{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:A6RGASCYJEO7EODBNYXRIRBWKN","short_pith_number":"pith:A6RGASCY","schema_version":"1.0","canonical_sha256":"07a2604858491df238616e2f144436535cece3e86a71912ece5a1add558147e3","source":{"kind":"arxiv","id":"0910.5821","version":1},"attestation_state":"computed","paper":{"title":"The faintest Seyfert radio cores revealed by VLBI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Francesca Panessa (IASF/INAF), Marcello Giroletti (INAF Istituto di Radioastronomia)","submitted_at":"2009-10-30T09:27:24Z","abstract_excerpt":"In this letter, we report on dual-frequency European VLBI Network (EVN) observations of the faintest and least luminous radio cores in Seyfert nuclei, going to sub-mJy flux densities and radio luminosities around 10^19 W/Hz. We detect radio emission from the nuclear region of four galaxies (NGC 4051, NGC 4388, NGC 4501, and NGC 5033), while one (NGC 5273) is undetected at the level of ~100 microJy. The detected compact nuclei have rather different radio properties: spectral indices range from steep (alpha>0.7) to slightly inverted (alpha=-0.1), brightness temperatures vary from T_B=10^5 K to l"},"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":"0910.5821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-30T09:27:24Z","cross_cats_sorted":[],"title_canon_sha256":"1fbe25fca0fd018e462ca2739973d0449cbd8f3df9f23f9a22357bae06f0194e","abstract_canon_sha256":"2c98af14fd52758f18cf59784ab9a2bfc2f4bf3b5864c969ac0014eee33b758f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:12.418167Z","signature_b64":"anz9LSWN3m7tIYFhJ6IYG8TuUhVYrt0FVydWxs6Ldihs3hm1tzNZ3iAdbTvzdO4+ttCReDD3fZA3bEOFSEHMDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"07a2604858491df238616e2f144436535cece3e86a71912ece5a1add558147e3","last_reissued_at":"2026-05-18T02:34:12.417773Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:12.417773Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The faintest Seyfert radio cores revealed by VLBI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Francesca Panessa (IASF/INAF), Marcello Giroletti (INAF Istituto di Radioastronomia)","submitted_at":"2009-10-30T09:27:24Z","abstract_excerpt":"In this letter, we report on dual-frequency European VLBI Network (EVN) observations of the faintest and least luminous radio cores in Seyfert nuclei, going to sub-mJy flux densities and radio luminosities around 10^19 W/Hz. We detect radio emission from the nuclear region of four galaxies (NGC 4051, NGC 4388, NGC 4501, and NGC 5033), while one (NGC 5273) is undetected at the level of ~100 microJy. The detected compact nuclei have rather different radio properties: spectral indices range from steep (alpha>0.7) to slightly inverted (alpha=-0.1), brightness temperatures vary from T_B=10^5 K to l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5821","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":"0910.5821","created_at":"2026-05-18T02:34:12.417835+00:00"},{"alias_kind":"arxiv_version","alias_value":"0910.5821v1","created_at":"2026-05-18T02:34:12.417835+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5821","created_at":"2026-05-18T02:34:12.417835+00:00"},{"alias_kind":"pith_short_12","alias_value":"A6RGASCYJEO7","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_16","alias_value":"A6RGASCYJEO7EODB","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_8","alias_value":"A6RGASCY","created_at":"2026-05-18T12:25:58.837520+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2606.28512","citing_title":"Dual AGN and Multiple SMBH Systems in the Era of SKAO","ref_index":70,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN","json":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN.json","graph_json":"https://pith.science/api/pith-number/A6RGASCYJEO7EODBNYXRIRBWKN/graph.json","events_json":"https://pith.science/api/pith-number/A6RGASCYJEO7EODBNYXRIRBWKN/events.json","paper":"https://pith.science/paper/A6RGASCY"},"agent_actions":{"view_html":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN","download_json":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN.json","view_paper":"https://pith.science/paper/A6RGASCY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0910.5821&json=true","fetch_graph":"https://pith.science/api/pith-number/A6RGASCYJEO7EODBNYXRIRBWKN/graph.json","fetch_events":"https://pith.science/api/pith-number/A6RGASCYJEO7EODBNYXRIRBWKN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN/action/storage_attestation","attest_author":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN/action/author_attestation","sign_citation":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN/action/citation_signature","submit_replication":"https://pith.science/pith/A6RGASCYJEO7EODBNYXRIRBWKN/action/replication_record"}},"created_at":"2026-05-18T02:34:12.417835+00:00","updated_at":"2026-05-18T02:34:12.417835+00:00"}