{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6GKXVPA6OFV6LO443VWOOZFIOL","short_pith_number":"pith:6GKXVPA6","canonical_record":{"source":{"id":"1910.06274","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-14T16:58:20Z","cross_cats_sorted":[],"title_canon_sha256":"fed5e3ed277ffba41d78ce49796fe75a8f176f6bc83a493da2492dfe08ca50d9","abstract_canon_sha256":"7212e5f7017f614337afbcb0131cd5a229bf7aaa36a65b1c75d0c070bf9cec3c"},"schema_version":"1.0"},"canonical_sha256":"f1957abc1e716be5bb9cdd6ce764a872f7438c2f6b520dcdfc3b9cb1567f7aca","source":{"kind":"arxiv","id":"1910.06274","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.06274","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"arxiv_version","alias_value":"1910.06274v2","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.06274","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"pith_short_12","alias_value":"6GKXVPA6OFV6","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"pith_short_16","alias_value":"6GKXVPA6OFV6LO44","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"pith_short_8","alias_value":"6GKXVPA6","created_at":"2026-07-05T01:08:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6GKXVPA6OFV6LO443VWOOZFIOL","target":"record","payload":{"canonical_record":{"source":{"id":"1910.06274","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-14T16:58:20Z","cross_cats_sorted":[],"title_canon_sha256":"fed5e3ed277ffba41d78ce49796fe75a8f176f6bc83a493da2492dfe08ca50d9","abstract_canon_sha256":"7212e5f7017f614337afbcb0131cd5a229bf7aaa36a65b1c75d0c070bf9cec3c"},"schema_version":"1.0"},"canonical_sha256":"f1957abc1e716be5bb9cdd6ce764a872f7438c2f6b520dcdfc3b9cb1567f7aca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:08:50.179369Z","signature_b64":"+75zqgwUtRpC4VOzesdIaZf1bynxxD0S8FiRhLPrywYR9X1uWGt8lHFs8bgvTpqeF44kGqwflC2sNkRLqf6pCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f1957abc1e716be5bb9cdd6ce764a872f7438c2f6b520dcdfc3b9cb1567f7aca","last_reissued_at":"2026-07-05T01:08:50.178946Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:08:50.178946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1910.06274","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":"2026-07-05T01:08:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sqj0TQfWvfbr/6u0G3U09XJoYeQohqz9N4X+uY5igF7iIO32NctWRL2qOsy0rB822pOWsBJlZaumhkRVzazVAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T17:53:52.244595Z"},"content_sha256":"6be5722a4db0fa3a8a36114817b8265fe2707407baed29843623de3e7a29fdf8","schema_version":"1.0","event_id":"sha256:6be5722a4db0fa3a8a36114817b8265fe2707407baed29843623de3e7a29fdf8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6GKXVPA6OFV6LO443VWOOZFIOL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Emulating the Global 21-cm Signal from Cosmic Dawn and Reionization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Anastasia Fialkov, Aviad Cohen, Raul Monsalve, Rennan Barkana","submitted_at":"2019-10-14T16:58:20Z","abstract_excerpt":"The 21-cm signal of neutral hydrogen is a sensitive probe of the Epoch of Reionization (EoR) and Cosmic Dawn. Currently operating radio telescopes have ushered in a data-driven era of 21-cm cosmology, providing the first constraints on the astrophysical properties of sources that drive this signal. However, extracting astrophysical information from the data is highly non-trivial and requires the rapid generation of theoretical templates over a wide range of astrophysical parameters. To this end emulators are often employed, with previous efforts focused on predicting the power spectrum. In thi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.06274","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1910.06274/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:08:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LGgrZ5A/6VH5GChOzYatbBi3hsnaKLFB5D3TbKvbTy2ZA8CoHXaDk93EHOpx8jveb90FTjQ1Ld9/BAhCARFqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T17:53:52.245180Z"},"content_sha256":"7ab55988b8fac5bb1d1fa842f698e4a794dbb7992ee2091ca625656b52c7e784","schema_version":"1.0","event_id":"sha256:7ab55988b8fac5bb1d1fa842f698e4a794dbb7992ee2091ca625656b52c7e784"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6GKXVPA6OFV6LO443VWOOZFIOL/bundle.json","state_url":"https://pith.science