{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KEYX6EU4PSSWDNPUBYMIN75OGG","short_pith_number":"pith:KEYX6EU4","canonical_record":{"source":{"id":"1509.03746","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-09-12T14:08:21Z","cross_cats_sorted":[],"title_canon_sha256":"807e542b2604b178e1a5c9bc477f8f005f628e6ced4d8973625f9550ca677d57","abstract_canon_sha256":"5617208be9aaaf57c706462d89ab37af7752fd18f3af77acb18d8281e5fec828"},"schema_version":"1.0"},"canonical_sha256":"51317f129c7ca561b5f40e1886ffae31b9d7adaf7c88af652ddcdeb4b2f0bb11","source":{"kind":"arxiv","id":"1509.03746","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03746","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03746v1","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03746","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"pith_short_12","alias_value":"KEYX6EU4PSSW","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"KEYX6EU4PSSWDNPU","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"KEYX6EU4","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KEYX6EU4PSSWDNPUBYMIN75OGG","target":"record","payload":{"canonical_record":{"source":{"id":"1509.03746","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-09-12T14:08:21Z","cross_cats_sorted":[],"title_canon_sha256":"807e542b2604b178e1a5c9bc477f8f005f628e6ced4d8973625f9550ca677d57","abstract_canon_sha256":"5617208be9aaaf57c706462d89ab37af7752fd18f3af77acb18d8281e5fec828"},"schema_version":"1.0"},"canonical_sha256":"51317f129c7ca561b5f40e1886ffae31b9d7adaf7c88af652ddcdeb4b2f0bb11","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:28:46.149081Z","signature_b64":"nf0sBHN5yPU3Cxdd5bMTpIk1yiaZ7UbdNWDRM4LbREocaYMQcKWrJplGeU1ThOwY6zGvCWIPBqvQjTjGL5CCCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51317f129c7ca561b5f40e1886ffae31b9d7adaf7c88af652ddcdeb4b2f0bb11","last_reissued_at":"2026-05-18T01:28:46.148566Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:28:46.148566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.03746","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":"2026-05-18T01:28:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kJ06tZu0ycQxlLdragBs8BRfI7WSZPkymXA7UOIwjS4Oh4qyc40Oc5nl7+bS4d6d3jbvpyjIYzLejVUlWdcSAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T09:49:53.396384Z"},"content_sha256":"7d0dffe770b897208a0eb733e14f10bdd354f2cb941955afca412389498ddde5","schema_version":"1.0","event_id":"sha256:7d0dffe770b897208a0eb733e14f10bdd354f2cb941955afca412389498ddde5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KEYX6EU4PSSWDNPUBYMIN75OGG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rapid Water Loss can Extend the Lifetime of the Planetary Habitability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"H. Genda, K. J. Zahnle, T. Kodama, Y. Abe","submitted_at":"2015-09-12T14:08:21Z","abstract_excerpt":"Two habitable planetary states are proposed: an aqua planet like the Earth and a land planet that has a small amount of water. Land planets keep liquid water under larger solar radiation compared to aqua planets. Water loss may change an aqua planet into a land planet, and the planet can remain habitable for a longer time than had it stayed an aqua planet. We calculate planetary evolution with hydrogen escape for different initial water inventories and different distances from the central star. We find that there are two conditions to evolve an aqua planet into a land planet: the critical amou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03746","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":"2026-05-18T01:28:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F0qj09qDg9BLO3WkYCvlF4GCfNbra0xvV3WgjYv9h455bS247Q+QidnFwSrHBUalSJyykrRFUNeQozXFM6PkAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T09:49:53.396729Z"},"content_sha256":"9b4ef5ac8e694335d8b818ea64906853853cb9dff201108c71e6682feedcc89b","schema_version":"1.0","event_id":"sha256:9b4ef5ac8e694335d8b818ea64906853853cb9dff201108c71e6682feedcc89b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KEYX6EU4PSSWDNPUBYMIN75OGG/bundle.json","state_url":"https://pith.science