{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:AFRUC4MD3QCWJAUGGTT4UDLKNF","short_pith_number":"pith:AFRUC4MD","canonical_record":{"source":{"id":"astro-ph/9712158","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-12-11T19:22:27Z","cross_cats_sorted":[],"title_canon_sha256":"eb39c7a95748d63127d48ab2738f203601b51984c0a5a38b42e41a18b3ea2c98","abstract_canon_sha256":"4f91ca40e51485ee9a863d8fe5879dd0d20d9c4445bf1af4145eeab0dcead902"},"schema_version":"1.0"},"canonical_sha256":"0163417183dc0564828634e7ca0d6a697039f5be518d576ff792a22b3c4d35d4","source":{"kind":"arxiv","id":"astro-ph/9712158","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9712158","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9712158v3","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9712158","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"pith_short_12","alias_value":"AFRUC4MD3QCW","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"AFRUC4MD3QCWJAUG","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"AFRUC4MD","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:AFRUC4MD3QCWJAUGGTT4UDLKNF","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9712158","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-12-11T19:22:27Z","cross_cats_sorted":[],"title_canon_sha256":"eb39c7a95748d63127d48ab2738f203601b51984c0a5a38b42e41a18b3ea2c98","abstract_canon_sha256":"4f91ca40e51485ee9a863d8fe5879dd0d20d9c4445bf1af4145eeab0dcead902"},"schema_version":"1.0"},"canonical_sha256":"0163417183dc0564828634e7ca0d6a697039f5be518d576ff792a22b3c4d35d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:35.076156Z","signature_b64":"TJAYMRFiQ04e5bcITxrJI7ke5see5oUTx0RiUudTrfBGcshWQpt5fhpj7lV9KYL2iCi676ZOrZXzQtLc7H/jDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0163417183dc0564828634e7ca0d6a697039f5be518d576ff792a22b3c4d35d4","last_reissued_at":"2026-05-18T02:40:35.075456Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:35.075456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9712158","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":"2026-05-18T02:40:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"64p8tz0PP0NymRXQmn3cIQPmT4UR8qMqFtAoVS6P4iEBv9t5DKul8emASQmbksHcMkjlpzryAcgAnY5k+WUWCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T06:54:32.815704Z"},"content_sha256":"7ef0fc1acdf518902811d10ca5ef794d8caa433b7bdc35f050911e1021bd1584","schema_version":"1.0","event_id":"sha256:7ef0fc1acdf518902811d10ca5ef794d8caa433b7bdc35f050911e1021bd1584"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:AFRUC4MD3QCWJAUGGTT4UDLKNF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Molecular Cloud Structure in the Magellanic Clouds: Effect of Metallicity","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Sterrewacht Leiden, (3) Onsala Space Observatory), D. T. Jaffe (1), Ewine F. van Dishoeck (2), L. E. B. Johansson (3), R. S. Booth (3) ((1) The University of Texas at Austin, Soojong Pak (1)","submitted_at":"1997-12-11T19:22:27Z","abstract_excerpt":"The chemical structure of neutral clouds in low metallicity environments is examined with particular emphasis on the H to H_2 and C+ to CO transitions. We observed near-IR H_2 lines and the CO J=1-0 line from 30 Doradus and N159/N160 in the Large Magellanic Cloud and from DEM S 16, DEM S 37, and LI-SMC 36 in the Small Magellanic Cloud. We find that the H_2 emission is UV-excited and that (weak) CO emission always exists (in our surveyed regions) toward positions where H_2 and [CII] emission have been detected. Using a PDR code and a radiative transfer code, we simulate the emission of line rad"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9712158","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":"2026-05-18T02:40:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ryvcYoDYNQrHdB4sh/KvL3AskSEv1WEI/POxaqo1JYhnuyxLlYwUOoEeW1teap2BAE2kZptoNxuP1gxa2tdvDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T06:54:32.816249Z"},"content_sha256":"48ee948367f2573755d3bc597814fe5598946b1424af23f6185eb5d25937069e","schema_version":"1.0","event_id":"sha256:48ee948367f2573755d3bc597814fe5598946b1424af23f6185eb5d25937069e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF/bundle.json","state_url":"https://pith.science