{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:KPW5NCQXTPWTKXGDS3L4KZZAGB","short_pith_number":"pith:KPW5NCQX","schema_version":"1.0","canonical_sha256":"53edd68a179bed355cc396d7c5672030621d961006f0ae112a5ee2225c9659bc","source":{"kind":"arxiv","id":"2509.04559","version":1},"attestation_state":"computed","paper":{"title":"X-ray investigation of possible super-Eddington accretion in a radio-loud quasar at $z=6.13$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. Caccianiga, A. Lupi, A. Moretti, B. Arsioli, C. Reynolds, C. Vignali, D. Dallacasa, E. Lambrides, F. Haardt, F. Pacucci, F. Rigamonti, F. Tavecchio, I. Matute, J. Afonso, James K. Leung, J. W. Broderick, L. Ighina, N. Seymour, P. Severgnini, R. Della Ceca, S. Belladitta, T. Connor","submitted_at":"2025-09-04T18:00:01Z","abstract_excerpt":"We present radio and X-ray observations of the recently discovered $z=6.13$ radio-powerful quasar RACS J032021.44$-$352104.1 using uGMRT, ATCA, LBA, and Chandra. The observed radio properties are in line with what is typically observed in high-$z$ radio quasars ($\\alpha_{\\rm r}=0.72\\pm 0.02$ and L$_{\\rm 1.4GHz}=5.8 \\pm 0.9 \\times 10^{26}$ W Hz$^{-1}$). Despite the relatively low X-ray flux observed $F_{\\rm 0.5-7.0 keV}=2.3\\pm0.5 \\times 10^{-14}$ erg sec$^{-1}$ cm$^{-2}$, the intrinsic luminosity in the 2-10 keV rest frame is markedly high, $L_{\\rm 2-10 keV}=1.8^{+1.1}_{-0.7} \\times 10^{46}$ er"},"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":"2509.04559","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-09-04T18:00:01Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"079118703fa1a16e28172841da28712b29f3478897aa4dd4753708eebd1a8e77","abstract_canon_sha256":"698d9784dc755a60372915b4d4cb95ffa4c1057f2a199d821ac0365e40aba5f7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:05:25.308512Z","signature_b64":"l09xuEpEH6bUGBsPx/lVvXfj8zpNs/NKeuPDBTOcAdnH4pMYVY5lJtpKMPx1UktqN+jVnhHeeyFTjQWebMFqAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"53edd68a179bed355cc396d7c5672030621d961006f0ae112a5ee2225c9659bc","last_reissued_at":"2026-07-05T12:05:25.307950Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:05:25.307950Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"X-ray investigation of possible super-Eddington accretion in a radio-loud quasar at $z=6.13$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. Caccianiga, A. Lupi, A. Moretti, B. Arsioli, C. Reynolds, C. Vignali, D. Dallacasa, E. Lambrides, F. Haardt, F. Pacucci, F. Rigamonti, F. Tavecchio, I. Matute, J. Afonso, James K. Leung, J. W. Broderick, L. Ighina, N. Seymour, P. Severgnini, R. Della Ceca, S. Belladitta, T. Connor","submitted_at":"2025-09-04T18:00:01Z","abstract_excerpt":"We present radio and X-ray observations of the recently discovered $z=6.13$ radio-powerful quasar RACS J032021.44$-$352104.1 using uGMRT, ATCA, LBA, and Chandra. The observed radio properties are in line with what is typically observed in high-$z$ radio quasars ($\\alpha_{\\rm r}=0.72\\pm 0.02$ and L$_{\\rm 1.4GHz}=5.8 \\pm 0.9 \\times 10^{26}$ W Hz$^{-1}$). Despite the relatively low X-ray flux observed $F_{\\rm 0.5-7.0 keV}=2.3\\pm0.5 \\times 10^{-14}$ erg sec$^{-1}$ cm$^{-2}$, the intrinsic luminosity in the 2-10 keV rest frame is markedly high, $L_{\\rm 2-10 keV}=1.8^{+1.1}_{-0.7} \\times 10^{46}$ er"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.04559","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/2509.04559/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":"2509.04559","created_at":"2026-07-05T12:05:25.308022+00:00"},{"alias_kind":"arxiv_version","alias_value":"2509.04559v1","created_at":"2026-07-05T12:05:25.308022+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.04559","created_at":"2026-07-05T12:05:25.308022+00:00"},{"alias_kind":"pith_short_12","alias_value":"KPW5NCQXTPWT","created_at":"2026-07-05T12:05:25.308022+00:00"},{"alias_kind":"pith_short_16","alias_value":"KPW5NCQXTPWTKXGD","created_at":"2026-07-05T12:05:25.308022+00:00"},{"alias_kind":"pith_short_8","alias_value":"KPW5NCQX","created_at":"2026-07-05T12:05:25.308022+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/KPW5NCQXTPWTKXGDS3L4KZZAGB","json":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB.json","graph_json":"https://pith.science/api/pith-number/KPW5NCQXTPWTKXGDS3L4KZZAGB/graph.json","events_json":"https://pith.science/api/pith-number/KPW5NCQXTPWTKXGDS3L4KZZAGB/events.json","paper":"https://pith.science/paper/KPW5NCQX"},"agent_actions":{"view_html":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB","download_json":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB.json","view_paper":"https://pith.science/paper/KPW5NCQX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2509.04559&json=true","fetch_graph":"https://pith.science/api/pith-number/KPW5NCQXTPWTKXGDS3L4KZZAGB/graph.json","fetch_events":"https://pith.science/api/pith-number/KPW5NCQXTPWTKXGDS3L4KZZAGB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB/action/storage_attestation","attest_author":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB/action/author_attestation","sign_citation":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB/action/citation_signature","submit_replication":"https://pith.science/pith/KPW5NCQXTPWTKXGDS3L4KZZAGB/action/replication_record"}},"created_at":"2026-07-05T12:05:25.308022+00:00","updated_at":"2026-07-05T12:05:25.308022+00:00"}