/pith/KEYX6EU4PSSWDNPUBYMIN75OGG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KEYX6EU4PSSWDNPUBYMIN75OGG/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":"2026-06-08T09:49:53Z","links":{"resolver":"https://pith.science/pith/KEYX6EU4PSSWDNPUBYMIN75OGG","bundle":"https://pith.science/pith/KEYX6EU4PSSWDNPUBYMIN75OGG/bundle.json","state":"https://pith.science/pith/KEYX6EU4PSSWDNPUBYMIN75OGG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KEYX6EU4PSSWDNPUBYMIN75OGG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KEYX6EU4PSSWDNPUBYMIN75OGG","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":"5617208be9aaaf57c706462d89ab37af7752fd18f3af77acb18d8281e5fec828","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-09-12T14:08:21Z","title_canon_sha256":"807e542b2604b178e1a5c9bc477f8f005f628e6ced4d8973625f9550ca677d57"},"schema_version":"1.0","source":{"id":"1509.03746","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03746","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03746v1","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03746","created_at":"2026-05-18T01:28:46Z"},{"alias_kind":"pith_short_12","alias_value":"KEYX6EU4PSSW","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"KEYX6EU4PSSWDNPU","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"KEYX6EU4","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:9b4ef5ac8e694335d8b818ea64906853853cb9dff201108c71e6682feedcc89b","target":"graph","created_at":"2026-05-18T01:28:46Z","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":"Two habitable planetary states are proposed: an aqua planet like the Earth and a land planet that has a small amount of water. Land planets keep liquid water under larger solar radiation compared to aqua planets. Water loss may change an aqua planet into a land planet, and the planet can remain habitable for a longer time than had it stayed an aqua planet. We calculate planetary evolution with hydrogen escape for different initial water inventories and different distances from the central star. We find that there are two conditions to evolve an aqua planet into a land planet: the critical amou","authors_text":"H. Genda, K. J. Zahnle, T. Kodama, Y. Abe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-09-12T14:08:21Z","title":"Rapid Water Loss can Extend the Lifetime of the Planetary Habitability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03746","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":"sha256:7d0dffe770b897208a0eb733e14f10bdd354f2cb941955afca412389498ddde5","target":"record","created_at":"2026-05-18T01:28:46Z","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":"5617208be9aaaf57c706462d89ab37af7752fd18f3af77acb18d8281e5fec828","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-09-12T14:08:21Z","title_canon_sha256":"807e542b2604b178e1a5c9bc477f8f005f628e6ced4d8973625f9550ca677d57"},"schema_version":"1.0","source":{"id":"1509.03746","kind":"arxiv","version":1}},"canonical_sha256":"51317f129c7ca561b5f40e1886ffae31b9d7adaf7c88af652ddcdeb4b2f0bb11","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51317f129c7ca561b5f40e1886ffae31b9d7adaf7c88af652ddcdeb4b2f0bb11","first_computed_at":"2026-05-18T01:28:46.148566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:28:46.148566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nf0sBHN5yPU3Cxdd5bMTpIk1yiaZ7UbdNWDRM4LbREocaYMQcKWrJplGeU1ThOwY6zGvCWIPBqvQjTjGL5CCCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:28:46.149081Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03746","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d0dffe770b897208a0eb733e14f10bdd354f2cb941955afca412389498ddde5","sha256:9b4ef5ac8e694335d8b818ea64906853853cb9dff201108c71e6682feedcc89b"],"state_sha256":"11d0a61b08aeaf26848fe3019cbdd7eef93d33aa722c13b02484738946fa5b3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Qyk9gQNgnn+UPUCyAkiYBpaBQXfttpP7pbJ4AyzYAVNKINJQBKtLCgpd6fngRDdCtMzWijbhQXZoluaUFPzAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T09:49:53.398614Z","bundle_sha256":"34e8d8bfdccbdc4f1d7f38ebd95799683f151483f82eac4a5c0c33a573cdf42d"}}