{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:NZDVZ2QN3S2LOK6RIZSZSJFV42","short_pith_number":"pith:NZDVZ2QN","schema_version":"1.0","canonical_sha256":"6e475cea0ddcb4b72bd146659924b5e69f6c84773fc18843cbdbf5e6a9a23ab4","source":{"kind":"arxiv","id":"2110.05514","version":1},"attestation_state":"computed","paper":{"title":"Radio and X-ray observations of the luminous Fast Blue Optical Transient AT2020xnd","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Assaf Horesh, Brian D. Metzger, Brian S. Mason, Charles Romero, Craig L. Sarazin, Daniel Brethauer, Dan Milisavljevic, David Matthews, Deanne Coppejans, E. Berger, Enrico Ramirez-Ruiz, Giulia Migliori, Itai Sfaradi, Joe S. Bright, Jonathan Sievers, Kate D. Alexander, Lauren Rhodes, Lindsay DeMarchi, Mark H. Wieringa, Mark J. Devlin, Michael Bietenholz, Raffaella Margutti, Ryan Chornock, Sara E. Motta, Simon R. Dicker, Tanmoy Laskar, Tony Mroczkowski, W. V. Jacobson-Gal\\'an","submitted_at":"2021-10-11T18:00:15Z","abstract_excerpt":"We present deep X-ray and radio observations of the Fast Blue Optical Transient (FBOT) AT2020xnd/ZTF20acigmel at $z=0.2433$ from $13$d to $269$d after explosion. AT2020xnd belongs to the category of optically luminous FBOTs with similarities to the archetypal event AT2018cow. AT2020xnd shows luminous radio emission reaching $L_{\\nu}\\approx8\\times10^{29}$ergs$^{-1}$Hz$^{-1}$ at 20GHz and $75$d post explosion, accompanied by luminous and rapidly fading soft X-ray emission peaking at $L_{X}\\approx6\\times10^{42}$ergs$^{-1}$. Interpreting the radio emission in the context of synchrotron radiation f"},"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":"2110.05514","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-10-11T18:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"a3801e2f609a455ed9fceb84b8e0186e0e009819a1845c65af86f3fd42f9200b","abstract_canon_sha256":"8d115d181f484d10355a8ad884717c507d9277e47012645a6bb7c61c3007c48a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:59:17.886267Z","signature_b64":"AGTInE3Rs4dJeaFfPLtT/WWAtH7DiQnu/2spyJx3Kyo13KJucMoB1T5FsSapzKt5dDRF2ETx+1Stn9PLVobfAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6e475cea0ddcb4b72bd146659924b5e69f6c84773fc18843cbdbf5e6a9a23ab4","last_reissued_at":"2026-07-05T03:59:17.885783Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:59:17.885783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Radio and X-ray observations of the luminous Fast Blue Optical Transient AT2020xnd","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Assaf Horesh, Brian D. Metzger, Brian S. Mason, Charles Romero, Craig L. Sarazin, Daniel Brethauer, Dan Milisavljevic, David Matthews, Deanne Coppejans, E. Berger, Enrico Ramirez-Ruiz, Giulia Migliori, Itai Sfaradi, Joe S. Bright, Jonathan Sievers, Kate D. Alexander, Lauren Rhodes, Lindsay DeMarchi, Mark H. Wieringa, Mark J. Devlin, Michael Bietenholz, Raffaella Margutti, Ryan Chornock, Sara E. Motta, Simon R. Dicker, Tanmoy Laskar, Tony Mroczkowski, W. V. Jacobson-Gal\\'an","submitted_at":"2021-10-11T18:00:15Z","abstract_excerpt":"We present deep X-ray and radio observations of the Fast Blue Optical Transient (FBOT) AT2020xnd/ZTF20acigmel at $z=0.2433$ from $13$d to $269$d after explosion. AT2020xnd belongs to the category of optically luminous FBOTs with similarities to the archetypal event AT2018cow. AT2020xnd shows luminous radio emission reaching $L_{\\nu}\\approx8\\times10^{29}$ergs$^{-1}$Hz$^{-1}$ at 20GHz and $75$d post explosion, accompanied by luminous and rapidly fading soft X-ray emission peaking at $L_{X}\\approx6\\times10^{42}$ergs$^{-1}$. Interpreting the radio emission in the context of synchrotron radiation f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.05514","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/2110.05514/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":"2110.05514","created_at":"2026-07-05T03:59:17.885854+00:00"},{"alias_kind":"arxiv_version","alias_value":"2110.05514v1","created_at":"2026-07-05T03:59:17.885854+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.05514","created_at":"2026-07-05T03:59:17.885854+00:00"},{"alias_kind":"pith_short_12","alias_value":"NZDVZ2QN3S2L","created_at":"2026-07-05T03:59:17.885854+00:00"},{"alias_kind":"pith_short_16","alias_value":"NZDVZ2QN3S2LOK6R","created_at":"2026-07-05T03:59:17.885854+00:00"},{"alias_kind":"pith_short_8","alias_value":"NZDVZ2QN","created_at":"2026-07-05T03:59:17.885854+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.11545","citing_title":"AT2019ijn: a fast-rising, slow-decaying blue optical transient with exceptionally bright radio emission","ref_index":25,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42","json":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42.json","graph_json":"https://pith.science/api/pith-number/NZDVZ2QN3S2LOK6RIZSZSJFV42/graph.json","events_json":"https://pith.science/api/pith-number/NZDVZ2QN3S2LOK6RIZSZSJFV42/events.json","paper":"https://pith.science/paper/NZDVZ2QN"},"agent_actions":{"view_html":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42","download_json":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42.json","view_paper":"https://pith.science/paper/NZDVZ2QN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2110.05514&json=true","fetch_graph":"https://pith.science/api/pith-number/NZDVZ2QN3S2LOK6RIZSZSJFV42/graph.json","fetch_events":"https://pith.science/api/pith-number/NZDVZ2QN3S2LOK6RIZSZSJFV42/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42/action/storage_attestation","attest_author":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42/action/author_attestation","sign_citation":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42/action/citation_signature","submit_replication":"https://pith.science/pith/NZDVZ2QN3S2LOK6RIZSZSJFV42/action/replication_record"}},"created_at":"2026-07-05T03:59:17.885854+00:00","updated_at":"2026-07-05T03:59:17.885854+00:00"}