{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:O3PR3YE3AAJ5SW3SAEMHFJGC7N","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":"459a2efa93c42875f5633bad92c318d22c5a5abad3a61cbdbfd6a758ff30cec5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-09T18:56:32Z","title_canon_sha256":"656277fa7fa37d33a5f1536d572b34e5818cb6d75bd50a5f2e48e5b5c2a29fe7"},"schema_version":"1.0","source":{"id":"1407.2584","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2584","created_at":"2026-05-18T01:42:38Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2584v1","created_at":"2026-05-18T01:42:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2584","created_at":"2026-05-18T01:42:38Z"},{"alias_kind":"pith_short_12","alias_value":"O3PR3YE3AAJ5","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"O3PR3YE3AAJ5SW3S","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"O3PR3YE3","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:2e1505bfb4daf632b6ce5aea78503032b54df8b7920a80fb2e5cfebcd33c84d4","target":"graph","created_at":"2026-05-18T01:42:38Z","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":"The Primordial Inflation Polarization Explorer (PIPER) is a balloon-borne cosmic microwave background (CMB) polarimeter designed to search for evidence of inflation by measuring the large-angular scale CMB polarization signal. BICEP2 recently reported a detection of B-mode power corresponding to the tensor-to-scalar ratio r = 0.2 on ~2 degree scales. If the BICEP2 signal is caused by inflationary gravitational waves (IGWs), then there should be a corresponding increase in B-mode power on angular scales larger than 18 degrees. PIPER is currently the only suborbital instrument capable of fully t","authors_text":"Alan Kogut, Amy Weston, Bradley Johnson, Carole E. Tucker, Charles L. Bennett, Christine Jhabvala, Dale J. Fixsen, David T. Chuss, Dominic Benford, Edward J. Wollack, Elmer Sharp, Eric R. Switzer, Gary F. Hinshaw, Gene Hilton, James Hinderks, Jeff J. McMahon, Jessie L. Dotson, Johannes G. Staguhn, Joseph R. Eimer, Justin Lazear, Kent Irwin, Luke Lowe, Mark Halpern, Paul Mirel, Peter A. R. Ade, Samelys Rodriguez, S. Harvey Moseley, Timothy M. Miller","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-09T18:56:32Z","title":"The Primordial Inflation Polarization Explorer (PIPER)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2584","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":"sha256:77444bd2587cae807001cfc6d5d2024a98f1769947e8122066650c98515933e5","target":"record","created_at":"2026-05-18T01:42:38Z","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":"459a2efa93c42875f5633bad92c318d22c5a5abad3a61cbdbfd6a758ff30cec5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-09T18:56:32Z","title_canon_sha256":"656277fa7fa37d33a5f1536d572b34e5818cb6d75bd50a5f2e48e5b5c2a29fe7"},"schema_version":"1.0","source":{"id":"1407.2584","kind":"arxiv","version":1}},"canonical_sha256":"76df1de09b0013d95b72011872a4c2fb63a1e223d53e86642e72385347410829","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76df1de09b0013d95b72011872a4c2fb63a1e223d53e86642e72385347410829","first_computed_at":"2026-05-18T01:42:38.483158Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:38.483158Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HUgAH3Z4foTT7h2SFp9DJD9Tu2eYXozeF5VE7ztqvS7oDO+tcTi9fU8iZ6nxbxJiqt5kOvs9+xJSxWD/keqdAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:38.483724Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2584","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77444bd2587cae807001cfc6d5d2024a98f1769947e8122066650c98515933e5","sha256:2e1505bfb4daf632b6ce5aea78503032b54df8b7920a80fb2e5cfebcd33c84d4"],"state_sha256":"ff88bec40adaff2c6e41fd97643edb14a5335625f0fe3df14dda8640236cb35b"}