{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:KOCVBPOBUZ7VM32664UVLDPHB2","short_pith_number":"pith:KOCVBPOB","canonical_record":{"source":{"id":"0905.2660","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-16T07:27:11Z","cross_cats_sorted":[],"title_canon_sha256":"26b3b55973068f71f7195c38f90669c7d338c37595be5e60d35aac67263ce73f","abstract_canon_sha256":"1dd09a80eb840916583b2a259fdc748164ae59fa3470e725eea98370be4d360e"},"schema_version":"1.0"},"canonical_sha256":"538550bdc1a67f566f5ef729558de70ebe10f8b3143c358bc3957304ac203ac2","source":{"kind":"arxiv","id":"0905.2660","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.2660","created_at":"2026-05-18T02:13:39Z"},{"alias_kind":"arxiv_version","alias_value":"0905.2660v1","created_at":"2026-05-18T02:13:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.2660","created_at":"2026-05-18T02:13:39Z"},{"alias_kind":"pith_short_12","alias_value":"KOCVBPOBUZ7V","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"KOCVBPOBUZ7VM326","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"KOCVBPOB","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:KOCVBPOBUZ7VM32664UVLDPHB2","target":"record","payload":{"canonical_record":{"source":{"id":"0905.2660","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-16T07:27:11Z","cross_cats_sorted":[],"title_canon_sha256":"26b3b55973068f71f7195c38f90669c7d338c37595be5e60d35aac67263ce73f","abstract_canon_sha256":"1dd09a80eb840916583b2a259fdc748164ae59fa3470e725eea98370be4d360e"},"schema_version":"1.0"},"canonical_sha256":"538550bdc1a67f566f5ef729558de70ebe10f8b3143c358bc3957304ac203ac2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:39.135522Z","signature_b64":"6UXotIs2trFc5dYodBUZtuxmxmCFLdDVn5o7PrBo6jnQAcicoNDrgvnRvBj0woO7W8COypumSBMPMlVUV7ptAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"538550bdc1a67f566f5ef729558de70ebe10f8b3143c358bc3957304ac203ac2","last_reissued_at":"2026-05-18T02:13:39.135076Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:39.135076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.2660","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:13:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RI9czitDxRLZbwSZ2u10yhpnsGxW0CvwipArlFGb3WxWoNovE/QrOHw919fIoK1y7+KZOn/YWyUMjMzjxkSUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T20:12:19.664808Z"},"content_sha256":"91a2025ca3c84e0ad6ed121030cdee6ddc2fd3c91f7f93b2856df52bcfaa0b37","schema_version":"1.0","event_id":"sha256:91a2025ca3c84e0ad6ed121030cdee6ddc2fd3c91f7f93b2856df52bcfaa0b37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:KOCVBPOBUZ7VM32664UVLDPHB2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multi-frequency measurements of the NVSS foreground sources in the Cosmic Background Imager fields. I. Data release","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. C. S. Readhead, A. Kraus, A. Witzel, E. Angelakis, J. A. Zensus, R. Bustos, T. J. Pearson, T. P. Krichbaum","submitted_at":"2009-05-16T07:27:11Z","abstract_excerpt":"We present the results of the flux density measurements at 4.85 GHz and 10.45 GHz of a sample of 5998 NVSS radio sources with the Effelsberg 100 m telescope. The initial motivation was the need to identify the NVSS radio sources that could potentially contribute significant contaminating flux in the frequency range at which the Cosmic Background Imager experiment operated. An efficient way to achieve this challenging goal has been to compute the high frequency flux density of those sources by extrapolating their radio spectrum. This is determined by the three-point spectral index measured on t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.2660","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":""},"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":"2026-05-18T02:13:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4NJpBins9Kjn4Vf8M5n0yo08EMSrTAJMxoZrrE+irWbNYA/4O1gY+paPjh4UrKWBW+PWE5Blgk/PgQ5YIzfrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T20:12:19.665432Z"},"content_sha256":"5ddd29b78f9d4ad8dd87f019c431809a547589517eae3228ccf2bdaaccc97ed4","schema_version":"1.0","event_id":"sha256:5ddd29b78f9d4ad8dd87f019c431809a547589517eae3228ccf2bdaaccc97ed4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KOCVBPOBUZ7VM32664UVLDPHB2/bundle.json","state