{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:MYDVZJPYIY3A4CFVCALEMINZXV","short_pith_number":"pith:MYDVZJPY","canonical_record":{"source":{"id":"1602.08433","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-02-26T18:42:55Z","cross_cats_sorted":["astro-ph.HE","hep-ph"],"title_canon_sha256":"bcf093c02403c9b154fc68beb2edffb6457d850a9d03630cd56403d115ae0673","abstract_canon_sha256":"5558bf0fadaf3652123fc0f3324c0c9150f9f654601d8ff24a501ab2a310abf5"},"schema_version":"1.0"},"canonical_sha256":"66075ca5f846360e08b510164621b9bd59f6e35aed95b868c9253ceb54b21a5b","source":{"kind":"arxiv","id":"1602.08433","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08433","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08433v2","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08433","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"pith_short_12","alias_value":"MYDVZJPYIY3A","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MYDVZJPYIY3A4CFV","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MYDVZJPY","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:MYDVZJPYIY3A4CFVCALEMINZXV","target":"record","payload":{"canonical_record":{"source":{"id":"1602.08433","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-02-26T18:42:55Z","cross_cats_sorted":["astro-ph.HE","hep-ph"],"title_canon_sha256":"bcf093c02403c9b154fc68beb2edffb6457d850a9d03630cd56403d115ae0673","abstract_canon_sha256":"5558bf0fadaf3652123fc0f3324c0c9150f9f654601d8ff24a501ab2a310abf5"},"schema_version":"1.0"},"canonical_sha256":"66075ca5f846360e08b510164621b9bd59f6e35aed95b868c9253ceb54b21a5b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:55.125240Z","signature_b64":"wjQWginpLjF3X5jvQ8GuHn5pC+4OHU1O5EnFOLNewmqZfvCWbZTDMN/L3Jh27m8R+GfVoNlwrafZtWqVN8w/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66075ca5f846360e08b510164621b9bd59f6e35aed95b868c9253ceb54b21a5b","last_reissued_at":"2026-05-18T01:13:55.124535Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:55.124535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.08433","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":"2026-05-18T01:13:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FAChGLIia1JrhZVLLcoltOVlb3NUi9M3lTUK5bBDUWAhpkH7BEIqFnpGiQ4OmScyipqf+R5/iV/AZuazZzA9BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:13:29.935295Z"},"content_sha256":"129fd4dc0ac5a19df0b648a88506ae9f8a8133ec373c95a004ba75ab31e355e8","schema_version":"1.0","event_id":"sha256:129fd4dc0ac5a19df0b648a88506ae9f8a8133ec373c95a004ba75ab31e355e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:MYDVZJPYIY3A4CFVCALEMINZXV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reionization during the dark ages from a cosmic axion background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Mirizzi, Carmelo Evoli, Daniele Montanino, Matteo Leo","submitted_at":"2016-02-26T18:42:55Z","abstract_excerpt":"Recently it has been pointed out that a cosmic background of relativistic axion-like particles (ALPs) would be produced by the primordial decays of heavy fields in the post-inflation epoch, contributing to the extra-radiation content in the Universe today. Primordial magnetic fields would trigger conversions of these ALPs into sub-MeV photons during the dark ages. This photon flux would produce an early reionization of the Universe, leaving a significant imprint on the total optical depth to recombination $\\tau$. Using the current measurement of $\\tau$ and the limit on the extra-radiation cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08433","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":"2026-05-18T01:13:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6WhcksLxj3ByjM3ZxJ8snFdkNXnVETg75giLZuRLhkdsGjtkM+b5MHnXF7zpmDIWKws8KSgLsoPUA9z88NBJDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:13:29.935674Z"},"content_sha256":"e4b9e762e59918b2130e7c2bd3fef4a001f959f508a380114eb89f66828bc68e","schema_version":"1.0","event_id":"sha256:e4b9e762e59918b2130e7c2bd3fef4a001f959f508a380114eb89f66828bc68e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYDVZJPYIY3A4CFVCALEMINZXV/bundle.json","state_url":"https://pith.science/pith/MYDVZJPYIY3A4CFVCALEMINZXV