{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:VIDB52W6C6WLEWEWXEGZDZLKPA","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":"f1db143071133e90a8686176cca8e8cedc68cd418742fe758e551507fbbaad0a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-06T15:17:09Z","title_canon_sha256":"7314791e5897f36f3764beac31a995a71463091833f42ec8ecf69e1ef2841945"},"schema_version":"1.0","source":{"id":"1107.1157","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.1157","created_at":"2026-05-18T04:18:45Z"},{"alias_kind":"arxiv_version","alias_value":"1107.1157v1","created_at":"2026-05-18T04:18:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.1157","created_at":"2026-05-18T04:18:45Z"},{"alias_kind":"pith_short_12","alias_value":"VIDB52W6C6WL","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"VIDB52W6C6WLEWEW","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"VIDB52W6","created_at":"2026-05-18T12:26:44Z"}],"graph_snapshots":[{"event_id":"sha256:3942be7b74aa20383cb731017aec3a7875c33fc4598d5210ce2f2aad11d496e4","target":"graph","created_at":"2026-05-18T04:18:45Z","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":"We present the design and performance of a 2x2 prototype array of corrugated feed-horns in W-band. The module is fabricated using a so-called \"platelet\" technique by milling Aluminum plates. This technique is suitable for low-cost and scalable high performance applications. Room temperature Return Loss measurements show a low (<-30 dB) reflection over a 30% bandwidth with a maximum matching of -42 dB at 100 GHz for all four antennas. Beam pattern measurements indicate good repeatability and a low (-25 dB) sidelobe and crosspolarisation levels. This work is particularly relevant for future Cosm","authors_text":"Adriano De Rosa, Alessandro Simonetto, Andrea Tartari, Aniello Mennella, Cristian Franceschet, Enrico Pagana, Fabrizio Villa, Francesco Cavaliere, Francesco Del Torto, Marco Bersanelli, Mario Zannoni, Massimo Gervasi, Ocleto D'Arcangelo","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-06T15:17:09Z","title":"W-band prototype of platelet feed-horn array for CMB polarisation measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.1157","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:cd15292661ad24178c7e7d0a896cab72dfdb53e97478e65669808a665511e714","target":"record","created_at":"2026-05-18T04:18:45Z","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":"f1db143071133e90a8686176cca8e8cedc68cd418742fe758e551507fbbaad0a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-06T15:17:09Z","title_canon_sha256":"7314791e5897f36f3764beac31a995a71463091833f42ec8ecf69e1ef2841945"},"schema_version":"1.0","source":{"id":"1107.1157","kind":"arxiv","version":1}},"canonical_sha256":"aa061eeade17acb25896b90d91e56a783d9398dbfb0962deb35291a6c4e275dd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa061eeade17acb25896b90d91e56a783d9398dbfb0962deb35291a6c4e275dd","first_computed_at":"2026-05-18T04:18:45.460566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:18:45.460566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CM71LsUBoQF7iTR17uqTsjibNOaaiNx469IMF2PtJRpBLHYf9Zxjo+Y/3VlpkmOSEGfaKZ8z29JyUYqJUMz2Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:18:45.461250Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.1157","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd15292661ad24178c7e7d0a896cab72dfdb53e97478e65669808a665511e714","sha256:3942be7b74aa20383cb731017aec3a7875c33fc4598d5210ce2f2aad11d496e4"],"state_sha256":"947aebee50ef291e67a9bde0de5acbdf1f31f4474b280b072732b098b5463dbe"}