{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7SMHIIITFNLEV3HLMGZ7UIQRLH","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":"dfb2b49df082f11626b046eb5dbf45d21ef93c5d53d2f4487987ad9dc7be4724","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-04-04T16:10:37Z","title_canon_sha256":"50284e3db2853b6fd942d295d1522a42160603db83ce9605b67ab85a4cb70803"},"schema_version":"1.0","source":{"id":"1904.02637","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.02637","created_at":"2026-07-05T00:52:45Z"},{"alias_kind":"arxiv_version","alias_value":"1904.02637v2","created_at":"2026-07-05T00:52:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.02637","created_at":"2026-07-05T00:52:45Z"},{"alias_kind":"pith_short_12","alias_value":"7SMHIIITFNLE","created_at":"2026-07-05T00:52:45Z"},{"alias_kind":"pith_short_16","alias_value":"7SMHIIITFNLEV3HL","created_at":"2026-07-05T00:52:45Z"},{"alias_kind":"pith_short_8","alias_value":"7SMHIIIT","created_at":"2026-07-05T00:52:45Z"}],"graph_snapshots":[{"event_id":"sha256:e7b18020008ecaddb548a73f7da9dab2a7accbb71a982e03346c05327b8cfdfd","target":"graph","created_at":"2026-07-05T00:52:45Z","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/1904.02637/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The cross-correlation between fluctuations in the electron scattering optical depth $\\tau_{\\rm es}$ as probed by future Cosmic Microwave Background (CMB) experiments, and fluctuations in the 21cm differential brightness temperature $\\Delta T_{\\rm 21cm}$ as probed by ground-based radio interferometers, will trace the reionization history of the Universe. In particular, the $\\tau_{\\rm es}-$21cm cross-correlation should yield a determination of the characteristic bubble size distribution and ionization fraction as a function of redshift. When assuming that the cross-correlation signal is limited ","authors_text":"Andrea Lapi, Anirban Roy, Carlo Baccigalupi, David Spergel, Soumen Basak","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-04-04T16:10:37Z","title":"Detectability of the $\\tau_{es}$-21cm cross-correlation: a tomographic probe of patchy reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02637","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:cd18d5282d1325c5f675ea6256896262fe58bf2141c6a0d9de48a89bfd23da45","target":"record","created_at":"2026-07-05T00:52:45Z","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":"dfb2b49df082f11626b046eb5dbf45d21ef93c5d53d2f4487987ad9dc7be4724","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-04-04T16:10:37Z","title_canon_sha256":"50284e3db2853b6fd942d295d1522a42160603db83ce9605b67ab85a4cb70803"},"schema_version":"1.0","source":{"id":"1904.02637","kind":"arxiv","version":2}},"canonical_sha256":"fc987421132b564aeceb61b3fa221159fbb3fd8df7ec6156106d663feba3bff3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc987421132b564aeceb61b3fa221159fbb3fd8df7ec6156106d663feba3bff3","first_computed_at":"2026-07-05T00:52:45.648709Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:52:45.648709Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rbh/CjR9/Eo97i/WjCArp5NLQgFKIH83DLUBdgkd9o6k3Gxsy2+4fgooMUXXhLCqicHpzkKQOzOThH8vzvvNAw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:52:45.649180Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.02637","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd18d5282d1325c5f675ea6256896262fe58bf2141c6a0d9de48a89bfd23da45","sha256:e7b18020008ecaddb548a73f7da9dab2a7accbb71a982e03346c05327b8cfdfd"],"state_sha256":"92b8d929b24d4e793532b8346125a8682d860a630478d6f8e048f257221cf79d"}