{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:MYSC64CUGUMYNZ42ZHR2QBVW7M","short_pith_number":"pith:MYSC64CU","canonical_record":{"source":{"id":"1006.5460","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:12:34Z","cross_cats_sorted":[],"title_canon_sha256":"70153edddf8187226ca13957798104728df5079157e4925fa22b22f876727394","abstract_canon_sha256":"00d8ab9177db2a8e5815f577accd59a2153f02fb8696493a91e7c92777bbdd8b"},"schema_version":"1.0"},"canonical_sha256":"66242f7054351986e79ac9e3a806b6fb26283b7a3a7277d9648cbe89688c9860","source":{"kind":"arxiv","id":"1006.5460","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.5460","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"1006.5460v3","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.5460","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"MYSC64CUGUMY","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MYSC64CUGUMYNZ42","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MYSC64CU","created_at":"2026-05-18T12:26:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:MYSC64CUGUMYNZ42ZHR2QBVW7M","target":"record","payload":{"canonical_record":{"source":{"id":"1006.5460","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:12:34Z","cross_cats_sorted":[],"title_canon_sha256":"70153edddf8187226ca13957798104728df5079157e4925fa22b22f876727394","abstract_canon_sha256":"00d8ab9177db2a8e5815f577accd59a2153f02fb8696493a91e7c92777bbdd8b"},"schema_version":"1.0"},"canonical_sha256":"66242f7054351986e79ac9e3a806b6fb26283b7a3a7277d9648cbe89688c9860","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:50.706534Z","signature_b64":"jUjDhUj6wf3/h0qcBvTfS0+R9xlI5IbZ9ZEM6NON/zluOGMR+xMOR4wwdtVI6xfyGNr/2CX/jpu25YYZdRIPAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66242f7054351986e79ac9e3a806b6fb26283b7a3a7277d9648cbe89688c9860","last_reissued_at":"2026-05-18T04:21:50.706031Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:50.706031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.5460","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WklnVwWj++H233IWYTTADFd5Sw7wIx0jv7dsOWiITquIj3VLUvtCDTbAe0IYxPRAC8bay3D5a8E4W8WHqtkVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:48:58.733447Z"},"content_sha256":"7e0e2ab7b5889123367ce4b81d5458d1eb7d3772c9b01e6cb6d3bfee2fdc4467","schema_version":"1.0","event_id":"sha256:7e0e2ab7b5889123367ce4b81d5458d1eb7d3772c9b01e6cb6d3bfee2fdc4467"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:MYSC64CUGUMYNZ42ZHR2QBVW7M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring the Redshift of Reionization with a Modest Array of Low-Frequency Dipoles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Abraham Loeb (Harvard), Jonathan M. Bittner","submitted_at":"2010-06-28T20:12:34Z","abstract_excerpt":"The designs of the first generation of cosmological 21-cm observatories are split between single dipole experiments which integrate over a large patch of sky in order to find the global (spectral) signature of reionization, and interferometers with arcminute-scale angular resolution whose goal is to measure the 3D power spectrum of ionized regions during reionization. We examine whether intermediate scale instruments with complete Fourier (uv) coverage are capable of placing new constraints on reionization. We find that even without using a full power spectrum analysis, the global redshift of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.5460","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T04:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mlHAPmOJCzDmkLszpcRh4rEGFtvZ1XfMQ1k+CRxrs28G0L5LvmQGLBT/BXG0dTy2gjIIUL+DaE0BnsARth/BBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:48:58.733843Z"},"content_sha256":"24bae149fe14840363e5e2861cbf72e36e3791bfe8e11667f647f4684a091ee5","schema_version":"1.0","event_id":"sha256:24bae149fe14840363e5e2861cbf72e36e3791bfe8e11667f647f4684a091ee5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M/bundle.json","state_url":"https://pith.science/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M/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":"2026-06-02T20:48:58Z","links":{"resolver":"https://pith.science/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M","bundle":"https://pith.science/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M/bundle.json","state":"https://pith.science/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYSC64CUGUMYNZ42ZHR2QBVW7M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:MYSC64CUGUMYNZ42ZHR2QBVW7M","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":"00d8ab9177db2a8e5815f577accd59a2153f02fb8696493a91e7c92777bbdd8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:12:34Z","title_canon_sha256":"70153edddf8187226ca13957798104728df5079157e4925fa22b22f876727394"},"schema_version":"1.0","source":{"id":"1006.5460","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.5460","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"1006.5460v3","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.5460","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"MYSC64CUGUMY","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MYSC64CUGUMYNZ42","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MYSC64CU","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:24bae149fe14840363e5e2861cbf72e36e3791bfe8e11667f647f4684a091ee5","target":"graph","created_at":"2026-05-18T04:21:50Z","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 designs of the first generation of cosmological 21-cm observatories are split between single dipole experiments which integrate over a large patch of sky in order to find the global (spectral) signature of reionization, and interferometers with arcminute-scale angular resolution whose goal is to measure the 3D power spectrum of ionized regions during reionization. We examine whether intermediate scale instruments with complete Fourier (uv) coverage are capable of placing new constraints on reionization. We find that even without using a full power spectrum analysis, the global redshift of ","authors_text":"Abraham Loeb (Harvard), Jonathan M. Bittner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:12:34Z","title":"Measuring the Redshift of Reionization with a Modest Array of Low-Frequency Dipoles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.5460","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":"sha256:7e0e2ab7b5889123367ce4b81d5458d1eb7d3772c9b01e6cb6d3bfee2fdc4467","target":"record","created_at":"2026-05-18T04:21:50Z","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":"00d8ab9177db2a8e5815f577accd59a2153f02fb8696493a91e7c92777bbdd8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:12:34Z","title_canon_sha256":"70153edddf8187226ca13957798104728df5079157e4925fa22b22f876727394"},"schema_version":"1.0","source":{"id":"1006.5460","kind":"arxiv","version":3}},"canonical_sha256":"66242f7054351986e79ac9e3a806b6fb26283b7a3a7277d9648cbe89688c9860","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66242f7054351986e79ac9e3a806b6fb26283b7a3a7277d9648cbe89688c9860","first_computed_at":"2026-05-18T04:21:50.706031Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:50.706031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jUjDhUj6wf3/h0qcBvTfS0+R9xlI5IbZ9ZEM6NON/zluOGMR+xMOR4wwdtVI6xfyGNr/2CX/jpu25YYZdRIPAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:50.706534Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.5460","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e0e2ab7b5889123367ce4b81d5458d1eb7d3772c9b01e6cb6d3bfee2fdc4467","sha256:24bae149fe14840363e5e2861cbf72e36e3791bfe8e11667f647f4684a091ee5"],"state_sha256":"2798adb034a91eeab73280a08572706ebc59d98ec8752bf4b57f13d3ddb73ce0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tq2/bk333s/sFqoeLnERj2E9DiKPaG8EX5K2GG/m3a1OJB9JJyrcSH8eiQnwi6T7hHti6ULvpGQygdFfJzbYAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T20:48:58.735884Z","bundle_sha256":"ac39025a789bfd3a4e4b0408d0ad7838063f8eefb766753526f7b116eb98e9a9"}}