{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NEZVMEYOD35CGF656GDU2OZ7CE","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":"0c89f97e6724a6f502fb8ad9bdd4d0f1bc3d008457b6e082dce8573debe165b1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-10-15T11:10:30Z","title_canon_sha256":"b37877c8cf3784b2ca7b35e527f3a53d049308664fe1d2fd84444eda2c24ad28"},"schema_version":"1.0","source":{"id":"1810.06273","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.06273","created_at":"2026-05-17T23:57:31Z"},{"alias_kind":"arxiv_version","alias_value":"1810.06273v3","created_at":"2026-05-17T23:57:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.06273","created_at":"2026-05-17T23:57:31Z"},{"alias_kind":"pith_short_12","alias_value":"NEZVMEYOD35C","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NEZVMEYOD35CGF65","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NEZVMEYO","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:1f2d90bed02a4abd6e65e91e26640a438e48da7ba07307a4915d963bca7a76ad","target":"graph","created_at":"2026-05-17T23:57:31Z","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 light-cone (LC) effect imprints the cosmological evolution of the redshifted 21-cm signal $T_{\\rm b} ({\\hat{\\bf{n}}}, \\nu)$ along the frequency axis which is the line of sight (LoS) direction of an observer. The effect is particularly pronounced during the Epoch of Reionization (EoR) when the mean hydrogen neutral fraction ${\\bar{x}_{\\rm HI}}(\\nu)$ falls rapidly as the universe evolves. The multi-frequency angular power spectrum (MAPS) ${{\\mathcal C}_{\\ell}}(\\nu_1,\\nu_2)$ quantifies the entire second-order statistics of $T_{\\rm b} ({\\hat{\\bf{n}}}, \\nu)$ considering both the systematic vari","authors_text":"Abinash K. Shaw (IITKgp), Anjan K. Sarkar (IITKgp), Ilian T. Iliev (Sussex), Kanan K. Datta (Presidency U), Rajesh Mondal (Sussex), Somnath Bharadwaj (IITKgp), Suman Majumdar (IITI)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-10-15T11:10:30Z","title":"A method to determine the evolution history of the mean neutral Hydrogen fraction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.06273","kind":"arxiv","version":3},"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":"sha256:522943fe972a1af5761f904d6c971fbf1b563a40f74046be55bd9def53c5d489","target":"record","created_at":"2026-05-17T23:57:31Z","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":"0c89f97e6724a6f502fb8ad9bdd4d0f1bc3d008457b6e082dce8573debe165b1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-10-15T11:10:30Z","title_canon_sha256":"b37877c8cf3784b2ca7b35e527f3a53d049308664fe1d2fd84444eda2c24ad28"},"schema_version":"1.0","source":{"id":"1810.06273","kind":"arxiv","version":3}},"canonical_sha256":"693356130e1efa2317ddf1874d3b3f1128b69b7e793f8dc4128847d4237a6bc8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"693356130e1efa2317ddf1874d3b3f1128b69b7e793f8dc4128847d4237a6bc8","first_computed_at":"2026-05-17T23:57:31.080606Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:31.080606Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5d/AcDE7dKVsaDa4cRQtnc1xLet5gdQG3pysxRNhCtHlx5/hd9tyvTh5slyq0e6NAoYkYOL3uV+qoxfOnQMJDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:31.081198Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.06273","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:522943fe972a1af5761f904d6c971fbf1b563a40f74046be55bd9def53c5d489","sha256:1f2d90bed02a4abd6e65e91e26640a438e48da7ba07307a4915d963bca7a76ad"],"state_sha256":"dcd12549444e3796e28997bde8974ad5bce00944e171320a62e3293d49d84912"}