{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:WKQIZVI56L2BYIMGCBIDLWGTCB","short_pith_number":"pith:WKQIZVI5","canonical_record":{"source":{"id":"1402.0940","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-02-05T05:49:58Z","cross_cats_sorted":[],"title_canon_sha256":"9bba82227d185d5f4904b17075cfa74df056428fb1702dafbec2c5120b3232cb","abstract_canon_sha256":"58f7650461608f195656268284ca30580697a49e2534277a6556c7db400782ca"},"schema_version":"1.0"},"canonical_sha256":"b2a08cd51df2f41c2186105035d8d3106cff29fa36354149a3cf8221a13b3f57","source":{"kind":"arxiv","id":"1402.0940","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.0940","created_at":"2026-05-18T01:44:47Z"},{"alias_kind":"arxiv_version","alias_value":"1402.0940v1","created_at":"2026-05-18T01:44:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.0940","created_at":"2026-05-18T01:44:47Z"},{"alias_kind":"pith_short_12","alias_value":"WKQIZVI56L2B","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WKQIZVI56L2BYIMG","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WKQIZVI5","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:WKQIZVI56L2BYIMGCBIDLWGTCB","target":"record","payload":{"canonical_record":{"source":{"id":"1402.0940","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-02-05T05:49:58Z","cross_cats_sorted":[],"title_canon_sha256":"9bba82227d185d5f4904b17075cfa74df056428fb1702dafbec2c5120b3232cb","abstract_canon_sha256":"58f7650461608f195656268284ca30580697a49e2534277a6556c7db400782ca"},"schema_version":"1.0"},"canonical_sha256":"b2a08cd51df2f41c2186105035d8d3106cff29fa36354149a3cf8221a13b3f57","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:47.653226Z","signature_b64":"LwyUfXiqM+OGFiLRpTmkcVYbXNJQ0zlMyzcaiOHIg2/WeSkRqeAnVguZhYxmwBvvT6EViz+KmTvTAqxkEd8lCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2a08cd51df2f41c2186105035d8d3106cff29fa36354149a3cf8221a13b3f57","last_reissued_at":"2026-05-18T01:44:47.652586Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:47.652586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.0940","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":"2026-05-18T01:44:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hON4PSxhMyRtpa5Z6PofoPPQJ7rPCRwTyM4hSHNYci/zrZhR4p7zmcMpA9QgGz9RSAe+/Eo24WV2xZSB0q1JBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:11:46.640936Z"},"content_sha256":"2539e243c355664fccda58eed3bc51841f6f4f8d5995d57fea95c17d0ef2fcb9","schema_version":"1.0","event_id":"sha256:2539e243c355664fccda58eed3bc51841f6f4f8d5995d57fea95c17d0ef2fcb9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:WKQIZVI56L2BYIMGCBIDLWGTCB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The observable signature of late heating of the Universe during cosmic reionization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"2), (2) Ecole Normale Superieure, (3) Columbia University, 4) ((1) Tel Aviv University, (4) Harvard University), Anastasia Fialkov (1, Eli Visbal (3, Paris, Rennan Barkana (1)","submitted_at":"2014-02-05T05:49:58Z","abstract_excerpt":"Models and simulations of the epoch of reionization predict that spectra of the 21-cm transition of atomic hydrogen will show a clear fluctuation peak, at a redshift and scale, respectively, that mark the central stage of reionization and the characteristic size of ionized bubbles. This is based on the assumption that the cosmic gas was heated by stellar remnants - particularly X-ray binaries - to temperatures well above the cosmic microwave background at that time (~ 30 K). Here we show instead that the hard spectra (that is, spectra with more high-energy photons than low-energy photons) of X"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0940","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":""},"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":"2026-05-18T01:44:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QjKoL0xlK/Okv8wJb5musZ8Zo7E04cMMbpFW/RPzcUkfjOz1Z1RtqM8OOn20gIlVDQ/E/Av14zqieVXYqIOWCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:11:46.641632Z"},"content_sha256":"72c24702129c5469ad8e0872867d8fd7f379477ad38119f7d9aa196d3cb35779","schema_version":"1.0","event_id":"sha256:72c24702129c5469ad8e0872867d8fd7f379477ad38119f7d9aa196d3cb35779"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WKQIZVI56L2BYIMGCBIDLWGTCB/bundle