{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:KGCOXNPS5NSJFLTTA73LBE53PK","short_pith_number":"pith:KGCOXNPS","canonical_record":{"source":{"id":"1103.4149","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-21T20:55:08Z","cross_cats_sorted":[],"title_canon_sha256":"57bbb2b74f9541e0a7b147f64485b79f72d965b9e7c831d88f39a3f7b44bc96a","abstract_canon_sha256":"cefe71c253b1b06947fb6979fe16321327c0d9ed9c1fd5d3264c234fc99ec037"},"schema_version":"1.0"},"canonical_sha256":"5184ebb5f2eb6492ae7307f6b093bb7aaa9da42b8747f6cbab23de5eac448f60","source":{"kind":"arxiv","id":"1103.4149","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.4149","created_at":"2026-05-18T02:02:48Z"},{"alias_kind":"arxiv_version","alias_value":"1103.4149v2","created_at":"2026-05-18T02:02:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.4149","created_at":"2026-05-18T02:02:48Z"},{"alias_kind":"pith_short_12","alias_value":"KGCOXNPS5NSJ","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"KGCOXNPS5NSJFLTT","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"KGCOXNPS","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:KGCOXNPS5NSJFLTTA73LBE53PK","target":"record","payload":{"canonical_record":{"source":{"id":"1103.4149","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-21T20:55:08Z","cross_cats_sorted":[],"title_canon_sha256":"57bbb2b74f9541e0a7b147f64485b79f72d965b9e7c831d88f39a3f7b44bc96a","abstract_canon_sha256":"cefe71c253b1b06947fb6979fe16321327c0d9ed9c1fd5d3264c234fc99ec037"},"schema_version":"1.0"},"canonical_sha256":"5184ebb5f2eb6492ae7307f6b093bb7aaa9da42b8747f6cbab23de5eac448f60","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:48.514715Z","signature_b64":"XTQDKcmZxJGxb8bUmI6y63QnhfE24hBmg6/fUkgcXJphEDGlCBCu9/GeclGKApKmUMiDL+WTWVNVIdv8MXhfDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5184ebb5f2eb6492ae7307f6b093bb7aaa9da42b8747f6cbab23de5eac448f60","last_reissued_at":"2026-05-18T02:02:48.513893Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:48.513893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.4149","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:02:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8zBISW9jaK4HjPnnLICwUCLuUV9puMmaAhO6j3Cr+6G1USobMJce8k2Wdor4TokjDfCzna9DTenU+KGgAWOtAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T13:41:07.827402Z"},"content_sha256":"509f3485992a964aff83e44da3cd93d953bd9c20618e0ae76758fb838ebaa7f6","schema_version":"1.0","event_id":"sha256:509f3485992a964aff83e44da3cd93d953bd9c20618e0ae76758fb838ebaa7f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:KGCOXNPS5NSJFLTTA73LBE53PK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Integrated Polarization of Sources at lambda ~1m and New Rotation Measure Ambiguities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Damon Farnsworth, Lawrence Rudnick, Shea Brown","submitted_at":"2011-03-21T20:55:08Z","abstract_excerpt":"We present an analysis of the polarization of compact radio sources from six pointings of the Westerbork Synthesis Radio Telescope (WSRT) at 350 MHz with 35% coverage in lambda^2. After correcting for the off-axis instrumental polarization with a simple analytical model, only a small number of 585 strong sources have significant polarizations at these wavelengths. The median depolarization ratio from 1.4 GHz for the strongest sources is <0.2, reinforcing the likelihood that radio galaxies are found in magnetized environments, even outside of rich clusters. Seven sources with significant 350 MH"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.4149","kind":"arxiv","version":2},"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":"2026-05-18T02:02:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rZ+UTa3/nHhUdWBMMAYYroT+YNm8IWk+fQtfzEQy2+h9vk6ts5+d3nFIiKDD3k1pBXvUAvmaLMkQp3x5fOBLAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T13:41:07.828066Z"},"content_sha256":"3c388de524a8eaa3ecd44cd21c6d5703a28246e6db915e2ac2f2ed8bd6e3316f","schema_version":"1.0","event_id":"sha256:3c388de524a8eaa3ecd44cd21c6d5703a28246e6db915e2ac2f2ed8bd6e3316f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KGCOXNPS5NSJFLTTA73LBE53PK/bundle.json","state_url":"https://pith.science/pith