{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7PU7QU2F5X7LJA7AG344HSQXTT","short_pith_number":"pith:7PU7QU2F","canonical_record":{"source":{"id":"1807.07609","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-07-19T19:02:27Z","cross_cats_sorted":[],"title_canon_sha256":"73883a10a63a41c3c74d5ad477b499d8b6ac0801a1c1f1113b9f09bf68224119","abstract_canon_sha256":"f916a7157c8313ef372e3f224debe2f09a124dbe969d3293cd1bdbeb0c83a441"},"schema_version":"1.0"},"canonical_sha256":"fbe9f85345edfeb483e036f9c3ca179cdf6c931f920045754567da82a0463ade","source":{"kind":"arxiv","id":"1807.07609","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.07609","created_at":"2026-05-17T23:43:38Z"},{"alias_kind":"arxiv_version","alias_value":"1807.07609v3","created_at":"2026-05-17T23:43:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.07609","created_at":"2026-05-17T23:43:38Z"},{"alias_kind":"pith_short_12","alias_value":"7PU7QU2F5X7L","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7PU7QU2F5X7LJA7A","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7PU7QU2F","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7PU7QU2F5X7LJA7AG344HSQXTT","target":"record","payload":{"canonical_record":{"source":{"id":"1807.07609","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-07-19T19:02:27Z","cross_cats_sorted":[],"title_canon_sha256":"73883a10a63a41c3c74d5ad477b499d8b6ac0801a1c1f1113b9f09bf68224119","abstract_canon_sha256":"f916a7157c8313ef372e3f224debe2f09a124dbe969d3293cd1bdbeb0c83a441"},"schema_version":"1.0"},"canonical_sha256":"fbe9f85345edfeb483e036f9c3ca179cdf6c931f920045754567da82a0463ade","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:38.202667Z","signature_b64":"vlft7OqnfWDGxaHvKkfBEoFEFrO//hux50A2V+IYDktY+LZh7DX/G1VQ8m1v6d/eRs50SbOFiVIXllbuZl4KAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fbe9f85345edfeb483e036f9c3ca179cdf6c931f920045754567da82a0463ade","last_reissued_at":"2026-05-17T23:43:38.201961Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:38.201961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.07609","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:43:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LJ8gjdxDMcCUFb0Ky/UIIFckWAxJklEXOJ2mkDv1rbLGdXYZd5ezOAgb04EJahu/Mk4rFrfRhpbEyKVXcu7xCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T08:59:52.794835Z"},"content_sha256":"fe28a1d30e9e4d0a187831b8e96a5bdc810375fcad80e2562327caceba8e3295","schema_version":"1.0","event_id":"sha256:fe28a1d30e9e4d0a187831b8e96a5bdc810375fcad80e2562327caceba8e3295"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7PU7QU2F5X7LJA7AG344HSQXTT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Atmospheric Escape and the Evolution of Close-in Exoplanets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"James E. Owen","submitted_at":"2018-07-19T19:02:27Z","abstract_excerpt":"Exoplanets with substantial Hydrogen/Helium atmospheres have been discovered in abundance, many residing extremely close to their parent stars. The extreme irradiation levels these atmospheres experience causes them to undergo hydrodynamic atmospheric escape. Ongoing atmospheric escape has been observed to be occurring in a few nearby exoplanet systems through transit spectroscopy both for hot Jupiters and lower-mass super-Earths/mini-Neptunes. Detailed hydrodynamic calculations that incorporate radiative transfer and ionization chemistry are now common in one-dimensional models, and multi-dim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.07609","kind":"arxiv","version":3},"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":"2026-05-17T23:43:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a4jAfiEjm0s/CIV92OXxjqQYAhhWYSWtAkH8GJtytRDreHfy59Uu3A94bkEmANy+efNEsIPOxHPFwjg23BGACQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T08:59:52.795174Z"},"content_sha256":"c2cc491f7d6f9b52d8690143e5920ddfaa73a745d71a7eaf0985859d519b348b","schema_version":"1.0","event_id":"sha256:c2cc491f7d6f9b52d8690143e5920ddfaa73a745d71a7eaf0985859d519b348b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7PU7QU2F5X7LJA7AG344HSQXTT/bundle.json","state_url":"https://pith.science/pith/7PU7QU2F5X7LJA7AG344HSQXTT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7PU7QU2F5X7LJA7AG344HSQXTT/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":"2026-06-27T08:59:52Z","links":{"resolver":"https://pith.science/pith/7PU7QU2F5X7LJA7AG344HSQXTT","bundle":"https://pith.science/pith/7PU7QU2F5X7LJA7AG344HSQXTT/bundle.json","state":"https://pith.science/pith/7PU7QU2F5X7LJA7AG344HSQXTT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7PU7QU2F5X7LJA7AG344HSQXTT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7PU7QU2F5X7LJA7AG344HSQXTT","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":"f916a7157c8313ef372e3f224debe2f09a124dbe969d3293cd1bdbeb0c83a441","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-07-19T19:02:27Z","title_canon_sha256":"73883a10a63a41c3c74d5ad477b499d8b6ac0801a1c1f1113b9f09bf68224119"},"schema_version":"1.0","source":{"id":"1807.07609","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.07609","created_at":"2026-05-17T23:43:38Z"},{"alias_kind":"arxiv_version","alias_value":"1807.07609v3","created_at":"2026-05-17T23:43:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.07609","created_at":"2026-05-17T23:43:38Z"},{"alias_kind":"pith_short_12","alias_value":"7PU7QU2F5X7L","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7PU7QU2F5X7LJA7A","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7PU7QU2F","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:c2cc491f7d6f9b52d8690143e5920ddfaa73a745d71a7eaf0985859d519b348b","target":"graph","created_at":"2026-05-17T23:43:38Z","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":"Exoplanets with substantial Hydrogen/Helium atmospheres have been discovered in abundance, many residing extremely close to their parent stars. The extreme irradiation levels these atmospheres experience causes them to undergo hydrodynamic atmospheric escape. Ongoing atmospheric escape has been observed to be occurring in a few nearby exoplanet systems through transit spectroscopy both for hot Jupiters and lower-mass super-Earths/mini-Neptunes. Detailed hydrodynamic calculations that incorporate radiative transfer and ionization chemistry are now common in one-dimensional models, and multi-dim","authors_text":"James E. Owen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-07-19T19:02:27Z","title":"Atmospheric Escape and the Evolution of Close-in Exoplanets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.07609","kind":"arxiv","version":3},"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:fe28a1d30e9e4d0a187831b8e96a5bdc810375fcad80e2562327caceba8e3295","target":"record","created_at":"2026-05-17T23:43:38Z","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":"f916a7157c8313ef372e3f224debe2f09a124dbe969d3293cd1bdbeb0c83a441","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-07-19T19:02:27Z","title_canon_sha256":"73883a10a63a41c3c74d5ad477b499d8b6ac0801a1c1f1113b9f09bf68224119"},"schema_version":"1.0","source":{"id":"1807.07609","kind":"arxiv","version":3}},"canonical_sha256":"fbe9f85345edfeb483e036f9c3ca179cdf6c931f920045754567da82a0463ade","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbe9f85345edfeb483e036f9c3ca179cdf6c931f920045754567da82a0463ade","first_computed_at":"2026-05-17T23:43:38.201961Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:38.201961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vlft7OqnfWDGxaHvKkfBEoFEFrO//hux50A2V+IYDktY+LZh7DX/G1VQ8m1v6d/eRs50SbOFiVIXllbuZl4KAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:38.202667Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.07609","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe28a1d30e9e4d0a187831b8e96a5bdc810375fcad80e2562327caceba8e3295","sha256:c2cc491f7d6f9b52d8690143e5920ddfaa73a745d71a7eaf0985859d519b348b"],"state_sha256":"be2ae76228efcec05f7b8930b16dafe607d8798d55a631e804899e122a2a60f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Own80e41eshfCo+2Rn0sB8mJe1v1/oHEqi78AVJuQO8f9TqL1/VqNMdb7Jt3ILuLtnQREeo7x9uBk4ihf7F3Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T08:59:52.797097Z","bundle_sha256":"f4c7cc533388c53c96f31b230dbfecb27c070ed8c77e5a912bf211c195e0ce48"}}