{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PVKWCEBQKSAOYDTA5GDSWB6QTO","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":"a7b77362594f6627a704417907a5fe68e51604207593fac9e2958c440946db20","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-26T06:17:30Z","title_canon_sha256":"402648457140056252bbc712947c706f6468198b6c28359168f134f026e93b34"},"schema_version":"1.0","source":{"id":"1510.07372","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07372","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07372v1","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07372","created_at":"2026-05-18T01:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"PVKWCEBQKSAO","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PVKWCEBQKSAOYDTA","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PVKWCEBQ","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:38e7cee22e81518b16d9541d148c4670e157082233e242292b61d3f6e83f1869","target":"graph","created_at":"2026-05-18T01:27:22Z","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":"We present a comprehensive analysis of spatially resolved moderate spectral resolution near infrared spectra obtained with the adaptive optics system at the Keck Observatory. We identify three compositionally distinct end member regions: the trailing hemisphere bullseye, the leading hemisphere upper latitudes, and a third component associated with leading hemisphere chaos units. We interpret the composition of the three end member regions to be dominated by irradiation products, water ice, and evaporite deposits or salt brines, respectively. The third component is associated with geological fe","authors_text":"Kevin P. Hand, Michael E. Brown, Patrick D. Fischer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-26T06:17:30Z","title":"Spatially Resolved Spectroscopy of Europa: The Distinct Spectrum of Large-scale Chaos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07372","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:d454c01d63edfa83cb9f82740417828a148a147265f2832bced8283bd57d90f5","target":"record","created_at":"2026-05-18T01:27:22Z","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":"a7b77362594f6627a704417907a5fe68e51604207593fac9e2958c440946db20","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-26T06:17:30Z","title_canon_sha256":"402648457140056252bbc712947c706f6468198b6c28359168f134f026e93b34"},"schema_version":"1.0","source":{"id":"1510.07372","kind":"arxiv","version":1}},"canonical_sha256":"7d556110305480ec0e60e9872b07d09ba706f2e27842acbb1a429ad93bfc55ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7d556110305480ec0e60e9872b07d09ba706f2e27842acbb1a429ad93bfc55ba","first_computed_at":"2026-05-18T01:27:22.037329Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:22.037329Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nbnHmf8/AiovD96bYJ60fxqRNNn4gLw9mssbtTfQVNU8GZJKrP1dWJDrl2VGSohX9blph2bl/3unfoGxusNMCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:22.037817Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.07372","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d454c01d63edfa83cb9f82740417828a148a147265f2832bced8283bd57d90f5","sha256:38e7cee22e81518b16d9541d148c4670e157082233e242292b61d3f6e83f1869"],"state_sha256":"52c10bd59218b08e6eb0cb45ec2293f092fd8687a38183074047f9359d890b06"}