{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:PYW7VGJIGAEAIEIMJAMY6EJOIA","short_pith_number":"pith:PYW7VGJI","schema_version":"1.0","canonical_sha256":"7e2dfa9928300804110c48198f112e40360d7245a1348aed4eed0e78eee6bba8","source":{"kind":"arxiv","id":"2103.05085","version":1},"attestation_state":"computed","paper":{"title":"Global 21-cm Cosmology from the Farside of the Moon","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Slosar, B. Nhan, D. Rapetti, Jack Burns, J. Bowman, J. Mirocha, K. Tauscher, M. Pivovaroff, M. Pulupa, Richard Bradley, R. MacDowall, S. Furlanetto, Stuart Bale, S.W. Allen, Z. Ahmed","submitted_at":"2021-03-08T21:30:56Z","abstract_excerpt":"One of the last unexplored windows to the cosmos, the Dark Ages and Cosmic Dawn, can be opened using a simple low frequency radio telescope from the stable, quiet lunar farside to measure the Global 21-cm spectrum. This frontier remains an enormous gap in our knowledge of the Universe. Standard models of physics and cosmology are untested during this critical epoch. The messenger of information about this period is the 1420 MHz (21-cm) radiation from the hyperfine transition of neutral hydrogen, Doppler-shifted to low radio astronomy frequencies by the expansion of the Universe. The Global 21-"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2103.05085","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-03-08T21:30:56Z","cross_cats_sorted":[],"title_canon_sha256":"778f875af30a560f25c24d06f3d91901b9add07a2bae87f2addbb075f762c955","abstract_canon_sha256":"93b3de4c2a98ce2b5930144dbb7fed51b4ce6cef49681b52bf6c935d58a60b90"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:21:22.091667Z","signature_b64":"m+NsrhmyWTqChg4LB6VmGF80m7lsIscGJ1OjFo67W06QjyBfEHtEJIGi+pnstJgwEcSaHzY7CVn9pHwO9EGwAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e2dfa9928300804110c48198f112e40360d7245a1348aed4eed0e78eee6bba8","last_reissued_at":"2026-07-05T02:21:22.091172Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:21:22.091172Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Global 21-cm Cosmology from the Farside of the Moon","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Slosar, B. Nhan, D. Rapetti, Jack Burns, J. Bowman, J. Mirocha, K. Tauscher, M. Pivovaroff, M. Pulupa, Richard Bradley, R. MacDowall, S. Furlanetto, Stuart Bale, S.W. Allen, Z. Ahmed","submitted_at":"2021-03-08T21:30:56Z","abstract_excerpt":"One of the last unexplored windows to the cosmos, the Dark Ages and Cosmic Dawn, can be opened using a simple low frequency radio telescope from the stable, quiet lunar farside to measure the Global 21-cm spectrum. This frontier remains an enormous gap in our knowledge of the Universe. Standard models of physics and cosmology are untested during this critical epoch. The messenger of information about this period is the 1420 MHz (21-cm) radiation from the hyperfine transition of neutral hydrogen, Doppler-shifted to low radio astronomy frequencies by the expansion of the Universe. The Global 21-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.05085","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2103.05085/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2103.05085","created_at":"2026-07-05T02:21:22.091231+00:00"},{"alias_kind":"arxiv_version","alias_value":"2103.05085v1","created_at":"2026-07-05T02:21:22.091231+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.05085","created_at":"2026-07-05T02:21:22.091231+00:00"},{"alias_kind":"pith_short_12","alias_value":"PYW7VGJIGAEA","created_at":"2026-07-05T02:21:22.091231+00:00"},{"alias_kind":"pith_short_16","alias_value":"PYW7VGJIGAEAIEIM","created_at":"2026-07-05T02:21:22.091231+00:00"},{"alias_kind":"pith_short_8","alias_value":"PYW7VGJI","created_at":"2026-07-05T02:21:22.091231+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2203.06142","citing_title":"Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies","ref_index":250,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA","json":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA.json","graph_json":"https://pith.science/api/pith-number/PYW7VGJIGAEAIEIMJAMY6EJOIA/graph.json","events_json":"https://pith.science/api/pith-number/PYW7VGJIGAEAIEIMJAMY6EJOIA/events.json","paper":"https://pith.science/paper/PYW7VGJI"},"agent_actions":{"view_html":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA","download_json":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA.json","view_paper":"https://pith.science/paper/PYW7VGJI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2103.05085&json=true","fetch_graph":"https://pith.science/api/pith-number/PYW7VGJIGAEAIEIMJAMY6EJOIA/graph.json","fetch_events":"https://pith.science/api/pith-number/PYW7VGJIGAEAIEIMJAMY6EJOIA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA/action/storage_attestation","attest_author":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA/action/author_attestation","sign_citation":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA/action/citation_signature","submit_replication":"https://pith.science/pith/PYW7VGJIGAEAIEIMJAMY6EJOIA/action/replication_record"}},"created_at":"2026-07-05T02:21:22.091231+00:00","updated_at":"2026-07-05T02:21:22.091231+00:00"}