{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:YPAVJPKDJGX7YTBCHLT3SGQM7M","short_pith_number":"pith:YPAVJPKD","canonical_record":{"source":{"id":"2107.10693","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-22T14:00:51Z","cross_cats_sorted":[],"title_canon_sha256":"7f10dda15281c28846b1f293396772d4e0a36839e456ab2b19b75485b9982088","abstract_canon_sha256":"591086714638284976dfb4059d35c5c9a45b2fa62be1f8ad7677138b72d05a86"},"schema_version":"1.0"},"canonical_sha256":"c3c154bd4349affc4c223ae7b91a0cfb3f90681a76804e23e134e136802db9c4","source":{"kind":"arxiv","id":"2107.10693","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.10693","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"arxiv_version","alias_value":"2107.10693v2","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.10693","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"pith_short_12","alias_value":"YPAVJPKDJGX7","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"pith_short_16","alias_value":"YPAVJPKDJGX7YTBC","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"pith_short_8","alias_value":"YPAVJPKD","created_at":"2026-07-05T03:47:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:YPAVJPKDJGX7YTBCHLT3SGQM7M","target":"record","payload":{"canonical_record":{"source":{"id":"2107.10693","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-22T14:00:51Z","cross_cats_sorted":[],"title_canon_sha256":"7f10dda15281c28846b1f293396772d4e0a36839e456ab2b19b75485b9982088","abstract_canon_sha256":"591086714638284976dfb4059d35c5c9a45b2fa62be1f8ad7677138b72d05a86"},"schema_version":"1.0"},"canonical_sha256":"c3c154bd4349affc4c223ae7b91a0cfb3f90681a76804e23e134e136802db9c4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:47:53.502113Z","signature_b64":"1b7/Vx0GEoHDyksNpNgtI5D35es/jqScvL5Yzln4kltZYS3f52Ks+xhP1KoiQ74mClPXP40roz6KVhrwNs+0Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c3c154bd4349affc4c223ae7b91a0cfb3f90681a76804e23e134e136802db9c4","last_reissued_at":"2026-07-05T03:47:53.501684Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:47:53.501684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.10693","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:47:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GZTnDhIlKaK8oUDEt9AmQ2omsIrkXhvhDM5pPWhqE2Y9wCwf0dLd87VqnVDmXvDGYqWiItthGG8Le72rcefiCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T20:58:35.697306Z"},"content_sha256":"43a6353d8f70bea72e018fd87d3942ac61997fffce29eebbc389015f90e94557","schema_version":"1.0","event_id":"sha256:43a6353d8f70bea72e018fd87d3942ac61997fffce29eebbc389015f90e94557"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:YPAVJPKDJGX7YTBCHLT3SGQM7M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dark Twilight Joined with the Light of Dawn to Unveil the Reionization History","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Daniela Paoletti, Dhiraj Kumar Hazra, Fabio Finelli, George F. Smoot","submitted_at":"2021-07-22T14:00:51Z","abstract_excerpt":"Improved measurement of the Cosmic Microwave Background polarization from Planck allows a detailed study of reionization beyond the average optical depth. The lower value of the optical depth disfavours an early onset and an early completion of reionization in favour of a redsfhit range where different astrophysical probes provide sensible information on the sources of reionization and the status of the intergalactic medium. In this work we extend our previous study in which we constrained reionization by combining three different probes - CMB, UV luminosity density and neutral hydrogen fracti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.10693","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/2107.10693/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:47:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X0DeGhhdH7k0JFAsdlsYKzl3JfQSx/S92PvLDScCH8mojJY3vYpN32YGE2+Jm98Kz1o/fMnpP734+9zeNVJXBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T20:58:35.698171Z"},"content_sha256":"1dc16a209063f0989a869a7dce93ac900337c1f248f88828b5e698ee5bbff69c","schema_version":"1.0","event_id":"sha256:1dc16a209063f0989a869a7dce93ac900337c1f248f88828b5e698ee5bbff69c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M/bundle.json","state_url":"https://pith.science