{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:6JQM627BJWJXKV24B2QTL3S6TD","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":"35f867f6680ba943bd28983953f7eb861d38f049e1ce12f7b34ce1b2878ac336","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-02T19:11:23Z","title_canon_sha256":"6b4048a244cb4c3444b4d2c1fa9a4442dde7cb6197824ec576000c22a4611a86"},"schema_version":"1.0","source":{"id":"astro-ph/9907037","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9907037","created_at":"2026-07-04T23:57:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9907037v1","created_at":"2026-07-04T23:57:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9907037","created_at":"2026-07-04T23:57:18Z"},{"alias_kind":"pith_short_12","alias_value":"6JQM627BJWJX","created_at":"2026-07-04T23:57:18Z"},{"alias_kind":"pith_short_16","alias_value":"6JQM627BJWJXKV24","created_at":"2026-07-04T23:57:18Z"},{"alias_kind":"pith_short_8","alias_value":"6JQM627B","created_at":"2026-07-04T23:57:18Z"}],"graph_snapshots":[{"event_id":"sha256:0f08aaae2d5ebb26d30785336a76668ff997f04d3c524a5068554815ed4d1020","target":"graph","created_at":"2026-07-04T23:57:18Z","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/astro-ph/9907037/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present calibrated photometric measurements of the earliest detections of nearby type Ia supernovae (SNe Ia). The set of ~30 new, unfiltered CCD observations delineate the early rise behavior of SNe Ia > 18 to 10 days before maximum. Using simple empirical models, we demonstrate the strong correlation between the risetime (i.e., the time between explosion and maximum), the post-rise light-curve shape, and the peak luminosity. Using a variety of light-curve shape methods, we find the risetime to B maximum for a SN Ia with Delta m15(B)=1.1 mag and peak M_V=-19.45 mag to be 19.5+/-0.2 days. We","authors_text":"Adam G. Riess, Alexei V. Filippenko, Brian P. Schmidt, Chuck Faranda, Eric Thouvenot, Jingyao Hu, Mark Armstrong, Richard R. Treffers, Weidong Li, Yulei Qiu","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-07-02T19:11:23Z","title":"The Risetime of Nearby Type Ia Supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9907037","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":"sha256:590af4c23fff1356b2ee632e0ef1859751d84fac2dae34964ec4791e06211f05","target":"record","created_at":"2026-07-04T23:57:18Z","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":"35f867f6680ba943bd28983953f7eb861d38f049e1ce12f7b34ce1b2878ac336","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-02T19:11:23Z","title_canon_sha256":"6b4048a244cb4c3444b4d2c1fa9a4442dde7cb6197824ec576000c22a4611a86"},"schema_version":"1.0","source":{"id":"astro-ph/9907037","kind":"arxiv","version":1}},"canonical_sha256":"f260cf6be14d9375575c0ea135ee5e98d0dd49eb5ea688e8ac76761a6269f08d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f260cf6be14d9375575c0ea135ee5e98d0dd49eb5ea688e8ac76761a6269f08d","first_computed_at":"2026-07-04T23:57:18.132302Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:57:18.132302Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zbuCI65NYdDco6WcEvb7AeCkxluNJhU7RdsaTzWxb4GzvEPjQq/5+mfn+y4tSnfe3YB3HP2pL73uKo2oE4/gAA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:57:18.132755Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9907037","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:590af4c23fff1356b2ee632e0ef1859751d84fac2dae34964ec4791e06211f05","sha256:0f08aaae2d5ebb26d30785336a76668ff997f04d3c524a5068554815ed4d1020"],"state_sha256":"0a903874fed837488b2ed5d57819e4fa35b6d76f5d63427d668745ee3c2ec65e"}