{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:PGMR3QZ7WVSLXEKDJN5IF6JFYM","short_pith_number":"pith:PGMR3QZ7","canonical_record":{"source":{"id":"1901.02806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-09T16:17:19Z","cross_cats_sorted":[],"title_canon_sha256":"e97c332d7369b41cd97207a1ac6f343a3e1532a72758960b551335a129f211cc","abstract_canon_sha256":"0401c49426a7a2cabd4151bba66de2c43ded8a36bc7dc8ee6ee107b727b31520"},"schema_version":"1.0"},"canonical_sha256":"79991dc33fb564bb91434b7a82f925c30a0248370f002facb90db52a686e2ebc","source":{"kind":"arxiv","id":"1901.02806","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02806","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02806v1","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02806","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"pith_short_12","alias_value":"PGMR3QZ7WVSL","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"pith_short_16","alias_value":"PGMR3QZ7WVSLXEKD","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"pith_short_8","alias_value":"PGMR3QZ7","created_at":"2026-07-05T00:06:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:PGMR3QZ7WVSLXEKDJN5IF6JFYM","target":"record","payload":{"canonical_record":{"source":{"id":"1901.02806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-09T16:17:19Z","cross_cats_sorted":[],"title_canon_sha256":"e97c332d7369b41cd97207a1ac6f343a3e1532a72758960b551335a129f211cc","abstract_canon_sha256":"0401c49426a7a2cabd4151bba66de2c43ded8a36bc7dc8ee6ee107b727b31520"},"schema_version":"1.0"},"canonical_sha256":"79991dc33fb564bb91434b7a82f925c30a0248370f002facb90db52a686e2ebc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:06:33.531990Z","signature_b64":"fiGmtRsTJSby2pYZzLm71G5YD7E3yeR3mHswBQLg6PMtLKkaF9PgIXOZJsNfMf4+v+sHFq/qEphmcHGJnOP9Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"79991dc33fb564bb91434b7a82f925c30a0248370f002facb90db52a686e2ebc","last_reissued_at":"2026-07-05T00:06:33.531530Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:06:33.531530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.02806","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":"2026-07-05T00:06:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hHl6aPrpS30LbS3b+HSiChaUr3JcvCWc8ay2NPnGh7zZCzGRpOSAl9nWvhd3sLeexqkpdaVMC5IzyUUFnX7WCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T18:13:18.078844Z"},"content_sha256":"e4381269e23725d470fe5de738dc731a9a7d5188d40d4d021a6f6931b40d4b5f","schema_version":"1.0","event_id":"sha256:e4381269e23725d470fe5de738dc731a9a7d5188d40d4d021a6f6931b40d4b5f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:PGMR3QZ7WVSLXEKDJN5IF6JFYM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining models of activity on comet 67P/Churyumov-Gerasimenko with Rosetta trajectory, rotation, and water production measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Ekkehard K\\\"uhrt, Frank Preusker, Frank Scholten, Jorg Knollenberg, Laurent Jorda, Martin Knapmeyer, Nicholas Attree, Nick Thomas, Olivier Groussin, Paul Hartogh, Rafael Rodrigo, Stefano Mottola, Stubbe Hviid, Yann Brouet","submitted_at":"2019-01-09T16:17:19Z","abstract_excerpt":"Aims. We use four observational data sets, mainly from the Rosetta mission, to constrain the activity pattern of the nucleus of comet 67P/Churyumov-Gerasimenko. Methods. We develop a numerical model that computes the production rate and non-gravitational acceleration of the nucleus of comet 67P as a function of time, taking into account its complex shape with a shape model reconstructed from OSIRIS imagery. We use this model to fit three observational data sets: the trajectory data from flight dynamics; the rotation state, as reconstructed from OSIRIS imagery; and the water production measurem"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02806","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/1901.02806/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":"2026-07-05T00:06:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Uw3kUfgDYoRZBOwV5SQ4kQDwN8A5kNJBFk5iVSxqRtgNAi+OHtBPmlnxU45AlSAvunDWZ6Xd6zkFGPyrtWzqBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T18:13:18.079385Z"},"content_sha256":"7f968e3641431141f0091ea492ade1a4d502ef8077cdfc81ff7aa3f5333d0e71","schema_version":"1.0","event_id":"sha256:7f968e3641431141f0091ea492ade1a4d502ef8077cdfc81ff7aa3f5333d0e71"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM/bundle.json","state_url":"https://