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYDVZJPYIY3A4CFVCALEMINZXV/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":"2026-05-28T06:13:29Z","links":{"resolver":"https://pith.science/pith/MYDVZJPYIY3A4CFVCALEMINZXV","bundle":"https://pith.science/pith/MYDVZJPYIY3A4CFVCALEMINZXV/bundle.json","state":"https://pith.science/pith/MYDVZJPYIY3A4CFVCALEMINZXV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYDVZJPYIY3A4CFVCALEMINZXV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MYDVZJPYIY3A4CFVCALEMINZXV","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":"5558bf0fadaf3652123fc0f3324c0c9150f9f654601d8ff24a501ab2a310abf5","cross_cats_sorted":["astro-ph.HE","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-02-26T18:42:55Z","title_canon_sha256":"bcf093c02403c9b154fc68beb2edffb6457d850a9d03630cd56403d115ae0673"},"schema_version":"1.0","source":{"id":"1602.08433","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08433","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08433v2","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08433","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"pith_short_12","alias_value":"MYDVZJPYIY3A","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MYDVZJPYIY3A4CFV","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MYDVZJPY","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:e4b9e762e59918b2130e7c2bd3fef4a001f959f508a380114eb89f66828bc68e","target":"graph","created_at":"2026-05-18T01:13:55Z","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":"Recently it has been pointed out that a cosmic background of relativistic axion-like particles (ALPs) would be produced by the primordial decays of heavy fields in the post-inflation epoch, contributing to the extra-radiation content in the Universe today. Primordial magnetic fields would trigger conversions of these ALPs into sub-MeV photons during the dark ages. This photon flux would produce an early reionization of the Universe, leaving a significant imprint on the total optical depth to recombination $\\tau$. Using the current measurement of $\\tau$ and the limit on the extra-radiation cont","authors_text":"Alessandro Mirizzi, Carmelo Evoli, Daniele Montanino, Matteo Leo","cross_cats":["astro-ph.HE","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-02-26T18:42:55Z","title":"Reionization during the dark ages from a cosmic axion background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08433","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":"sha256:129fd4dc0ac5a19df0b648a88506ae9f8a8133ec373c95a004ba75ab31e355e8","target":"record","created_at":"2026-05-18T01:13:55Z","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":"5558bf0fadaf3652123fc0f3324c0c9150f9f654601d8ff24a501ab2a310abf5","cross_cats_sorted":["astro-ph.HE","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-02-26T18:42:55Z","title_canon_sha256":"bcf093c02403c9b154fc68beb2edffb6457d850a9d03630cd56403d115ae0673"},"schema_version":"1.0","source":{"id":"1602.08433","kind":"arxiv","version":2}},"canonical_sha256":"66075ca5f846360e08b510164621b9bd59f6e35aed95b868c9253ceb54b21a5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66075ca5f846360e08b510164621b9bd59f6e35aed95b868c9253ceb54b21a5b","first_computed_at":"2026-05-18T01:13:55.124535Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:55.124535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wjQWginpLjF3X5jvQ8GuHn5pC+4OHU1O5EnFOLNewmqZfvCWbZTDMN/L3Jh27m8R+GfVoNlwrafZtWqVN8w/DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:55.125240Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.08433","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:129fd4dc0ac5a19df0b648a88506ae9f8a8133ec373c95a004ba75ab31e355e8","sha256:e4b9e762e59918b2130e7c2bd3fef4a001f959f508a380114eb89f66828bc68e"],"state_sha256":"0771a50ba04083662dc8b4a58138d55e88f66ef01bab94a6d18897ff75d534d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SvGpGD22hQeO9ONQykrNRoub3rwvg6C4K32IQwJHoh0jp+BGoAzI7OyO+0BjkudypYGZhevosHH0a//XTzqrDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:13:29.937726Z","bundle_sha256":"206b566cfe41648c1088020b62a0dcc4da5f0c102067fb5d9a403c96e2432c72"}}