{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:L2SFKDV644NNKC6FZDRTCLLAWX","short_pith_number":"pith:L2SFKDV6","canonical_record":{"source":{"id":"1907.03008","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-07-05T19:48:18Z","cross_cats_sorted":[],"title_canon_sha256":"a0b8ee50e977ea85481533d42b85646c6cc5c8879025b53e97f99b8fc1c3aee7","abstract_canon_sha256":"25eefcd8094a567176183ac02ea53b6602b115e63b08dbdb67b7963f29cc04a3"},"schema_version":"1.0"},"canonical_sha256":"5ea4550ebee71ad50bc5c8e3312d60b5fa722f10c503a54ee27ee70d27adeb8a","source":{"kind":"arxiv","id":"1907.03008","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.03008","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"arxiv_version","alias_value":"1907.03008v1","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.03008","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"pith_short_12","alias_value":"L2SFKDV644NN","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"pith_short_16","alias_value":"L2SFKDV644NNKC6F","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"pith_short_8","alias_value":"L2SFKDV6","created_at":"2026-07-05T00:06:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:L2SFKDV644NNKC6FZDRTCLLAWX","target":"record","payload":{"canonical_record":{"source":{"id":"1907.03008","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-07-05T19:48:18Z","cross_cats_sorted":[],"title_canon_sha256":"a0b8ee50e977ea85481533d42b85646c6cc5c8879025b53e97f99b8fc1c3aee7","abstract_canon_sha256":"25eefcd8094a567176183ac02ea53b6602b115e63b08dbdb67b7963f29cc04a3"},"schema_version":"1.0"},"canonical_sha256":"5ea4550ebee71ad50bc5c8e3312d60b5fa722f10c503a54ee27ee70d27adeb8a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:06:48.555655Z","signature_b64":"qoWQpgtUnXu064Qz5Ts/6YTA+ZN9e5pVp7hRWLjI7hxuPYioRLQGY5Sh5em/Z2gQ0FkaxF9s/T9Q5uj7oFVlCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ea4550ebee71ad50bc5c8e3312d60b5fa722f10c503a54ee27ee70d27adeb8a","last_reissued_at":"2026-07-05T00:06:48.555178Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:06:48.555178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.03008","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":"2026-07-05T00:06:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HzP3cH7IU/JLDIRqrYDYc0pZor+E0CVKtgnPdEMDHmH898Kw/hMkgUJNOmKqW04Le+I4VOrDTV87UN1tqkVYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:56:16.013493Z"},"content_sha256":"a60606fcdf391c3457f80c96b6405c0eafac3bd0f7644451e6008ddf431810a2","schema_version":"1.0","event_id":"sha256:a60606fcdf391c3457f80c96b6405c0eafac3bd0f7644451e6008ddf431810a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:L2SFKDV644NNKC6FZDRTCLLAWX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Hamburg Meteorite Fall: Fireball trajectory, orbit and dynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Licata, D. Chu, D. E. Moser, D. Vida, J. Mason, J. Steckloff, M. Granvik, M. Mazur, P. G. Brown, S. Hariri, W. Cooke, W. J. Koshak, Z. Krzeminski","submitted_at":"2019-07-05T19:48:18Z","abstract_excerpt":"The Hamburg (H4) meteorite fell on January 17, 2018 at 01:08 UT approximately 10km North of Ann Arbor, Michigan. More than two dozen fragments totaling under one kilogram were recovered, primarily from frozen lake surfaces. The fireball initial velocity was 15.83 $\\pm$ 0.05 km/s, based on four independent records showing the fireball above 50 km altitude. The radiant had a zenith angle of 66.1 $\\pm$ 0.29 degs and an azimuth of 121.56 $\\pm$ 1.2 degs. The resulting low inclination ($<$ 1 deg) Apollo-type orbit has a large aphelion distance and Tisserand value relative to Jupiter (Tj) of $\\sim$ 3"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.03008","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1907.03008/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:06:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bmum4GDBdpNYXLZpAtHgHx5CAECeJpcQSsoKTZU+xN2rBybTY/ZR6NQ7FjChVIa6xRYe6ZbFdqxUcjTqXC+TCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T14:56:16.014006Z"},"content_sha256":"5f5b972b3f994d9b0e59d5310fbf975d4ef3890eb6c01b2a92e68f0b89e0fcfd","schema_version":"1.0","event_id":"sha256:5f5b972b3f994d9b0e59d5310fbf975d4ef3890eb6c01b2a92e68f0b89e0fcfd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L2SFKDV644NNKC6FZDRTCLLAWX/bundle.json","state_url":"https://pith.science