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It is probably the first SMBHB coalescence event observable in human history. Radio observations of J1430+2303 before and after coalescence will provide a unique diagnosis of the energetics and environment of the SMBHB.\n  Aims. We explore the radio emission from the galactic nucleus region that is closely related to the current X-ray and optical activities and helps to understand the state of black hole accretion and outflow before coalescence.\n  "},"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":"2205.03208","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-05-06T13:37:28Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"296c23939b0a20ae74eae45e5c74c52bd03f1f3b5f0eb2cb47ad941718fd9006","abstract_canon_sha256":"3ad1f84f6cb90f5f7b2e80495f0462696ae40aa118df16e3c738d2ba215cbcb7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:43:45.513106Z","signature_b64":"pK6pijXgmghoYgZDxDFM0e/AS9FCgtLieUhfY1LS5qiMrqRGvAglDl14F1lKVRSF+5We3QC4u2j/nK7SIJJYAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84e0191908f85ac5d61fd80181fd8551fb035eded88dbd5579f1a8e368b95221","last_reissued_at":"2026-07-05T04:43:45.512691Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:43:45.512691Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"VLBI imaging of the pre-coalescence SMBHB candidate SDSS J143016.05+230344.4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. 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We explore the radio emission from the galactic nucleus region that is closely related to the current X-ray and optical activities and helps to understand the state of black hole accretion and outflow before coalescence.\n  "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.03208","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/2205.03208/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2205.03208","created_at":"2026-07-05T04:43:45.512747+00:00"},{"alias_kind":"arxiv_version","alias_value":"2205.03208v1","created_at":"2026-07-05T04:43:45.512747+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.03208","created_at":"2026-07-05T04:43:45.512747+00:00"},{"alias_kind":"pith_short_12","alias_value":"QTQBSGII7BNM","created_at":"2026-07-05T04:43:45.512747+00:00"},{"alias_kind":"pith_short_16","alias_value":"QTQBSGII7BNMLVQ7","created_at":"2026-07-05T04:43:45.512747+00:00"},{"alias_kind":"pith_short_8","alias_value":"QTQBSGII","created_at":"2026-07-05T04:43:45.512747+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/QTQBSGII7BNMLVQ73AAYD7MFKH","json":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH.json","graph_json":"https://pith.science/api/pith-number/QTQBSGII7BNMLVQ73AAYD7MFKH/graph.json","events_json":"https://pith.science/api/pith-number/QTQBSGII7BNMLVQ73AAYD7MFKH/events.json","paper":"https://pith.science/paper/QTQBSGII"},"agent_actions":{"view_html":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH","download_json":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH.json","view_paper":"https://pith.science/paper/QTQBSGII","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2205.03208&json=true","fetch_graph":"https://pith.science/api/pith-number/QTQBSGII7BNMLVQ73AAYD7MFKH/graph.json","fetch_events":"https://pith.science/api/pith-number/QTQBSGII7BNMLVQ73AAYD7MFKH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH/action/storage_attestation","attest_author":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH/action/author_attestation","sign_citation":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH/action/citation_signature","submit_replication":"https://pith.science/pith/QTQBSGII7BNMLVQ73AAYD7MFKH/action/replication_record"}},"created_at":"2026-07-05T04:43:45.512747+00:00","updated_at":"2026-07-05T04:43:45.512747+00:00"}