{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:JC6TQFRDOMBHPQFCNZVVXI27C6","short_pith_number":"pith:JC6TQFRD","canonical_record":{"source":{"id":"2002.01346","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-04T15:03:24Z","cross_cats_sorted":[],"title_canon_sha256":"46fc865b4dfd088d3d1a1022de8886d014843112d2c2a3d39ba6d027f46c085b","abstract_canon_sha256":"8b13878ac0eb41559b6057de2574cdf24934af606cafa5a81353ef044633b0d6"},"schema_version":"1.0"},"canonical_sha256":"48bd381623730277c0a26e6b5ba35f17837d0d01c64e803d222a22c986534507","source":{"kind":"arxiv","id":"2002.01346","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.01346","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"arxiv_version","alias_value":"2002.01346v2","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.01346","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"pith_short_12","alias_value":"JC6TQFRDOMBH","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"pith_short_16","alias_value":"JC6TQFRDOMBHPQFC","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"pith_short_8","alias_value":"JC6TQFRD","created_at":"2026-07-05T00:53:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:JC6TQFRDOMBHPQFCNZVVXI27C6","target":"record","payload":{"canonical_record":{"source":{"id":"2002.01346","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-04T15:03:24Z","cross_cats_sorted":[],"title_canon_sha256":"46fc865b4dfd088d3d1a1022de8886d014843112d2c2a3d39ba6d027f46c085b","abstract_canon_sha256":"8b13878ac0eb41559b6057de2574cdf24934af606cafa5a81353ef044633b0d6"},"schema_version":"1.0"},"canonical_sha256":"48bd381623730277c0a26e6b5ba35f17837d0d01c64e803d222a22c986534507","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:53:45.170118Z","signature_b64":"tkiLr7c87BacSsOmhk4JB1OBtx2t3Prn7YeGjDa5THuxXoZ6yMWFsBtqVC9z/wXOskjODWuo9cPYh7wHEe2nCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48bd381623730277c0a26e6b5ba35f17837d0d01c64e803d222a22c986534507","last_reissued_at":"2026-07-05T00:53:45.169630Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:53:45.169630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.01346","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":"2026-07-05T00:53:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ST7oLmwoSLI4H76aFakcHvdrhy3TX1zEcf2zd3MjSjInRjCrULiSIinsMh1egfE4j8+4TYvGHQNZrEkMXs1MAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T15:46:30.277893Z"},"content_sha256":"23aa65c8a7d2009eecf8fe3e216ebd8fd03866dc07ffdf7c0de71ba9d1a6da77","schema_version":"1.0","event_id":"sha256:23aa65c8a7d2009eecf8fe3e216ebd8fd03866dc07ffdf7c0de71ba9d1a6da77"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:JC6TQFRDOMBHPQFCNZVVXI27C6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Physical and chemical modeling of the starless core L1512","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Charl\\`ene Lef\\`evre, Fran\\c{c}ois Lique, Laurent Pagani, Sheng-Jun Lin, Shih-Ping Lai","submitted_at":"2020-02-04T15:03:24Z","abstract_excerpt":"The deuterium fractionation in starless cores gives us a clue to estimate their lifetime scales, thus allowing us to distinguish between different dynamical theories of core formation. Cores also seem to be subject to a differential N2 and CO depletion which was not expected from models. We aim to make a survey of 10 cores to estimate their lifetime scales and depletion profiles in detail. After L183, in Serpens, we present the second cloud of the series, L1512 in Auriga. To constrain the lifetime scale, we perform chemical modeling of the deuteration profiles across L1512 based on dust extinc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.01346","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/2002.01346/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":"2026-07-05T00:53:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PA4Suhem/HCgJDXu8BBJqjH75b6x+fTTkFVFKTMVWUkWHoOkukac6TfaKShaFjflY0Uxzn7Ero1RUMgicxC/Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T15:46:30.278272Z"},"content_sha256":"edf4ab226407046832cafbab4a6a8c850ca8f0d04d51ce3cfd59497ee8fcefb9","schema_version":"1.0","event_id":"sha256:edf4ab226407046832cafbab4a6a8c850ca8f0d04d51ce3cfd59497ee8fcefb9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JC6TQFRDOMBHPQFCNZVVXI27C6/bundle.json","state_url":"https://