{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:K7ATU3LQ54J7DPZZKWZKWIWE6R","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":"2d47ec9613bce3aa8d0909b835681b766e6bf13e7c98ab683a91187d97b15103","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-10-24T18:07:32Z","title_canon_sha256":"9f22adb8b49927d98173dff2cef8c19788078d6fdcb3fa704179eff005af5ab1"},"schema_version":"1.0","source":{"id":"1410.6759","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.6759","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1410.6759v1","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.6759","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"K7ATU3LQ54J7","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"K7ATU3LQ54J7DPZZ","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"K7ATU3LQ","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:859730551076ca1d665deb1f0423a0d65acdd08fdc46291fb5f1c5daec2cf7e3","target":"graph","created_at":"2026-05-18T01:46:22Z","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":"We present late-time ($200-400$ days) near-infrared spectral evolution for the Type Ia supernova SN 2005df. The spectra show numerous strong emission features of [CoII], [CoIII], and [FeII] throughout the $0.8-1.8$\\mu m region. As the spectrum ages, the cobalt features fade as would be expected from the decay of $^{56}$Co to $^{56}$Fe. We show that the strong and isolated [FeII] emission line at $1.644$\\mu m provides a unique tool to analyze near-infrared spectra of Type Ia supernovae. Normalization of spectra to this line allows separation of features produced by stable versus unstable isotop","authors_text":"Christopher L. Gerardy, Peter Hoeflich, Tiara Diamond","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-10-24T18:07:32Z","title":"Late-time near-infrared observations of SN 2005df"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.6759","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":"sha256:8646fab395ef84d079f7cda82b6f934a9e2ce31052bb8bd8c51087215642fcee","target":"record","created_at":"2026-05-18T01:46:22Z","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":"2d47ec9613bce3aa8d0909b835681b766e6bf13e7c98ab683a91187d97b15103","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-10-24T18:07:32Z","title_canon_sha256":"9f22adb8b49927d98173dff2cef8c19788078d6fdcb3fa704179eff005af5ab1"},"schema_version":"1.0","source":{"id":"1410.6759","kind":"arxiv","version":1}},"canonical_sha256":"57c13a6d70ef13f1bf3955b2ab22c4f45cc17d29075309a90dda926a632caea9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57c13a6d70ef13f1bf3955b2ab22c4f45cc17d29075309a90dda926a632caea9","first_computed_at":"2026-05-18T01:46:22.283439Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:22.283439Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H67DFiJC69tFEM8+ElFdbsCoqRrfNkEJegs2f5N+i+PiS3rHFAokLqjARNtdKi+8zLBPHan2SAPjf+rCMz+cAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:22.283946Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.6759","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8646fab395ef84d079f7cda82b6f934a9e2ce31052bb8bd8c51087215642fcee","sha256:859730551076ca1d665deb1f0423a0d65acdd08fdc46291fb5f1c5daec2cf7e3"],"state_sha256":"312cabea7fd375a6906454f3598ab04b306f0c281ba493d589d93fd50492946f"}