.json","state_url":"https://pith.science/pith/WKQIZVI56L2BYIMGCBIDLWGTCB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WKQIZVI56L2BYIMGCBIDLWGTCB/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":"2026-05-29T17:11:46Z","links":{"resolver":"https://pith.science/pith/WKQIZVI56L2BYIMGCBIDLWGTCB","bundle":"https://pith.science/pith/WKQIZVI56L2BYIMGCBIDLWGTCB/bundle.json","state":"https://pith.science/pith/WKQIZVI56L2BYIMGCBIDLWGTCB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WKQIZVI56L2BYIMGCBIDLWGTCB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:WKQIZVI56L2BYIMGCBIDLWGTCB","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":"58f7650461608f195656268284ca30580697a49e2534277a6556c7db400782ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-02-05T05:49:58Z","title_canon_sha256":"9bba82227d185d5f4904b17075cfa74df056428fb1702dafbec2c5120b3232cb"},"schema_version":"1.0","source":{"id":"1402.0940","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.0940","created_at":"2026-05-18T01:44:47Z"},{"alias_kind":"arxiv_version","alias_value":"1402.0940v1","created_at":"2026-05-18T01:44:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.0940","created_at":"2026-05-18T01:44:47Z"},{"alias_kind":"pith_short_12","alias_value":"WKQIZVI56L2B","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WKQIZVI56L2BYIMG","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WKQIZVI5","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:72c24702129c5469ad8e0872867d8fd7f379477ad38119f7d9aa196d3cb35779","target":"graph","created_at":"2026-05-18T01:44:47Z","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":"Models and simulations of the epoch of reionization predict that spectra of the 21-cm transition of atomic hydrogen will show a clear fluctuation peak, at a redshift and scale, respectively, that mark the central stage of reionization and the characteristic size of ionized bubbles. This is based on the assumption that the cosmic gas was heated by stellar remnants - particularly X-ray binaries - to temperatures well above the cosmic microwave background at that time (~ 30 K). Here we show instead that the hard spectra (that is, spectra with more high-energy photons than low-energy photons) of X","authors_text":"2), (2) Ecole Normale Superieure, (3) Columbia University, 4) ((1) Tel Aviv University, (4) Harvard University), Anastasia Fialkov (1, Eli Visbal (3, Paris, Rennan Barkana (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-02-05T05:49:58Z","title":"The observable signature of late heating of the Universe during cosmic reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0940","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":"sha256:2539e243c355664fccda58eed3bc51841f6f4f8d5995d57fea95c17d0ef2fcb9","target":"record","created_at":"2026-05-18T01:44:47Z","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":"58f7650461608f195656268284ca30580697a49e2534277a6556c7db400782ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-02-05T05:49:58Z","title_canon_sha256":"9bba82227d185d5f4904b17075cfa74df056428fb1702dafbec2c5120b3232cb"},"schema_version":"1.0","source":{"id":"1402.0940","kind":"arxiv","version":1}},"canonical_sha256":"b2a08cd51df2f41c2186105035d8d3106cff29fa36354149a3cf8221a13b3f57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2a08cd51df2f41c2186105035d8d3106cff29fa36354149a3cf8221a13b3f57","first_computed_at":"2026-05-18T01:44:47.652586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:47.652586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LwyUfXiqM+OGFiLRpTmkcVYbXNJQ0zlMyzcaiOHIg2/WeSkRqeAnVguZhYxmwBvvT6EViz+KmTvTAqxkEd8lCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:47.653226Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.0940","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2539e243c355664fccda58eed3bc51841f6f4f8d5995d57fea95c17d0ef2fcb9","sha256:72c24702129c5469ad8e0872867d8fd7f379477ad38119f7d9aa196d3cb35779"],"state_sha256":"afad8b409ba072a5ae78689c1c1cfbb015587fcb3d5a480824562f95f64f00a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vZ3zPRGdlKDrjPUFw2rbtVHN+Sr/XpIkDz2/KLjb3+4yLkpz5QNh/yavX3mE1oXtMaDnm+FBiPkR68sUKA09CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T17:11:46.645521Z","bundle_sha256":"fa5fa7ab6d4a8c0515aee5612f629eee2dd47dc50a682bac147eb10b8935fdb5"}}