{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:MNUZ4GCLDNC2PAXAYYQDELF37E","short_pith_number":"pith:MNUZ4GCL","canonical_record":{"source":{"id":"1903.06240","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-03-14T20:34:46Z","cross_cats_sorted":[],"title_canon_sha256":"822d4845cfc8ff5f0ae782c8057769f0a22e97abb98fe49c2373e8fd0c34904c","abstract_canon_sha256":"ad03a17f6ff1ca5ddc1200c711aa50f347b40371f858403fa8f6c050e6818fc4"},"schema_version":"1.0"},"canonical_sha256":"63699e184b1b45a782e0c620322cbbf93f0c9075e3e83904fdf3792ce9a9b545","source":{"kind":"arxiv","id":"1903.06240","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06240","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06240v1","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06240","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"pith_short_12","alias_value":"MNUZ4GCLDNC2","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"MNUZ4GCLDNC2PAXA","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"MNUZ4GCL","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:MNUZ4GCLDNC2PAXAYYQDELF37E","target":"record","payload":{"canonical_record":{"source":{"id":"1903.06240","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-03-14T20:34:46Z","cross_cats_sorted":[],"title_canon_sha256":"822d4845cfc8ff5f0ae782c8057769f0a22e97abb98fe49c2373e8fd0c34904c","abstract_canon_sha256":"ad03a17f6ff1ca5ddc1200c711aa50f347b40371f858403fa8f6c050e6818fc4"},"schema_version":"1.0"},"canonical_sha256":"63699e184b1b45a782e0c620322cbbf93f0c9075e3e83904fdf3792ce9a9b545","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:11.400150Z","signature_b64":"YeCM88siLxfe3Ur9/VPjruMOEUwOe6DRNEanAZRi35Vf2+WoPYLWWlWDA+q86XEIX7X7j3nIUjxUALmjr7LeAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"63699e184b1b45a782e0c620322cbbf93f0c9075e3e83904fdf3792ce9a9b545","last_reissued_at":"2026-05-17T23:51:11.399632Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:11.399632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.06240","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":"2026-05-17T23:51:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NiJdG8S8YDr/rkCdF55cH0AtdJc4M0vI0WUX5wp43m7dZ8r8/86G3ZgZSGssbGhPoipAbyb0ZmwK2EQh3/sNDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:47:26.707624Z"},"content_sha256":"c91080f92d7c377965a4f7006fe49ebc2cbc32121023802bd3ff8ec39a9bdf99","schema_version":"1.0","event_id":"sha256:c91080f92d7c377965a4f7006fe49ebc2cbc32121023802bd3ff8ec39a9bdf99"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:MNUZ4GCLDNC2PAXAYYQDELF37E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmology with the Highly Redshifted 21cm Line","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Aaron Parsons, Adam Beardsley, Adam Lidz, Adrian Liu, Anastasia Fialkov, Andrei Mesinger, Benjamin Saliwanchik, Bryna Hazelton, Cora Dvorkin, Daniel Jacobs, David DeBoer, Eli Visbal, Ely Kovetz, George Becker, Hsin Chiang, Hy Trac, Isabella P. Carucci, Jack Burns, Jacqueline Hewitt, James Aguirre, Joanne Cohn, Jonathan Pober, Jonathan Pritchard, Jonathan Sievers, Jordan Mirocha, Joshua Dillon, Judd Bowman, Julian Munoz, Kirit Karkare, Kiyoshi Masui, Laura Newburgh, Leon Koopmans, Marcelo Alvarez, Marc Klein Wolt, Matias Zaldarriaga, Nick Gnedin, Nithyanandan Thyagarajan, Olivier Dor\\'e, Patrick Breysse, Paul La Plante, Philip Bull, Saul Kohn, Steven Furlanetto, Steven Murray, Tzu-Ching Chang, Volker Bromm, Xuelei Chen, Yacine Ali-Haimoud, Yi Mao, Yin-Zhe Ma","submitted_at":"2019-03-14T20:34:46Z","abstract_excerpt":"In addition to being a probe of Cosmic Dawn and Epoch of Reionization astrophysics, the 21cm line at $z>6$ is also a powerful way to constrain cosmology. Its power derives from several unique capabilities. First, the 21cm line is sensitive to energy injections into the intergalactic medium at high redshifts. It also increases the number of measurable modes compared to existing cosmological probes by orders of magnitude. Many of these modes are on smaller scales than are accessible via the CMB, and moreover have the advantage of being firmly in the linear regime (making them easy to model