{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:IUDNLXDFPHBI7OULHLEOR5ER36","short_pith_number":"pith:IUDNLXDF","canonical_record":{"source":{"id":"1012.3652","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2010-12-16T16:04:46Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"9acedcf129d5f17f2845c52b885d85e333b4234c93555ae6dc84e982235b7209","abstract_canon_sha256":"3569f737b601fe5bd560a0bded770ef1e0d96ee2f822daad9a1d54ca950e1b5c"},"schema_version":"1.0"},"canonical_sha256":"4506d5dc6579c28fba8b3ac8e8f491df85d2800da366b69980f316dcffa59577","source":{"kind":"arxiv","id":"1012.3652","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.3652","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"arxiv_version","alias_value":"1012.3652v1","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.3652","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"pith_short_12","alias_value":"IUDNLXDFPHBI","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"IUDNLXDFPHBI7OUL","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"IUDNLXDF","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:IUDNLXDFPHBI7OULHLEOR5ER36","target":"record","payload":{"canonical_record":{"source":{"id":"1012.3652","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2010-12-16T16:04:46Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"9acedcf129d5f17f2845c52b885d85e333b4234c93555ae6dc84e982235b7209","abstract_canon_sha256":"3569f737b601fe5bd560a0bded770ef1e0d96ee2f822daad9a1d54ca950e1b5c"},"schema_version":"1.0"},"canonical_sha256":"4506d5dc6579c28fba8b3ac8e8f491df85d2800da366b69980f316dcffa59577","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:23.700681Z","signature_b64":"r9IS10E+IafVHsGw9oeAgddIvJgF4Uisp75P3CSNpnIlM6nHDZNDCCCv7iCqGTozKQHm9XgeXueoLDeXYJ+eDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4506d5dc6579c28fba8b3ac8e8f491df85d2800da366b69980f316dcffa59577","last_reissued_at":"2026-05-18T02:04:23.700086Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:23.700086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.3652","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":"2026-05-18T02:04:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ArCHsFCBeuonkGnexhoNlSoAzkbuSSA2pMeUTyEzQV9Nkm/nUoIH//WjJhrtl+/RmAQv+zGWGEs7FLt3vBlkDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T18:36:18.821264Z"},"content_sha256":"c1a1d4676d6cdde4cbd444789ef9b055e0efdccd1836a77cd993b47f93694e22","schema_version":"1.0","event_id":"sha256:c1a1d4676d6cdde4cbd444789ef9b055e0efdccd1836a77cd993b47f93694e22"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:IUDNLXDFPHBI7OULHLEOR5ER36","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Water ice in the dark dune spots of Richardson crater on Mars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"physics.geo-ph","authors_text":"A. Kereszturi, F. Schmidt, M. Vincendon","submitted_at":"2010-12-16T16:04:46Z","abstract_excerpt":"In this study we assess the presence, nature and properties of ices - in particular water ice - that occur within these spots using HIRISE and CRISM observations, as well as the LMD Global Climate Model. Our studies focus on Richardson crater (72{\\deg}S, 179{\\deg}E) and cover southern spring and summer (LS 175{\\deg} - 17 341{\\deg}). Three units have been identified of these spots: dark core, gray ring and bright halo. Each unit show characteristic changes as the season progress. In winter, the whole area is covered by CO2 ice with H2O ice contamination. Dark spots form during late winter and e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.3652","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":"2026-05-18T02:04:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xRiMWLqHPbYELcimgKLCRZgKas9XGoN4o/A03Nn5wlMZKlcaqcWd47AsKoQxnNkLvneZKDQ+J5xt9O0drCEwDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T18:36:18.821997Z"},"content_sha256":"fe1a0a181462fb418c7234539f046a064a708243f3fb6a51ae380d0126581efb","schema_version":"1.0","event_id":"sha256:fe1a0a181462fb418c7234539f046a064a708243f3fb6a51ae380d0126581efb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IUDNLXDFPHBI7OULHLEOR5ER36/bundle.json","state_url":