{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:G6EA4TPPYW4KSEH3QKQP6UH7NV","short_pith_number":"pith:G6EA4TPP","schema_version":"1.0","canonical_sha256":"37880e4defc5b8a910fb82a0ff50ff6d786b63cb53c7e01e3c42e12dc53370dd","source":{"kind":"arxiv","id":"2605.14081","version":1},"attestation_state":"computed","paper":{"title":"SN2023ixf: ultraviolet-to-infrared radiative-transfer modeling of the nebular-phase evolution until 1000 days","license":"http://creativecommons.org/licenses/by/4.0/","headline":"SN2023ixf's nebular light curve to 1000 days requires dust formation in the cold dense shell plus enhanced gamma-ray escape after 200 days.","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Alexei V. Filippenko, Claudia Gutierrez, K. Azalee Bostroem, Lluis Galbany, Luc Dessart, Stefano Valenti, Thomas G. Brink, Weikang Zheng, Wynn V. Jacobson-Galan","submitted_at":"2026-05-13T20:06:37Z","abstract_excerpt":"We present non-local thermodynamic equilibrium radiative-transfer modeling of SN2023ixf during the nebular phase out to 1000d, using the same ejecta that matched its photospheric evolution, namely a partially stripped red-supergiant star of initially 15Msun whose terminal explosion yielded ejecta with 7-8Msun, kinetic energy of 1.2e51erg, and 56Ni mass of 0.05Msun, augmented with a cold dense shell (CDS) of 0.2Msun at 8000km/s. Interaction with circumstellar material persists at all epochs, powering the ultraviolet (UV) flux at all times, but dominating the optical only after ~600d. Matching t"},"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":true,"formal_links_present":false},"canonical_record":{"source":{"id":"2605.14081","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-05-13T20:06:37Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"09ba543a426971a496f7dfca1655f87dd9f0467ba7dc7e8536ca2b72a98a529f","abstract_canon_sha256":"9e08fbd2e7740cf8913198a5cbe82133ff66d321bb502d6ef533048f9b7e1c93"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:12.312628Z","signature_b64":"qwIvg3GBNz/UKizeqdJJjex3Jk+ukKHDOpAu186LOiqvLGPpMFJF2MJPhhOShgsBQTH0lsDVuL8LP6/JtWndDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"37880e4defc5b8a910fb82a0ff50ff6d786b63cb53c7e01e3c42e12dc53370dd","last_reissued_at":"2026-05-17T23:39:12.311457Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:12.311457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"SN2023ixf: ultraviolet-to-infrared radiative-transfer modeling of the nebular-phase evolution until 1000 days","license":"http://creativecommons.org/licenses/by/4.0/","headline":"SN2023ixf's nebular light curve to 1000 days requires dust formation in the cold dense shell plus enhanced gamma-ray escape after 200 days.","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Alexei V. Filippenko, Claudia Gutierrez, K. Azalee Bostroem, Lluis Galbany, Luc Dessart, Stefano Valenti, Thomas G. Brink, Weikang Zheng, Wynn V. Jacobson-Galan","submitted_at":"2026-05-13T20:06:37Z","abstract_excerpt":"We present non-local thermodynamic equilibrium radiative-transfer modeling of SN2023ixf during the nebular phase out to 1000d, using the same ejecta that matched its photospheric evolution, namely a partially stripped red-supergiant star of initially 15Msun whose terminal explosion yielded ejecta with 7-8Msun, kinetic energy of 1.2e51erg, and 56Ni mass of 0.05Msun, augmented with a cold dense shell (CDS) of 0.2Msun at 8000km/s. Interaction with circumstellar material persists at all epochs, powering the ultraviolet (UV) flux at all times, but dominating the optical only after ~600d. Matching t"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Matching the V-band light curve requires invoking both enhanced gamma-ray escape and dust formation after ~200d, first in the CDS and eventually in the inner ejecta as well.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the same ejecta parameters (7-8 Msun, 1.2e51 erg, 0.05 Msun of 56Ni) that matched the photospheric phase continue to apply without modification throughout the nebular phase to 1000 days.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Radiative-transfer models of SN2023ixf require a 0.2 solar-mass cold dense shell plus rising dust mass to match its nebular-phase UV-optical-IR evolution to 1000 days.