{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:2FKORG3AZ7QKGAVTVQCUQCTZ54","short_pith_number":"pith:2FKORG3A","canonical_record":{"source":{"id":"0805.1750","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-05-13T05:12:56Z","cross_cats_sorted":[],"title_canon_sha256":"c4685f34a1686fd41299bec5287a81e8b6a110b740c6ccdd1162502f053dbce8","abstract_canon_sha256":"ac1227a86511307875bccffb139186bcf231beb11bf4a4836e5a2f3073f82629"},"schema_version":"1.0"},"canonical_sha256":"d154e89b60cfe0a302b3ac05480a79ef1ea8de015b8c263d87769a8f19897d3d","source":{"kind":"arxiv","id":"0805.1750","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.1750","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"arxiv_version","alias_value":"0805.1750v2","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.1750","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"pith_short_12","alias_value":"2FKORG3AZ7QK","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"2FKORG3AZ7QKGAVT","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"2FKORG3A","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:2FKORG3AZ7QKGAVTVQCUQCTZ54","target":"record","payload":{"canonical_record":{"source":{"id":"0805.1750","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-05-13T05:12:56Z","cross_cats_sorted":[],"title_canon_sha256":"c4685f34a1686fd41299bec5287a81e8b6a110b740c6ccdd1162502f053dbce8","abstract_canon_sha256":"ac1227a86511307875bccffb139186bcf231beb11bf4a4836e5a2f3073f82629"},"schema_version":"1.0"},"canonical_sha256":"d154e89b60cfe0a302b3ac05480a79ef1ea8de015b8c263d87769a8f19897d3d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:33.655525Z","signature_b64":"E4f2x0edAjjjz3g1sDhbfR6tgf5eof9UGZeh6CuRpRVmQ7IAxe3SxlCbaDSPLv+8StNddhEb4RCtGRDYK9xYAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d154e89b60cfe0a302b3ac05480a79ef1ea8de015b8c263d87769a8f19897d3d","last_reissued_at":"2026-05-18T04:29:33.655141Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:33.655141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0805.1750","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":"2026-05-18T04:29:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ay5hR82UtiY+Zgzn1SP5C5ZvtTmejcHveTN8BwkAVUJzz/TvHLPs9j1VXjJUeyZBxQUHOJU2x4mmiUMc7pTTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:43:22.497473Z"},"content_sha256":"a38b434ea759104d3be6d144df8c82c170d22587831b036b3478f11174002591","schema_version":"1.0","event_id":"sha256:a38b434ea759104d3be6d144df8c82c170d22587831b036b3478f11174002591"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:2FKORG3AZ7QKGAVTVQCUQCTZ54","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral Energy Distribution of Radio Sources in Nearby Clusters of Galaxies: Implications for Sunyaev-Zel'dovich Effect Surveys","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2, (2) Pontificia Universidad Catolica de Chile, (3) Haverford, (4) Astrophysics, 5), (5) Swinburne University of Technology, (6) Miami, 7), (7) Institute for the Physics, Bruce Partridge (3), Cosmology Research Unit, J. C. Pober (3), Jonathan Klein (3), Joseph Coish (3), Kevin Huffenberger (6) ((1) Princeton, Khadija El Bouchefry (4), Mathematics of the Universe, Sarah Burke (3, The University of Tokyo), University of KwaZulu-Natal, Yen-Ting Lin (1","submitted_at":"2008-05-13T05:12:56Z","abstract_excerpt":"To explore the high frequency radio spectra of galaxies in clusters, we used NRAO's Very Large Array at four frequencies, 4.9-43 GHz, to observe 139 galaxies in low redshift (z<0.25), X-ray detected, clusters. The clusters were selected from the survey conducted by Ledlow & Owen, who provided redshifts and 1.4 GHz flux densities for all the radio sources. We find that more than half of the observed sources have steep microwave spectra as generally expected (alpha<-0.5, in the convention S \\propto nu^alpha). However, 60-70% of the unresolved or barely resolved sources have flat or inverted