/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF/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":"2026-06-07T06:54:32Z","links":{"resolver":"https://pith.science/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF","bundle":"https://pith.science/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF/bundle.json","state":"https://pith.science/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AFRUC4MD3QCWJAUGGTT4UDLKNF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:AFRUC4MD3QCWJAUGGTT4UDLKNF","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":"4f91ca40e51485ee9a863d8fe5879dd0d20d9c4445bf1af4145eeab0dcead902","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-12-11T19:22:27Z","title_canon_sha256":"eb39c7a95748d63127d48ab2738f203601b51984c0a5a38b42e41a18b3ea2c98"},"schema_version":"1.0","source":{"id":"astro-ph/9712158","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9712158","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9712158v3","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9712158","created_at":"2026-05-18T02:40:35Z"},{"alias_kind":"pith_short_12","alias_value":"AFRUC4MD3QCW","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"AFRUC4MD3QCWJAUG","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"AFRUC4MD","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:48ee948367f2573755d3bc597814fe5598946b1424af23f6185eb5d25937069e","target":"graph","created_at":"2026-05-18T02:40:35Z","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":"The chemical structure of neutral clouds in low metallicity environments is examined with particular emphasis on the H to H_2 and C+ to CO transitions. We observed near-IR H_2 lines and the CO J=1-0 line from 30 Doradus and N159/N160 in the Large Magellanic Cloud and from DEM S 16, DEM S 37, and LI-SMC 36 in the Small Magellanic Cloud. We find that the H_2 emission is UV-excited and that (weak) CO emission always exists (in our surveyed regions) toward positions where H_2 and [CII] emission have been detected. Using a PDR code and a radiative transfer code, we simulate the emission of line rad","authors_text":"(2) Sterrewacht Leiden, (3) Onsala Space Observatory), D. T. Jaffe (1), Ewine F. van Dishoeck (2), L. E. B. Johansson (3), R. S. Booth (3) ((1) The University of Texas at Austin, Soojong Pak (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-12-11T19:22:27Z","title":"Molecular Cloud Structure in the Magellanic Clouds: Effect of Metallicity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9712158","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":"sha256:7ef0fc1acdf518902811d10ca5ef794d8caa433b7bdc35f050911e1021bd1584","target":"record","created_at":"2026-05-18T02:40:35Z","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":"4f91ca40e51485ee9a863d8fe5879dd0d20d9c4445bf1af4145eeab0dcead902","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-12-11T19:22:27Z","title_canon_sha256":"eb39c7a95748d63127d48ab2738f203601b51984c0a5a38b42e41a18b3ea2c98"},"schema_version":"1.0","source":{"id":"astro-ph/9712158","kind":"arxiv","version":3}},"canonical_sha256":"0163417183dc0564828634e7ca0d6a697039f5be518d576ff792a22b3c4d35d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0163417183dc0564828634e7ca0d6a697039f5be518d576ff792a22b3c4d35d4","first_computed_at":"2026-05-18T02:40:35.075456Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:35.075456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TJAYMRFiQ04e5bcITxrJI7ke5see5oUTx0RiUudTrfBGcshWQpt5fhpj7lV9KYL2iCi676ZOrZXzQtLc7H/jDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:35.076156Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9712158","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ef0fc1acdf518902811d10ca5ef794d8caa433b7bdc35f050911e1021bd1584","sha256:48ee948367f2573755d3bc597814fe5598946b1424af23f6185eb5d25937069e"],"state_sha256":"759a979ecee62a74683494ff63f0c8ed53cec2385c000820c8c865993fd89692"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hS2pfIaxW6KCPZD+JMBIbgDwO3IBViMv/XncHq0TRAuXt7Myc5J4/JjGsZueAd9Z1YLANCi4aA7s4v6KM5T1Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T06:54:32.819043Z","bundle_sha256":"ee24c9fd9a84a28e8a951ef9f2dae8ec2cc1a93a61a2405a42ebd2589962b3ab"}}