{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:AB4DR3UGCN7VMQFFT6U2JAGGVA","short_pith_number":"pith:AB4DR3UG","canonical_record":{"source":{"id":"1704.00526","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-03T11:07:14Z","cross_cats_sorted":[],"title_canon_sha256":"b91720bcbe8fc2d7d26b5d20615cfe62f4ac5d16f46c29def57f687e5509e808","abstract_canon_sha256":"332c6ab1d65497f4f6dc7ca83b5994e329a4458509e7da47832230e32fdcdd07"},"schema_version":"1.0"},"canonical_sha256":"007838ee86137f5640a59fa9a480c6a8258506159abddc611eaa0f8ce9496078","source":{"kind":"arxiv","id":"1704.00526","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.00526","created_at":"2026-05-18T00:47:22Z"},{"alias_kind":"arxiv_version","alias_value":"1704.00526v1","created_at":"2026-05-18T00:47:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.00526","created_at":"2026-05-18T00:47:22Z"},{"alias_kind":"pith_short_12","alias_value":"AB4DR3UGCN7V","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"AB4DR3UGCN7VMQFF","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"AB4DR3UG","created_at":"2026-05-18T12:31:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:AB4DR3UGCN7VMQFFT6U2JAGGVA","target":"record","payload":{"canonical_record":{"source":{"id":"1704.00526","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-03T11:07:14Z","cross_cats_sorted":[],"title_canon_sha256":"b91720bcbe8fc2d7d26b5d20615cfe62f4ac5d16f46c29def57f687e5509e808","abstract_canon_sha256":"332c6ab1d65497f4f6dc7ca83b5994e329a4458509e7da47832230e32fdcdd07"},"schema_version":"1.0"},"canonical_sha256":"007838ee86137f5640a59fa9a480c6a8258506159abddc611eaa0f8ce9496078","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:22.086220Z","signature_b64":"JcdTZoS7g6+CR9l8q4OCSd3fDrULU6hoHAl7wvkgfF4fB2uqwbUg0VvMgiBfrA95TTQCix4SG1Fxtowo/KCBCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"007838ee86137f5640a59fa9a480c6a8258506159abddc611eaa0f8ce9496078","last_reissued_at":"2026-05-18T00:47:22.085625Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:22.085625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.00526","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":"2026-05-18T00:47:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d4MbCGzyRc7N4EIQ9XDCRsdXgqkDnKs/cwKS+5gMq68M1Ia3aBbA4/u58kUJjpyb5nAihW1BKe4pOwlSUYLlCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:37:00.906553Z"},"content_sha256":"c4b5b11f5f03bb3b172a04b83ac8b178a27c82919bdd0c186cb89da5a0691908","schema_version":"1.0","event_id":"sha256:c4b5b11f5f03bb3b172a04b83ac8b178a27c82919bdd0c186cb89da5a0691908"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:AB4DR3UGCN7VMQFFT6U2JAGGVA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Aggregate dust particles at comet 67P/Churyumov-Gerasimenko","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Anny-Chantal Levasseur-Regourd, Christian Koeberl, Elmar K. Jessberger, Harald Jeszenszky, Iris Weber, Jens Romstedt, Klaus Torkar, Mark S. Bentley, Ove Havnes, Pascale Ehrenfreund, Roland Schmied, Thurid Mannel","submitted_at":"2017-04-03T11:07:14Z","abstract_excerpt":"Comets are thought to preserve almost pristine dust particles, thus providing a unique sample of the properties of the early solar nebula. The microscopic properties of this dust played a key part in particle aggregation during the formation of the Solar System. Cometary dust was previously considered to comprise irregular, fluffy agglomerates on the basis of interpretations of remote observations in the visible and infrared and the study of chondritic porous interplanetary dust particles that were thought, but not proved, to originate in comets. Although the dust returned by an earlier