"https://pith.science/pith/IUDNLXDFPHBI7OULHLEOR5ER36/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IUDNLXDFPHBI7OULHLEOR5ER36/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":"2026-05-18T18:36:18Z","links":{"resolver":"https://pith.science/pith/IUDNLXDFPHBI7OULHLEOR5ER36","bundle":"https://pith.science/pith/IUDNLXDFPHBI7OULHLEOR5ER36/bundle.json","state":"https://pith.science/pith/IUDNLXDFPHBI7OULHLEOR5ER36/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IUDNLXDFPHBI7OULHLEOR5ER36/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:IUDNLXDFPHBI7OULHLEOR5ER36","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":"3569f737b601fe5bd560a0bded770ef1e0d96ee2f822daad9a1d54ca950e1b5c","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2010-12-16T16:04:46Z","title_canon_sha256":"9acedcf129d5f17f2845c52b885d85e333b4234c93555ae6dc84e982235b7209"},"schema_version":"1.0","source":{"id":"1012.3652","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.3652","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"arxiv_version","alias_value":"1012.3652v1","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.3652","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"pith_short_12","alias_value":"IUDNLXDFPHBI","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"IUDNLXDFPHBI7OUL","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"IUDNLXDF","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:fe1a0a181462fb418c7234539f046a064a708243f3fb6a51ae380d0126581efb","target":"graph","created_at":"2026-05-18T02:04:23Z","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":"In this study we assess the presence, nature and properties of ices - in particular water ice - that occur within these spots using HIRISE and CRISM observations, as well as the LMD Global Climate Model. Our studies focus on Richardson crater (72{\\deg}S, 179{\\deg}E) and cover southern spring and summer (LS 175{\\deg} - 17 341{\\deg}). Three units have been identified of these spots: dark core, gray ring and bright halo. Each unit show characteristic changes as the season progress. In winter, the whole area is covered by CO2 ice with H2O ice contamination. Dark spots form during late winter and e","authors_text":"A. Kereszturi, F. Schmidt, M. Vincendon","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2010-12-16T16:04:46Z","title":"Water ice in the dark dune spots of Richardson crater on Mars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.3652","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:c1a1d4676d6cdde4cbd444789ef9b055e0efdccd1836a77cd993b47f93694e22","target":"record","created_at":"2026-05-18T02:04:23Z","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":"3569f737b601fe5bd560a0bded770ef1e0d96ee2f822daad9a1d54ca950e1b5c","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2010-12-16T16:04:46Z","title_canon_sha256":"9acedcf129d5f17f2845c52b885d85e333b4234c93555ae6dc84e982235b7209"},"schema_version":"1.0","source":{"id":"1012.3652","kind":"arxiv","version":1}},"canonical_sha256":"4506d5dc6579c28fba8b3ac8e8f491df85d2800da366b69980f316dcffa59577","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4506d5dc6579c28fba8b3ac8e8f491df85d2800da366b69980f316dcffa59577","first_computed_at":"2026-05-18T02:04:23.700086Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:23.700086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r9IS10E+IafVHsGw9oeAgddIvJgF4Uisp75P3CSNpnIlM6nHDZNDCCCv7iCqGTozKQHm9XgeXueoLDeXYJ+eDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:23.700681Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.3652","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c1a1d4676d6cdde4cbd444789ef9b055e0efdccd1836a77cd993b47f93694e22","sha256:fe1a0a181462fb418c7234539f046a064a708243f3fb6a51ae380d0126581efb"],"state_sha256":"db45da5bf6cde395212e8bbdefd6204a03e59a1be4a4b8ff5106100655da8132"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VOoIl32ZfaAW2ZyYYeBorgqKZ0ko7Be3BrzLOKCAUFeuBp8jIne+kkWc7HMAQX5MVSzVeZ+t5D2UIvgF10vkAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T18:36:18.824016Z","bundle_sha256":"c54cc4a72afb7d1698886e2d568faba44d409c97647d656a20a238a8a52047d1"}}