{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:3GH7435Z4WLGDLB2J5TVK3FSSJ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"31af788e5a14b2381e240ce9b37949a24f215814a55dd3781c48bd9ca15897ac","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-17T21:00:11Z","title_canon_sha256":"e73918675d60fae97530c823cf88bf0e49d3a3cb236551d9082c0a81754a7cd9"},"schema_version":"1.0","source":{"id":"1502.07278","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07278","created_at":"2026-05-18T02:17:35Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07278v2","created_at":"2026-05-18T02:17:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07278","created_at":"2026-05-18T02:17:35Z"},{"alias_kind":"pith_short_12","alias_value":"3GH7435Z4WLG","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"3GH7435Z4WLGDLB2","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"3GH7435Z","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:10d90619ee71e184ea77ce7cfd0f4deb7b1d19b4b32c7c8e54a2a405029c4e1f","target":"graph","created_at":"2026-05-18T02:17:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"\"High-velocity features\" (HVFs) are spectral features in Type Ia supernovae (SNe Ia) that have minima indicating significantly higher (by greater than about 6000 km/s) velocities than typical \"photospheric-velocity features\" (PVFs). The PVFs are absorption features with minima indicating typical photospheric (i.e., bulk ejecta) velocities (usually ~9000-15,000 km/s near B-band maximum brightness). In this work we undertake the most in-depth study of HVFs ever performed. The dataset used herein consists of 445 low-resolution optical and near-infrared (NIR) spectra (at epochs up to 5 d past maxi","authors_text":"Alexei V. Filippenko, Barnabas Barna, Brian W. Mulligan, G. H. Marion, J. Craig Wheeler, Jeffrey M. Silverman, Jozsef Vinko, Tamas Szalai","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-17T21:00:11Z","title":"High-Velocity Features of Calcium and Silicon in the Spectra of Type Ia Supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07278","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d26b7acf0dc338ee8c5a014c7edac4edeb8b48badda31b8108bb934ce4546151","target":"record","created_at":"2026-05-18T02:17:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"31af788e5a14b2381e240ce9b37949a24f215814a55dd3781c48bd9ca15897ac","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-02-17T21:00:11Z","title_canon_sha256":"e73918675d60fae97530c823cf88bf0e49d3a3cb236551d9082c0a81754a7cd9"},"schema_version":"1.0","source":{"id":"1502.07278","kind":"arxiv","version":2}},"canonical_sha256":"d98ffe6fb9e59661ac3a4f67556cb29269ae9e8e1efdd9c13e071c5fe8041cdc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d98ffe6fb9e59661ac3a4f67556cb29269ae9e8e1efdd9c13e071c5fe8041cdc","first_computed_at":"2026-05-18T02:17:35.717568Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:35.717568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wpshxUb5yV/QNcxt70GHWByRMx3O+mePJ8FtXWbwG1yO+ivP92sKeB+2AhwVeE8n5TqpjLuJNN1XlL4f8LaVAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:35.718218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.07278","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d26b7acf0dc338ee8c5a014c7edac4edeb8b48badda31b8108bb934ce4546151","sha256:10d90619ee71e184ea77ce7cfd0f4deb7b1d19b4b32c7c8e54a2a405029c4e1f"],"state_sha256":"b603254ed8bb79f4672bf1abb99955efdc3742e01efe71e821c46b5970362ac3"}