missio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.00526","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":"2026-05-18T00:47:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zbZT6s4/OImx0vD2Q9tWCn/Cgt/5krOocWAAoRUQo4a7I9/FHsK9036tZoZCqxGB6csnP+zDwr3LSN3VTkVqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:37:00.907347Z"},"content_sha256":"32abe4f1e2f3f33b2c1cbb955df1f6e620e2ab76a86ad9f7dfd976cbe968a759","schema_version":"1.0","event_id":"sha256:32abe4f1e2f3f33b2c1cbb955df1f6e620e2ab76a86ad9f7dfd976cbe968a759"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA/bundle.json","state_url":"https://pith.science/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA/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":"2026-05-27T21:37:00Z","links":{"resolver":"https://pith.science/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA","bundle":"https://pith.science/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA/bundle.json","state":"https://pith.science/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AB4DR3UGCN7VMQFFT6U2JAGGVA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:AB4DR3UGCN7VMQFFT6U2JAGGVA","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":"332c6ab1d65497f4f6dc7ca83b5994e329a4458509e7da47832230e32fdcdd07","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-03T11:07:14Z","title_canon_sha256":"b91720bcbe8fc2d7d26b5d20615cfe62f4ac5d16f46c29def57f687e5509e808"},"schema_version":"1.0","source":{"id":"1704.00526","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.00526","created_at":"2026-05-18T00:47:22Z"},{"alias_kind":"arxiv_version","alias_value":"1704.00526v1","created_at":"2026-05-18T00:47:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.00526","created_at":"2026-05-18T00:47:22Z"},{"alias_kind":"pith_short_12","alias_value":"AB4DR3UGCN7V","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"AB4DR3UGCN7VMQFF","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"AB4DR3UG","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:32abe4f1e2f3f33b2c1cbb955df1f6e620e2ab76a86ad9f7dfd976cbe968a759","target":"graph","created_at":"2026-05-18T00:47:22Z","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":"Comets are thought to preserve almost pristine dust particles, thus providing a unique sample of the properties of the early solar nebula. The microscopic properties of this dust played a key part in particle aggregation during the formation of the Solar System. Cometary dust was previously considered to comprise irregular, fluffy agglomerates on the basis of interpretations of remote observations in the visible and infrared and the study of chondritic porous interplanetary dust particles that were thought, but not proved, to originate in comets. Although the dust returned by an earlier missio","authors_text":"Anny-Chantal Levasseur-Regourd, Christian Koeberl, Elmar K. Jessberger, Harald Jeszenszky, Iris Weber, Jens Romstedt, Klaus Torkar, Mark S. Bentley, Ove Havnes, Pascale Ehrenfreund, Roland Schmied, Thurid Mannel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-03T11:07:14Z","title":"Aggregate dust particles at comet 67P/Churyumov-Gerasimenko"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.00526","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:c4b5b11f5f03bb3b172a04b83ac8b178a27c82919bdd0c186cb89da5a0691908","target":"record","created_at":"2026-05-18T00:47:22Z","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":"332c6ab1d65497f4f6dc7ca83b5994e329a4458509e7da47832230e32fdcdd07","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-03T11:07:14Z","title_canon_sha256":"b91720bcbe8fc2d7d26b5d20615cfe62f4ac5d16f46c29def57f687e5509e808"},"schema_version":"1.0","source":{"id":"1704.00526","kind":"arxiv","version":1}},"canonical_sha256":"007838ee86137f5640a59fa9a480c6a8258506159abddc611eaa0f8ce9496078","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"007838ee86137f5640a59fa9a480c6a8258506159abddc611eaa0f8ce9496078","first_computed_at":"2026-05-18T00:47:22.085625Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:22.085625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JcdTZoS7g6+CR9l8q4OCSd3fDrULU6hoHAl7wvkgfF4fB2uqwbUg0VvMgiBfrA95TTQCix4SG1Fxtowo/KCBCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:22.086220Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.00526","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c4b5b11f5f03bb3b172a04b83ac8b178a27c82919bdd0c186cb89da5a0691908","sha256:32abe4f1e2f3f33b2c1cbb955df1f6e620e2ab76a86ad9f7dfd976cbe968a759"],"state_sha256":"739297bb26b8d8608b0fc3e6087bdb53deed8fd79e5410eca7dcb26c86e2da8f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Cb/C2cPGks4f6busym1qw9UGuUQPg9mTH0WPGqgOfOcldZZkOYxxtcR/8rghikCpd89rbey2i1o8B7Y92PQAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:37:00.911976Z","bundle_sha256":"fd40357555950fdddd0754eeb2a5b8470995462fbbe41b8f2668286f7b0e6150"}}