{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:FKVBX5MMACRXY2MZHAMVQM6YHZ","short_pith_number":"pith:FKVBX5MM","schema_version":"1.0","canonical_sha256":"2aaa1bf58c00a37c699938195833d83e5c4a6735156b4c1a1e2ff9b8a7d2c887","source":{"kind":"arxiv","id":"1802.07254","version":1},"attestation_state":"computed","paper":{"title":"Observed Type II supernova colours from the Carnegie Supernova Project-I","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A.V. Filippenko, C. Contreras, C. P. Guti\\'errez, E. Y. Hsiao, G. Folatelli, J. P. Anderson, L. Dessart, L. Galbany, M. D. Stritzinger, M. Hamuy, M. M. Phillips, N. B. Suntzeff, N. Morrell, S. Gonz\\'alez-Gait\\'an, T. de Jaeger","submitted_at":"2018-02-20T18:59:59Z","abstract_excerpt":"We present a study of observed Type II supernova (SN~II) colours using optical/near-infrared photometric data from the \\textit{Carnegie Supernovae Project-I}. We analyse four colours ($B-V$, $u-g$, $g-r$, and $g-Y$) and find that SN~II colour curves can be described by two linear regimes during the photospheric phase. The first ($s_{\\rm 1,colour}$) is steeper and has a median duration of $\\sim 40$ days. The second, shallower slope ($s_{\\rm 2,colour}$) lasts until the end of the \"plateau\" ($\\sim 80$ days). The two slopes correlate in the sense that steeper initial colour curves also imply steep"},"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":"1802.07254","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-20T18:59:59Z","cross_cats_sorted":[],"title_canon_sha256":"884953bad74e13699714c3eeaddf2b791b46aac0529fac58d8b5c53637a4594f","abstract_canon_sha256":"274ed40d24cd6fce2badd77af3bfde61a46be3a86685c1296640273fead26e27"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:05.838567Z","signature_b64":"+RoSVsIrHYcIb6YmlkhNTLdPSJY1REkUYDoZ7Lv1RXFkai3QkOFua+J6Az+xf7YhofCr4TqJKACUOjl1XhzLBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2aaa1bf58c00a37c699938195833d83e5c4a6735156b4c1a1e2ff9b8a7d2c887","last_reissued_at":"2026-05-18T00:21:05.838030Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:05.838030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observed Type II supernova colours from the Carnegie Supernova Project-I","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A.V. Filippenko, C. Contreras, C. P. Guti\\'errez, E. Y. Hsiao, G. Folatelli, J. P. Anderson, L. Dessart, L. Galbany, M. D. Stritzinger, M. Hamuy, M. M. Phillips, N. B. Suntzeff, N. Morrell, S. Gonz\\'alez-Gait\\'an, T. de Jaeger","submitted_at":"2018-02-20T18:59:59Z","abstract_excerpt":"We present a study of observed Type II supernova (SN~II) colours using optical/near-infrared photometric data from the \\textit{Carnegie Supernovae Project-I}. We analyse four colours ($B-V$, $u-g$, $g-r$, and $g-Y$) and find that SN~II colour curves can be described by two linear regimes during the photospheric phase. The first ($s_{\\rm 1,colour}$) is steeper and has a median duration of $\\sim 40$ days. The second, shallower slope ($s_{\\rm 2,colour}$) lasts until the end of the \"plateau\" ($\\sim 80$ days). The two slopes correlate in the sense that steeper initial colour curves also imply steep"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.07254","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":"1802.07254","created_at":"2026-05-18T00:21:05.838105+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.07254v1","created_at":"2026-05-18T00:21:05.838105+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.07254","created_at":"2026-05-18T00:21:05.838105+00:00"},{"alias_kind":"pith_short_12","alias_value":"FKVBX5MMACRX","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_16","alias_value":"FKVBX5MMACRXY2MZ","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_8","alias_value":"FKVBX5MM","created_at":"2026-05-18T12:32:22.470017+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/FKVBX5MMACRXY2MZHAMVQM6YHZ","json":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ.json","graph_json":"https://pith.science/api/pith-number/FKVBX5MMACRXY2MZHAMVQM6YHZ/graph.json","events_json":"https://pith.science/api/pith-number/FKVBX5MMACRXY2MZHAMVQM6YHZ/events.json","paper":"https://pith.science/paper/FKVBX5MM"},"agent_actions":{"view_html":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ","download_json":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ.json","view_paper":"https://pith.science/paper/FKVBX5MM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.07254&json=true","fetch_graph":"https://pith.science/api/pith-number/FKVBX5MMACRXY2MZHAMVQM6YHZ/graph.json","fetch_events":"https://pith.science/api/pith-number/FKVBX5MMACRXY2MZHAMVQM6YHZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ/action/storage_attestation","attest_author":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ/action/author_attestation","sign_citation":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ/action/citation_signature","submit_replication":"https://pith.science/pith/FKVBX5MMACRXY2MZHAMVQM6YHZ/action/replication_record"}},"created_at":"2026-05-18T00:21:05.838105+00:00","updated_at":"2026-05-18T00:21:05.838105+00:00"}