_url":"https://pith.science/pith/KOCVBPOBUZ7VM32664UVLDPHB2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KOCVBPOBUZ7VM32664UVLDPHB2/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":"2026-05-31T20:12:19Z","links":{"resolver":"https://pith.science/pith/KOCVBPOBUZ7VM32664UVLDPHB2","bundle":"https://pith.science/pith/KOCVBPOBUZ7VM32664UVLDPHB2/bundle.json","state":"https://pith.science/pith/KOCVBPOBUZ7VM32664UVLDPHB2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KOCVBPOBUZ7VM32664UVLDPHB2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:KOCVBPOBUZ7VM32664UVLDPHB2","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":"1dd09a80eb840916583b2a259fdc748164ae59fa3470e725eea98370be4d360e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-16T07:27:11Z","title_canon_sha256":"26b3b55973068f71f7195c38f90669c7d338c37595be5e60d35aac67263ce73f"},"schema_version":"1.0","source":{"id":"0905.2660","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.2660","created_at":"2026-05-18T02:13:39Z"},{"alias_kind":"arxiv_version","alias_value":"0905.2660v1","created_at":"2026-05-18T02:13:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.2660","created_at":"2026-05-18T02:13:39Z"},{"alias_kind":"pith_short_12","alias_value":"KOCVBPOBUZ7V","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"KOCVBPOBUZ7VM326","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"KOCVBPOB","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:5ddd29b78f9d4ad8dd87f019c431809a547589517eae3228ccf2bdaaccc97ed4","target":"graph","created_at":"2026-05-18T02:13:39Z","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 results of the flux density measurements at 4.85 GHz and 10.45 GHz of a sample of 5998 NVSS radio sources with the Effelsberg 100 m telescope. The initial motivation was the need to identify the NVSS radio sources that could potentially contribute significant contaminating flux in the frequency range at which the Cosmic Background Imager experiment operated. An efficient way to achieve this challenging goal has been to compute the high frequency flux density of those sources by extrapolating their radio spectrum. This is determined by the three-point spectral index measured on t","authors_text":"A. C. S. Readhead, A. Kraus, A. Witzel, E. Angelakis, J. A. Zensus, R. Bustos, T. J. Pearson, T. P. Krichbaum","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-16T07:27:11Z","title":"Multi-frequency measurements of the NVSS foreground sources in the Cosmic Background Imager fields. I. Data release"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.2660","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":"sha256:91a2025ca3c84e0ad6ed121030cdee6ddc2fd3c91f7f93b2856df52bcfaa0b37","target":"record","created_at":"2026-05-18T02:13:39Z","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":"1dd09a80eb840916583b2a259fdc748164ae59fa3470e725eea98370be4d360e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-16T07:27:11Z","title_canon_sha256":"26b3b55973068f71f7195c38f90669c7d338c37595be5e60d35aac67263ce73f"},"schema_version":"1.0","source":{"id":"0905.2660","kind":"arxiv","version":1}},"canonical_sha256":"538550bdc1a67f566f5ef729558de70ebe10f8b3143c358bc3957304ac203ac2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"538550bdc1a67f566f5ef729558de70ebe10f8b3143c358bc3957304ac203ac2","first_computed_at":"2026-05-18T02:13:39.135076Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:39.135076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6UXotIs2trFc5dYodBUZtuxmxmCFLdDVn5o7PrBo6jnQAcicoNDrgvnRvBj0woO7W8COypumSBMPMlVUV7ptAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:39.135522Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.2660","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:91a2025ca3c84e0ad6ed121030cdee6ddc2fd3c91f7f93b2856df52bcfaa0b37","sha256:5ddd29b78f9d4ad8dd87f019c431809a547589517eae3228ccf2bdaaccc97ed4"],"state_sha256":"6a8abc7c1063f80d0d89fdc122c1c957d570bc90fb4fae6a7ef8dd9dab3c0dcc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2EE/DwjT7gHGNsaCJiO6X8lp1WQqn1dBioxyImMUWmZxjajkg621LBHQkUP3zBcwWU08jCIMDEj44jBR8A5VDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T20:12:19.668959Z","bundle_sha256":"b532254ef1499f7bfd9c828eb3fd0ae62780db9a6e67638b88e4d249e6ab0235"}}