{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:BY2CX7IE75EUMDDGQJNBQCBXP3","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":"eff2c8ee871553028536d60f0b8b03169dc34520f94aee8566501f7d226643d8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-03-14T18:26:07Z","title_canon_sha256":"afbb2a8141b20cf6be90c126cb96c2870230da4089f7d648b370ce9d52b2d12f"},"schema_version":"1.0","source":{"id":"astro-ph/0003200","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0003200","created_at":"2026-07-04T16:16:10Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0003200v2","created_at":"2026-07-04T16:16:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0003200","created_at":"2026-07-04T16:16:10Z"},{"alias_kind":"pith_short_12","alias_value":"BY2CX7IE75EU","created_at":"2026-07-04T16:16:10Z"},{"alias_kind":"pith_short_16","alias_value":"BY2CX7IE75EUMDDG","created_at":"2026-07-04T16:16:10Z"},{"alias_kind":"pith_short_8","alias_value":"BY2CX7IE","created_at":"2026-07-04T16:16:10Z"}],"graph_snapshots":[{"event_id":"sha256:4ac2b55c68f0f1b51f47571c8531476457fef2b50ba88053f26fb747ef50f8dd","target":"graph","created_at":"2026-07-04T16:16:10Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0003200/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The redshifted 1420 MHz emission from the HI in unresolved damped Lyman-\\alpha clouds at high z will appear as a background radiation in low frequency radio observations. This holds the possibility of a new tool for studying the universe at high-z, using the mean brightness temperature to probe the HI content and its fluctuations to probe the power spectrum. Existing estimates of the HI density at z~3 imply a mean brightness temperature of 1 mK at 320 Mhz. The cross-correlation between the temperature fluctuations across different frequencies and sight lines is predicted to vary from 10^{-7} K","authors_text":"Allahabad, Bangalore, Biman B. Nath (2), CTS, IIT Kharagpur, India), India; (2) RRI, India (3) MRI, Shiv K. Sethi (3) ((1). Department of Physics, Somnath Bharadwaj (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-03-14T18:26:07Z","title":"Using HI to probe large scale structures at z ~ 3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0003200","kind":"arxiv","version":2},"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":"sha256:24393536d34402746047ff643bc3882e4cbacd5466b05f66e49e493de36c58ed","target":"record","created_at":"2026-07-04T16:16:10Z","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":"eff2c8ee871553028536d60f0b8b03169dc34520f94aee8566501f7d226643d8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-03-14T18:26:07Z","title_canon_sha256":"afbb2a8141b20cf6be90c126cb96c2870230da4089f7d648b370ce9d52b2d12f"},"schema_version":"1.0","source":{"id":"astro-ph/0003200","kind":"arxiv","version":2}},"canonical_sha256":"0e342bfd04ff49460c66825a1808377eccb88729cc2ca50350ccf04e7ee0a88e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e342bfd04ff49460c66825a1808377eccb88729cc2ca50350ccf04e7ee0a88e","first_computed_at":"2026-07-04T16:16:10.850411Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:16:10.850411Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SI1llq5JOBRDPnpT5DBfbp9XsTW6KEXGIZGyGAyFH8UujCnUV8n4ScSrZFqKcJ+rd6Fd9leY/6SdvcBZR+wcBg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:16:10.850836Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0003200","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24393536d34402746047ff643bc3882e4cbacd5466b05f66e49e493de36c58ed","sha256:4ac2b55c68f0f1b51f47571c8531476457fef2b50ba88053f26fb747ef50f8dd"],"state_sha256":"fa7ddb66818a472d00914ce79c6d4379a09eeeb5b9be97d06bcfd2a918f239f6"}