{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:U6VQ2MMSHSDO7Y73VO6PF3JWCL","short_pith_number":"pith:U6VQ2MMS","canonical_record":{"source":{"id":"0708.2605","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-20T08:44:10Z","cross_cats_sorted":[],"title_canon_sha256":"7279c8627e49f6f5acb6f3b7da69db1ebce3997212d63c5d41073b291079c666","abstract_canon_sha256":"9aad19ac4ee7d2884a6ca4b53cc4a9fd2c25f528e39963eb9cea29fd069a6cdc"},"schema_version":"1.0"},"canonical_sha256":"a7ab0d31923c86efe3fbabbcf2ed3612dd4285b056c6c1186ee481f139c12002","source":{"kind":"arxiv","id":"0708.2605","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.2605","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"arxiv_version","alias_value":"0708.2605v1","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.2605","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"pith_short_12","alias_value":"U6VQ2MMSHSDO","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"pith_short_16","alias_value":"U6VQ2MMSHSDO7Y73","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"pith_short_8","alias_value":"U6VQ2MMS","created_at":"2026-07-04T17:05:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:U6VQ2MMSHSDO7Y73VO6PF3JWCL","target":"record","payload":{"canonical_record":{"source":{"id":"0708.2605","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-20T08:44:10Z","cross_cats_sorted":[],"title_canon_sha256":"7279c8627e49f6f5acb6f3b7da69db1ebce3997212d63c5d41073b291079c666","abstract_canon_sha256":"9aad19ac4ee7d2884a6ca4b53cc4a9fd2c25f528e39963eb9cea29fd069a6cdc"},"schema_version":"1.0"},"canonical_sha256":"a7ab0d31923c86efe3fbabbcf2ed3612dd4285b056c6c1186ee481f139c12002","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:05:14.975783Z","signature_b64":"NxuPeovipB0wn8+fWUuI8Jo4TcVpfM1Us8vh5kZcdQx7kbMW8r74X8bfqM1Q9DtmWbg9Em2O3nZsg+x7FrbFCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7ab0d31923c86efe3fbabbcf2ed3612dd4285b056c6c1186ee481f139c12002","last_reissued_at":"2026-07-04T17:05:14.975357Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:05:14.975357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0708.2605","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":"2026-07-04T17:05:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dJy1JlAG3iRCkQPFBzkBEX/fRnWMIl9Z6GKz5luHf73vr0MaLhP5a4G0AKLT7EyB66vurFt7CyWLf7wkvGgvAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T18:46:39.440441Z"},"content_sha256":"680167b02ea50a686e57390175d2208ad677f5cc01e72d9c4d58b3a9cde2a106","schema_version":"1.0","event_id":"sha256:680167b02ea50a686e57390175d2208ad677f5cc01e72d9c4d58b3a9cde2a106"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:U6VQ2MMSHSDO7Y73VO6PF3JWCL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. H. C. Emonts, C. N. Tadhunter, J. Holt, J. Rodriguez, K. A. Wills, K. J. Inskip, R. M. Gonzalez Delgado, R. Morganti","submitted_at":"2007-08-20T08:44:10Z","abstract_excerpt":"Abridged. We present high-quality optical spectra for 12 powerful radio sources at low and intermediate redshifts (z < 0.7) that show evidence for a substantial UV excess. These data were taken using the WHT and VLT to determine the detailed properties of the young stellar populations (YSPs) in the host galaxies as part of a larger project to investigate evolutionary scenarios for the AGN host galaxies. The results of our spectral synthesis model fits to the spectra highlight the importance of taking into account AGN-related components (emission lines, nebular continuum, scattered light) and r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.2605","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/0708.2605/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":"2026-07-04T17:05:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9Qqb37gnxfXaYTcT7Z7IFQu1j9UEW1QIQ7Jj2ne28I+VitgZVIEv4lBv8SLqtuav0Z1DvpNNNBiWFNedls0iDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T18:46:39.440942Z"},"content_sha256":"5cee05661e1e5d7d85777c3ab22738210b07fd3a25d9cceab160b211493d5700","schema_version":"1.0","event_id":"sha256:5cee05661e1e5d7d85777c3ab22738210b07fd3a25d9cceab160b211493d5700"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL/bundle.json","state_url":"https://pith.science/