{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:NWM6G62RUNKXHPRY5BS53F7ZBT","short_pith_number":"pith:NWM6G62R","schema_version":"1.0","canonical_sha256":"6d99e37b51a35573be38e865dd97f90cc1a5072ef3febf2d49bdf5ec105f2d3d","source":{"kind":"arxiv","id":"2502.19469","version":1},"attestation_state":"computed","paper":{"title":"Evidence for an Instability-Induced Binary Merger in the Double-Peaked, Helium-Rich Type IIn Supernova 2023zkd","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. E. Nugent, A. Gagliano, A. Rest, C. Angus, C.-C. Lin, C. D. Kilpatrick, C. Gall, C. L. Ransome, C. McCully, D. A. Coulter, D. A. Howell, D. Farias, D. Hiramatsu, D. O. Jones, D. Tsuna, E. A. Magnier, E. P. Gonzalez, G. Narayan, G. Terreran, H. Gao, J. Farah, J. R. Fairlamb, K. A. Bostroem, K. Auchettl, K. C. Chambers, K. C. Patra, K. W. Davis, K. W. Smith, M. E. Huber, M. E. MacLeod, M. Newsome, P. D. Aleo, P. Minguez, Q. Wang, R. J. Foley, R. J. Wainscoat, S. Gomez, S. K. Yadavalli, S. Rest, S. Smartt, T. de Boer, T. Matsumoto, V. A. Villar, Y. Dong, Y. Zenati (The Young Supernova Experiment)","submitted_at":"2025-02-26T19:00:00Z","abstract_excerpt":"We present ultraviolet to infrared observations of the extraordinary Type IIn supernova 2023zkd (SN 2023zkd). Photometrically, it exhibits persistent and luminous precursor emission spanning $\\sim$4 years preceding discovery ($M_r\\approx-15$ mag, 1,500~days in the observer frame), followed by a secondary stage of gradual brightening in its final year. Post-discovery, it exhibits two photometric peaks of comparable brightness ($M_r\\lesssim-18.7$ mag and $M_r\\approx-18.4$ mag, respectively) separated by 240 days. Spectroscopically, SN 2023zkd exhibits highly asymmetric and multi-component Balmer"},"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":"2502.19469","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-26T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"b78cef601a5955c1ce95b7f547777bb8d9c43228e060cc21715bb49618998f3e","abstract_canon_sha256":"71b17bcd020aa9788e2be1987549999258a638d4e724b0ab5fb89e256c3001cc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:20:47.289948Z","signature_b64":"C4V9B6oQAGZSyBN3x9Gxd7gEXnjManjhfb8r45BoGsuN3AGzaaM/A4BHQkTm4gKQIaACqM2oy4V1UiJ8lpS6Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d99e37b51a35573be38e865dd97f90cc1a5072ef3febf2d49bdf5ec105f2d3d","last_reissued_at":"2026-07-05T10:20:47.289448Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:20:47.289448Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence for an Instability-Induced Binary Merger in the Double-Peaked, Helium-Rich Type IIn Supernova 2023zkd","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. E. Nugent, A. Gagliano, A. Rest, C. Angus, C.-C. Lin, C. D. Kilpatrick, C. Gall, C. L. Ransome, C. McCully, D. A. Coulter, D. A. Howell, D. Farias, D. Hiramatsu, D. O. Jones, D. Tsuna, E. A. Magnier, E. P. Gonzalez, G. Narayan, G. Terreran, H. Gao, J. Farah, J. R. Fairlamb, K. A. Bostroem, K. Auchettl, K. C. Chambers, K. C. Patra, K. W. Davis, K. W. Smith, M. E. Huber, M. E. MacLeod, M. Newsome, P. D. Aleo, P. Minguez, Q. Wang, R. J. Foley, R. J. Wainscoat, S. Gomez, S. K. Yadavalli, S. Rest, S. Smartt, T. de Boer, T. Matsumoto, V. A. Villar, Y. Dong, Y. Zenati (The Young Supernova Experiment)","submitted_at":"2025-02-26T19:00:00Z","abstract_excerpt":"We present ultraviolet to infrared observations of the extraordinary Type IIn supernova 2023zkd (SN 2023zkd). Photometrically, it exhibits persistent and luminous precursor emission spanning $\\sim$4 years preceding discovery ($M_r\\approx-15$ mag, 1,500~days in the observer frame), followed by a secondary stage of gradual brightening in its final year. Post-discovery, it exhibits two photometric peaks of comparable brightness ($M_r\\lesssim-18.7$ mag and $M_r\\approx-18.4$ mag, respectively) separated by 240 days. Spectroscopically, SN 2023zkd exhibits highly asymmetric and multi-component Balmer"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.19469","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/2502.19469/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":"2502.19469","created_at":"2026-07-05T10:20:47.289511+00:00"},{"alias_kind":"arxiv_version","alias_value":"2502.19469v1","created_at":"2026-07-05T10:20:47.289511+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.19469","created_at":"2026-07-05T10:20:47.289511+00:00"},{"alias_kind":"pith_short_12","alias_value":"NWM6G62RUNKX","created_at":"2026-07-05T10:20:47.289511+00:00"},{"alias_kind":"pith_short_16","alias_value":"NWM6G62RUNKXHPRY","created_at":"2026-07-05T10:20:47.289511+00:00"},{"alias_kind":"pith_short_8","alias_value":"NWM6G62R","created_at":"2026-07-05T10:20:47.289511+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.23784","citing_title":"First Results from the LSST Shadow Survey: The Restless Luminous Blue Variable AT2017des in the Virgo-Cluster Galaxy, NGC4532","ref_index":54,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT","json":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT.json","graph_json":"https://pith.science/api/pith-number/NWM6G62RUNKXHPRY5BS53F7ZBT/graph.json","events_json":"https://pith.science/api/pith-number/NWM6G62RUNKXHPRY5BS53F7ZBT/events.json","paper":"https://pith.science/paper/NWM6G62R"},"agent_actions":{"view_html":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT","download_json":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT.json","view_paper":"https://pith.science/paper/NWM6G62R","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2502.19469&json=true","fetch_graph":"https://pith.science/api/pith-number/NWM6G62RUNKXHPRY5BS53F7ZBT/graph.json","fetch_events":"https://pith.science/api/pith-number/NWM6G62RUNKXHPRY5BS53F7ZBT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT/action/storage_attestation","attest_author":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT/action/author_attestation","sign_citation":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT/action/citation_signature","submit_replication":"https://pith.science/pith/NWM6G62RUNKXHPRY5BS53F7ZBT/action/replication_record"}},"created_at":"2026-07-05T10:20:47.289511+00:00","updated_at":"2026-07-05T10:20:47.289511+00:00"}