{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:D5CNSV6NKIHXMCUIWBYP3WZW54","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":"935e1c30dbd9d2773d7504318aa48cb5da5547b5ad1995d4f28ba51729292469","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-06T19:00:12Z","title_canon_sha256":"e0347880354cd7c24b423552a8a7f15049e754f60668eed30f9fe97ddf9ec7aa"},"schema_version":"1.0","source":{"id":"2502.04448","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.04448","created_at":"2026-07-05T10:39:11Z"},{"alias_kind":"arxiv_version","alias_value":"2502.04448v1","created_at":"2026-07-05T10:39:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.04448","created_at":"2026-07-05T10:39:11Z"},{"alias_kind":"pith_short_12","alias_value":"D5CNSV6NKIHX","created_at":"2026-07-05T10:39:11Z"},{"alias_kind":"pith_short_16","alias_value":"D5CNSV6NKIHXMCUI","created_at":"2026-07-05T10:39:11Z"},{"alias_kind":"pith_short_8","alias_value":"D5CNSV6N","created_at":"2026-07-05T10:39:11Z"}],"graph_snapshots":[{"event_id":"sha256:983000aba77ff3edc6cf3fde35b483466f866416f8c234240490f420bf3fb332","target":"graph","created_at":"2026-07-05T10:39:11Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2502.04448/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The ZTF SN Ia Data Release 2 provides a perfect opportunity to perform a thorough search for, and subsequent analysis of, high-velocity components in the Si II $\\lambda$6355 feature in the pre-peak regime. The source of such features remains unclear, with potential origins in circumstellar material or density/abundance enhancements intrinsic to the SN ejecta. Therefore, they may provide clues to the elusive progenitor and explosion scenarios of SNe Ia. We employ a MCMC fitting method followed by BIC testing to classify single and double Si II $\\lambda$6355 components in the DR2. The detection ","authors_text":"A. A. Miller, A. Goobar, B. Rusholme, C. Liu, G. Dimitriadis, J. H. Terwel, J. Johansson, J. Nordin, J. Purdum, J. Sollerman, K. Maguire, L. Galbany, L. Harvey, L. Tomasella, M. Aubert, M. Deckers, M. Ginolin, M. Kasliwal, M. Rigault, M. Smith, P. Chen, P. Rosnet, R. Cartier, R. R. Laher, R. Senzel, R. Smith, S. Dhawan, U. Burgaz, W. D. Kenworthy, Y.-L. Kim","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-06T19:00:12Z","title":"ZTF SN Ia DR2: High-velocity components in the Si II $\\lambda$6355"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.04448","kind":"arxiv","version":1},"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":"sha256:17989afc0b23154aa2cc6dbf3dedf5b9ee20d512b0d71d99feb66493350e7111","target":"record","created_at":"2026-07-05T10:39:11Z","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":"935e1c30dbd9d2773d7504318aa48cb5da5547b5ad1995d4f28ba51729292469","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-06T19:00:12Z","title_canon_sha256":"e0347880354cd7c24b423552a8a7f15049e754f60668eed30f9fe97ddf9ec7aa"},"schema_version":"1.0","source":{"id":"2502.04448","kind":"arxiv","version":1}},"canonical_sha256":"1f44d957cd520f760a88b070fddb36ef1fc2fa68a17cf0598e3f72b6de143e47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f44d957cd520f760a88b070fddb36ef1fc2fa68a17cf0598e3f72b6de143e47","first_computed_at":"2026-07-05T10:39:11.173767Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:39:11.173767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dokD7QAihQxO6uYOzdD+uxrvPIppgqFiHpTFJl8OA9WRsI+q48YE4WpsMVivv7fnPjzvlvMPZaiYzzK0sx/dBw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:39:11.174243Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.04448","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17989afc0b23154aa2cc6dbf3dedf5b9ee20d512b0d71d99feb66493350e7111","sha256:983000aba77ff3edc6cf3fde35b483466f866416f8c234240490f420bf3fb332"],"state_sha256":"639f3a68714a83276c4110abcefa36351590e1c9d57b9a1e441bbc995efa3d45"}