spec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.1750","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":"2026-05-18T04:29:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CGj/3MpiZ9as2GvsBhIb/FGcfMz36CRKgGa2LMtmhHWERRNHreE5RQ/bR9ofwgH89ONKcMMnWjOPRg/Bd5Q6Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:43:22.498183Z"},"content_sha256":"6109ff7ff7c2d2fcb82816bac7b54c4669cd1f9c3643287c50e0d4c5283958c3","schema_version":"1.0","event_id":"sha256:6109ff7ff7c2d2fcb82816bac7b54c4669cd1f9c3643287c50e0d4c5283958c3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54/bundle.json","state_url":"https://pith.science/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54/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":"2026-05-25T20:43:22Z","links":{"resolver":"https://pith.science/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54","bundle":"https://pith.science/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54/bundle.json","state":"https://pith.science/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2FKORG3AZ7QKGAVTVQCUQCTZ54/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:2FKORG3AZ7QKGAVTVQCUQCTZ54","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":"ac1227a86511307875bccffb139186bcf231beb11bf4a4836e5a2f3073f82629","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-05-13T05:12:56Z","title_canon_sha256":"c4685f34a1686fd41299bec5287a81e8b6a110b740c6ccdd1162502f053dbce8"},"schema_version":"1.0","source":{"id":"0805.1750","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.1750","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"arxiv_version","alias_value":"0805.1750v2","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.1750","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"pith_short_12","alias_value":"2FKORG3AZ7QK","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"2FKORG3AZ7QKGAVT","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"2FKORG3A","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:6109ff7ff7c2d2fcb82816bac7b54c4669cd1f9c3643287c50e0d4c5283958c3","target":"graph","created_at":"2026-05-18T04:29:33Z","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":"To explore the high frequency radio spectra of galaxies in clusters, we used NRAO's Very Large Array at four frequencies, 4.9-43 GHz, to observe 139 galaxies in low redshift (z<0.25), X-ray detected, clusters. The clusters were selected from the survey conducted by Ledlow & Owen, who provided redshifts and 1.4 GHz flux densities for all the radio sources. We find that more than half of the observed sources have steep microwave spectra as generally expected (alpha<-0.5, in the convention S \\propto nu^alpha). However, 60-70% of the unresolved or barely resolved sources have flat or inverted spec","authors_text":"2, (2) Pontificia Universidad Catolica de Chile, (3) Haverford, (4) Astrophysics, 5), (5) Swinburne University of Technology, (6) Miami, 7), (7) Institute for the Physics, Bruce Partridge (3), Cosmology Research Unit, J. C. Pober (3), Jonathan Klein (3), Joseph Coish (3), Kevin Huffenberger (6) ((1) Princeton, Khadija El Bouchefry (4), Mathematics of the Universe, Sarah Burke (3, The University of Tokyo), University of KwaZulu-Natal, Yen-Ting Lin (1","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-05-13T05:12:56Z","title":"Spectral Energy Distribution of Radio Sources in Nearby Clusters of Galaxies: Implications for Sunyaev-Zel'dovich Effect Surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.1750","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:a38b434ea759104d3be6d144df8c82c170d22587831b036b3478f11174002591","target":"record","created_at":"2026-05-18T04:29:33Z","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":"ac1227a86511307875bccffb139186bcf231beb11bf4a4836e5a2f3073f82629","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-05-13T05:12:56Z","title_canon_sha256":"c4685f34a1686fd41299bec5287a81e8b6a110b740c6ccdd1162502f053dbce8"},"schema_version":"1.0","source":{"id":"0805.1750","kind":"arxiv","version":2}},"canonical_sha256":"d154e89b60cfe0a302b3ac05480a79ef1ea8de015b8c263d87769a8f19897d3d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d154e89b60cfe0a302b3ac05480a79ef1ea8de015b8c263d87769a8f19897d3d","first_computed_at":"2026-05-18T04:29:33.655141Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:33.655141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E4f2x0edAjjjz3g1sDhbfR6tgf5eof9UGZeh6CuRpRVmQ7IAxe3SxlCbaDSPLv+8StNddhEb4RCtGRDYK9xYAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:33.655525Z","signed_message":"canonical_sha256_bytes"},"source_id":"0805.1750","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a38b434ea759104d3be6d144df8c82c170d22587831b036b3478f11174002591","sha256:6109ff7ff7c2d2fcb82816bac7b54c4669cd1f9c3643287c50e0d4c5283958c3"],"state_sha256":"70c5733d32a9fc5d6d4060c7d0bb3621393ee764faa5e66080ec9b7b50a5234a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xXa6LUVMLwjFNX8JTuVFKJXRYvz1A9hlfvh2hB89DZT2/4pTcdZUFZMkO53+7WMS5SRAFi5Gz394WVbc0FcoBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:43:22.502549Z","bundle_sha256":"2bbc05a8663bf89c657d5426317efab059cd576b996dd6b02cee7fa695d6ec48"}}