{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:P3ZVE7SFNIL4FNN5C7GU2RYMRS","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":"e356d217b302453c2f3972f5e2e5cecf631a682fcff77f678157bbc2432d1843","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-12-06T15:50:26Z","title_canon_sha256":"bd019b4048243916a2374f7cb478f7c42b98d64ca38e2768b17d753d26776358"},"schema_version":"1.0","source":{"id":"2112.03122","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.03122","created_at":"2026-07-05T03:42:55Z"},{"alias_kind":"arxiv_version","alias_value":"2112.03122v1","created_at":"2026-07-05T03:42:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.03122","created_at":"2026-07-05T03:42:55Z"},{"alias_kind":"pith_short_12","alias_value":"P3ZVE7SFNIL4","created_at":"2026-07-05T03:42:55Z"},{"alias_kind":"pith_short_16","alias_value":"P3ZVE7SFNIL4FNN5","created_at":"2026-07-05T03:42:55Z"},{"alias_kind":"pith_short_8","alias_value":"P3ZVE7SF","created_at":"2026-07-05T03:42:55Z"}],"graph_snapshots":[{"event_id":"sha256:f1f1e812a7bf0e8fea2b65004a4b9c14c97f54811d79500ee8867604ce60aaeb","target":"graph","created_at":"2026-07-05T03:42:55Z","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/2112.03122/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present detailed investigation of a specific $i$-band light-curve feature in Type Ia supernovae (SNe Ia) using the rapid cadence and high signal-to-noise ratio light-curves obtained by the Carnegie Supernova Project. The feature is present in most SNe Ia and emerges a few days after the $i$-band maximum. It is an abrupt change in curvature in the light-curve over a few days and appears as a flattening in mild cases and a strong downward concave shape, or a \"kink\", in the most extreme cases. We computed the second derivatives of Gaussian Process interpolations to study 54 rapid-cadence light","authors_text":"A. L. Piro, C. Ashall, C. Contreras, C. R. Burns, E. Baron, E. Y. Hsiao, G. Folatelli, J. Lu, J. P. Anderson, K. Krisciunas, L. Galbany, L. Martinez, M. D. Stritzinger, M. Hamuy, M. M. Phiilips, M. Shahbandeh, N. B. Suntzeff, N. Morrell, P. Hoeflich, P. J. Pessi, S. Kumar, s. Uddin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-12-06T15:50:26Z","title":"Carnegie Supernova Project: kinky $i$-band light-curves of Type Ia supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.03122","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":"sha256:5fe56d05720707280ab9e9bb69841245d0f168654b9a7d6791925ceaac8b4bf6","target":"record","created_at":"2026-07-05T03:42:55Z","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":"e356d217b302453c2f3972f5e2e5cecf631a682fcff77f678157bbc2432d1843","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-12-06T15:50:26Z","title_canon_sha256":"bd019b4048243916a2374f7cb478f7c42b98d64ca38e2768b17d753d26776358"},"schema_version":"1.0","source":{"id":"2112.03122","kind":"arxiv","version":1}},"canonical_sha256":"7ef3527e456a17c2b5bd17cd4d470c8cb42454c63c29bf347bcb06f93e177a15","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ef3527e456a17c2b5bd17cd4d470c8cb42454c63c29bf347bcb06f93e177a15","first_computed_at":"2026-07-05T03:42:55.987918Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:42:55.987918Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c6hxgQT27okxM67FOC1haUBEgV9jvrjrmsXmBIWQ6xgDAkzsxS5fW+6A13joNAc7G/7alU59tUiRVHIdvDu8Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:42:55.988510Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.03122","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5fe56d05720707280ab9e9bb69841245d0f168654b9a7d6791925ceaac8b4bf6","sha256:f1f1e812a7bf0e8fea2b65004a4b9c14c97f54811d79500ee8867604ce60aaeb"],"state_sha256":"b21743cd44e295e1cc2cda85f81ae46d2667c6cb5364126104bcf170a1a35818"}