{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:DGVPEG4OUCQW2DZUS26CXU4HVW","short_pith_number":"pith:DGVPEG4O","schema_version":"1.0","canonical_sha256":"19aaf21b8ea0a16d0f3496bc2bd387ad90338c31476989695c09a9e8a34ea286","source":{"kind":"arxiv","id":"1012.2992","version":1},"attestation_state":"computed","paper":{"title":"4C 02.27: what is inside a double-double radio quasar?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"S. Frey (FOMI SGO), Z. Paragi (JIVE)","submitted_at":"2010-12-14T10:58:10Z","abstract_excerpt":"Recently Jamrozy et al. (2009) identified 4C 02.27 (J0935+0204) as the first possible example of a double-double radio source which is optically identified with a quasar (i.e. not a galaxy), at the redshift of z=0.649. The overall projected angular size of the radio source reaches about 1.5', with a prominent \"core\" component in the centre. The two opposite pairs of radio lobes might indicate two periods of episodic activity. We report on our short exploratory 1.6-GHz Very Long Baseline Interferometry (VLBI) observations of the innermost radio structure of the quasar, conducted with the electr"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1012.2992","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-14T10:58:10Z","cross_cats_sorted":[],"title_canon_sha256":"14732fcef8accdaee648adff61ac421de2ff04782cb44e25df5b4e5c8305fade","abstract_canon_sha256":"8e04da2195b8232db5f0e09738d25bfc343ea499e06f327dce3241692a47db64"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:33:18.899463Z","signature_b64":"MaIpYuU37IG+6CQQOoM1w9sGVf9v8zbU3JigM3YQ01mVrWKZpLb2FLyzCxuaodEefkleqdRjZYCI/kBYWTZxCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19aaf21b8ea0a16d0f3496bc2bd387ad90338c31476989695c09a9e8a34ea286","last_reissued_at":"2026-05-18T04:33:18.898881Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:33:18.898881Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"4C 02.27: what is inside a double-double radio quasar?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"S. Frey (FOMI SGO), Z. Paragi (JIVE)","submitted_at":"2010-12-14T10:58:10Z","abstract_excerpt":"Recently Jamrozy et al. (2009) identified 4C 02.27 (J0935+0204) as the first possible example of a double-double radio source which is optically identified with a quasar (i.e. not a galaxy), at the redshift of z=0.649. The overall projected angular size of the radio source reaches about 1.5', with a prominent \"core\" component in the centre. The two opposite pairs of radio lobes might indicate two periods of episodic activity. We report on our short exploratory 1.6-GHz Very Long Baseline Interferometry (VLBI) observations of the innermost radio structure of the quasar, conducted with the electr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.2992","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1012.2992","created_at":"2026-05-18T04:33:18.898966+00:00"},{"alias_kind":"arxiv_version","alias_value":"1012.2992v1","created_at":"2026-05-18T04:33:18.898966+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.2992","created_at":"2026-05-18T04:33:18.898966+00:00"},{"alias_kind":"pith_short_12","alias_value":"DGVPEG4OUCQW","created_at":"2026-05-18T12:26:06.534383+00:00"},{"alias_kind":"pith_short_16","alias_value":"DGVPEG4OUCQW2DZU","created_at":"2026-05-18T12:26:06.534383+00:00"},{"alias_kind":"pith_short_8","alias_value":"DGVPEG4O","created_at":"2026-05-18T12:26:06.534383+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW","json":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW.json","graph_json":"https://pith.science/api/pith-number/DGVPEG4OUCQW2DZUS26CXU4HVW/graph.json","events_json":"https://pith.science/api/pith-number/DGVPEG4OUCQW2DZUS26CXU4HVW/events.json","paper":"https://pith.science/paper/DGVPEG4O"},"agent_actions":{"view_html":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW","download_json":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW.json","view_paper":"https://pith.science/paper/DGVPEG4O","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1012.2992&json=true","fetch_graph":"https://pith.science/api/pith-number/DGVPEG4OUCQW2DZUS26CXU4HVW/graph.json","fetch_events":"https://pith.science/api/pith-number/DGVPEG4OUCQW2DZUS26CXU4HVW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW/action/storage_attestation","attest_author":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW/action/author_attestation","sign_citation":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW/action/citation_signature","submit_replication":"https://pith.science/pith/DGVPEG4OUCQW2DZUS26CXU4HVW/action/replication_record"}},"created_at":"2026-05-18T04:33:18.898966+00:00","updated_at":"2026-05-18T04:33:18.898966+00:00"}