{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1999:K5GKGCERI7D7IKLZWNQNEPZQJX","short_pith_number":"pith:K5GKGCER","schema_version":"1.0","canonical_sha256":"574ca3089147c7f42979b360d23f304dee6f5d3b9a36e43d1c356051672aba8e","source":{"kind":"arxiv","id":"astro-ph/9912345","version":1},"attestation_state":"computed","paper":{"title":"`First Light' in the Universe; What Ended the \"Dark Age\"?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Martin J. Rees (Institute of Astronomy, University of Cambridge)","submitted_at":"1999-12-16T12:47:18Z","abstract_excerpt":"The universe would have been completely dark between the epoch of recombination and the development of the first non-linear structure. But at redshifts beyond 5 -- perhaps even beyond 20 -- stars formed within `subgalaxies' and created the first heavy elements; these same systems (together perhaps with `miniquasars') generated the UV radiation that ionized the IGM, and maybe also the first significant magnetic fields. Although we can already probe back to $z \\simeq 5$, these very first objects may be so faint that their detection must await next-generation optical and infrared telescopes. Obse"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/9912345","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-12-16T12:47:18Z","cross_cats_sorted":[],"title_canon_sha256":"75e1c92bf444eb164779b66a7c376cd2bce54416d41583d1425f9299f10d5595","abstract_canon_sha256":"de4d78bd78bda8888b01028fac3ec62e6a592f5b8b3e663a587c08f7d3a6e7fe"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:12:01.670222Z","signature_b64":"htwbL7AUZXWk35zIjmvfTsrmLBTjHv1v/XXFIvkcQzuxQrPumH3y3Oom+AIjR5Esd6Ikhjmk1SYkmOw0R/7NAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"574ca3089147c7f42979b360d23f304dee6f5d3b9a36e43d1c356051672aba8e","last_reissued_at":"2026-07-04T16:12:01.669821Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:12:01.669821Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"`First Light' in the Universe; What Ended the \"Dark Age\"?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Martin J. Rees (Institute of Astronomy, University of Cambridge)","submitted_at":"1999-12-16T12:47:18Z","abstract_excerpt":"The universe would have been completely dark between the epoch of recombination and the development of the first non-linear structure. But at redshifts beyond 5 -- perhaps even beyond 20 -- stars formed within `subgalaxies' and created the first heavy elements; these same systems (together perhaps with `miniquasars') generated the UV radiation that ionized the IGM, and maybe also the first significant magnetic fields. Although we can already probe back to $z \\simeq 5$, these very first objects may be so faint that their detection must await next-generation optical and infrared telescopes. Obse"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9912345","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9912345/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9912345","created_at":"2026-07-04T16:12:01.669883+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9912345v1","created_at":"2026-07-04T16:12:01.669883+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9912345","created_at":"2026-07-04T16:12:01.669883+00:00"},{"alias_kind":"pith_short_12","alias_value":"K5GKGCERI7D7","created_at":"2026-07-04T16:12:01.669883+00:00"},{"alias_kind":"pith_short_16","alias_value":"K5GKGCERI7D7IKLZ","created_at":"2026-07-04T16:12:01.669883+00:00"},{"alias_kind":"pith_short_8","alias_value":"K5GKGCER","created_at":"2026-07-04T16:12:01.669883+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2507.05654","citing_title":"PRATUSH experiment concept and design overview","ref_index":2,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX","json":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX.json","graph_json":"https://pith.science/api/pith-number/K5GKGCERI7D7IKLZWNQNEPZQJX/graph.json","events_json":"https://pith.science/api/pith-number/K5GKGCERI7D7IKLZWNQNEPZQJX/events.json","paper":"https://pith.science/paper/K5GKGCER"},"agent_actions":{"view_html":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX","download_json":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX.json","view_paper":"https://pith.science/paper/K5GKGCER","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9912345&json=true","fetch_graph":"https://pith.science/api/pith-number/K5GKGCERI7D7IKLZWNQNEPZQJX/graph.json","fetch_events":"https://pith.science/api/pith-number/K5GKGCERI7D7IKLZWNQNEPZQJX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX/action/storage_attestation","attest_author":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX/action/author_attestation","sign_citation":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX/action/citation_signature","submit_replication":"https://pith.science/pith/K5GKGCERI7D7IKLZWNQNEPZQJX/action/replication_record"}},"created_at":"2026-07-04T16:12:01.669883+00:00","updated_at":"2026-07-04T16:12:01.669883+00:00"}