{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2006:ROBXGMGZ7NWSHQCNLORTSD5YQX","short_pith_number":"pith:ROBXGMGZ","schema_version":"1.0","canonical_sha256":"8b837330d9fb6d23c04d5ba3390fb885fe9407e1c0f0df14fa0f57f5347eb7d0","source":{"kind":"arxiv","id":"astro-ph/0607234","version":2},"attestation_state":"computed","paper":{"title":"21 cm fluctuations from inhomogeneous X-ray heating before reionization","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jonathan R. Pritchard (Caltech), Steven R. Furlanetto (Yale)","submitted_at":"2006-07-11T21:22:46Z","abstract_excerpt":"Many models of early structure formation predict a period of heating immediately preceding reionization, when X-rays raise the gas temperature above that of the cosmic microwave background. These X-rays are often assumed to heat the intergalactic medium (IGM) uniformly, but in reality they will heat the gas more strongly closer to the sources. We develop a framework for calculating fluctuations in the 21 cm brightness temperature that originate from this spatial variation in the heating rate. High-redshift sources are highly clustered, leading to significant gas temperature fluctuations (with "},"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/0607234","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-07-11T21:22:46Z","cross_cats_sorted":[],"title_canon_sha256":"34d06875a23d45d1c302d61d3e87546664bb167ea679f0045df6c1981620ede6","abstract_canon_sha256":"2f38bd54fd4a551e198243e19260d397cc10826cf3e0bb5b2354f83600533353"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:16:49.627157Z","signature_b64":"L19Adt46OqCLvlT766L2MOpcMtuaMvWWEnGRM61I8RGWRCKMRcggOtV2DuGxMfNxGRaWl62B3kJBdRB/u62bBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b837330d9fb6d23c04d5ba3390fb885fe9407e1c0f0df14fa0f57f5347eb7d0","last_reissued_at":"2026-07-04T15:16:49.626769Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:16:49.626769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"21 cm fluctuations from inhomogeneous X-ray heating before reionization","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jonathan R. Pritchard (Caltech), Steven R. Furlanetto (Yale)","submitted_at":"2006-07-11T21:22:46Z","abstract_excerpt":"Many models of early structure formation predict a period of heating immediately preceding reionization, when X-rays raise the gas temperature above that of the cosmic microwave background. These X-rays are often assumed to heat the intergalactic medium (IGM) uniformly, but in reality they will heat the gas more strongly closer to the sources. We develop a framework for calculating fluctuations in the 21 cm brightness temperature that originate from this spatial variation in the heating rate. High-redshift sources are highly clustered, leading to significant gas temperature fluctuations (with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0607234","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0607234/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/0607234","created_at":"2026-07-04T15:16:49.626821+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0607234v2","created_at":"2026-07-04T15:16:49.626821+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0607234","created_at":"2026-07-04T15:16:49.626821+00:00"},{"alias_kind":"pith_short_12","alias_value":"ROBXGMGZ7NWS","created_at":"2026-07-04T15:16:49.626821+00:00"},{"alias_kind":"pith_short_16","alias_value":"ROBXGMGZ7NWSHQCN","created_at":"2026-07-04T15:16:49.626821+00:00"},{"alias_kind":"pith_short_8","alias_value":"ROBXGMGZ","created_at":"2026-07-04T15:16:49.626821+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2504.17064","citing_title":"Imprints of energy injection by compact dark stars in the 21-cm signal","ref_index":51,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX","json":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX.json","graph_json":"https://pith.science/api/pith-number/ROBXGMGZ7NWSHQCNLORTSD5YQX/graph.json","events_json":"https://pith.science/api/pith-number/ROBXGMGZ7NWSHQCNLORTSD5YQX/events.json","paper":"https://pith.science/paper/ROBXGMGZ"},"agent_actions":{"view_html":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX","download_json":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX.json","view_paper":"https://pith.science/paper/ROBXGMGZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0607234&json=true","fetch_graph":"https://pith.science/api/pith-number/ROBXGMGZ7NWSHQCNLORTSD5YQX/graph.json","fetch_events":"https://pith.science/api/pith-number/ROBXGMGZ7NWSHQCNLORTSD5YQX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX/action/storage_attestation","attest_author":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX/action/author_attestation","sign_citation":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX/action/citation_signature","submit_replication":"https://pith.science/pith/ROBXGMGZ7NWSHQCNLORTSD5YQX/action/replication_record"}},"created_at":"2026-07-04T15:16:49.626821+00:00","updated_at":"2026-07-04T15:16:49.626821+00:00"}