{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:TKBAC4CD5ECADB53ECM6CBKCK4","short_pith_number":"pith:TKBAC4CD","schema_version":"1.0","canonical_sha256":"9a82017043e9040187bb2099e105425701a4402335731e458f801782b6eb312c","source":{"kind":"arxiv","id":"1802.09469","version":1},"attestation_state":"computed","paper":{"title":"The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: broad, multiple components indicate aspherical explosion cores","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. Ashall, C. Gall, E. Hsiao, E. Pian, M. D. Stritzinger, M. M. Phillips, P. A. Mazzali, P. Hoeflich","submitted_at":"2018-02-26T17:32:39Z","abstract_excerpt":"The nebular-epoch spectrum of the rapidly declining, \"transitional\" type Ia supernova (SN) 2007on showed double emission peaks, which have been interpreted as indicating that the SN was the result of the direct collision of two white dwarfs. The spectrum can be reproduced using two distinct emission components, one red-shifted and one blue shifted. These components are similar in mass but have slightly different degrees of ionization. They recede from one another at a line-of-sight speed larger than the sum of the combined expansion velocities of their emitting cores, thereby acting as two ind"},"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":"1802.09469","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-26T17:32:39Z","cross_cats_sorted":[],"title_canon_sha256":"0127c04c38671addef1a64b9963e66fc105a2b0ec0d9949dbed0b6993ca3b4fe","abstract_canon_sha256":"e61a4908ab0a740f869a3a71187af54cef637895d95664d4e71d9bdcb667e30e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:19.455523Z","signature_b64":"hE/OwVdCiNk+EJEmXaiCaKePbEuAjeJug74xqCvVtZ5dLhFFnJrstWjdfbDhWObDXk2vRlg4gtGUfMMGMsBbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a82017043e9040187bb2099e105425701a4402335731e458f801782b6eb312c","last_reissued_at":"2026-05-18T00:21:19.454847Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:19.454847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: broad, multiple components indicate aspherical explosion cores","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. Ashall, C. Gall, E. Hsiao, E. Pian, M. D. Stritzinger, M. M. Phillips, P. A. Mazzali, P. Hoeflich","submitted_at":"2018-02-26T17:32:39Z","abstract_excerpt":"The nebular-epoch spectrum of the rapidly declining, \"transitional\" type Ia supernova (SN) 2007on showed double emission peaks, which have been interpreted as indicating that the SN was the result of the direct collision of two white dwarfs. The spectrum can be reproduced using two distinct emission components, one red-shifted and one blue shifted. These components are similar in mass but have slightly different degrees of ionization. They recede from one another at a line-of-sight speed larger than the sum of the combined expansion velocities of their emitting cores, thereby acting as two ind"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09469","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":""},"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":"1802.09469","created_at":"2026-05-18T00:21:19.454917+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.09469v1","created_at":"2026-05-18T00:21:19.454917+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09469","created_at":"2026-05-18T00:21:19.454917+00:00"},{"alias_kind":"pith_short_12","alias_value":"TKBAC4CD5ECA","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_16","alias_value":"TKBAC4CD5ECADB53","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_8","alias_value":"TKBAC4CD","created_at":"2026-05-18T12:32:53.628368+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/TKBAC4CD5ECADB53ECM6CBKCK4","json":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4.json","graph_json":"https://pith.science/api/pith-number/TKBAC4CD5ECADB53ECM6CBKCK4/graph.json","events_json":"https://pith.science/api/pith-number/TKBAC4CD5ECADB53ECM6CBKCK4/events.json","paper":"https://pith.science/paper/TKBAC4CD"},"agent_actions":{"view_html":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4","download_json":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4.json","view_paper":"https://pith.science/paper/TKBAC4CD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.09469&json=true","fetch_graph":"https://pith.science/api/pith-number/TKBAC4CD5ECADB53ECM6CBKCK4/graph.json","fetch_events":"https://pith.science/api/pith-number/TKBAC4CD5ECADB53ECM6CBKCK4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4/action/storage_attestation","attest_author":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4/action/author_attestation","sign_citation":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4/action/citation_signature","submit_replication":"https://pith.science/pith/TKBAC4CD5ECADB53ECM6CBKCK4/action/replication_record"}},"created_at":"2026-05-18T00:21:19.454917+00:00","updated_at":"2026-05-18T00:21:19.454917+00:00"}