{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:FZRU72SCCONISYUN2AZWOQSELE","short_pith_number":"pith:FZRU72SC","canonical_record":{"source":{"id":"1308.6322","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-28T21:55:07Z","cross_cats_sorted":[],"title_canon_sha256":"02c47e71e4801ffc806954bc10ab58e88130fda53b2eda38544b014dbdf3f444","abstract_canon_sha256":"961c84f3794bc3ad445267d40301fc824079db80e42a562e93f18a2391a98d53"},"schema_version":"1.0"},"canonical_sha256":"2e634fea42139a89628dd033674244593bbb2898f88607a92258b5bba82ce901","source":{"kind":"arxiv","id":"1308.6322","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.6322","created_at":"2026-05-18T01:47:57Z"},{"alias_kind":"arxiv_version","alias_value":"1308.6322v2","created_at":"2026-05-18T01:47:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.6322","created_at":"2026-05-18T01:47:57Z"},{"alias_kind":"pith_short_12","alias_value":"FZRU72SCCONI","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FZRU72SCCONISYUN","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FZRU72SC","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:FZRU72SCCONISYUN2AZWOQSELE","target":"record","payload":{"canonical_record":{"source":{"id":"1308.6322","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-28T21:55:07Z","cross_cats_sorted":[],"title_canon_sha256":"02c47e71e4801ffc806954bc10ab58e88130fda53b2eda38544b014dbdf3f444","abstract_canon_sha256":"961c84f3794bc3ad445267d40301fc824079db80e42a562e93f18a2391a98d53"},"schema_version":"1.0"},"canonical_sha256":"2e634fea42139a89628dd033674244593bbb2898f88607a92258b5bba82ce901","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:57.137097Z","signature_b64":"7J9RTuinsfR551DeZNIcthwcfTVmiH2cLmp8hl4l+Wph1afe2nmg9XhwCO8t3lYrt6CG017ZmIf4f0WvzLT+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e634fea42139a89628dd033674244593bbb2898f88607a92258b5bba82ce901","last_reissued_at":"2026-05-18T01:47:57.136504Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:57.136504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.6322","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":"2026-05-18T01:47:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kVdRnUIWiEnwZ4S7yLhnQJCdM0Iot50LgGB1VfydH+Wa4y6JJ/ih3EYSdR568+YDm7yeAEbSDHVLAIeRFWz3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:25:37.453149Z"},"content_sha256":"3d7a4c3de1285e5a1014458bea2105c012e225089325caaec4945aa6a0b69c86","schema_version":"1.0","event_id":"sha256:3d7a4c3de1285e5a1014458bea2105c012e225089325caaec4945aa6a0b69c86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:FZRU72SCCONISYUN2AZWOQSELE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"What do observations of the Lyman-alpha fraction tell us about reionization?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Adam Lidz, Jessie Taylor","submitted_at":"2013-08-28T21:55:07Z","abstract_excerpt":"An appealing approach for studying the reionization history of the Universe is to measure the redshift evolution of the Lyman-alpha fraction, the percentage of Lyman-break selected galaxies that emit appreciably in the Ly-alpha line. This fraction is expected to fall-off towards high redshift as the intergalactic medium becomes significantly neutral, and the galaxies' Ly-alpha emission is progressively attenuated. Intriguingly, early measurements with this technique suggest a strong drop in the Ly-alpha fraction near z ~ 7. Previous work concluded that this requires a surprisingly neutral inte"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.6322","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":""},"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":"2026-05-18T01:47:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w18zsDSYk5OaAiboFlaCdI+sOej4FB+6h1YR7xcI0I3THAYtS4/aLPCyNRl25wNfFrBLsCuSHsMymOm7J40fCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:25:37.453922Z"},"content_sha256":"19b3505d94708d0e0d0b30f0450d2aeb768c9deda855041942c99be3f27390ec","schema_version":"1.0","event_id":"sha256:19b3505d94708d0e0d0b30f0450d2aeb768c9deda855041942c99be3f27390ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FZRU72SCCONISYUN2AZWOQSELE/bundle.json","state