{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:6RID4DPEMW2AQKYWJFIFAJV37S","short_pith_number":"pith:6RID4DPE","canonical_record":{"source":{"id":"astro-ph/0201391","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-23T17:01:19Z","cross_cats_sorted":[],"title_canon_sha256":"155f7edad6b8713d71f632af0076e3887cdbe307ae254c6c797c7a87dfabf9f9","abstract_canon_sha256":"6861adff4fc3ca6a629d6d4155a180200169eadd40c4debbe4d009679fdf557e"},"schema_version":"1.0"},"canonical_sha256":"f4503e0de465b4082b1649505026bbfc8e84fd6c3c35d3591f9cd08abc4e6ddf","source":{"kind":"arxiv","id":"astro-ph/0201391","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201391","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201391v1","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201391","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"pith_short_12","alias_value":"6RID4DPEMW2A","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"pith_short_16","alias_value":"6RID4DPEMW2AQKYW","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"pith_short_8","alias_value":"6RID4DPE","created_at":"2026-07-04T16:29:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:6RID4DPEMW2AQKYWJFIFAJV37S","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0201391","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-23T17:01:19Z","cross_cats_sorted":[],"title_canon_sha256":"155f7edad6b8713d71f632af0076e3887cdbe307ae254c6c797c7a87dfabf9f9","abstract_canon_sha256":"6861adff4fc3ca6a629d6d4155a180200169eadd40c4debbe4d009679fdf557e"},"schema_version":"1.0"},"canonical_sha256":"f4503e0de465b4082b1649505026bbfc8e84fd6c3c35d3591f9cd08abc4e6ddf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:29:18.421705Z","signature_b64":"OxSHD6Oa7VOsF1hqguV1/uWs4ZzKHN7sJSlp/5bBQ4yVex3ZyMr9L4o/P4fu6PMLIGxJdqGLKXVNsYjZtjOuBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4503e0de465b4082b1649505026bbfc8e84fd6c3c35d3591f9cd08abc4e6ddf","last_reissued_at":"2026-07-04T16:29:18.421337Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:29:18.421337Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0201391","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":"2026-07-04T16:29:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0TIWQv+Bihhcf48or5faxKzvZRdRxOXs5JNQ+5oiCvq/CU4Wz6X0JT5HMF3e+OaAydWcxjRGSgpPUfPV45rPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T04:03:16.602391Z"},"content_sha256":"2a0a56af84ac41da043e7985c7108ad33717329e94413c8d152a6881b4a1f87d","schema_version":"1.0","event_id":"sha256:2a0a56af84ac41da043e7985c7108ad33717329e94413c8d152a6881b4a1f87d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:6RID4DPEMW2AQKYWJFIFAJV37S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The origin of the UV excess in powerful radio galaxies: spectroscopy and polarimetry of a complete sample of intermediate redshift radio galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Tadhunter, K. Wills, M. Hughes, M. Villar-Martin, R. Dickson, R. Morganti, T.G. Robinson","submitted_at":"2002-01-23T17:01:19Z","abstract_excerpt":"We present spectroscopic and polarimetric observations of a complete, optically unbiased sample of 2Jy radio galaxies at intermediate redshifts (0.15 < z < 0.7). These data -- which cover the nuclear regions of the target galaxies -- allow us to quantify for the first time the various components that contribute to the UV excess in the population of powerful, intermediate redshift radio galaxies. We find that, contrary to the results of previous surveys -- which have tended to be biased towards the most luminous and spectacular objects in any redshift range -- the contribution of scattered quas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201391","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0201391/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:29:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rDAlXKEs7/ki6+UYs3d9J0wMADv2GSNw7IQSQlgKdDkq0sx9NpFD+U9h5spbaeKjMSXzoC3KCz2GriyKYN1uAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T04:03:16.602764Z"},"content_sha256":"c8ee8b4995ff3a7c42e7a8957f2aebf6e77e525dd38be2bc280bf4978fbfc38c","schema_version":"1.0","event_id":"sha256:c8ee8b4995ff3a7c42e7a8957f2aebf6e77e525dd38be2bc280bf4978fbfc38c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6RID4DPEMW2AQKYWJFIFAJV37S/bundle.json","state_url":"https://pith.science/pith/