{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:7PZ2DEA3KSJEE4ZAI45YYWBQ3V","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":"de4ff575da9b4df6f14cd94f9993cd790199976cb574bbf341cb994face2426c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-12-17T10:14:36Z","title_canon_sha256":"14a9b1e08e30b96d0c35082b04f34c187c73197af1a69fdff80cfefb83c5b638"},"schema_version":"1.0","source":{"id":"1412.5318","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.5318","created_at":"2026-05-18T02:27:31Z"},{"alias_kind":"arxiv_version","alias_value":"1412.5318v2","created_at":"2026-05-18T02:27:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.5318","created_at":"2026-05-18T02:27:31Z"},{"alias_kind":"pith_short_12","alias_value":"7PZ2DEA3KSJE","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"7PZ2DEA3KSJEE4ZA","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"7PZ2DEA3","created_at":"2026-05-18T12:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:b420c38a1aa9896b3c620e5b9afec259d8777ddf72c5726c2df0e503d498073d","target":"graph","created_at":"2026-05-18T02:27:31Z","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":"Context: The dwarf planet (1) Ceres - next target of the NASA Dawn mission - is the largest body in the asteroid main belt; although several observations of this body have been performed so far, the presence of surface water ice is still questioned.\n  Aims: Our goal is to better understand the surface composition of Ceres, and to constrain the presence of exposed water ice.\n  Methods: We acquired new visible and near-infrared spectra at the Telescopio Nazionale Galileo (TNG, La Palma, Spain), and reanalyzed literature spectra in the 3-$\\mu$m region.\n  Results: We obtained the first rotationall","authors_text":"C. Lantz, D. Perna, E. Dotto, G. Strazzulla, M. A. Barucci, S. Fornasier, S. Ieva, Z. Ka\\v{n}uchov\\'a","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-12-17T10:14:36Z","title":"Short-term variability on the surface of (1) Ceres. A changing amount of water ice?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.5318","kind":"arxiv","version":2},"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:e065e0aba6ef49386ff06ed87e8601ccd15f5bbe23610b79b2205bd9cfeb81d9","target":"record","created_at":"2026-05-18T02:27:31Z","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":"de4ff575da9b4df6f14cd94f9993cd790199976cb574bbf341cb994face2426c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-12-17T10:14:36Z","title_canon_sha256":"14a9b1e08e30b96d0c35082b04f34c187c73197af1a69fdff80cfefb83c5b638"},"schema_version":"1.0","source":{"id":"1412.5318","kind":"arxiv","version":2}},"canonical_sha256":"fbf3a1901b5492427320473b8c5830dd483bc76780d90805dbdd742d6cf1ecc6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbf3a1901b5492427320473b8c5830dd483bc76780d90805dbdd742d6cf1ecc6","first_computed_at":"2026-05-18T02:27:31.745368Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:27:31.745368Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"75gbz5DRk++3kZvPmd8yGaO2eLdkBrshtSInT0v1zta5HhsHHk2fyq6rJ3AoOiNA1J714knEul7DuNCrXwNoAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:27:31.746180Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.5318","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e065e0aba6ef49386ff06ed87e8601ccd15f5bbe23610b79b2205bd9cfeb81d9","sha256:b420c38a1aa9896b3c620e5b9afec259d8777ddf72c5726c2df0e503d498073d"],"state_sha256":"25d161ad0727b8167713e29807b2a56bd0ddd87767ed5fd0b4e3d0c745c973c4"}