/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M/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":"2026-08-18T20:58:35Z","links":{"resolver":"https://pith.science/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M","bundle":"https://pith.science/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M/bundle.json","state":"https://pith.science/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YPAVJPKDJGX7YTBCHLT3SGQM7M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:YPAVJPKDJGX7YTBCHLT3SGQM7M","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":"591086714638284976dfb4059d35c5c9a45b2fa62be1f8ad7677138b72d05a86","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-22T14:00:51Z","title_canon_sha256":"7f10dda15281c28846b1f293396772d4e0a36839e456ab2b19b75485b9982088"},"schema_version":"1.0","source":{"id":"2107.10693","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.10693","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"arxiv_version","alias_value":"2107.10693v2","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.10693","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"pith_short_12","alias_value":"YPAVJPKDJGX7","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"pith_short_16","alias_value":"YPAVJPKDJGX7YTBC","created_at":"2026-07-05T03:47:53Z"},{"alias_kind":"pith_short_8","alias_value":"YPAVJPKD","created_at":"2026-07-05T03:47:53Z"}],"graph_snapshots":[{"event_id":"sha256:1dc16a209063f0989a869a7dce93ac900337c1f248f88828b5e698ee5bbff69c","target":"graph","created_at":"2026-07-05T03:47:53Z","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/2107.10693/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Improved measurement of the Cosmic Microwave Background polarization from Planck allows a detailed study of reionization beyond the average optical depth. The lower value of the optical depth disfavours an early onset and an early completion of reionization in favour of a redsfhit range where different astrophysical probes provide sensible information on the sources of reionization and the status of the intergalactic medium. In this work we extend our previous study in which we constrained reionization by combining three different probes - CMB, UV luminosity density and neutral hydrogen fracti","authors_text":"Daniela Paoletti, Dhiraj Kumar Hazra, Fabio Finelli, George F. Smoot","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-22T14:00:51Z","title":"Dark Twilight Joined with the Light of Dawn to Unveil the Reionization History"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.10693","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":"sha256:43a6353d8f70bea72e018fd87d3942ac61997fffce29eebbc389015f90e94557","target":"record","created_at":"2026-07-05T03:47:53Z","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":"591086714638284976dfb4059d35c5c9a45b2fa62be1f8ad7677138b72d05a86","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-22T14:00:51Z","title_canon_sha256":"7f10dda15281c28846b1f293396772d4e0a36839e456ab2b19b75485b9982088"},"schema_version":"1.0","source":{"id":"2107.10693","kind":"arxiv","version":2}},"canonical_sha256":"c3c154bd4349affc4c223ae7b91a0cfb3f90681a76804e23e134e136802db9c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c3c154bd4349affc4c223ae7b91a0cfb3f90681a76804e23e134e136802db9c4","first_computed_at":"2026-07-05T03:47:53.501684Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:47:53.501684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1b7/Vx0GEoHDyksNpNgtI5D35es/jqScvL5Yzln4kltZYS3f52Ks+xhP1KoiQ74mClPXP40roz6KVhrwNs+0Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:47:53.502113Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.10693","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43a6353d8f70bea72e018fd87d3942ac61997fffce29eebbc389015f90e94557","sha256:1dc16a209063f0989a869a7dce93ac900337c1f248f88828b5e698ee5bbff69c"],"state_sha256":"7872a64a5703b8d695930f4f1dba2aaf910f56fad9ba42b1ccac63c7c6a41616"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KMU/GfY4VMp3lFlP2qySlkakPspbvHZQfMWJk+9dVk+gJGywkEwe/kFlsb3KNVnze8MOjWYxXBeEprQHMP6vAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T20:58:35.703078Z","bundle_sha256":"6379736efed80c76fdcaa51cc57a6f4738ec8486e8eabe0aca3c71b1682beae4"}}