6RID4DPEMW2AQKYWJFIFAJV37S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6RID4DPEMW2AQKYWJFIFAJV37S/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":"2026-08-05T04:03:16Z","links":{"resolver":"https://pith.science/pith/6RID4DPEMW2AQKYWJFIFAJV37S","bundle":"https://pith.science/pith/6RID4DPEMW2AQKYWJFIFAJV37S/bundle.json","state":"https://pith.science/pith/6RID4DPEMW2AQKYWJFIFAJV37S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6RID4DPEMW2AQKYWJFIFAJV37S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:6RID4DPEMW2AQKYWJFIFAJV37S","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":"6861adff4fc3ca6a629d6d4155a180200169eadd40c4debbe4d009679fdf557e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-23T17:01:19Z","title_canon_sha256":"155f7edad6b8713d71f632af0076e3887cdbe307ae254c6c797c7a87dfabf9f9"},"schema_version":"1.0","source":{"id":"astro-ph/0201391","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201391","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201391v1","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201391","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"pith_short_12","alias_value":"6RID4DPEMW2A","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"pith_short_16","alias_value":"6RID4DPEMW2AQKYW","created_at":"2026-07-04T16:29:18Z"},{"alias_kind":"pith_short_8","alias_value":"6RID4DPE","created_at":"2026-07-04T16:29:18Z"}],"graph_snapshots":[{"event_id":"sha256:c8ee8b4995ff3a7c42e7a8957f2aebf6e77e525dd38be2bc280bf4978fbfc38c","target":"graph","created_at":"2026-07-04T16:29:18Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0201391/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present spectroscopic and polarimetric observations of a complete, optically unbiased sample of 2Jy radio galaxies at intermediate redshifts (0.15 < z < 0.7). These data -- which cover the nuclear regions of the target galaxies -- allow us to quantify for the first time the various components that contribute to the UV excess in the population of powerful, intermediate redshift radio galaxies. We find that, contrary to the results of previous surveys -- which have tended to be biased towards the most luminous and spectacular objects in any redshift range -- the contribution of scattered quas","authors_text":"C. Tadhunter, K. Wills, M. Hughes, M. Villar-Martin, R. Dickson, R. Morganti, T.G. Robinson","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-01-23T17:01:19Z","title":"The origin of the UV excess in powerful radio galaxies: spectroscopy and polarimetry of a complete sample of intermediate redshift radio galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201391","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":"sha256:2a0a56af84ac41da043e7985c7108ad33717329e94413c8d152a6881b4a1f87d","target":"record","created_at":"2026-07-04T16:29:18Z","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":"6861adff4fc3ca6a629d6d4155a180200169eadd40c4debbe4d009679fdf557e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-23T17:01:19Z","title_canon_sha256":"155f7edad6b8713d71f632af0076e3887cdbe307ae254c6c797c7a87dfabf9f9"},"schema_version":"1.0","source":{"id":"astro-ph/0201391","kind":"arxiv","version":1}},"canonical_sha256":"f4503e0de465b4082b1649505026bbfc8e84fd6c3c35d3591f9cd08abc4e6ddf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f4503e0de465b4082b1649505026bbfc8e84fd6c3c35d3591f9cd08abc4e6ddf","first_computed_at":"2026-07-04T16:29:18.421337Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:29:18.421337Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OxSHD6Oa7VOsF1hqguV1/uWs4ZzKHN7sJSlp/5bBQ4yVex3ZyMr9L4o/P4fu6PMLIGxJdqGLKXVNsYjZtjOuBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:29:18.421705Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0201391","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a0a56af84ac41da043e7985c7108ad33717329e94413c8d152a6881b4a1f87d","sha256:c8ee8b4995ff3a7c42e7a8957f2aebf6e77e525dd38be2bc280bf4978fbfc38c"],"state_sha256":"a5664898d312dea8a8c89c24109ee53ba7587969c609a7eb7594aa171c603148"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HMnLIdrTVgEbjwwzAFGfHtrPg+7YuBchHqG7V9sckPtuPmOtaQUkp7sKhz0d1WWjeQdTI6zgUZG+pSEKYxUfCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T04:03:16.605140Z","bundle_sha256":"969b6aad9821f15528146852f61eed028b1f282d1646dd92d8a9d1ee703e0e65"}}