/KGCOXNPS5NSJFLTTA73LBE53PK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KGCOXNPS5NSJFLTTA73LBE53PK/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":"2026-06-04T13:41:07Z","links":{"resolver":"https://pith.science/pith/KGCOXNPS5NSJFLTTA73LBE53PK","bundle":"https://pith.science/pith/KGCOXNPS5NSJFLTTA73LBE53PK/bundle.json","state":"https://pith.science/pith/KGCOXNPS5NSJFLTTA73LBE53PK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KGCOXNPS5NSJFLTTA73LBE53PK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:KGCOXNPS5NSJFLTTA73LBE53PK","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":"cefe71c253b1b06947fb6979fe16321327c0d9ed9c1fd5d3264c234fc99ec037","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-21T20:55:08Z","title_canon_sha256":"57bbb2b74f9541e0a7b147f64485b79f72d965b9e7c831d88f39a3f7b44bc96a"},"schema_version":"1.0","source":{"id":"1103.4149","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.4149","created_at":"2026-05-18T02:02:48Z"},{"alias_kind":"arxiv_version","alias_value":"1103.4149v2","created_at":"2026-05-18T02:02:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.4149","created_at":"2026-05-18T02:02:48Z"},{"alias_kind":"pith_short_12","alias_value":"KGCOXNPS5NSJ","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"KGCOXNPS5NSJFLTT","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"KGCOXNPS","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:3c388de524a8eaa3ecd44cd21c6d5703a28246e6db915e2ac2f2ed8bd6e3316f","target":"graph","created_at":"2026-05-18T02:02:48Z","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 an analysis of the polarization of compact radio sources from six pointings of the Westerbork Synthesis Radio Telescope (WSRT) at 350 MHz with 35% coverage in lambda^2. After correcting for the off-axis instrumental polarization with a simple analytical model, only a small number of 585 strong sources have significant polarizations at these wavelengths. The median depolarization ratio from 1.4 GHz for the strongest sources is <0.2, reinforcing the likelihood that radio galaxies are found in magnetized environments, even outside of rich clusters. Seven sources with significant 350 MH","authors_text":"Damon Farnsworth, Lawrence Rudnick, Shea Brown","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-21T20:55:08Z","title":"Integrated Polarization of Sources at lambda ~1m and New Rotation Measure Ambiguities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.4149","kind":"arxiv","version":2},"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":"sha256:509f3485992a964aff83e44da3cd93d953bd9c20618e0ae76758fb838ebaa7f6","target":"record","created_at":"2026-05-18T02:02:48Z","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":"cefe71c253b1b06947fb6979fe16321327c0d9ed9c1fd5d3264c234fc99ec037","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-03-21T20:55:08Z","title_canon_sha256":"57bbb2b74f9541e0a7b147f64485b79f72d965b9e7c831d88f39a3f7b44bc96a"},"schema_version":"1.0","source":{"id":"1103.4149","kind":"arxiv","version":2}},"canonical_sha256":"5184ebb5f2eb6492ae7307f6b093bb7aaa9da42b8747f6cbab23de5eac448f60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5184ebb5f2eb6492ae7307f6b093bb7aaa9da42b8747f6cbab23de5eac448f60","first_computed_at":"2026-05-18T02:02:48.513893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:48.513893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XTQDKcmZxJGxb8bUmI6y63QnhfE24hBmg6/fUkgcXJphEDGlCBCu9/GeclGKApKmUMiDL+WTWVNVIdv8MXhfDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:48.514715Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.4149","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:509f3485992a964aff83e44da3cd93d953bd9c20618e0ae76758fb838ebaa7f6","sha256:3c388de524a8eaa3ecd44cd21c6d5703a28246e6db915e2ac2f2ed8bd6e3316f"],"state_sha256":"34efd24051456e87b0d0b9aba06aa497e91a75fbd336141a0ab225a2c7c4dbae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cqAEFlf+7RYUpqsKSytj4dOfsQACKrgE8MT8e4YGgRQ/QpDuy6ObmIVf/QKFx1cMVaNkAmqVjl58pa3+4TVFDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T13:41:07.831496Z","bundle_sha256":"6f4e328d91998d5614dc65db70f7febc289b60d41b92337b742ca32788c93481"}}