{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FP6R52SGCWQHSDHVYVNCV7QM2O","short_pith_number":"pith:FP6R52SG","canonical_record":{"source":{"id":"1905.01156","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-03T12:28:13Z","cross_cats_sorted":[],"title_canon_sha256":"55f168b285426f3d1c283a643dd9c1459c9ae5a2677cf8c2dc70b35f34646ca4","abstract_canon_sha256":"219271c9d7f1837dcace74080c7fba29a8e0d06bb600980441e5d5446a74348a"},"schema_version":"1.0"},"canonical_sha256":"2bfd1eea4615a0790cf5c55a2afe0cd3beb6c2483cd8b2e019378b6ebcd92858","source":{"kind":"arxiv","id":"1905.01156","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.01156","created_at":"2026-05-17T23:47:06Z"},{"alias_kind":"arxiv_version","alias_value":"1905.01156v1","created_at":"2026-05-17T23:47:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.01156","created_at":"2026-05-17T23:47:06Z"},{"alias_kind":"pith_short_12","alias_value":"FP6R52SGCWQH","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FP6R52SGCWQHSDHV","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FP6R52SG","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FP6R52SGCWQHSDHVYVNCV7QM2O","target":"record","payload":{"canonical_record":{"source":{"id":"1905.01156","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-03T12:28:13Z","cross_cats_sorted":[],"title_canon_sha256":"55f168b285426f3d1c283a643dd9c1459c9ae5a2677cf8c2dc70b35f34646ca4","abstract_canon_sha256":"219271c9d7f1837dcace74080c7fba29a8e0d06bb600980441e5d5446a74348a"},"schema_version":"1.0"},"canonical_sha256":"2bfd1eea4615a0790cf5c55a2afe0cd3beb6c2483cd8b2e019378b6ebcd92858","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:06.651137Z","signature_b64":"Z0X5E5klkaarTufuy+iFAmbyn7opB9yRPR8KimiQm+GfYkqoPqkf+cV114dmySWNAmBaIH+HSiFWM4gEUJdFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2bfd1eea4615a0790cf5c55a2afe0cd3beb6c2483cd8b2e019378b6ebcd92858","last_reissued_at":"2026-05-17T23:47:06.650464Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:06.650464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.01156","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":"2026-05-17T23:47:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"76qv+GKKRclNzIOGkjT5F2N8iEQ2SEPkLPQr0dJROnqpzEAk554eOdC8YHeT5ufSGoPSNKQYZHDRmAiGq+c6AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:50:12.941311Z"},"content_sha256":"c560999605196565dceda1c1fe09ad3d62bf63c531badae8cf062e0aedc562f5","schema_version":"1.0","event_id":"sha256:c560999605196565dceda1c1fe09ad3d62bf63c531badae8cf062e0aedc562f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FP6R52SGCWQHSDHVYVNCV7QM2O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The thermal, mechanical, structural, and dielectric properties of cometary nuclei after Rosetta","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"B. Davidsson, B. Gundlach, C. Leyrat, C. Snodgrass, D. Marshall, E. K\\\"uhrt, F. Tosi, G. Filacchione, H. H. Fischer, I. Pelivan, J. Knollenberg, M. Knapmeyer, N. Attree, O. Groussin, R. Kokotanekova, T. Spohn, V. Ciarletti, Y. Brouet, Y. Skorov","submitted_at":"2019-05-03T12:28:13Z","abstract_excerpt":"The physical properties of cometary nuclei observed today relate to their complex history and help to constrain their formation and evolution. In this article, we review some of the main physical properties of cometary nuclei and focus in particular on the thermal, mechanical, structural and dielectric properties, emphasizing the progress made during the Rosetta mission. Comets have a low density of 480 $\\pm$ 220 kg m-3 and a low permittivity of 1.9 - 2.0, consistent with a high porosity of 70 - 80 %, are weak with a very low global tensile strength $<$100 Pa, and have a low bulk thermal inert"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.01156","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":"2026-05-17T23:47:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VX4iyJJJR51BjlL9kBRRSOUvOSYeb7YdSAYlTFYHSccLTauGJw5HSpYGwxta0z/RnKdq6ujFgGzOODsBdQeGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:50:12.941941Z"},"content_sha256":"890882c75d3de19f264f534d6c8f042a05fab91611c6cdaa02558496da1f0a11","schema_version":"1.0","event_id":"sha256:890882c75d3de19f264f534d6c8f042a05fab91611c6cdaa02558496da1f0a11"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FP6R52SGCWQHSDHVYVNCV7QM2O/bundle.json","state_url":"https://pith.science/pith/FP6R52SGCWQHSDHVYVNCV7QM2O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FP6R52SGCWQHSDHVYVNCV7QM2O/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":"2026-06-08T01:50:12Z","links":{"resolver":"https://pith.science/pith/FP6R52SGCWQHSDHVYVNCV7QM2O","bundle":"https://pith.science/pith/FP6R52SGCWQHSDHVYVNCV7QM2O/bundle.json","state":"https://pith.science/pith/FP6R52SGCWQHSDHVYVNCV7QM2O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FP6R52SGCWQHSDHVYVNCV7QM2O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FP6R52SGCWQHSDHVYVNCV7QM2O","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":"219271c9d7f1837dcace74080c7fba29a8e0d06bb600980441e5d5446a74348a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-03T12:28:13Z","title_canon_sha256":"55f168b285426f3d1c283a643dd9c1459c9ae5a2677cf8c2dc70b35f34646ca4"},"schema_version":"1.0","source":{"id":"1905.01156","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.01156","created_at":"2026-05-17T23:47:06Z"},{"alias_kind":"arxiv_version","alias_value":"1905.01156v1","created_at":"2026-05-17T23:47:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.01156","created_at":"2026-05-17T23:47:06Z"},{"alias_kind":"pith_short_12","alias_value":"FP6R52SGCWQH","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FP6R52SGCWQHSDHV","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FP6R52SG","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:890882c75d3de19f264f534d6c8f042a05fab91611c6cdaa02558496da1f0a11","target":"graph","created_at":"2026-05-17T23:47:06Z","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 physical properties of cometary nuclei observed today relate to their complex history and help to constrain their formation and evolution. In this article, we review some of the main physical properties of cometary nuclei and focus in particular on the thermal, mechanical, structural and dielectric properties, emphasizing the progress made during the Rosetta mission. Comets have a low density of 480 $\\pm$ 220 kg m-3 and a low permittivity of 1.9 - 2.0, consistent with a high porosity of 70 - 80 %, are weak with a very low global tensile strength $<$100 Pa, and have a low bulk thermal inert","authors_text":"B. Davidsson, B. Gundlach, C. Leyrat, C. Snodgrass, D. Marshall, E. K\\\"uhrt, F. Tosi, G. Filacchione, H. H. Fischer, I. Pelivan, J. Knollenberg, M. Knapmeyer, N. Attree, O. Groussin, R. Kokotanekova, T. Spohn, V. Ciarletti, Y. Brouet, Y. Skorov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-03T12:28:13Z","title":"The thermal, mechanical, structural, and dielectric properties of cometary nuclei after Rosetta"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.01156","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:c560999605196565dceda1c1fe09ad3d62bf63c531badae8cf062e0aedc562f5","target":"record","created_at":"2026-05-17T23:47:06Z","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":"219271c9d7f1837dcace74080c7fba29a8e0d06bb600980441e5d5446a74348a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-05-03T12:28:13Z","title_canon_sha256":"55f168b285426f3d1c283a643dd9c1459c9ae5a2677cf8c2dc70b35f34646ca4"},"schema_version":"1.0","source":{"id":"1905.01156","kind":"arxiv","version":1}},"canonical_sha256":"2bfd1eea4615a0790cf5c55a2afe0cd3beb6c2483cd8b2e019378b6ebcd92858","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2bfd1eea4615a0790cf5c55a2afe0cd3beb6c2483cd8b2e019378b6ebcd92858","first_computed_at":"2026-05-17T23:47:06.650464Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:06.650464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z0X5E5klkaarTufuy+iFAmbyn7opB9yRPR8KimiQm+GfYkqoPqkf+cV114dmySWNAmBaIH+HSiFWM4gEUJdFBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:06.651137Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.01156","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c560999605196565dceda1c1fe09ad3d62bf63c531badae8cf062e0aedc562f5","sha256:890882c75d3de19f264f534d6c8f042a05fab91611c6cdaa02558496da1f0a11"],"state_sha256":"60748f176c33591769c85dcbe665aed232008652e60f9f00967caaede8b23c62"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w+r8QXE4JP07dWikbSrhMsDIeazYdiAMC/rH+vCXf5wfl506OI2S3uikxbYaJ+mjn+DQ7UvpHreJTuO9QjEmBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T01:50:12.945807Z","bundle_sha256":"505f114337829ffcdcb8c33df2c46a9aef7b07852e8bfbc1bf33b39d17c12381"}}