{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:5IGROJLVJGUXYDKBGNKR6Y3SUO","short_pith_number":"pith:5IGROJLV","canonical_record":{"source":{"id":"1407.1791","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-07-07T18:21:20Z","cross_cats_sorted":[],"title_canon_sha256":"08ab419351c176a119aea30731d7cd1b65bf6b4eb36bac84aff738b157a93988","abstract_canon_sha256":"b00d5059740b7f90c0592bc7f236a97be78205035a0699ecb83ef99eca0f6847"},"schema_version":"1.0"},"canonical_sha256":"ea0d17257549a97c0d4133551f6372a39e7f65ce7203a2d3a88c12735a38d524","source":{"kind":"arxiv","id":"1407.1791","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.1791","created_at":"2026-05-18T01:42:41Z"},{"alias_kind":"arxiv_version","alias_value":"1407.1791v1","created_at":"2026-05-18T01:42:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.1791","created_at":"2026-05-18T01:42:41Z"},{"alias_kind":"pith_short_12","alias_value":"5IGROJLVJGUX","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5IGROJLVJGUXYDKB","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5IGROJLV","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:5IGROJLVJGUXYDKBGNKR6Y3SUO","target":"record","payload":{"canonical_record":{"source":{"id":"1407.1791","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-07-07T18:21:20Z","cross_cats_sorted":[],"title_canon_sha256":"08ab419351c176a119aea30731d7cd1b65bf6b4eb36bac84aff738b157a93988","abstract_canon_sha256":"b00d5059740b7f90c0592bc7f236a97be78205035a0699ecb83ef99eca0f6847"},"schema_version":"1.0"},"canonical_sha256":"ea0d17257549a97c0d4133551f6372a39e7f65ce7203a2d3a88c12735a38d524","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:41.280614Z","signature_b64":"J/HS1D2vTrRQZavEDqfwRxRP2j/TX7r/hQyszxQG9nqe0mMZeTcXSsWRb07BG254LNsgtqXCNl3TZ2oHkNfgDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea0d17257549a97c0d4133551f6372a39e7f65ce7203a2d3a88c12735a38d524","last_reissued_at":"2026-05-18T01:42:41.280123Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:41.280123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.1791","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":"2026-05-18T01:42:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VETB0woPjS9gYUox1758M9+x+066XPhTwlUhWJE+wvbmou1rEgTcPnkZIsIglVdKAw6qc2sBmeow5MztZWHDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T10:15:10.877268Z"},"content_sha256":"6b5e42bb2d3fd696f4dbd661ab1e6a7ef9d20f27620dd8dde9649f883445de76","schema_version":"1.0","event_id":"sha256:6b5e42bb2d3fd696f4dbd661ab1e6a7ef9d20f27620dd8dde9649f883445de76"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:5IGROJLVJGUXYDKBGNKR6Y3SUO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Titan's past and future: 3D modeling of a pure nitrogen atmosphere and geological implications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Benjamin Charnay, Christophe Sotin, Fran\\c{c}ois Forget, Gabriel Tobie, Robin Wordsworth","submitted_at":"2014-07-07T18:21:20Z","abstract_excerpt":"Several clues indicate that Titan's atmosphere has been depleted in methane during some period of its history, possibly as recently as 0.5-1 billion years ago. It could also happen in the future. Under these conditions, the atmosphere becomes only composed of nitrogen with a range of temperature and pressure allowing liquid or solid nitrogen to condense. Here, we explore these exotic climates throughout Titan's history with a 3D Global Climate Model (GCM) including the nitrogen cycle and the radiative effect of nitrogen clouds. We show that for the last billion years, only small polar nitrogen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.1791","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":"2026-05-18T01:42:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cs64vwZSPd4oq84iVd/2ECVpBfyi+gbpMTpTbZ7+w0/7zdulN9a/NZ3Lz1hlP7slLUc2UJ4hsGbWA0PdzophCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T10:15:10.877652Z"},"content_sha256":"7c2bd6065ab78f8fd1f8288efe075c8c80afd5f674c11e7fc8753c1e2fc34010","schema_version":"1.0","event_id":"sha256:7c2bd6065ab78f8fd1f8288efe075c8c80afd5f674c11e7fc8753c1e2fc34010"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO/bundle.json","state_url":"https://pith.