18T02:35:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/9912005","created_at":"2026-05-18T02:35:37Z"},{"alias_kind":"pith_short_12","alias_value":"UZPPFRPPR6Q6","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"UZPPFRPPR6Q6N6BH","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"UZPPFRPP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:55612af6bdf88f8f17b29821d630c939859d8ed6c58676ce3cd9fc8d64ce9cbe","target":"graph","created_at":"2026-05-18T02:35:37Z","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":"The CEBAF Large Acceptnace Spectrometer (CLAS) has been taking production data since February, 1998. It takes data for many reactions simultaneously with moderate resolution. Data has been taken for a variety of conditions with polarized and unpolarized beam and target. Preliminary results of the initial experiments run by the CLAS collaboration are shown. The connection with the study of N* resonances is emphasized.","authors_text":"S.A. Dytman","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-ex","submitted_at":"1999-12-08T20:55:35Z","title":"Meson Production Experiments with Electromagnetic Beams using CLAS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/9912005","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":"sha256:072f335d0716a85280127e0955e32c9ac6315a09187b913c9ea3c1eead36c169","target":"record","created_at":"2026-05-18T02:35:37Z","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":"f30a5231defd105afd577a986aedc98c8ac7d34bc082fd5cd2f62bc88640e052","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"1999-12-08T20:55:35Z","title_canon_sha256":"cdf987e1f940731314c09b426732ac5cf86d4c7ba619acefcc71d116f1efdc1e"},"schema_version":"1.0","source":{"id":"nucl-ex/9912005","kind":"arxiv","version":1}},"canonical_sha256":"a65ef2c5ef8fa1e6f8278f9b5b3350c5f636ec3797b924f454378b9bd35bfa12","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a65ef2c5ef8fa1e6f8278f9b5b3350c5f636ec3797b924f454378b9bd35bfa12","first_computed_at":"2026-05-18T02:35:37.799675Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:37.799675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WPZIQD8Drah+5U/r2TsYMYoMRAczRStRn2f5MDaiUejfmoS/yHYqcorYLotWeda5FJEj5VSv4vqJQ3iXJCP6BA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:37.800172Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-ex/9912005","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:072f335d0716a85280127e0955e32c9ac6315a09187b913c9ea3c1eead36c169","sha256:55612af6bdf88f8f17b29821d630c939859d8ed6c58676ce3cd9fc8d64ce9cbe"],"state_sha256":"89cc32a0d0d0abe51dc481feeaf7c31a3a425d5209e33376eb718b0c267a98d6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o1UxFwm685egEAgGz4PyxdpoERvh9mHWSdh9QCQSmp3hkyOY9o65d9JerH6VNlGncTsK8tHbrgZoChGSCKrUAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T14:00:25.924244Z","bundle_sha256":"612f2a2422555961d8a0d867935dadc16043c07c5a3aa7b73a4c79642744373a"}}