/pith/6GKXVPA6OFV6LO443VWOOZFIOL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6GKXVPA6OFV6LO443VWOOZFIOL/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":"2026-08-09T17:53:52Z","links":{"resolver":"https://pith.science/pith/6GKXVPA6OFV6LO443VWOOZFIOL","bundle":"https://pith.science/pith/6GKXVPA6OFV6LO443VWOOZFIOL/bundle.json","state":"https://pith.science/pith/6GKXVPA6OFV6LO443VWOOZFIOL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6GKXVPA6OFV6LO443VWOOZFIOL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6GKXVPA6OFV6LO443VWOOZFIOL","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":"7212e5f7017f614337afbcb0131cd5a229bf7aaa36a65b1c75d0c070bf9cec3c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-14T16:58:20Z","title_canon_sha256":"fed5e3ed277ffba41d78ce49796fe75a8f176f6bc83a493da2492dfe08ca50d9"},"schema_version":"1.0","source":{"id":"1910.06274","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.06274","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"arxiv_version","alias_value":"1910.06274v2","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.06274","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"pith_short_12","alias_value":"6GKXVPA6OFV6","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"pith_short_16","alias_value":"6GKXVPA6OFV6LO44","created_at":"2026-07-05T01:08:50Z"},{"alias_kind":"pith_short_8","alias_value":"6GKXVPA6","created_at":"2026-07-05T01:08:50Z"}],"graph_snapshots":[{"event_id":"sha256:7ab55988b8fac5bb1d1fa842f698e4a794dbb7992ee2091ca625656b52c7e784","target":"graph","created_at":"2026-07-05T01:08:50Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1910.06274/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The 21-cm signal of neutral hydrogen is a sensitive probe of the Epoch of Reionization (EoR) and Cosmic Dawn. Currently operating radio telescopes have ushered in a data-driven era of 21-cm cosmology, providing the first constraints on the astrophysical properties of sources that drive this signal. However, extracting astrophysical information from the data is highly non-trivial and requires the rapid generation of theoretical templates over a wide range of astrophysical parameters. To this end emulators are often employed, with previous efforts focused on predicting the power spectrum. In thi","authors_text":"Anastasia Fialkov, Aviad Cohen, Raul Monsalve, Rennan Barkana","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-14T16:58:20Z","title":"Emulating the Global 21-cm Signal from Cosmic Dawn and Reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.06274","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":"sha256:6be5722a4db0fa3a8a36114817b8265fe2707407baed29843623de3e7a29fdf8","target":"record","created_at":"2026-07-05T01:08:50Z","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":"7212e5f7017f614337afbcb0131cd5a229bf7aaa36a65b1c75d0c070bf9cec3c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-10-14T16:58:20Z","title_canon_sha256":"fed5e3ed277ffba41d78ce49796fe75a8f176f6bc83a493da2492dfe08ca50d9"},"schema_version":"1.0","source":{"id":"1910.06274","kind":"arxiv","version":2}},"canonical_sha256":"f1957abc1e716be5bb9cdd6ce764a872f7438c2f6b520dcdfc3b9cb1567f7aca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f1957abc1e716be5bb9cdd6ce764a872f7438c2f6b520dcdfc3b9cb1567f7aca","first_computed_at":"2026-07-05T01:08:50.178946Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:08:50.178946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+75zqgwUtRpC4VOzesdIaZf1bynxxD0S8FiRhLPrywYR9X1uWGt8lHFs8bgvTpqeF44kGqwflC2sNkRLqf6pCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:08:50.179369Z","signed_message":"canonical_sha256_bytes"},"source_id":"1910.06274","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6be5722a4db0fa3a8a36114817b8265fe2707407baed29843623de3e7a29fdf8","sha256:7ab55988b8fac5bb1d1fa842f698e4a794dbb7992ee2091ca625656b52c7e784"],"state_sha256":"b57ba648a892f2c69ca7dc95eeeac801ee317b2b0f9a7169ebbc7cfc187a053d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xVDA5HDIgQxD2+eX4k7LM61NU2yoNvl0/RDEQFNVf1PJYcdcLdW5CFKf6tX2+GCu2LT8UWVoEaJmsNQgDeuZAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T17:53:52.250285Z","bundle_sha256":"b448ad8a48e3dc36bf07968b6a6766ab37e0d5d83a7afca6c9cce7958a1c69d7"}}