{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NP2H3MPOVU6WFL3Y7BEDVJN5EY","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":"d2a4fb13bafed2256f4b97b95e40ea48f498b9295b6619909cb700ca93283f92","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-18T18:00:03Z","title_canon_sha256":"722633b0062e5a58876949ffa5912dd44add6ca7a37e2e0bd21811a5059c9c58"},"schema_version":"1.0","source":{"id":"1906.07735","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07735","created_at":"2026-07-05T00:01:56Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07735v2","created_at":"2026-07-05T00:01:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07735","created_at":"2026-07-05T00:01:56Z"},{"alias_kind":"pith_short_12","alias_value":"NP2H3MPOVU6W","created_at":"2026-07-05T00:01:56Z"},{"alias_kind":"pith_short_16","alias_value":"NP2H3MPOVU6WFL3Y","created_at":"2026-07-05T00:01:56Z"},{"alias_kind":"pith_short_8","alias_value":"NP2H3MPO","created_at":"2026-07-05T00:01:56Z"}],"graph_snapshots":[{"event_id":"sha256:a69d9178a178642e4a69e84ffd9ba87e5c55480cb199107363ecf19b6b33ad15","target":"graph","created_at":"2026-07-05T00:01:56Z","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/1906.07735/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The discoveries of a number of binary black hole mergers by LIGO and VIRGO has reinvigorated the interest that primordial black holes (PBHs) of tens of solar masses could contribute non-negligibly to the dark matter energy density. Should even a small population of PBHs with masses $\\gtrsim \\mathcal{O}(M_\\odot)$ exist, they could profoundly impact the properties of the intergalactic medium and provide insight into novel processes at work in the early Universe. We demonstrate here that observations of the 21cm transition in neutral hydrogen during the epochs of reionization and cosmic dawn will","authors_text":"Olga Mena, Pablo Villanueva-Domingo, Samuel J. Witte, Sergio Palomares-Ruiz","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-18T18:00:03Z","title":"Constraining the primordial black hole abundance with 21cm cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07735","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":"sha256:2962f40f4a5912990355e4401bf9a6392ef23f78546edf069cf20ed30b6a61bd","target":"record","created_at":"2026-07-05T00:01:56Z","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":"d2a4fb13bafed2256f4b97b95e40ea48f498b9295b6619909cb700ca93283f92","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-06-18T18:00:03Z","title_canon_sha256":"722633b0062e5a58876949ffa5912dd44add6ca7a37e2e0bd21811a5059c9c58"},"schema_version":"1.0","source":{"id":"1906.07735","kind":"arxiv","version":2}},"canonical_sha256":"6bf47db1eead3d62af78f8483aa5bd261740856beb3f1cd1ef0722f28acd7206","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6bf47db1eead3d62af78f8483aa5bd261740856beb3f1cd1ef0722f28acd7206","first_computed_at":"2026-07-05T00:01:56.136028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:01:56.136028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0CTmv0I6e7wJKVYRM/nHgImp8FR+u66XR3FKs803r+t9OWZnPmOIo2HqahtmAHbsXgIJvDjf8ko+s0HgD/oACg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:01:56.136465Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.07735","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2962f40f4a5912990355e4401bf9a6392ef23f78546edf069cf20ed30b6a61bd","sha256:a69d9178a178642e4a69e84ffd9ba87e5c55480cb199107363ecf19b6b33ad15"],"state_sha256":"6905070842a4f48c40ab4b8de8257a17c751ff803630e18fb343c5103e23688d"}