{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:27MRL2TUCDXFE3KDGIB572JPOX","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":"65e5bf613a29da658d46e5e40b9578e80b606a341563b247b4e2eab6f33c8696","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-04T12:54:59Z","title_canon_sha256":"4b6332d9e997a8bcb23e81798578308eeb50bbf4d993f4f5c9e5840470a3b3ee"},"schema_version":"1.0","source":{"id":"2506.03900","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.03900","created_at":"2026-07-05T11:28:17Z"},{"alias_kind":"arxiv_version","alias_value":"2506.03900v1","created_at":"2026-07-05T11:28:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.03900","created_at":"2026-07-05T11:28:17Z"},{"alias_kind":"pith_short_12","alias_value":"27MRL2TUCDXF","created_at":"2026-07-05T11:28:17Z"},{"alias_kind":"pith_short_16","alias_value":"27MRL2TUCDXFE3KD","created_at":"2026-07-05T11:28:17Z"},{"alias_kind":"pith_short_8","alias_value":"27MRL2TU","created_at":"2026-07-05T11:28:17Z"}],"graph_snapshots":[{"event_id":"sha256:3319ca019fb434ed2e5a9717fd5197a16f9570b063079c02161a7541500eb16f","target":"graph","created_at":"2026-07-05T11:28:17Z","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/2506.03900/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"L-BASS is an instrument designed to make radiometric temperature measurements of the sky with an absolute accuracy of better than 0.1 K at 1.4 GHz. This will be achieved in two steps: first by measuring the sky temperature relative to that of the North Celestial Pole, using two horn-based antennas, and second with the sky antenna replaced with a calibrated cryogenic load to measure the absolute brightness temperature of the North Celesial Pole. Here we describe the design of the L-BASS two-antenna system and report on laboratory measurements to establish its performance at component and sub-sy","authors_text":"C. J. Radcliffe, D. P. Zerafa, I. W. A. Browne, J. P. Leahy, P. J. Black, P. N. Wilkinson","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-04T12:54:59Z","title":"L-BASS: A project to produce an absolutely calibrated 1.4 GHz sky map. II -- Technical Description of the System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.03900","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":"sha256:20f56ee52d393e8e859552dd4f03879ea051be980114492a55399288e0cdc61b","target":"record","created_at":"2026-07-05T11:28:17Z","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":"65e5bf613a29da658d46e5e40b9578e80b606a341563b247b4e2eab6f33c8696","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-04T12:54:59Z","title_canon_sha256":"4b6332d9e997a8bcb23e81798578308eeb50bbf4d993f4f5c9e5840470a3b3ee"},"schema_version":"1.0","source":{"id":"2506.03900","kind":"arxiv","version":1}},"canonical_sha256":"d7d915ea7410ee526d433203dfe92f75cb6214ae75039dd3abd44e941e6aea23","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7d915ea7410ee526d433203dfe92f75cb6214ae75039dd3abd44e941e6aea23","first_computed_at":"2026-07-05T11:28:17.126868Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:28:17.126868Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A/O7mMVlS/df/cLcgUOEI6crhzRXyNEk47TeSUtsA53ctoh/TPwssFqkGWhRDs3HD0wAtW8W6HIetiR+Yz7oDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:28:17.127369Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.03900","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:20f56ee52d393e8e859552dd4f03879ea051be980114492a55399288e0cdc61b","sha256:3319ca019fb434ed2e5a9717fd5197a16f9570b063079c02161a7541500eb16f"],"state_sha256":"b4d2645638b6537f5543b6b31f76db7f8425a9572ac31723c76443ca088ebb72"}