{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:B5TIKOKIFM5WCFGZQ3DDUU32TY","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":"b151108b21230e2ea2009d68bb58e2652d5bbde1bff7bdf2209a0ac42ac1c615","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-10-30T15:04:56Z","title_canon_sha256":"c6cf3f6bab69e68019cc4ed55a03df160e40f1abd0281c70cddae5eaddc60ccc"},"schema_version":"1.0","source":{"id":"1410.8394","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.8394","created_at":"2026-05-18T01:41:38Z"},{"alias_kind":"arxiv_version","alias_value":"1410.8394v2","created_at":"2026-05-18T01:41:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.8394","created_at":"2026-05-18T01:41:38Z"},{"alias_kind":"pith_short_12","alias_value":"B5TIKOKIFM5W","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"B5TIKOKIFM5WCFGZ","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"B5TIKOKI","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:e614e58e7a561c32e6dedafda81cca00539c9b589677ba850584f491d32e0464","target":"graph","created_at":"2026-05-18T01:41:38Z","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":"SN 2012ec is a Type IIP supernova (SN) with a progenitor detection and comprehensive photospheric-phase observational coverage. Here, we present Very Large Telescope and PESSTO observations of this SN in the nebular phase. We model the nebular [O I] 6300, 6364 lines and find their strength to suggest a progenitor main-sequence mass of 13-15 Msun. SN 2012ec is unique among hydrogen-rich SNe in showing a distinct and unblended line of stable nickel [Ni II] 7378. This line is produced by 58Ni, a nuclear burning ash whose abundance is a sensitive tracer of explosive burning conditions. Using spect","authors_text":"Anders Jerkstrand, Avishay Gal-Yam, Claes Fransson, Cosimo Inserra, Cristina Barbarino, Jason Spyromilio, Jesper Sollerman, Kate Maguire, Lina Tomasella, Maria Teresa Botticella, Massimo Dall'Ora, Massimo Della Valle, Morgan Fraser, Paolo Mazzali, Stefano Valenti, Stephen J. Smartt, Ting-Wan Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-10-30T15:04:56Z","title":"Supersolar Ni/Fe production in the Type IIP SN 2012ec"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.8394","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:a6f8a4eec4c69bdf4a30bf83469613e3820ba4d02965ad2d4e7940f51479c3a5","target":"record","created_at":"2026-05-18T01:41:38Z","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":"b151108b21230e2ea2009d68bb58e2652d5bbde1bff7bdf2209a0ac42ac1c615","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-10-30T15:04:56Z","title_canon_sha256":"c6cf3f6bab69e68019cc4ed55a03df160e40f1abd0281c70cddae5eaddc60ccc"},"schema_version":"1.0","source":{"id":"1410.8394","kind":"arxiv","version":2}},"canonical_sha256":"0f668539482b3b6114d986c63a537a9e17c2d9c0fa687ca756d6d35c06b20d6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f668539482b3b6114d986c63a537a9e17c2d9c0fa687ca756d6d35c06b20d6b","first_computed_at":"2026-05-18T01:41:38.516199Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:38.516199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6388TORbH29aCA0mFQqm/Bo1PqexbGEqGIC0CHwLsGrG9FWih1MIRYAFVqZaNGmhRLTr4HHWarwyA+vPoNuRCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:38.516640Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.8394","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6f8a4eec4c69bdf4a30bf83469613e3820ba4d02965ad2d4e7940f51479c3a5","sha256:e614e58e7a561c32e6dedafda81cca00539c9b589677ba850584f491d32e0464"],"state_sha256":"de3f641597052efd813e39e6e688e4c8bf09463efd84c0379f4b0d8293185632"}