_url":"https://pith.science/pith/FZRU72SCCONISYUN2AZWOQSELE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FZRU72SCCONISYUN2AZWOQSELE/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":"2026-05-25T15:25:37Z","links":{"resolver":"https://pith.science/pith/FZRU72SCCONISYUN2AZWOQSELE","bundle":"https://pith.science/pith/FZRU72SCCONISYUN2AZWOQSELE/bundle.json","state":"https://pith.science/pith/FZRU72SCCONISYUN2AZWOQSELE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FZRU72SCCONISYUN2AZWOQSELE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FZRU72SCCONISYUN2AZWOQSELE","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":"961c84f3794bc3ad445267d40301fc824079db80e42a562e93f18a2391a98d53","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-28T21:55:07Z","title_canon_sha256":"02c47e71e4801ffc806954bc10ab58e88130fda53b2eda38544b014dbdf3f444"},"schema_version":"1.0","source":{"id":"1308.6322","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.6322","created_at":"2026-05-18T01:47:57Z"},{"alias_kind":"arxiv_version","alias_value":"1308.6322v2","created_at":"2026-05-18T01:47:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.6322","created_at":"2026-05-18T01:47:57Z"},{"alias_kind":"pith_short_12","alias_value":"FZRU72SCCONI","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FZRU72SCCONISYUN","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FZRU72SC","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:19b3505d94708d0e0d0b30f0450d2aeb768c9deda855041942c99be3f27390ec","target":"graph","created_at":"2026-05-18T01:47:57Z","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":"An appealing approach for studying the reionization history of the Universe is to measure the redshift evolution of the Lyman-alpha fraction, the percentage of Lyman-break selected galaxies that emit appreciably in the Ly-alpha line. This fraction is expected to fall-off towards high redshift as the intergalactic medium becomes significantly neutral, and the galaxies' Ly-alpha emission is progressively attenuated. Intriguingly, early measurements with this technique suggest a strong drop in the Ly-alpha fraction near z ~ 7. Previous work concluded that this requires a surprisingly neutral inte","authors_text":"Adam Lidz, Jessie Taylor","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-28T21:55:07Z","title":"What do observations of the Lyman-alpha fraction tell us about reionization?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.6322","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":"sha256:3d7a4c3de1285e5a1014458bea2105c012e225089325caaec4945aa6a0b69c86","target":"record","created_at":"2026-05-18T01:47:57Z","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":"961c84f3794bc3ad445267d40301fc824079db80e42a562e93f18a2391a98d53","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-28T21:55:07Z","title_canon_sha256":"02c47e71e4801ffc806954bc10ab58e88130fda53b2eda38544b014dbdf3f444"},"schema_version":"1.0","source":{"id":"1308.6322","kind":"arxiv","version":2}},"canonical_sha256":"2e634fea42139a89628dd033674244593bbb2898f88607a92258b5bba82ce901","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e634fea42139a89628dd033674244593bbb2898f88607a92258b5bba82ce901","first_computed_at":"2026-05-18T01:47:57.136504Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:57.136504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7J9RTuinsfR551DeZNIcthwcfTVmiH2cLmp8hl4l+Wph1afe2nmg9XhwCO8t3lYrt6CG017ZmIf4f0WvzLT+Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:57.137097Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.6322","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d7a4c3de1285e5a1014458bea2105c012e225089325caaec4945aa6a0b69c86","sha256:19b3505d94708d0e0d0b30f0450d2aeb768c9deda855041942c99be3f27390ec"],"state_sha256":"a6a6a51e2753360ae3cbce129654b635f82a8790fe64e9651ceeee174bd471d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s1WwkhexpGTKxHWInQ1QXczyT/2ST3akb66e9jDkdDHk9+/vlDXJVhNqJzwbwBrH65xL/T+slos1kevTYszXDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:25:37.465019Z","bundle_sha256":"ee8289c7dcacbd43dc3481ea46a4e8024330451d5bd57767310ac1ed66bd0e23"}}