pith.science/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM/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":"2026-08-23T18:13:18Z","links":{"resolver":"https://pith.science/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM","bundle":"https://pith.science/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM/bundle.json","state":"https://pith.science/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PGMR3QZ7WVSLXEKDJN5IF6JFYM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PGMR3QZ7WVSLXEKDJN5IF6JFYM","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":"0401c49426a7a2cabd4151bba66de2c43ded8a36bc7dc8ee6ee107b727b31520","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-09T16:17:19Z","title_canon_sha256":"e97c332d7369b41cd97207a1ac6f343a3e1532a72758960b551335a129f211cc"},"schema_version":"1.0","source":{"id":"1901.02806","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02806","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02806v1","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02806","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"pith_short_12","alias_value":"PGMR3QZ7WVSL","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"pith_short_16","alias_value":"PGMR3QZ7WVSLXEKD","created_at":"2026-07-05T00:06:33Z"},{"alias_kind":"pith_short_8","alias_value":"PGMR3QZ7","created_at":"2026-07-05T00:06:33Z"}],"graph_snapshots":[{"event_id":"sha256:7f968e3641431141f0091ea492ade1a4d502ef8077cdfc81ff7aa3f5333d0e71","target":"graph","created_at":"2026-07-05T00:06:33Z","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/1901.02806/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Aims. We use four observational data sets, mainly from the Rosetta mission, to constrain the activity pattern of the nucleus of comet 67P/Churyumov-Gerasimenko. Methods. We develop a numerical model that computes the production rate and non-gravitational acceleration of the nucleus of comet 67P as a function of time, taking into account its complex shape with a shape model reconstructed from OSIRIS imagery. We use this model to fit three observational data sets: the trajectory data from flight dynamics; the rotation state, as reconstructed from OSIRIS imagery; and the water production measurem","authors_text":"Ekkehard K\\\"uhrt, Frank Preusker, Frank Scholten, Jorg Knollenberg, Laurent Jorda, Martin Knapmeyer, Nicholas Attree, Nick Thomas, Olivier Groussin, Paul Hartogh, Rafael Rodrigo, Stefano Mottola, Stubbe Hviid, Yann Brouet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-09T16:17:19Z","title":"Constraining models of activity on comet 67P/Churyumov-Gerasimenko with Rosetta trajectory, rotation, and water production measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02806","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:e4381269e23725d470fe5de738dc731a9a7d5188d40d4d021a6f6931b40d4b5f","target":"record","created_at":"2026-07-05T00:06:33Z","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":"0401c49426a7a2cabd4151bba66de2c43ded8a36bc7dc8ee6ee107b727b31520","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-09T16:17:19Z","title_canon_sha256":"e97c332d7369b41cd97207a1ac6f343a3e1532a72758960b551335a129f211cc"},"schema_version":"1.0","source":{"id":"1901.02806","kind":"arxiv","version":1}},"canonical_sha256":"79991dc33fb564bb91434b7a82f925c30a0248370f002facb90db52a686e2ebc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79991dc33fb564bb91434b7a82f925c30a0248370f002facb90db52a686e2ebc","first_computed_at":"2026-07-05T00:06:33.531530Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:06:33.531530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fiGmtRsTJSby2pYZzLm71G5YD7E3yeR3mHswBQLg6PMtLKkaF9PgIXOZJsNfMf4+v+sHFq/qEphmcHGJnOP9Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T00:06:33.531990Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.02806","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e4381269e23725d470fe5de738dc731a9a7d5188d40d4d021a6f6931b40d4b5f","sha256:7f968e3641431141f0091ea492ade1a4d502ef8077cdfc81ff7aa3f5333d0e71"],"state_sha256":"5cbc96be3c73bb6f0386e0f36b207e8b334817ffa2c4bbdce02a0370fa88c26c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RVNKLNIc0752Jw5WNdbBvP2yNczbo0SOX0YPuzCBoux13TkPfV9UTHATmspXo9nodG7qh9eElyV3LNmIfV7BDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T18:13:18.084435Z","bundle_sha256":"e95be4809be2f3a784fc355cd578461358b9a82e1d3320f39cc85d32f5bcc56d"}}