/pith/L2SFKDV644NNKC6FZDRTCLLAWX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L2SFKDV644NNKC6FZDRTCLLAWX/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":"2026-08-23T14:56:16Z","links":{"resolver":"https://pith.science/pith/L2SFKDV644NNKC6FZDRTCLLAWX","bundle":"https://pith.science/pith/L2SFKDV644NNKC6FZDRTCLLAWX/bundle.json","state":"https://pith.science/pith/L2SFKDV644NNKC6FZDRTCLLAWX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L2SFKDV644NNKC6FZDRTCLLAWX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:L2SFKDV644NNKC6FZDRTCLLAWX","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":"25eefcd8094a567176183ac02ea53b6602b115e63b08dbdb67b7963f29cc04a3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-07-05T19:48:18Z","title_canon_sha256":"a0b8ee50e977ea85481533d42b85646c6cc5c8879025b53e97f99b8fc1c3aee7"},"schema_version":"1.0","source":{"id":"1907.03008","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.03008","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"arxiv_version","alias_value":"1907.03008v1","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.03008","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"pith_short_12","alias_value":"L2SFKDV644NN","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"pith_short_16","alias_value":"L2SFKDV644NNKC6F","created_at":"2026-07-05T00:06:48Z"},{"alias_kind":"pith_short_8","alias_value":"L2SFKDV6","created_at":"2026-07-05T00:06:48Z"}],"graph_snapshots":[{"event_id":"sha256:5f5b972b3f994d9b0e59d5310fbf975d4ef3890eb6c01b2a92e68f0b89e0fcfd","target":"graph","created_at":"2026-07-05T00:06:48Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1907.03008/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Hamburg (H4) meteorite fell on January 17, 2018 at 01:08 UT approximately 10km North of Ann Arbor, Michigan. More than two dozen fragments totaling under one kilogram were recovered, primarily from frozen lake surfaces. The fireball initial velocity was 15.83 $\\pm$ 0.05 km/s, based on four independent records showing the fireball above 50 km altitude. The radiant had a zenith angle of 66.1 $\\pm$ 0.29 degs and an azimuth of 121.56 $\\pm$ 1.2 degs. The resulting low inclination ($<$ 1 deg) Apollo-type orbit has a large aphelion distance and Tisserand value relative to Jupiter (Tj) of $\\sim$ 3","authors_text":"A. Licata, D. Chu, D. E. Moser, D. Vida, J. Mason, J. Steckloff, M. Granvik, M. Mazur, P. G. Brown, S. Hariri, W. Cooke, W. J. Koshak, Z. Krzeminski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-07-05T19:48:18Z","title":"The Hamburg Meteorite Fall: Fireball trajectory, orbit and dynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.03008","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:a60606fcdf391c3457f80c96b6405c0eafac3bd0f7644451e6008ddf431810a2","target":"record","created_at":"2026-07-05T00:06:48Z","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":"25eefcd8094a567176183ac02ea53b6602b115e63b08dbdb67b7963f29cc04a3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-07-05T19:48:18Z","title_canon_sha256":"a0b8ee50e977ea85481533d42b85646c6cc5c8879025b53e97f99b8fc1c3aee7"},"schema_version":"1.0","source":{"id":"1907.03008","kind":"arxiv","version":1}},"canonical_sha256":"5ea4550ebee71ad50bc5c8e3312d60b5fa722f10c503a54ee27ee70d27adeb8a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ea4550ebee71ad50bc5c8e3312d60b5fa722f10c503a54ee27ee70d27adeb8a","first_computed_at":"2026-07-05T00:06:48.555178Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:06:48.555178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qoWQpgtUnXu064Qz5Ts/6YTA+ZN9e5pVp7hRWLjI7hxuPYioRLQGY5Sh5em/Z2gQ0FkaxF9s/T9Q5uj7oFVlCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:06:48.555655Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.03008","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a60606fcdf391c3457f80c96b6405c0eafac3bd0f7644451e6008ddf431810a2","sha256:5f5b972b3f994d9b0e59d5310fbf975d4ef3890eb6c01b2a92e68f0b89e0fcfd"],"state_sha256":"829dc47e8e521aa0e2901b64e8979e181ffeae48c08ffc0ed041273b0e1f8ac2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sYL/LCe1V/ZiEQKPNNMDqT8/DZPck4L/HiWfQtC0AlXamWw1njHHJlLeiz1RenQ9kAhtYgrnQHzYyZBl0HxiCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T14:56:16.018937Z","bundle_sha256":"06efa25ac291f1c79c8114a7b5040d18cf01b364b0ff143700e125f5fee365b5"}}