{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:53VPV6PCFUBW5WSXEFFZ5CVVGQ","short_pith_number":"pith:53VPV6PC","canonical_record":{"source":{"id":"2104.12719","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-26T17:03:48Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"2a91a789c73c2052891ac76173e062c4687217cea07284a986f25241f09ebb46","abstract_canon_sha256":"f94d09fe0f9befde677fb0af5257b6e341f315bc31dc0c4b6a91dc842db0a6c9"},"schema_version":"1.0"},"canonical_sha256":"eeeafaf9e22d036eda57214b9e8ab5342f446e12e02c999c7866fd923377053e","source":{"kind":"arxiv","id":"2104.12719","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.12719","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"arxiv_version","alias_value":"2104.12719v2","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.12719","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"pith_short_12","alias_value":"53VPV6PCFUBW","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"pith_short_16","alias_value":"53VPV6PCFUBW5WSX","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"pith_short_8","alias_value":"53VPV6PC","created_at":"2026-07-05T02:37:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:53VPV6PCFUBW5WSXEFFZ5CVVGQ","target":"record","payload":{"canonical_record":{"source":{"id":"2104.12719","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-26T17:03:48Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"2a91a789c73c2052891ac76173e062c4687217cea07284a986f25241f09ebb46","abstract_canon_sha256":"f94d09fe0f9befde677fb0af5257b6e341f315bc31dc0c4b6a91dc842db0a6c9"},"schema_version":"1.0"},"canonical_sha256":"eeeafaf9e22d036eda57214b9e8ab5342f446e12e02c999c7866fd923377053e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:37:58.937324Z","signature_b64":"6FlY5G/FwCvkBwgfjeEYvxbDojSvR/5VHHbOXKOQpR5l/JTiWdJaWoZF8kUZGCk8rNUqcQJDzCbw/dck/03dDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eeeafaf9e22d036eda57214b9e8ab5342f446e12e02c999c7866fd923377053e","last_reissued_at":"2026-07-05T02:37:58.936965Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:37:58.936965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.12719","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:37:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"baNS04LnnGpNA0ku+mh0BNtIFEHYKV9gtENULn8G6InCJEyyzymcOAtKY6zKTxpC1QOAx9yW5YXeWkXFqjqqDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:28:18.702160Z"},"content_sha256":"071ced1d11f8bd035bb060f07af930527b88131839091aacf9f54d068bd77e17","schema_version":"1.0","event_id":"sha256:071ced1d11f8bd035bb060f07af930527b88131839091aacf9f54d068bd77e17"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:53VPV6PCFUBW5WSXEFFZ5CVVGQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Distribution and intensity of water ice signature in south Xanadu and Tui Regio","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.geo-ph"],"primary_cat":"astro-ph.EP","authors_text":"Alice Le Gall, Beno\\^it Seignovert, Daniel Cordier, Luca Maltagliati, Ma\\'elie Coutelier, Pascal Rannou, S\\'ebastien Rodriguez, Thibaud Cours","submitted_at":"2021-04-26T17:03:48Z","abstract_excerpt":"Titan's surface was revealed by Cassini's instruments, showing the presence of liquid hydrocarbons in lakes, and features like dry riverbed. In order to study the sediment transport in Titan's channels and to map distribution of the water-ice signature in these terrains, we use a radiative transfer model to retrieve the surface albedo, after we estimated VIMS error via an original method. We also establish a criteria related to the intensity of the water ice signature. The tuning of the radiative transfer model shows that the fractal dimension of Titan's aerosols is higher than previously thou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.12719","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.12719/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:37:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Agd7cv0nHtSXdqSyjFjFT2swdJX7qchJzRsCIuqCe2tIlZMlqaXRnuZMBuXQAN0IbeytOeFLCeNFu5kMPldhAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:28:18.703254Z"},"content_sha256":"30f30db104cf58b6dbc06fd70d03764dccfeccb4a1023a36d78f01b3d06be384","schema_version":"1.0","event_id":"sha256:30f30db104cf58b6dbc06fd70d03764dccfeccb4a1023a36d78f01b3d06be384"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ/bundle.json","state_url":"https://pith.science/