pith.science/pith/JC6TQFRDOMBHPQFCNZVVXI27C6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JC6TQFRDOMBHPQFCNZVVXI27C6/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":"2026-08-01T15:46:30Z","links":{"resolver":"https://pith.science/pith/JC6TQFRDOMBHPQFCNZVVXI27C6","bundle":"https://pith.science/pith/JC6TQFRDOMBHPQFCNZVVXI27C6/bundle.json","state":"https://pith.science/pith/JC6TQFRDOMBHPQFCNZVVXI27C6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JC6TQFRDOMBHPQFCNZVVXI27C6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:JC6TQFRDOMBHPQFCNZVVXI27C6","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":"8b13878ac0eb41559b6057de2574cdf24934af606cafa5a81353ef044633b0d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-04T15:03:24Z","title_canon_sha256":"46fc865b4dfd088d3d1a1022de8886d014843112d2c2a3d39ba6d027f46c085b"},"schema_version":"1.0","source":{"id":"2002.01346","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.01346","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"arxiv_version","alias_value":"2002.01346v2","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.01346","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"pith_short_12","alias_value":"JC6TQFRDOMBH","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"pith_short_16","alias_value":"JC6TQFRDOMBHPQFC","created_at":"2026-07-05T00:53:45Z"},{"alias_kind":"pith_short_8","alias_value":"JC6TQFRD","created_at":"2026-07-05T00:53:45Z"}],"graph_snapshots":[{"event_id":"sha256:edf4ab226407046832cafbab4a6a8c850ca8f0d04d51ce3cfd59497ee8fcefb9","target":"graph","created_at":"2026-07-05T00:53:45Z","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/2002.01346/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The deuterium fractionation in starless cores gives us a clue to estimate their lifetime scales, thus allowing us to distinguish between different dynamical theories of core formation. Cores also seem to be subject to a differential N2 and CO depletion which was not expected from models. We aim to make a survey of 10 cores to estimate their lifetime scales and depletion profiles in detail. After L183, in Serpens, we present the second cloud of the series, L1512 in Auriga. To constrain the lifetime scale, we perform chemical modeling of the deuteration profiles across L1512 based on dust extinc","authors_text":"Charl\\`ene Lef\\`evre, Fran\\c{c}ois Lique, Laurent Pagani, Sheng-Jun Lin, Shih-Ping Lai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-04T15:03:24Z","title":"Physical and chemical modeling of the starless core L1512"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.01346","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":"sha256:23aa65c8a7d2009eecf8fe3e216ebd8fd03866dc07ffdf7c0de71ba9d1a6da77","target":"record","created_at":"2026-07-05T00:53:45Z","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":"8b13878ac0eb41559b6057de2574cdf24934af606cafa5a81353ef044633b0d6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-04T15:03:24Z","title_canon_sha256":"46fc865b4dfd088d3d1a1022de8886d014843112d2c2a3d39ba6d027f46c085b"},"schema_version":"1.0","source":{"id":"2002.01346","kind":"arxiv","version":2}},"canonical_sha256":"48bd381623730277c0a26e6b5ba35f17837d0d01c64e803d222a22c986534507","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48bd381623730277c0a26e6b5ba35f17837d0d01c64e803d222a22c986534507","first_computed_at":"2026-07-05T00:53:45.169630Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:53:45.169630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tkiLr7c87BacSsOmhk4JB1OBtx2t3Prn7YeGjDa5THuxXoZ6yMWFsBtqVC9z/wXOskjODWuo9cPYh7wHEe2nCg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:53:45.170118Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.01346","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:23aa65c8a7d2009eecf8fe3e216ebd8fd03866dc07ffdf7c0de71ba9d1a6da77","sha256:edf4ab226407046832cafbab4a6a8c850ca8f0d04d51ce3cfd59497ee8fcefb9"],"state_sha256":"6d1b0bcadf561c0b6ab741a067f9e49f2e6f615a5007137e34a1015dd34245bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rRtVnNZUqcdvdvvOeJjlqPZp04NCItmMg0ZN5ASiIh/hka/BITM5DQlZXP5NJ8th8IxikEGsx8UUJnsoTL3GCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T15:46:30.280638Z","bundle_sha256":"d7d373b52233f909cf0cdb0971a02d96caa743b60f15e807412d4daafb76ec72"}}