{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GTFZDLEPJYINZIBD6QDC2IGAV4","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":"5d9d5973ecab35d01028ca470645bb6653f1fa61222e0dbfa42286519931261e","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-02-24T19:56:50Z","title_canon_sha256":"cbf8b31ba6411dadcf0ab764250cc74890531566e2f230ae041226264606ac12"},"schema_version":"1.0","source":{"id":"1602.07649","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07649","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07649v1","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07649","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"pith_short_12","alias_value":"GTFZDLEPJYIN","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GTFZDLEPJYINZIBD","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GTFZDLEP","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:fd1c0c06b89c361499afb31fb8ac80d35f0576ee8983fad9a6925d75af4696ab","target":"graph","created_at":"2026-05-18T01:17:41Z","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":"Cassini's Composite Infrared Spectrometer (CIRS) observed both of Rhea's polar regions during two flybys on 2013/03/09 and 2015/02/10. The results show Rhea's southern winter pole is one of the coldest places directly observed in our solar system: temperatures of 25.4+/-7.4 K and 24.7+/-6.8 K are inferred. The surface temperature of the northern summer pole is warmer: 66.6+/-0.6 K. Assuming the surface thermophysical properties of both polar regions are comparable then these temperatures can be considered a summer and winter seasonal temperature constraint for the polar region. These observati","authors_text":"Anne Verbiscer, Carly Howett, John Spencer, Marcia Segura, Terry Hurford","cross_cats":["physics.geo-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-02-24T19:56:50Z","title":"Thermal properties of Rhea's Poles: Evidence for a Meter-Deep Unconsolidated Subsurface Layer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07649","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:eba74f61da9f99c04a1964a01bade0fb4d1274e4d37f66096915b37fde470722","target":"record","created_at":"2026-05-18T01:17:41Z","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":"5d9d5973ecab35d01028ca470645bb6653f1fa61222e0dbfa42286519931261e","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-02-24T19:56:50Z","title_canon_sha256":"cbf8b31ba6411dadcf0ab764250cc74890531566e2f230ae041226264606ac12"},"schema_version":"1.0","source":{"id":"1602.07649","kind":"arxiv","version":1}},"canonical_sha256":"34cb91ac8f4e10dca023f4062d20c0af34526093bd2ca578217ac1becedf4fb7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"34cb91ac8f4e10dca023f4062d20c0af34526093bd2ca578217ac1becedf4fb7","first_computed_at":"2026-05-18T01:17:41.217775Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:41.217775Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HXB08rwwLrmNSv099Ax+QfTC9tcidXJ6+vdSZHCS0I2TczOQZ4azoatPuutg4uzqbyFou5iVv0ed/RbSCB0RDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:41.218397Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.07649","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eba74f61da9f99c04a1964a01bade0fb4d1274e4d37f66096915b37fde470722","sha256:fd1c0c06b89c361499afb31fb8ac80d35f0576ee8983fad9a6925d75af4696ab"],"state_sha256":"45e087fff14197e8377ae9b89c9f1f08e09ba0609d7d473c4991368d0ce60a1d"}