{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:C3D355DU72EJPLU24ZKFZH7ZF3","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":"750b2fad712d019247ad9e93437f0b49d91e51711e8ca702820d8e086ce6c5cf","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-11-27T19:00:26Z","title_canon_sha256":"e15429803fc8e2e259bf3e9641e9685814622036bcdaeaf034de2d80fdbac42c"},"schema_version":"1.0","source":{"id":"2311.16245","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2311.16245","created_at":"2026-07-05T08:04:16Z"},{"alias_kind":"arxiv_version","alias_value":"2311.16245v2","created_at":"2026-07-05T08:04:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2311.16245","created_at":"2026-07-05T08:04:16Z"},{"alias_kind":"pith_short_12","alias_value":"C3D355DU72EJ","created_at":"2026-07-05T08:04:16Z"},{"alias_kind":"pith_short_16","alias_value":"C3D355DU72EJPLU2","created_at":"2026-07-05T08:04:16Z"},{"alias_kind":"pith_short_8","alias_value":"C3D355DU","created_at":"2026-07-05T08:04:16Z"}],"graph_snapshots":[{"event_id":"sha256:3c1bebacd9e12e315319daae8a5d7b35acd9a61a7f8e7930c86a30aa7ee2ea61","target":"graph","created_at":"2026-07-05T08:04:16Z","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/2311.16245/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"It is widely accepted that the width-luminosity relation used to standardize normal Type Ia supernovae (SNe Ia) breaks down in underluminous, 1991bg-like SNe Ia. This breakdown may be due to the choice of parameter used as a stand-in for the width of the SN Ia light curve. Using the colour stretch parameter $s_\\mathrm{BV}$ instead of older parameters resolves this issue. Here, I assemble a sample of 14 nearby 1991bg-like SNe Ia from the literature, all of which have independent host-galaxy distance moduli and little to no reddening. I use Gaussian process regression to fit the light curves of ","authors_text":"Or Graur","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-11-27T19:00:26Z","title":"Underluminous 1991bg-like Type Ia supernovae are standardizable candles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2311.16245","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":"sha256:000a3db5672f112ea1cd62c4b65de16c3c3a132c230066360745a1e393169e91","target":"record","created_at":"2026-07-05T08:04:16Z","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":"750b2fad712d019247ad9e93437f0b49d91e51711e8ca702820d8e086ce6c5cf","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-11-27T19:00:26Z","title_canon_sha256":"e15429803fc8e2e259bf3e9641e9685814622036bcdaeaf034de2d80fdbac42c"},"schema_version":"1.0","source":{"id":"2311.16245","kind":"arxiv","version":2}},"canonical_sha256":"16c7bef474fe8897ae9ae6545c9ff92edc165be708c98313bf3f6cfbfd6cccb8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16c7bef474fe8897ae9ae6545c9ff92edc165be708c98313bf3f6cfbfd6cccb8","first_computed_at":"2026-07-05T08:04:16.192612Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:04:16.192612Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kX5Bk4anB0kVi/lePH4Q2NIjdSlrkZ65MP5qC58JZ63lq6rjtqWXJOUMX7vZkvi17Vs2CNEFIUcB10MCtdfjAA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:04:16.193010Z","signed_message":"canonical_sha256_bytes"},"source_id":"2311.16245","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:000a3db5672f112ea1cd62c4b65de16c3c3a132c230066360745a1e393169e91","sha256:3c1bebacd9e12e315319daae8a5d7b35acd9a61a7f8e7930c86a30aa7ee2ea61"],"state_sha256":"938e7e9ae074f9441572c09ca444e420ac7107d8cf6299eb01b70cc33a6d7f1a"}