{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:FMWT3N5ADH2RLSIRJ7PTMDEA5D","short_pith_number":"pith:FMWT3N5A","schema_version":"1.0","canonical_sha256":"2b2d3db7a019f515c9114fdf360c80e8eb4668d0cef7840fa8d866afebdde5c2","source":{"kind":"arxiv","id":"astro-ph/0703468","version":1},"attestation_state":"computed","paper":{"title":"Optical Signatures of Circumstellar Interaction in Type IIP Supernovae","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Nikolai N. Chugai, Roger A. Chevalier, Victor P. Utrobin","submitted_at":"2007-03-17T14:21:40Z","abstract_excerpt":"We propose new diagnostics for circumstellar interaction in Type IIP supernovae by the detection of high velocity (HV) absorption features in Halpha and He I 10830 A lines during the photospheric stage. To demonstrate the method, we compute the ionization and excitation of H and He in supernova ejecta taking into account time-dependent effects and X-ray irradiation. We find that the interaction with a typical red supergiant wind should result in the enhanced excitation of the outer layers of unshocked ejecta and the emergence of corresponding HV absorption, i.e. a depression in the blue absorp"},"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/0703468","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-17T14:21:40Z","cross_cats_sorted":[],"title_canon_sha256":"76742144c28a1a06dd4a1073e150031aca2b84d7d8f7b6ef1ded97149c61cccc","abstract_canon_sha256":"6717421dbd4257ad11cabc3dfb3f78cb68e82fa3af0c4010be891f7bcef565fb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:05.572885Z","signature_b64":"JlWOFpLZ7UJef1mxqx4DvNeR4lPomKO8hETYEEGmeq4cnT49Eu0gu5oZt+E5sCoZhaL3D61+lrYpGJFcDtZ/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b2d3db7a019f515c9114fdf360c80e8eb4668d0cef7840fa8d866afebdde5c2","last_reissued_at":"2026-05-18T04:29:05.572488Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:05.572488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optical Signatures of Circumstellar Interaction in Type IIP Supernovae","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Nikolai N. Chugai, Roger A. Chevalier, Victor P. Utrobin","submitted_at":"2007-03-17T14:21:40Z","abstract_excerpt":"We propose new diagnostics for circumstellar interaction in Type IIP supernovae by the detection of high velocity (HV) absorption features in Halpha and He I 10830 A lines during the photospheric stage. To demonstrate the method, we compute the ionization and excitation of H and He in supernova ejecta taking into account time-dependent effects and X-ray irradiation. We find that the interaction with a typical red supergiant wind should result in the enhanced excitation of the outer layers of unshocked ejecta and the emergence of corresponding HV absorption, i.e. a depression in the blue absorp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0703468","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/0703468","created_at":"2026-05-18T04:29:05.572547+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0703468v1","created_at":"2026-05-18T04:29:05.572547+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0703468","created_at":"2026-05-18T04:29:05.572547+00:00"},{"alias_kind":"pith_short_12","alias_value":"FMWT3N5ADH2R","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_16","alias_value":"FMWT3N5ADH2RLSIR","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_8","alias_value":"FMWT3N5A","created_at":"2026-05-18T12:25:55.427421+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/FMWT3N5ADH2RLSIRJ7PTMDEA5D","json":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D.json","graph_json":"https://pith.science/api/pith-number/FMWT3N5ADH2RLSIRJ7PTMDEA5D/graph.json","events_json":"https://pith.science/api/pith-number/FMWT3N5ADH2RLSIRJ7PTMDEA5D/events.json","paper":"https://pith.science/paper/FMWT3N5A"},"agent_actions":{"view_html":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D","download_json":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D.json","view_paper":"https://pith.science/paper/FMWT3N5A","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0703468&json=true","fetch_graph":"https://pith.science/api/pith-number/FMWT3N5ADH2RLSIRJ7PTMDEA5D/graph.json","fetch_events":"https://pith.science/api/pith-number/FMWT3N5ADH2RLSIRJ7PTMDEA5D/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D/action/storage_attestation","attest_author":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D/action/author_attestation","sign_citation":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D/action/citation_signature","submit_replication":"https://pith.science/pith/FMWT3N5ADH2RLSIRJ7PTMDEA5D/action/replication_record"}},"created_at":"2026-05-18T04:29:05.572547+00:00","updated_at":"2026-05-18T04:29:05.572547+00:00"}