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ/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":"2026-08-04T17:28:18Z","links":{"resolver":"https://pith.science/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ","bundle":"https://pith.science/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ/bundle.json","state":"https://pith.science/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/53VPV6PCFUBW5WSXEFFZ5CVVGQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:53VPV6PCFUBW5WSXEFFZ5CVVGQ","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":"f94d09fe0f9befde677fb0af5257b6e341f315bc31dc0c4b6a91dc842db0a6c9","cross_cats_sorted":["physics.geo-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-26T17:03:48Z","title_canon_sha256":"2a91a789c73c2052891ac76173e062c4687217cea07284a986f25241f09ebb46"},"schema_version":"1.0","source":{"id":"2104.12719","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.12719","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"arxiv_version","alias_value":"2104.12719v2","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.12719","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"pith_short_12","alias_value":"53VPV6PCFUBW","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"pith_short_16","alias_value":"53VPV6PCFUBW5WSX","created_at":"2026-07-05T02:37:58Z"},{"alias_kind":"pith_short_8","alias_value":"53VPV6PC","created_at":"2026-07-05T02:37:58Z"}],"graph_snapshots":[{"event_id":"sha256:30f30db104cf58b6dbc06fd70d03764dccfeccb4a1023a36d78f01b3d06be384","target":"graph","created_at":"2026-07-05T02:37:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.12719/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Titan's surface was revealed by Cassini's instruments, showing the presence of liquid hydrocarbons in lakes, and features like dry riverbed. In order to study the sediment transport in Titan's channels and to map distribution of the water-ice signature in these terrains, we use a radiative transfer model to retrieve the surface albedo, after we estimated VIMS error via an original method. We also establish a criteria related to the intensity of the water ice signature. The tuning of the radiative transfer model shows that the fractal dimension of Titan's aerosols is higher than previously thou","authors_text":"Alice Le Gall, Beno\\^it Seignovert, Daniel Cordier, Luca Maltagliati, Ma\\'elie Coutelier, Pascal Rannou, S\\'ebastien Rodriguez, Thibaud Cours","cross_cats":["physics.geo-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-26T17:03:48Z","title":"Distribution and intensity of water ice signature in south Xanadu and Tui Regio"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.12719","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":"sha256:071ced1d11f8bd035bb060f07af930527b88131839091aacf9f54d068bd77e17","target":"record","created_at":"2026-07-05T02:37:58Z","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":"f94d09fe0f9befde677fb0af5257b6e341f315bc31dc0c4b6a91dc842db0a6c9","cross_cats_sorted":["physics.geo-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2021-04-26T17:03:48Z","title_canon_sha256":"2a91a789c73c2052891ac76173e062c4687217cea07284a986f25241f09ebb46"},"schema_version":"1.0","source":{"id":"2104.12719","kind":"arxiv","version":2}},"canonical_sha256":"eeeafaf9e22d036eda57214b9e8ab5342f446e12e02c999c7866fd923377053e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eeeafaf9e22d036eda57214b9e8ab5342f446e12e02c999c7866fd923377053e","first_computed_at":"2026-07-05T02:37:58.936965Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:37:58.936965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6FlY5G/FwCvkBwgfjeEYvxbDojSvR/5VHHbOXKOQpR5l/JTiWdJaWoZF8kUZGCk8rNUqcQJDzCbw/dck/03dDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:37:58.937324Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.12719","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:071ced1d11f8bd035bb060f07af930527b88131839091aacf9f54d068bd77e17","sha256:30f30db104cf58b6dbc06fd70d03764dccfeccb4a1023a36d78f01b3d06be384"],"state_sha256":"5954432ba7531a25a75d981b353a046753f4d9635fe79b6d3c5cee5535980fb4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JLDAOAIs3jwlYvMuxiijkwqVDnAifEMSWGZBfogJUUj7dW4SQh5yUQetXz+jQJcxhzqzQwlZP2qKgKyOHt+IAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:28:18.713347Z","bundle_sha256":"e3b6f4a22b7c6a50633bff619f3e21f943eabb1b39441c35f2d5a1a994541f9b"}}