{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:6VFBF5FW5YX7XAKPVEFL4NDRNZ","short_pith_number":"pith:6VFBF5FW","canonical_record":{"source":{"id":"1110.0952","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-10-05T11:12:39Z","cross_cats_sorted":[],"title_canon_sha256":"b7c8acd0521b45741d6c1e6b733edb0db67661a12054b21034442eab5a0b2fc5","abstract_canon_sha256":"9a4c0baba77864a27c388f57f7a34cd86ca5c0ee253537e660e9c68a18c91825"},"schema_version":"1.0"},"canonical_sha256":"f54a12f4b6ee2ffb814fa90abe34716e71a0e9dfc081064a4615c75c17d9f5e8","source":{"kind":"arxiv","id":"1110.0952","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.0952","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"arxiv_version","alias_value":"1110.0952v2","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.0952","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"pith_short_12","alias_value":"6VFBF5FW5YX7","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6VFBF5FW5YX7XAKP","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6VFBF5FW","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:6VFBF5FW5YX7XAKPVEFL4NDRNZ","target":"record","payload":{"canonical_record":{"source":{"id":"1110.0952","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-10-05T11:12:39Z","cross_cats_sorted":[],"title_canon_sha256":"b7c8acd0521b45741d6c1e6b733edb0db67661a12054b21034442eab5a0b2fc5","abstract_canon_sha256":"9a4c0baba77864a27c388f57f7a34cd86ca5c0ee253537e660e9c68a18c91825"},"schema_version":"1.0"},"canonical_sha256":"f54a12f4b6ee2ffb814fa90abe34716e71a0e9dfc081064a4615c75c17d9f5e8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:17.622623Z","signature_b64":"fbeIToy30Dou7P7NmAnz5lYeK9z0ASPAtDROYqIGWgCRrp/BLGDdbfvFiRsbgEI7neqYMaotsKNcwzNJJ+NdBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f54a12f4b6ee2ffb814fa90abe34716e71a0e9dfc081064a4615c75c17d9f5e8","last_reissued_at":"2026-05-18T02:00:17.622053Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:17.622053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.0952","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":"2026-05-18T02:00:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6MpCQdyKnyZM44Di2QxePMWu7uNnYc3nj32QuJI0m1FHGsgZXsDZL+M/373Z50qSo3DGvY+LZDenW9cBA37DDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:36:16.029551Z"},"content_sha256":"b03dfd260c7a3af11b67298b5ff3f16a9560476328ba3c6d9a19347b3d841d20","schema_version":"1.0","event_id":"sha256:b03dfd260c7a3af11b67298b5ff3f16a9560476328ba3c6d9a19347b3d841d20"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:6VFBF5FW5YX7XAKPVEFL4NDRNZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deuterium Fractionation as an Evolutionary Probe in Massive Proto-stellar/cluster Cores","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Huei-Ru Chen, Mei-Yan Wang, Sheng-Yuan Liu, Yu-Nung Su","submitted_at":"2011-10-05T11:12:39Z","abstract_excerpt":"Clouds of high infrared extinction are promising sites of massive star/cluster formation. A large number of cloud cores discovered in recent years allows investigation of possible evolutionary sequence among cores in early phases. We have conducted a survey of deuterium fractionation toward 15 dense cores in various evolutionary stages, from high-mass starless cores to ultracompact Hii regions, in the massive star-forming clouds of high extinction, G34.43+0.24, IRAS 18151-1208, and IRAS 18223-1243, with the Submillimeter Telescope (SMT). Spectra of N2H+ (3 - 2), N2D+ (3 - 2), and C18O (2 - 1) "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.0952","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":""},"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":"2026-05-18T02:00:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RWfcOzxy9CRUg1qEpkJPebkuI6JYHgehPDz/IbtVw/CobFbsIz6OmHutxuh2BM9gGwyf8u6Do8KdNU2yglORDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:36:16.029903Z"},"content_sha256":"9f06ed605180efcacc164b92635ef949d8f7710acc25779866aa967da5b4b4db","schema_version":"1.0","event_id":"sha256:9f06ed605180efcacc164b92635ef949d8f7710acc25779866aa967da5b4b4db"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ/bundle.json","state_url":"https://pith.science/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ/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":"2026-06-02T13:36:16Z","links":{"resolver":"https://pith.science/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ","bundle":"https://pith.science/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ/bundle.json","state":"https://pith.science/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6VFBF5FW5YX7XAKPVEFL4NDRNZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:6VFBF5FW5YX7XAKPVEFL4NDRNZ","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":"9a4c0baba77864a27c388f57f7a34cd86ca5c0ee253537e660e9c68a18c91825","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-10-05T11:12:39Z","title_canon_sha256":"b7c8acd0521b45741d6c1e6b733edb0db67661a12054b21034442eab5a0b2fc5"},"schema_version":"1.0","source":{"id":"1110.0952","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.0952","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"arxiv_version","alias_value":"1110.0952v2","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.0952","created_at":"2026-05-18T02:00:17Z"},{"alias_kind":"pith_short_12","alias_value":"6VFBF5FW5YX7","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6VFBF5FW5YX7XAKP","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6VFBF5FW","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:9f06ed605180efcacc164b92635ef949d8f7710acc25779866aa967da5b4b4db","target":"graph","created_at":"2026-05-18T02:00:17Z","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":"Clouds of high infrared extinction are promising sites of massive star/cluster formation. A large number of cloud cores discovered in recent years allows investigation of possible evolutionary sequence among cores in early phases. We have conducted a survey of deuterium fractionation toward 15 dense cores in various evolutionary stages, from high-mass starless cores to ultracompact Hii regions, in the massive star-forming clouds of high extinction, G34.43+0.24, IRAS 18151-1208, and IRAS 18223-1243, with the Submillimeter Telescope (SMT). Spectra of N2H+ (3 - 2), N2D+ (3 - 2), and C18O (2 - 1) ","authors_text":"Huei-Ru Chen, Mei-Yan Wang, Sheng-Yuan Liu, Yu-Nung Su","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-10-05T11:12:39Z","title":"Deuterium Fractionation as an Evolutionary Probe in Massive Proto-stellar/cluster Cores"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.0952","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:b03dfd260c7a3af11b67298b5ff3f16a9560476328ba3c6d9a19347b3d841d20","target":"record","created_at":"2026-05-18T02:00:17Z","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":"9a4c0baba77864a27c388f57f7a34cd86ca5c0ee253537e660e9c68a18c91825","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-10-05T11:12:39Z","title_canon_sha256":"b7c8acd0521b45741d6c1e6b733edb0db67661a12054b21034442eab5a0b2fc5"},"schema_version":"1.0","source":{"id":"1110.0952","kind":"arxiv","version":2}},"canonical_sha256":"f54a12f4b6ee2ffb814fa90abe34716e71a0e9dfc081064a4615c75c17d9f5e8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f54a12f4b6ee2ffb814fa90abe34716e71a0e9dfc081064a4615c75c17d9f5e8","first_computed_at":"2026-05-18T02:00:17.622053Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:17.622053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fbeIToy30Dou7P7NmAnz5lYeK9z0ASPAtDROYqIGWgCRrp/BLGDdbfvFiRsbgEI7neqYMaotsKNcwzNJJ+NdBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:17.622623Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.0952","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b03dfd260c7a3af11b67298b5ff3f16a9560476328ba3c6d9a19347b3d841d20","sha256:9f06ed605180efcacc164b92635ef949d8f7710acc25779866aa967da5b4b4db"],"state_sha256":"0585a859295bba9d5f6a4e15b2a82a804f1c30292e9ff94eccf6d1ac3b75d7d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ilXnWF1qR3EnQ1msyQ3P9mW3eaG49yuzM2/ZR2+JP0A98+Zk5cc3h5lbKCJmPsXwoCd2gNrKVgG31SoRYU87DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:36:16.031860Z","bundle_sha256":"ec6534d24d091b8a8eef8969c0019b678661700bb4b5e16ce1745c39492ff233"}}