{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2006:5HQMN4IJC6KJESDEKX4PPH2UBH","short_pith_number":"pith:5HQMN4IJ","schema_version":"1.0","canonical_sha256":"e9e0c6f109179492486455f8f79f5409cb7134725408e830f3ebffd453811d26","source":{"kind":"arxiv","id":"astro-ph/0611356","version":1},"attestation_state":"computed","paper":{"title":"Nearby Supernova Factory Observations of SN 2006D: On Sporadic Carbon Signatures in Early Type Ia Supernova Spectra","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Bauer, B. A. Weaver, C. Aragon, C. Baltay, C. Buton, D. Rabinowitz, E. Baron, E. Gangler, E. Pecontal, G. Aldering, G. Rigaudier, G. Smadja, J. Parrent, K. Runge, L. Wang, P. Antilogus, P. Nugent, R. Kessler, R. Pain, R. Pereira, R. Scalzo, S. Bailey, S. Bongard, S. Gilles, S. Loken, S. Perlmutter, The Nearby Supernova Factory: R. C. Thomas, Y. Copin","submitted_at":"2006-11-10T23:27:41Z","abstract_excerpt":"We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from -7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at photospheric velocities observed in a SN Ia to date. The earliest spectrum exhibits C II absorption features below 14,000 km/s, including a distinctive C II \\lambda 6580 absorption feature. The carbon signatures dissipate as the SN approaches peak brightness. In addition to discussing implications of photospheric-velocity carbon for white dwarf explosion models, we outline some factors that may influence"},"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":"astro-ph/0611356","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-11-10T23:27:41Z","cross_cats_sorted":[],"title_canon_sha256":"5dda14f6df2413184260d05d87947f0b3dc7150706968d0fe991a83da7a11e12","abstract_canon_sha256":"3707017459b8abaec9a34f2569bdf9c6cb42bb0af499f830243200c0cb516903"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:42.976249Z","signature_b64":"80YngNiexyWN2SkmJhwk91+8rQzg98HoNJkOxC9t3N/mgCC5mzi30id/VCq8aNHZ0zPWA/ZV2HQNQ/UgBK52CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9e0c6f109179492486455f8f79f5409cb7134725408e830f3ebffd453811d26","last_reissued_at":"2026-05-18T03:47:42.975613Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:42.975613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nearby Supernova Factory Observations of SN 2006D: On Sporadic Carbon Signatures in Early Type Ia Supernova Spectra","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Bauer, B. A. Weaver, C. Aragon, C. Baltay, C. Buton, D. Rabinowitz, E. Baron, E. Gangler, E. Pecontal, G. Aldering, G. Rigaudier, G. Smadja, J. Parrent, K. Runge, L. Wang, P. Antilogus, P. Nugent, R. Kessler, R. Pain, R. Pereira, R. Scalzo, S. Bailey, S. Bongard, S. Gilles, S. Loken, S. Perlmutter, The Nearby Supernova Factory: R. C. Thomas, Y. Copin","submitted_at":"2006-11-10T23:27:41Z","abstract_excerpt":"We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from -7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at photospheric velocities observed in a SN Ia to date. The earliest spectrum exhibits C II absorption features below 14,000 km/s, including a distinctive C II \\lambda 6580 absorption feature. The carbon signatures dissipate as the SN approaches peak brightness. In addition to discussing implications of photospheric-velocity carbon for white dwarf explosion models, we outline some factors that may influence"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0611356","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":"astro-ph/0611356","created_at":"2026-05-18T03:47:42.975707+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0611356v1","created_at":"2026-05-18T03:47:42.975707+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0611356","created_at":"2026-05-18T03:47:42.975707+00:00"},{"alias_kind":"pith_short_12","alias_value":"5HQMN4IJC6KJ","created_at":"2026-05-18T12:25:53.939244+00:00"},{"alias_kind":"pith_short_16","alias_value":"5HQMN4IJC6KJESDE","created_at":"2026-05-18T12:25:53.939244+00:00"},{"alias_kind":"pith_short_8","alias_value":"5HQMN4IJ","created_at":"2026-05-18T12:25:53.939244+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/5HQMN4IJC6KJESDEKX4PPH2UBH","json":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH.json","graph_json":"https://pith.science/api/pith-number/5HQMN4IJC6KJESDEKX4PPH2UBH/graph.json","events_json":"https://pith.science/api/pith-number/5HQMN4IJC6KJESDEKX4PPH2UBH/events.json","paper":"https://pith.science/paper/5HQMN4IJ"},"agent_actions":{"view_html":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH","download_json":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH.json","view_paper":"https://pith.science/paper/5HQMN4IJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0611356&json=true","fetch_graph":"https://pith.science/api/pith-number/5HQMN4IJC6KJESDEKX4PPH2UBH/graph.json","fetch_events":"https://pith.science/api/pith-number/5HQMN4IJC6KJESDEKX4PPH2UBH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH/action/storage_attestation","attest_author":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH/action/author_attestation","sign_citation":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH/action/citation_signature","submit_replication":"https://pith.science/pith/5HQMN4IJC6KJESDEKX4PPH2UBH/action/replication_record"}},"created_at":"2026-05-18T03:47:42.975707+00:00","updated_at":"2026-05-18T03:47:42.975707+00:00"}