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL/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":"2026-08-04T18:46:39Z","links":{"resolver":"https://pith.science/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL","bundle":"https://pith.science/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL/bundle.json","state":"https://pith.science/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U6VQ2MMSHSDO7Y73VO6PF3JWCL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:U6VQ2MMSHSDO7Y73VO6PF3JWCL","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":"9aad19ac4ee7d2884a6ca4b53cc4a9fd2c25f528e39963eb9cea29fd069a6cdc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-20T08:44:10Z","title_canon_sha256":"7279c8627e49f6f5acb6f3b7da69db1ebce3997212d63c5d41073b291079c666"},"schema_version":"1.0","source":{"id":"0708.2605","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.2605","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"arxiv_version","alias_value":"0708.2605v1","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.2605","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"pith_short_12","alias_value":"U6VQ2MMSHSDO","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"pith_short_16","alias_value":"U6VQ2MMSHSDO7Y73","created_at":"2026-07-04T17:05:14Z"},{"alias_kind":"pith_short_8","alias_value":"U6VQ2MMS","created_at":"2026-07-04T17:05:14Z"}],"graph_snapshots":[{"event_id":"sha256:5cee05661e1e5d7d85777c3ab22738210b07fd3a25d9cceab160b211493d5700","target":"graph","created_at":"2026-07-04T17:05:14Z","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/0708.2605/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Abridged. We present high-quality optical spectra for 12 powerful radio sources at low and intermediate redshifts (z < 0.7) that show evidence for a substantial UV excess. These data were taken using the WHT and VLT to determine the detailed properties of the young stellar populations (YSPs) in the host galaxies as part of a larger project to investigate evolutionary scenarios for the AGN host galaxies. The results of our spectral synthesis model fits to the spectra highlight the importance of taking into account AGN-related components (emission lines, nebular continuum, scattered light) and r","authors_text":"B. H. C. Emonts, C. N. Tadhunter, J. Holt, J. Rodriguez, K. A. Wills, K. J. Inskip, R. M. Gonzalez Delgado, R. Morganti","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-08-20T08:44:10Z","title":"The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.2605","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":"sha256:680167b02ea50a686e57390175d2208ad677f5cc01e72d9c4d58b3a9cde2a106","target":"record","created_at":"2026-07-04T17:05:14Z","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":"9aad19ac4ee7d2884a6ca4b53cc4a9fd2c25f528e39963eb9cea29fd069a6cdc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-20T08:44:10Z","title_canon_sha256":"7279c8627e49f6f5acb6f3b7da69db1ebce3997212d63c5d41073b291079c666"},"schema_version":"1.0","source":{"id":"0708.2605","kind":"arxiv","version":1}},"canonical_sha256":"a7ab0d31923c86efe3fbabbcf2ed3612dd4285b056c6c1186ee481f139c12002","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7ab0d31923c86efe3fbabbcf2ed3612dd4285b056c6c1186ee481f139c12002","first_computed_at":"2026-07-04T17:05:14.975357Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:05:14.975357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NxuPeovipB0wn8+fWUuI8Jo4TcVpfM1Us8vh5kZcdQx7kbMW8r74X8bfqM1Q9DtmWbg9Em2O3nZsg+x7FrbFCA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:05:14.975783Z","signed_message":"canonical_sha256_bytes"},"source_id":"0708.2605","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:680167b02ea50a686e57390175d2208ad677f5cc01e72d9c4d58b3a9cde2a106","sha256:5cee05661e1e5d7d85777c3ab22738210b07fd3a25d9cceab160b211493d5700"],"state_sha256":"2bd6694aa9fe8ab64b0acd3d6a22a285296d2ec439658ff662859eae60817032"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/AR42uq+BQpOoI4+LHbmpWUwZGHp5khDHXoIhNk9hxxyy3c8rlqQc7vroNcUdpwk1KCJOSDc8/5Y5ReQL8xdBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T18:46:39.446171Z","bundle_sha256":"f60b93bfe278fe50a9f99f165de46c433249074b72460fe37971f685c95e1f77"}}