{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:JD5QBPHDBZFG2VI6BWL3LFX6MT","short_pith_number":"pith:JD5QBPHD","canonical_record":{"source":{"id":"0909.4337","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-24T00:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"9e326edaa9cf67ec3ecb027bba743fb8af6f01b1f868492273302cbd6ba29e24","abstract_canon_sha256":"10c9554bae4b64cdd0d5baff58d02f3fe016ed4ff964809f90ad8da21de4736e"},"schema_version":"1.0"},"canonical_sha256":"48fb00bce30e4a6d551e0d97b596fe64df39f71e2385b9f5b837a114429e7d05","source":{"kind":"arxiv","id":"0909.4337","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4337","created_at":"2026-05-18T02:11:38Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4337v1","created_at":"2026-05-18T02:11:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4337","created_at":"2026-05-18T02:11:38Z"},{"alias_kind":"pith_short_12","alias_value":"JD5QBPHDBZFG","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JD5QBPHDBZFG2VI6","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JD5QBPHD","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:JD5QBPHDBZFG2VI6BWL3LFX6MT","target":"record","payload":{"canonical_record":{"source":{"id":"0909.4337","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-24T00:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"9e326edaa9cf67ec3ecb027bba743fb8af6f01b1f868492273302cbd6ba29e24","abstract_canon_sha256":"10c9554bae4b64cdd0d5baff58d02f3fe016ed4ff964809f90ad8da21de4736e"},"schema_version":"1.0"},"canonical_sha256":"48fb00bce30e4a6d551e0d97b596fe64df39f71e2385b9f5b837a114429e7d05","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:38.194295Z","signature_b64":"gE6v5NWJscdUmBn2t7zV3hWbDfA8mioSwUo6eadIj41rm58fMdlzDY3dNDsCCEwAQHaQAI24tsusg6Ta9vx3DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48fb00bce30e4a6d551e0d97b596fe64df39f71e2385b9f5b837a114429e7d05","last_reissued_at":"2026-05-18T02:11:38.193713Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:38.193713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.4337","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":"2026-05-18T02:11:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"beY0LqMussHu5uBfmCKgFT5zjJWQXohkd7LjDgXSsbBgKVRB9WTBnUPqniXEQVRZAws8NG5d2O6JohZex9wLAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:28:27.491156Z"},"content_sha256":"b0d2e2f6e3e841b7bb666836afba01e13f13222013940f20c7b0cbdbdea41ec6","schema_version":"1.0","event_id":"sha256:b0d2e2f6e3e841b7bb666836afba01e13f13222013940f20c7b0cbdbdea41ec6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:JD5QBPHDBZFG2VI6BWL3LFX6MT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The abundance of HNCO and its use as a diagnostic of environment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.J. Markwick, D. M. Tideswell, G. A. Fuller, T. J. Millar","submitted_at":"2009-09-24T00:00:15Z","abstract_excerpt":"We aim to investigate the chemistry and gas phase abundance of HNCO and the variation of the HNCO/CS abundance ratio as a diagnostic of the physics and chemistry in regions of massive star formation. A numerical-chemical model has been developed which self-consistently follows the chemical evolution of a hot core. The model comprises of two distinct stages. An initial collapse phase is immediately followed by an increase in temperature which represents the switch on of a central massive star and the subsequent evolution of the chemistry in a hot, dense gas cloud (the hot core). During the coll"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4337","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":"2026-05-18T02:11:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bmVdN1Nxs63oyIUqkLPhS1Hsqd19UANMVuyGz7M/damfU2bEoyyq2dsLUoR3EFj/MyKQvRT1jVbjP6OjhbUhAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:28:27.491854Z"},"content_sha256":"b8894adfbf68448f50710b67fb43227c9fa0cd2b4609e165898fe290bd0d136d","schema_version":"1.0","event_id":"sha256:b8894adfbf68448f50710b67fb43227c9fa0cd2b4609e165898fe290bd0d136d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT/bundle.json","state_url":"https://pith.science/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT/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":"2026-05-31T13:28:27Z","links":{"resolver":"https://pith.science/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT","bundle":"https://pith.science/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT/bundle.json","state":"https://pith.science/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JD5QBPHDBZFG2VI6BWL3LFX6MT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JD5QBPHDBZFG2VI6BWL3LFX6MT","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":"10c9554bae4b64cdd0d5baff58d02f3fe016ed4ff964809f90ad8da21de4736e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-24T00:00:15Z","title_canon_sha256":"9e326edaa9cf67ec3ecb027bba743fb8af6f01b1f868492273302cbd6ba29e24"},"schema_version":"1.0","source":{"id":"0909.4337","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4337","created_at":"2026-05-18T02:11:38Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4337v1","created_at":"2026-05-18T02:11:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4337","created_at":"2026-05-18T02:11:38Z"},{"alias_kind":"pith_short_12","alias_value":"JD5QBPHDBZFG","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JD5QBPHDBZFG2VI6","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JD5QBPHD","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:b8894adfbf68448f50710b67fb43227c9fa0cd2b4609e165898fe290bd0d136d","target":"graph","created_at":"2026-05-18T02:11:38Z","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":"We aim to investigate the chemistry and gas phase abundance of HNCO and the variation of the HNCO/CS abundance ratio as a diagnostic of the physics and chemistry in regions of massive star formation. A numerical-chemical model has been developed which self-consistently follows the chemical evolution of a hot core. The model comprises of two distinct stages. An initial collapse phase is immediately followed by an increase in temperature which represents the switch on of a central massive star and the subsequent evolution of the chemistry in a hot, dense gas cloud (the hot core). During the coll","authors_text":"A.J. Markwick, D. M. Tideswell, G. A. Fuller, T. J. Millar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-24T00:00:15Z","title":"The abundance of HNCO and its use as a diagnostic of environment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4337","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:b0d2e2f6e3e841b7bb666836afba01e13f13222013940f20c7b0cbdbdea41ec6","target":"record","created_at":"2026-05-18T02:11:38Z","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":"10c9554bae4b64cdd0d5baff58d02f3fe016ed4ff964809f90ad8da21de4736e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-24T00:00:15Z","title_canon_sha256":"9e326edaa9cf67ec3ecb027bba743fb8af6f01b1f868492273302cbd6ba29e24"},"schema_version":"1.0","source":{"id":"0909.4337","kind":"arxiv","version":1}},"canonical_sha256":"48fb00bce30e4a6d551e0d97b596fe64df39f71e2385b9f5b837a114429e7d05","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48fb00bce30e4a6d551e0d97b596fe64df39f71e2385b9f5b837a114429e7d05","first_computed_at":"2026-05-18T02:11:38.193713Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:38.193713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gE6v5NWJscdUmBn2t7zV3hWbDfA8mioSwUo6eadIj41rm58fMdlzDY3dNDsCCEwAQHaQAI24tsusg6Ta9vx3DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:38.194295Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.4337","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0d2e2f6e3e841b7bb666836afba01e13f13222013940f20c7b0cbdbdea41ec6","sha256:b8894adfbf68448f50710b67fb43227c9fa0cd2b4609e165898fe290bd0d136d"],"state_sha256":"b7963f25f27cb39dde1e0a82d70c5b4130643432f0a5c18323850ea24b47f82c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eueVgb9n8O2gHhyrQiEVKgzb0tQkudVVYjwHMg7ymlrTJ5lUrpuOYBiH/zGrIikpgGeYWX6Zyju9nJptXCfrAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T13:28:27.495403Z","bundle_sha256":"741c7fa9808865b2ae7b3501d95d4ffacf98196dd1c282763b2275f79cc7d5d6"}}