{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:6JZAYU47HKNPOWX4WWUW6GP3WN","short_pith_number":"pith:6JZAYU47","canonical_record":{"source":{"id":"2012.09851","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-17T18:59:06Z","cross_cats_sorted":[],"title_canon_sha256":"a079488df67d660374c8e3fea53b6c0bd12aa1cd8e076d37f06a6739a71df9c2","abstract_canon_sha256":"5444b69dae34b3777de839fdfbb30b03343266457cf052ff0f1114fef985c6cd"},"schema_version":"1.0"},"canonical_sha256":"f2720c539f3a9af75afcb5a96f19fbb37f1a2817d89b6705e66a1c75777be110","source":{"kind":"arxiv","id":"2012.09851","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.09851","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"arxiv_version","alias_value":"2012.09851v1","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.09851","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"pith_short_12","alias_value":"6JZAYU47HKNP","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"pith_short_16","alias_value":"6JZAYU47HKNPOWX4","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"pith_short_8","alias_value":"6JZAYU47","created_at":"2026-07-05T04:06:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:6JZAYU47HKNPOWX4WWUW6GP3WN","target":"record","payload":{"canonical_record":{"source":{"id":"2012.09851","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-17T18:59:06Z","cross_cats_sorted":[],"title_canon_sha256":"a079488df67d660374c8e3fea53b6c0bd12aa1cd8e076d37f06a6739a71df9c2","abstract_canon_sha256":"5444b69dae34b3777de839fdfbb30b03343266457cf052ff0f1114fef985c6cd"},"schema_version":"1.0"},"canonical_sha256":"f2720c539f3a9af75afcb5a96f19fbb37f1a2817d89b6705e66a1c75777be110","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:06:13.846191Z","signature_b64":"xsSuI/xTEQsSjq/ItYFgL+J6igOSN3hhKUngc18yZnQbN9izNpgoOZxYhJSvzz2UCKAdvRgMqVwjALZsbow2Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2720c539f3a9af75afcb5a96f19fbb37f1a2817d89b6705e66a1c75777be110","last_reissued_at":"2026-07-05T04:06:13.845704Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:06:13.845704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.09851","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:06:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yyx+GjYEQoojQtWPcPkFdvK9OMPRZQcepIUQ4DE9CEbH3TPuR9sXu/sO/HVocevtO9ktwUwZuRLUhrK8qXDaCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T04:00:12.580492Z"},"content_sha256":"8612e55de42f5c2d27f80d3910a85c7ca82f1d1b6c99bf3263a1447014060235","schema_version":"1.0","event_id":"sha256:8612e55de42f5c2d27f80d3910a85c7ca82f1d1b6c99bf3263a1447014060235"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:6JZAYU47HKNPOWX4WWUW6GP3WN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reconstructing large scales at cosmic dawn","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Matthew C. Johnson, Selim C. Hotinli","submitted_at":"2020-12-17T18:59:06Z","abstract_excerpt":"The cosmic microwave background (CMB) serves as a backlight to large-scale structure during the epoch of reionization, where Thomson scattering gives rise to temperature anisotropies on small angular scales from the kinetic Sunyaev Zel'dovich (kSZ) effect. In this paper, we demonstrate that the technique of kSZ tomography (velocity reconstruction), based on cross correlations between CMB temperature and 21cm surveys, can significantly improve constraints on models of inhomogeneous reionization and provide information about large-scale modes that are poorly characterized by 21cm measurements th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.09851","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/2012.09851/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":"2026-07-05T04:06:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4oc5U5JSVkEdpwFgQrZScA64IgCjqP46iQTpvkKBU5uRqnhYmgOYikVsUWH2uP0vLKu3ZOvSoO9NO8lLelKcAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T04:00:12.581015Z"},"content_sha256":"4502b6c8e9529343a943def5fb40bea3b6fde8b1ac7af3d0d3b980df2157dd94","schema_version":"1.0","event_id":"sha256:4502b6c8e9529343a943def5fb40bea3b6fde8b1ac7af3d0d3b980df2157dd94"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6JZAYU47HKNPOWX4WWUW6GP3WN/bundle.json","state_url":"https://pith.science/pith/6JZAYU47HKNPOWX4WWUW6GP3WN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6JZAYU47HKNPOWX4WWUW6GP3WN/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":"2026-08-19T04:00:12Z","links":{"resolver":"https://pith.science/pith/6JZAYU47HKNPOWX4WWUW6GP3WN","bundle":"https://pith.science/pith/6JZAYU47HKNPOWX4WWUW6GP3WN/bundle.json","state":"https://pith.science/pith/6JZAYU47HKNPOWX4WWUW6GP3WN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6JZAYU47HKNPOWX4WWUW6GP3WN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6JZAYU47HKNPOWX4WWUW6GP3WN","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":"5444b69dae34b3777de839fdfbb30b03343266457cf052ff0f1114fef985c6cd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-17T18:59:06Z","title_canon_sha256":"a079488df67d660374c8e3fea53b6c0bd12aa1cd8e076d37f06a6739a71df9c2"},"schema_version":"1.0","source":{"id":"2012.09851","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.09851","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"arxiv_version","alias_value":"2012.09851v1","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.09851","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"pith_short_12","alias_value":"6JZAYU47HKNP","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"pith_short_16","alias_value":"6JZAYU47HKNPOWX4","created_at":"2026-07-05T04:06:13Z"},{"alias_kind":"pith_short_8","alias_value":"6JZAYU47","created_at":"2026-07-05T04:06:13Z"}],"graph_snapshots":[{"event_id":"sha256:4502b6c8e9529343a943def5fb40bea3b6fde8b1ac7af3d0d3b980df2157dd94","target":"graph","created_at":"2026-07-05T04:06:13Z","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/2012.09851/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The cosmic microwave background (CMB) serves as a backlight to large-scale structure during the epoch of reionization, where Thomson scattering gives rise to temperature anisotropies on small angular scales from the kinetic Sunyaev Zel'dovich (kSZ) effect. In this paper, we demonstrate that the technique of kSZ tomography (velocity reconstruction), based on cross correlations between CMB temperature and 21cm surveys, can significantly improve constraints on models of inhomogeneous reionization and provide information about large-scale modes that are poorly characterized by 21cm measurements th","authors_text":"Matthew C. Johnson, Selim C. Hotinli","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-17T18:59:06Z","title":"Reconstructing large scales at cosmic dawn"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.09851","kind":"arxiv","version":1},"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":"sha256:8612e55de42f5c2d27f80d3910a85c7ca82f1d1b6c99bf3263a1447014060235","target":"record","created_at":"2026-07-05T04:06:13Z","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":"5444b69dae34b3777de839fdfbb30b03343266457cf052ff0f1114fef985c6cd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-17T18:59:06Z","title_canon_sha256":"a079488df67d660374c8e3fea53b6c0bd12aa1cd8e076d37f06a6739a71df9c2"},"schema_version":"1.0","source":{"id":"2012.09851","kind":"arxiv","version":1}},"canonical_sha256":"f2720c539f3a9af75afcb5a96f19fbb37f1a2817d89b6705e66a1c75777be110","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2720c539f3a9af75afcb5a96f19fbb37f1a2817d89b6705e66a1c75777be110","first_computed_at":"2026-07-05T04:06:13.845704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:06:13.845704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xsSuI/xTEQsSjq/ItYFgL+J6igOSN3hhKUngc18yZnQbN9izNpgoOZxYhJSvzz2UCKAdvRgMqVwjALZsbow2Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:06:13.846191Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.09851","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8612e55de42f5c2d27f80d3910a85c7ca82f1d1b6c99bf3263a1447014060235","sha256:4502b6c8e9529343a943def5fb40bea3b6fde8b1ac7af3d0d3b980df2157dd94"],"state_sha256":"d8a0cd4b93adb6195cad349d8895ca98f4ef7531f3d8c0462e31f82c7acbbb22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aC1Ve/uqJMEQ+gBJsnVwbeFteDMpZt0un0FcvCrace/TcGfAgmPl3G2COC4RZ4/C4kYTdANpBBRIHCNE4v0fAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T04:00:12.585589Z","bundle_sha256":"3e82fb3cbf3c92ec8ad99fcbf7750c0867bf3ae32ee95ded782a93e8e7cdb3fd"}}