{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:N7AG7IGE25N4ERHTWZJE5UJF3T","short_pith_number":"pith:N7AG7IGE","canonical_record":{"source":{"id":"astro-ph/0409479","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-20T16:23:38Z","cross_cats_sorted":[],"title_canon_sha256":"6739f1c5b807333fbe970fe562a26c93d988b6590e9d96fb8e82b11a7a7ee3a4","abstract_canon_sha256":"6a8f0dd988974927f478bd12ffba3d4f0bb2dc74491d0281395b3ec97099694c"},"schema_version":"1.0"},"canonical_sha256":"6fc06fa0c4d75bc244f3b6524ed125dcda4dc37db6e987be6c89df6a5a6ce304","source":{"kind":"arxiv","id":"astro-ph/0409479","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409479","created_at":"2026-05-18T04:33:50Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409479v1","created_at":"2026-05-18T04:33:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409479","created_at":"2026-05-18T04:33:50Z"},{"alias_kind":"pith_short_12","alias_value":"N7AG7IGE25N4","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"N7AG7IGE25N4ERHT","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"N7AG7IGE","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:N7AG7IGE25N4ERHTWZJE5UJF3T","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0409479","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-20T16:23:38Z","cross_cats_sorted":[],"title_canon_sha256":"6739f1c5b807333fbe970fe562a26c93d988b6590e9d96fb8e82b11a7a7ee3a4","abstract_canon_sha256":"6a8f0dd988974927f478bd12ffba3d4f0bb2dc74491d0281395b3ec97099694c"},"schema_version":"1.0"},"canonical_sha256":"6fc06fa0c4d75bc244f3b6524ed125dcda4dc37db6e987be6c89df6a5a6ce304","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:33:50.954399Z","signature_b64":"1tSJhq+LNeCXTWmWYFhoV1DzjHvdq1WqWBhPJ9BgbZidMnCm9Yt1xXSH742P+NjWMVbyrEjVuViSbTd2+MffBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6fc06fa0c4d75bc244f3b6524ed125dcda4dc37db6e987be6c89df6a5a6ce304","last_reissued_at":"2026-05-18T04:33:50.953847Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:33:50.953847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0409479","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":"2026-05-18T04:33:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GuMVCiSlJnThKWl8AIhQrff+eiAohzk+glFxvIIkFPEDE24tCxYNU2Sk5we4zA829R3A2zNEytLG18dWQvnQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:28:44.765563Z"},"content_sha256":"7c10e52fc886000e6ec014e0cfa840b86b19e53e14e0a1121025b63c18af7620","schema_version":"1.0","event_id":"sha256:7c10e52fc886000e6ec014e0cfa840b86b19e53e14e0a1121025b63c18af7620"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:N7AG7IGE25N4ERHTWZJE5UJF3T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxy Evolution and Cosmology with the Square Kilometre Array","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C.A. Blake, C.M. Baugh, F.B. Abdalla, J.M. van der Hulst, L.J. Greenhill, S.L. Bridle, S. Rawlings","submitted_at":"2004-09-20T16:23:38Z","abstract_excerpt":"The present-day Universe is seemingly dominated by dark energy and dark matter, but mapping the normal (baryonic) content remains vital for both astrophysics - understanding how galaxies form - and astro-particle physics - inferring properties of the dark components. The Square Kilometre Array (SKA) will provide the only means of studying the cosmic evolution of neutral Hydrogen (HI) which, alongside information on star formation from the radio continuum, is needed to understand how stars formed from gas within dark-matter over-densities and the roles of gas accretion and galaxy merging. `All "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409479","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":"2026-05-18T04:33:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EYHVAFqmAuTKVJTGqYsoMWyTyPAwBW9VS2xMB/6l2CUI17HjzPbDGXmqos6MYOAfEl2/gEBD1KBPhd1kDM2EDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:28:44.766356Z"},"content_sha256":"22bdc4128088087c6ad290dcaeca0369d097d5bd6125b06003c537e4b853597e","schema_version":"1.0","event_id":"sha256:22bdc4128088087c6ad290dcaeca0369d097d5bd6125b06003c537e4b853597e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N7AG7IGE25N4ERHTWZJE5UJF3T/bundle.json","state_url":"https://pith.science/pith/N7AG7IGE25N4ERHTWZJE5UJF3T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N7AG7IGE25N4ERHTWZJE5UJF3T/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":"2026-05-30T11:28:44Z","links":{"resolver":"https://pith.science/pith/N7AG7IGE25N4ERHTWZJE5UJF3T","bundle":"https://pith.science/pith/N7AG7IGE25N4ERHTWZJE5UJF3T/bundle.json","state":"https://pith.science/pith/N7AG7IGE25N4ERHTWZJE5UJF3T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N7AG7IGE25N4ERHTWZJE5UJF3T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:N7AG7IGE25N4ERHTWZJE5UJF3T","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":"6a8f0dd988974927f478bd12ffba3d4f0bb2dc74491d0281395b3ec97099694c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-20T16:23:38Z","title_canon_sha256":"6739f1c5b807333fbe970fe562a26c93d988b6590e9d96fb8e82b11a7a7ee3a4"},"schema_version":"1.0","source":{"id":"astro-ph/0409479","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409479","created_at":"2026-05-18T04:33:50Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409479v1","created_at":"2026-05-18T04:33:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409479","created_at":"2026-05-18T04:33:50Z"},{"alias_kind":"pith_short_12","alias_value":"N7AG7IGE25N4","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"N7AG7IGE25N4ERHT","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"N7AG7IGE","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:22bdc4128088087c6ad290dcaeca0369d097d5bd6125b06003c537e4b853597e","target":"graph","created_at":"2026-05-18T04:33:50Z","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 present-day Universe is seemingly dominated by dark energy and dark matter, but mapping the normal (baryonic) content remains vital for both astrophysics - understanding how galaxies form - and astro-particle physics - inferring properties of the dark components. The Square Kilometre Array (SKA) will provide the only means of studying the cosmic evolution of neutral Hydrogen (HI) which, alongside information on star formation from the radio continuum, is needed to understand how stars formed from gas within dark-matter over-densities and the roles of gas accretion and galaxy merging. `All ","authors_text":"C.A. Blake, C.M. Baugh, F.B. Abdalla, J.M. van der Hulst, L.J. Greenhill, S.L. Bridle, S. Rawlings","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-09-20T16:23:38Z","title":"Galaxy Evolution and Cosmology with the Square Kilometre Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409479","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":"sha256:7c10e52fc886000e6ec014e0cfa840b86b19e53e14e0a1121025b63c18af7620","target":"record","created_at":"2026-05-18T04:33:50Z","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":"6a8f0dd988974927f478bd12ffba3d4f0bb2dc74491d0281395b3ec97099694c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-20T16:23:38Z","title_canon_sha256":"6739f1c5b807333fbe970fe562a26c93d988b6590e9d96fb8e82b11a7a7ee3a4"},"schema_version":"1.0","source":{"id":"astro-ph/0409479","kind":"arxiv","version":1}},"canonical_sha256":"6fc06fa0c4d75bc244f3b6524ed125dcda4dc37db6e987be6c89df6a5a6ce304","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6fc06fa0c4d75bc244f3b6524ed125dcda4dc37db6e987be6c89df6a5a6ce304","first_computed_at":"2026-05-18T04:33:50.953847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:33:50.953847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1tSJhq+LNeCXTWmWYFhoV1DzjHvdq1WqWBhPJ9BgbZidMnCm9Yt1xXSH742P+NjWMVbyrEjVuViSbTd2+MffBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:33:50.954399Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0409479","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c10e52fc886000e6ec014e0cfa840b86b19e53e14e0a1121025b63c18af7620","sha256:22bdc4128088087c6ad290dcaeca0369d097d5bd6125b06003c537e4b853597e"],"state_sha256":"59954280e97ef35254c41087279d49e5f74a575f139cde2272c0f0e53b0525d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r/QGVviqiHgN/gVSgq8rO8sz1BhfAF0hLPrqe0dYkbTNr9PjUn+AQln5KKjIwJMn/lvQY9cJ+QTwBpoN2UbWAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T11:28:44.771124Z","bundle_sha256":"2b9686772e7c6128c71d5efdf2f6ec371c620e1a8c8a799a3594bb3b2eea6f26"}}