{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:OTGVT62CQSVCVKBJCJVJZHC6AW","short_pith_number":"pith:OTGVT62C","canonical_record":{"source":{"id":"astro-ph/0012095","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-05T10:02:11Z","cross_cats_sorted":[],"title_canon_sha256":"a7352f4ec0359070d47f6d9fdd611f826db4d62f5645eb7c369f878849e2597d","abstract_canon_sha256":"a2bea7a192ad7da4bf1f3b65c6c4bc1c8e6902d3b17beea38921894c90994e2c"},"schema_version":"1.0"},"canonical_sha256":"74cd59fb4284aa2aa829126a9c9c5e05a4f9552443726c4106cfffc2332b47d8","source":{"kind":"arxiv","id":"astro-ph/0012095","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0012095","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0012095v1","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0012095","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"pith_short_12","alias_value":"OTGVT62CQSVC","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"OTGVT62CQSVCVKBJ","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"OTGVT62C","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:OTGVT62CQSVCVKBJCJVJZHC6AW","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0012095","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-05T10:02:11Z","cross_cats_sorted":[],"title_canon_sha256":"a7352f4ec0359070d47f6d9fdd611f826db4d62f5645eb7c369f878849e2597d","abstract_canon_sha256":"a2bea7a192ad7da4bf1f3b65c6c4bc1c8e6902d3b17beea38921894c90994e2c"},"schema_version":"1.0"},"canonical_sha256":"74cd59fb4284aa2aa829126a9c9c5e05a4f9552443726c4106cfffc2332b47d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:45.206217Z","signature_b64":"TBGC3wuNmaxzKBGc9jE9ZBxmWLQfpmpsNB0ewa5oFCKdfBgSnxpNVRJqvQIOuv5izHJgPR4oxKJ97oU6MvzTBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74cd59fb4284aa2aa829126a9c9c5e05a4f9552443726c4106cfffc2332b47d8","last_reissued_at":"2026-05-18T01:40:45.205517Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:45.205517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0012095","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":"2026-05-18T01:40:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ah6QslxGR01spDHFuuQkoR+jpIdfR/+iHwXIspUwIBbe36n0BM6by+b/WriSU0PpbM8ShEPHasY3LikD5s/6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T23:39:39.925206Z"},"content_sha256":"c3f423655344d3bd09894c6d0b837dffdf7814b910d80d244822eb0b63ca6db1","schema_version":"1.0","event_id":"sha256:c3f423655344d3bd09894c6d0b837dffdf7814b910d80d244822eb0b63ca6db1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:OTGVT62CQSVCVKBJCJVJZHC6AW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The initial conditions of isolated star formation: IV - C18O observations and modelling of the pre-stellar core L1689B","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Ward-Thompson, N. E. Jessop","submitted_at":"2000-12-05T10:02:11Z","abstract_excerpt":"We present C18O observations of the pre-stellar core L1689B, in the (J=3-2) and (J=2-1) rotational transitions, taken at the James Clerk Maxwell Telescope in Hawaii. We use a lambda-iteration radiative transfer code to model the data. We adopt a similar form of radial density profile to that which we have found in all pre-stellar cores, with a `flat' inner profile, steepening towards the edge, but we make the gradient of the `flat' region a free parameter. We find that the core is close to virial equilibrium, but there is tentative evidence for core contraction. We allow the temperature to var"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0012095","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":"2026-05-18T01:40:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jvseAgVGVp4CtqTfqHC0yoTI1PxmWB6gcLsPtcjSZr0RHdDFTzmn4inMYXJok8UZUkX6G/E+ZA8edd0T7FI8Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T23:39:39.925913Z"},"content_sha256":"78a1cabf3c5beff886b73fbbd79eeefd3bf27fdc14f2532d3fbd64e8d44e5a44","schema_version":"1.0","event_id":"sha256:78a1cabf3c5beff886b73fbbd79eeefd3bf27fdc14f2532d3fbd64e8d44e5a44"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OTGVT62CQSVCVKBJCJVJZHC6AW/bundle.json","state_url":"https://pith.science/pith/OTGVT62CQSVCVKBJCJVJZHC6AW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OTGVT62CQSVCVKBJCJVJZHC6AW/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":"2026-05-29T23:39:39Z","links":{"resolver":"https://pith.science/pith/OTGVT62CQSVCVKBJCJVJZHC6AW","bundle":"https://pith.science/pith/OTGVT62CQSVCVKBJCJVJZHC6AW/bundle.json","state":"https://pith.science/pith/OTGVT62CQSVCVKBJCJVJZHC6AW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OTGVT62CQSVCVKBJCJVJZHC6AW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:OTGVT62CQSVCVKBJCJVJZHC6AW","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":"a2bea7a192ad7da4bf1f3b65c6c4bc1c8e6902d3b17beea38921894c90994e2c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-05T10:02:11Z","title_canon_sha256":"a7352f4ec0359070d47f6d9fdd611f826db4d62f5645eb7c369f878849e2597d"},"schema_version":"1.0","source":{"id":"astro-ph/0012095","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0012095","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0012095v1","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0012095","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"pith_short_12","alias_value":"OTGVT62CQSVC","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"OTGVT62CQSVCVKBJ","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"OTGVT62C","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:78a1cabf3c5beff886b73fbbd79eeefd3bf27fdc14f2532d3fbd64e8d44e5a44","target":"graph","created_at":"2026-05-18T01:40:45Z","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"},"paper":{"abstract_excerpt":"We present C18O observations of the pre-stellar core L1689B, in the (J=3-2) and (J=2-1) rotational transitions, taken at the James Clerk Maxwell Telescope in Hawaii. We use a lambda-iteration radiative transfer code to model the data. We adopt a similar form of radial density profile to that which we have found in all pre-stellar cores, with a `flat' inner profile, steepening towards the edge, but we make the gradient of the `flat' region a free parameter. We find that the core is close to virial equilibrium, but there is tentative evidence for core contraction. We allow the temperature to var","authors_text":"D. Ward-Thompson, N. E. Jessop","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-12-05T10:02:11Z","title":"The initial conditions of isolated star formation: IV - C18O observations and modelling of the pre-stellar core L1689B"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0012095","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:c3f423655344d3bd09894c6d0b837dffdf7814b910d80d244822eb0b63ca6db1","target":"record","created_at":"2026-05-18T01:40:45Z","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":"a2bea7a192ad7da4bf1f3b65c6c4bc1c8e6902d3b17beea38921894c90994e2c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-05T10:02:11Z","title_canon_sha256":"a7352f4ec0359070d47f6d9fdd611f826db4d62f5645eb7c369f878849e2597d"},"schema_version":"1.0","source":{"id":"astro-ph/0012095","kind":"arxiv","version":1}},"canonical_sha256":"74cd59fb4284aa2aa829126a9c9c5e05a4f9552443726c4106cfffc2332b47d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74cd59fb4284aa2aa829126a9c9c5e05a4f9552443726c4106cfffc2332b47d8","first_computed_at":"2026-05-18T01:40:45.205517Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:45.205517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TBGC3wuNmaxzKBGc9jE9ZBxmWLQfpmpsNB0ewa5oFCKdfBgSnxpNVRJqvQIOuv5izHJgPR4oxKJ97oU6MvzTBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:45.206217Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0012095","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c3f423655344d3bd09894c6d0b837dffdf7814b910d80d244822eb0b63ca6db1","sha256:78a1cabf3c5beff886b73fbbd79eeefd3bf27fdc14f2532d3fbd64e8d44e5a44"],"state_sha256":"36d580b77ebaed23026950cb4e0c65638494a9aee6918063a21634740491f72c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/soeTa9EyxhQqoX+sjryK8wcnvTp3bLueww4UHmVpy61/u3yeVM+n8JAQ6HEYgRLmGfReS53aAag/YAEkIr0DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T23:39:39.930703Z","bundle_sha256":"499eaa4ca086d937c069d3ead6ae5f35eb5cb6ab271a71f520f8ee3f1789d69a"}}