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"SN2023ixf's nebular light curve to 1000 days requires dust formation in the cold dense shell plus enhanced gamma-ray escape after 200 days.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6878ca136bda3b3933ae6c0e40a46a7e006b9d1c84bbdb1797152f73cd18d9df"},"source":{"id":"2605.14081","kind":"arxiv","version":1},"verdict":{"id":"6d44ea67-332b-4b55-938f-5e96fb2296e7","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T02:25:52.085188Z","strongest_claim":"Matching the V-band light curve requires invoking both enhanced gamma-ray escape and dust formation after ~200d, first in the CDS and eventually in the inner ejecta as well.","one_line_summary":"Radiative-transfer models of SN2023ixf require a 0.2 solar-mass cold dense shell plus rising dust mass to match its nebular-phase UV-optical-IR evolution to 1000 days.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the same ejecta parameters (7-8 Msun, 1.2e51 erg, 0.05 Msun of 56Ni) that matched the photospheric phase continue to apply without modification throughout the nebular phase to 1000 days.","pith_extraction_headline":"SN2023ixf's nebular light curve to 1000 days requires dust formation in the cold dense shell plus enhanced gamma-ray escape after 200 days."},"references":{"count":104,"sample":[{"doi":"","year":2025,"title":"Baron, E., Ashall, C., DerKacy, J. M., et al. 2025, ApJ, 994, 249","work_id":"2cc9c38f-415d-4877-8d5a-5af500ea6ff0","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"C., Orellana, M., Folatelli, G., et al","work_id":"956e9044-ef06-4f26-abf9-21d4949e9eb7","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2017,"title":"J., & Milisavljevic, D","work_id":"e4d06444-bf98-4b6c-a8a2-a04206bd5622","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1998,"title":"I., Eastman, R., Bartunov, O","work_id":"b8636171-e7c1-4465-a98f-da508a31b6aa","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2023,"title":"A., Pearson, J., Shrestha, M., et al","work_id":"2509d1e3-40e0-4955-9582-b8f92ce3e6fe","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":104,"snapshot_sha256":"24d7725fce456f4f7ebab22d4cc90f35fa821453a77b04e58af552392642ec18","internal_anchors":1},"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":"2605.14081","created_at":"2026-05-17T23:39:12.311896+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.14081v1","created_at":"2026-05-17T23:39:12.311896+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.14081","created_at":"2026-05-17T23:39:12.311896+00:00"},{"alias_kind":"pith_short_12","alias_value":"G6EA4TPPYW4K","created_at":"2026-05-18T12:33:37.589309+00:00"},{"alias_kind":"pith_short_16","alias_value":"G6EA4TPPYW4KSEH3","created_at":"2026-05-18T12:33:37.589309+00:00"},{"alias_kind":"pith_short_8","alias_value":"G6EA4TPP","created_at":"2026-05-18T12:33:37.589309+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/G6EA4TPPYW4KSEH3QKQP6UH7NV","json":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV.json","graph_json":"https://pith.science/api/pith-number/G6EA4TPPYW4KSEH3QKQP6UH7NV/graph.json","events_json":"https://pith.science/api/pith-number/G6EA4TPPYW4KSEH3QKQP6UH7NV/events.json","paper":"https://pith.science/paper/G6EA4TPP"},"agent_actions":{"view_html":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV","download_json":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV.json","view_paper":"https://pith.science/paper/G6EA4TPP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.14081&json=true","fetch_graph":"https://pith.science/api/pith-number/G6EA4TPPYW4KSEH3QKQP6UH7NV/graph.json","fetch_events":"https://pith.science/api/pith-number/G6EA4TPPYW4KSEH3QKQP6UH7NV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV/action/storage_attestation","attest_author":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV/action/author_attestation","sign_citation":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV/action/citation_signature","submit_replication":"https://pith.science/pith/G6EA4TPPYW4KSEH3QKQP6UH7NV/action/replication_record"}},"created_at":"2026-05-17T23:39:12.311896+00:00","updated_at":"2026-05-17T23:39:12.311896+00:00"}