science/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO/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":"2026-06-24T10:15:10Z","links":{"resolver":"https://pith.science/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO","bundle":"https://pith.science/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO/bundle.json","state":"https://pith.science/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5IGROJLVJGUXYDKBGNKR6Y3SUO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5IGROJLVJGUXYDKBGNKR6Y3SUO","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":"b00d5059740b7f90c0592bc7f236a97be78205035a0699ecb83ef99eca0f6847","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-07-07T18:21:20Z","title_canon_sha256":"08ab419351c176a119aea30731d7cd1b65bf6b4eb36bac84aff738b157a93988"},"schema_version":"1.0","source":{"id":"1407.1791","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.1791","created_at":"2026-05-18T01:42:41Z"},{"alias_kind":"arxiv_version","alias_value":"1407.1791v1","created_at":"2026-05-18T01:42:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.1791","created_at":"2026-05-18T01:42:41Z"},{"alias_kind":"pith_short_12","alias_value":"5IGROJLVJGUX","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5IGROJLVJGUXYDKB","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5IGROJLV","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:7c2bd6065ab78f8fd1f8288efe075c8c80afd5f674c11e7fc8753c1e2fc34010","target":"graph","created_at":"2026-05-18T01:42:41Z","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":"Several clues indicate that Titan's atmosphere has been depleted in methane during some period of its history, possibly as recently as 0.5-1 billion years ago. It could also happen in the future. Under these conditions, the atmosphere becomes only composed of nitrogen with a range of temperature and pressure allowing liquid or solid nitrogen to condense. Here, we explore these exotic climates throughout Titan's history with a 3D Global Climate Model (GCM) including the nitrogen cycle and the radiative effect of nitrogen clouds. We show that for the last billion years, only small polar nitrogen","authors_text":"Benjamin Charnay, Christophe Sotin, Fran\\c{c}ois Forget, Gabriel Tobie, Robin Wordsworth","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-07-07T18:21:20Z","title":"Titan's past and future: 3D modeling of a pure nitrogen atmosphere and geological implications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.1791","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":"sha256:6b5e42bb2d3fd696f4dbd661ab1e6a7ef9d20f27620dd8dde9649f883445de76","target":"record","created_at":"2026-05-18T01:42:41Z","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":"b00d5059740b7f90c0592bc7f236a97be78205035a0699ecb83ef99eca0f6847","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-07-07T18:21:20Z","title_canon_sha256":"08ab419351c176a119aea30731d7cd1b65bf6b4eb36bac84aff738b157a93988"},"schema_version":"1.0","source":{"id":"1407.1791","kind":"arxiv","version":1}},"canonical_sha256":"ea0d17257549a97c0d4133551f6372a39e7f65ce7203a2d3a88c12735a38d524","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ea0d17257549a97c0d4133551f6372a39e7f65ce7203a2d3a88c12735a38d524","first_computed_at":"2026-05-18T01:42:41.280123Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:41.280123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J/HS1D2vTrRQZavEDqfwRxRP2j/TX7r/hQyszxQG9nqe0mMZeTcXSsWRb07BG254LNsgtqXCNl3TZ2oHkNfgDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:41.280614Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.1791","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b5e42bb2d3fd696f4dbd661ab1e6a7ef9d20f27620dd8dde9649f883445de76","sha256:7c2bd6065ab78f8fd1f8288efe075c8c80afd5f674c11e7fc8753c1e2fc34010"],"state_sha256":"83b7d583e52f839646b5ec3de31b8ecf22579c7d60e39ec7af94f2e6010b50c3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XiPbgq76t/puqUWuCBXDvxNCefhLGJdPyBNmxpL47D5HmeekTP/OHob7Bki6Cixp6rys5IZZljlGguAg6vp/Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T10:15:10.879814Z","bundle_sha256":"df9809b44c136adb07b31545a476016809c36aa84b4b52c27180d0633cc95781"}}