{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:NIG2BW5UYJNMF7HQPJTX4Y6X4N","short_pith_number":"pith:NIG2BW5U","canonical_record":{"source":{"id":"1705.03999","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-05-11T03:43:46Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"fb03f3c566f096632f10f2ff045172c12833f1a1a8849cb5eaf63615fe427295","abstract_canon_sha256":"1e45871bc2e5e4c121b5329c449345864195fe2242faa1667779df9e80710419"},"schema_version":"1.0"},"canonical_sha256":"6a0da0dbb4c25ac2fcf07a677e63d7e355c7a364decc8c36d8f6f52d41145e70","source":{"kind":"arxiv","id":"1705.03999","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.03999","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"arxiv_version","alias_value":"1705.03999v1","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.03999","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"pith_short_12","alias_value":"NIG2BW5UYJNM","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"NIG2BW5UYJNMF7HQ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"NIG2BW5U","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:NIG2BW5UYJNMF7HQPJTX4Y6X4N","target":"record","payload":{"canonical_record":{"source":{"id":"1705.03999","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-05-11T03:43:46Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"fb03f3c566f096632f10f2ff045172c12833f1a1a8849cb5eaf63615fe427295","abstract_canon_sha256":"1e45871bc2e5e4c121b5329c449345864195fe2242faa1667779df9e80710419"},"schema_version":"1.0"},"canonical_sha256":"6a0da0dbb4c25ac2fcf07a677e63d7e355c7a364decc8c36d8f6f52d41145e70","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:55.760987Z","signature_b64":"68uMikQ2xSjMnavnDc1DR54Nt3oeAgK2M4VrtCahb2evIF4AVWn4xg/9xmeoThZcXfVSVc8SO6blyHFrdLiWBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a0da0dbb4c25ac2fcf07a677e63d7e355c7a364decc8c36d8f6f52d41145e70","last_reissued_at":"2026-05-18T00:28:55.760378Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:55.760378Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.03999","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":"2026-05-18T00:28:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m6IgV+Ns5eBIqYebsI3RBQiNrReGLxsSXnhb9tJd3i3GgPzFYYV01qJBXUKXn8Wa6g9fZbNNfLX34uz8n9kGDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T10:50:09.134836Z"},"content_sha256":"0efe360cb6d764fd92266f8262440286192748bdf1411c2f74c48a4db4873a03","schema_version":"1.0","event_id":"sha256:0efe360cb6d764fd92266f8262440286192748bdf1411c2f74c48a4db4873a03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:NIG2BW5UYJNMF7HQPJTX4Y6X4N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Geophysical tests for habitability in ice-covered ocean worlds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.geo-ph"],"primary_cat":"astro-ph.EP","authors_text":"Bruce Banerdt, Bruce G. Bills, Christophe Sotin, Fabio Cammarano, Hsin-Hua Huang, Jennifer M. Jackson, Mark P. Panning, Ralph Lorenz, Sharon Kedar, Simon St\\\"ahler, Steven D. Vance, Victor Tsai, William T. Pike","submitted_at":"2017-05-11T03:43:46Z","abstract_excerpt":"Geophysical measurements can reveal the structure of icy ocean worlds and cycling of volatiles. The associated density, temperature, sound speed, and electrical conductivity of such worlds thus characterizes their habitability. To explore the variability and correlation of these parameters, and to provide tools for planning and data analyses, we develop 1-D calculations of internal structure, which use available constraints on the thermodynamics of aqueous MgSO$_4$, NaCl (as seawater), and NH$_3$, water ices, and silicate content. Limits in available thermodynamic data narrow the parameter