theor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06240","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":"2026-05-17T23:51:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PY/Jm6YNfi2DzHuQevsFyznXAaWrEBVc5Un2i4ohyTSTomdl4SlxG0TyCqCDo+8zNXsWik4WBq45AzRIl/LFDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:47:26.708262Z"},"content_sha256":"57ea471c65cb0e72fd19f44cd308cc12f7ac84c58869f99a61786dbacb6632c7","schema_version":"1.0","event_id":"sha256:57ea471c65cb0e72fd19f44cd308cc12f7ac84c58869f99a61786dbacb6632c7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MNUZ4GCLDNC2PAXAYYQDELF37E/bundle.json","state_url":"https://pith.science/pith/MNUZ4GCLDNC2PAXAYYQDELF37E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MNUZ4GCLDNC2PAXAYYQDELF37E/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":"2026-05-25T13:47:26Z","links":{"resolver":"https://pith.science/pith/MNUZ4GCLDNC2PAXAYYQDELF37E","bundle":"https://pith.science/pith/MNUZ4GCLDNC2PAXAYYQDELF37E/bundle.json","state":"https://pith.science/pith/MNUZ4GCLDNC2PAXAYYQDELF37E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MNUZ4GCLDNC2PAXAYYQDELF37E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:MNUZ4GCLDNC2PAXAYYQDELF37E","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":"ad03a17f6ff1ca5ddc1200c711aa50f347b40371f858403fa8f6c050e6818fc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-03-14T20:34:46Z","title_canon_sha256":"822d4845cfc8ff5f0ae782c8057769f0a22e97abb98fe49c2373e8fd0c34904c"},"schema_version":"1.0","source":{"id":"1903.06240","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06240","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06240v1","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06240","created_at":"2026-05-17T23:51:11Z"},{"alias_kind":"pith_short_12","alias_value":"MNUZ4GCLDNC2","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"MNUZ4GCLDNC2PAXA","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"MNUZ4GCL","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:57ea471c65cb0e72fd19f44cd308cc12f7ac84c58869f99a61786dbacb6632c7","target":"graph","created_at":"2026-05-17T23:51:11Z","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":"In addition to being a probe of Cosmic Dawn and Epoch of Reionization astrophysics, the 21cm line at $z>6$ is also a powerful way to constrain cosmology. Its power derives from several unique capabilities. First, the 21cm line is sensitive to energy injections into the intergalactic medium at high redshifts. It also increases the number of measurable modes compared to existing cosmological probes by orders of magnitude. Many of these modes are on smaller scales than are accessible via the CMB, and moreover have the advantage of being firmly in the linear regime (making them easy to model theor","authors_text":"Aaron Parsons, Adam Beardsley, Adam Lidz, Adrian Liu, Anastasia Fialkov, Andrei Mesinger, Benjamin Saliwanchik, Bryna Hazelton, Cora Dvorkin, Daniel Jacobs, David DeBoer, Eli Visbal, Ely Kovetz, George Becker, Hsin Chiang, Hy Trac, Isabella P. Carucci, Jack Burns, Jacqueline Hewitt, James Aguirre, Joanne Cohn, Jonathan Pober, Jonathan Pritchard, Jonathan Sievers, Jordan Mirocha, Joshua Dillon, Judd Bowman, Julian Munoz, Kirit Karkare, Kiyoshi Masui, Laura Newburgh, Leon Koopmans, Marcelo Alvarez, Marc Klein Wolt, Matias Zaldarriaga, Nick Gnedin, Nithyanandan Thyagarajan, Olivier Dor\\'e, Patrick Breysse, Paul La Plante, Philip Bull, Saul Kohn, Steven Furlanetto, Steven Murray, Tzu-Ching Chang, Volker Bromm, Xuelei Chen, Yacine Ali-Haimoud, Yi Mao, Yin-Zhe Ma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-03-14T20:34:46Z","title":"Cosmology with the Highly Redshifted 21cm Line"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06240","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:c91080f92d7c377965a4f7006fe49ebc2cbc32121023802bd3ff8ec39a9bdf99","target":"record","created_at":"2026-05-17T23:51:11Z","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":"ad03a17f6ff1ca5ddc1200c711aa50f347b40371f858403fa8f6c050e6818fc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-03-14T20:34:46Z","title_canon_sha256":"822d4845cfc8ff5f0ae782c8057769f0a22e97abb98fe49c2373e8fd0c34904c"},"schema_version":"1.0","source":{"id":"1903.06240","kind":"arxiv","version":1}},"canonical_sha256":"63699e184b1b45a782e0c620322cbbf93f0c9075e3e83904fdf3792ce9a9b545","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"63699e184b1b45a782e0c620322cbbf93f0c9075e3e83904fdf3792ce9a9b545","first_computed_at":"2026-05-17T23:51:11.399632Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:11.399632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YeCM88siLxfe3Ur9/VPjruMOEUwOe6DRNEanAZRi35Vf2+WoPYLWWlWDA+q86XEIX7X7j3nIUjxUALmjr7LeAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:11.400150Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.06240","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c91080f92d7c377965a4f7006fe49ebc2cbc32121023802bd3ff8ec39a9bdf99","sha256:57ea471c65cb0e72fd19f44cd308cc12f7ac84c58869f99a61786dbacb6632c7"],"state_sha256":"4b72bb5b8e09057d85c7f6e23b612c9b3ff5784c39343d1fffcd3266b4734fa8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l12FbUM4xdnIUzNahJWmdqlqp2cWOWJ+H38e6D/xT/XACqqf+xEY3EAwiiYcx2HPqCaLtbFIDEajvHnj6z8bCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:47:26.712004Z","bundle_sha256":"baa8f818ffaa8b8bea4d2a6610e44811e1041d7dad7bf8d42c39cb9858a6af94"}}