spa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.03999","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":"2026-05-18T00:28:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9/JZFBvSyUPBs8ssCgTUsBU5xf/GVqmCG6XraPLeORSqUlBBaBIqXqYjjK8PZSVzkI2SWNblc7w0DlX/QJF6Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T10:50:09.135388Z"},"content_sha256":"3ec18a6a7ae0c18c9b6068ed6ab8c4d088c4a0ed614520dba6ce62070be5df3d","schema_version":"1.0","event_id":"sha256:3ec18a6a7ae0c18c9b6068ed6ab8c4d088c4a0ed614520dba6ce62070be5df3d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N/bundle.json","state_url":"https://pith.science/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N/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":"2026-06-07T10:50:09Z","links":{"resolver":"https://pith.science/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N","bundle":"https://pith.science/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N/bundle.json","state":"https://pith.science/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NIG2BW5UYJNMF7HQPJTX4Y6X4N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NIG2BW5UYJNMF7HQPJTX4Y6X4N","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":"1e45871bc2e5e4c121b5329c449345864195fe2242faa1667779df9e80710419","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-05-11T03:43:46Z","title_canon_sha256":"fb03f3c566f096632f10f2ff045172c12833f1a1a8849cb5eaf63615fe427295"},"schema_version":"1.0","source":{"id":"1705.03999","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.03999","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"arxiv_version","alias_value":"1705.03999v1","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.03999","created_at":"2026-05-18T00:28:55Z"},{"alias_kind":"pith_short_12","alias_value":"NIG2BW5UYJNM","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"NIG2BW5UYJNMF7HQ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"NIG2BW5U","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:3ec18a6a7ae0c18c9b6068ed6ab8c4d088c4a0ed614520dba6ce62070be5df3d","target":"graph","created_at":"2026-05-18T00:28:55Z","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":"Geophysical measurements can reveal the structure of icy ocean worlds and cycling of volatiles. The associated density, temperature, sound speed, and electrical conductivity of such worlds thus characterizes their habitability. To explore the variability and correlation of these parameters, and to provide tools for planning and data analyses, we develop 1-D calculations of internal structure, which use available constraints on the thermodynamics of aqueous MgSO$_4$, NaCl (as seawater), and NH$_3$, water ices, and silicate content. Limits in available thermodynamic data narrow the parameter spa","authors_text":"Bruce Banerdt, Bruce G. Bills, Christophe Sotin, Fabio Cammarano, Hsin-Hua Huang, Jennifer M. Jackson, Mark P. Panning, Ralph Lorenz, Sharon Kedar, Simon St\\\"ahler, Steven D. Vance, Victor Tsai, William T. Pike","cross_cats":["physics.geo-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-05-11T03:43:46Z","title":"Geophysical tests for habitability in ice-covered ocean worlds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.03999","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":"sha256:0efe360cb6d764fd92266f8262440286192748bdf1411c2f74c48a4db4873a03","target":"record","created_at":"2026-05-18T00:28:55Z","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":"1e45871bc2e5e4c121b5329c449345864195fe2242faa1667779df9e80710419","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-05-11T03:43:46Z","title_canon_sha256":"fb03f3c566f096632f10f2ff045172c12833f1a1a8849cb5eaf63615fe427295"},"schema_version":"1.0","source":{"id":"1705.03999","kind":"arxiv","version":1}},"canonical_sha256":"6a0da0dbb4c25ac2fcf07a677e63d7e355c7a364decc8c36d8f6f52d41145e70","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a0da0dbb4c25ac2fcf07a677e63d7e355c7a364decc8c36d8f6f52d41145e70","first_computed_at":"2026-05-18T00:28:55.760378Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:28:55.760378Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"68uMikQ2xSjMnavnDc1DR54Nt3oeAgK2M4VrtCahb2evIF4AVWn4xg/9xmeoThZcXfVSVc8SO6blyHFrdLiWBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:28:55.760987Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.03999","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0efe360cb6d764fd92266f8262440286192748bdf1411c2f74c48a4db4873a03","sha256:3ec18a6a7ae0c18c9b6068ed6ab8c4d088c4a0ed614520dba6ce62070be5df3d"],"state_sha256":"ee0a7c7311d370d37617a33aba289ecf0bcda7aa86d406cd99333ff1e9aa1513"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vvg/O6U1kdS02BEVUg7LcvG4UvVbF2sV2nq5TcVWR+/V/0vd1mJzY8vH2tVLgRgiWQU45b1+jT983hyQfVYOAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T10:50:09.138238Z","bundle_sha256":"71ac69da3d97238369a32c44753442b3e2f75a6835fc7140c0c38d3109873e39"}}