{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:PGAYXKTW2H6DL2YH2BRAGWNASX","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":"125810118928f7653a864a08e29a644f44d1a19d2ea58b7e5ef256fe404df3ff","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-11-04T12:29:22Z","title_canon_sha256":"123633f6ba87b6c2f62c420e532003e01172c4181a0447e00608d9ec7f93447d"},"schema_version":"1.0","source":{"id":"astro-ph/0311080","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0311080","created_at":"2026-07-04T16:37:40Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0311080v1","created_at":"2026-07-04T16:37:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0311080","created_at":"2026-07-04T16:37:40Z"},{"alias_kind":"pith_short_12","alias_value":"PGAYXKTW2H6D","created_at":"2026-07-04T16:37:40Z"},{"alias_kind":"pith_short_16","alias_value":"PGAYXKTW2H6DL2YH","created_at":"2026-07-04T16:37:40Z"},{"alias_kind":"pith_short_8","alias_value":"PGAYXKTW","created_at":"2026-07-04T16:37:40Z"}],"graph_snapshots":[{"event_id":"sha256:8049d0318bebd465d8e243b941637ecafbd149e657bb760570ea6590ddb1aacd","target":"graph","created_at":"2026-07-04T16:37:40Z","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/0311080/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate radioactivity from the decay sequence of 44Ti in young supernova remnants (SNRs), Cassiopeia A (Cas A) and SN 1987A. It is shown by a linear analysis that ionization of 44Ti, a pure electron capture decay isotope, affects the radioactivity contradistinctively in these two SNRs: Ionization of 44Ti to H-like and He-like states enhances its present radioactivity in Cas A, while such high-ionization decreases its radioactivity in SN 1987A. We briefly discuss the enhancement factor of the present radioactivity of Cas A considering microscopic (atomic/nuclear) physics combined with a ","authors_text":"Shiomi Kumagai, Yuko Motizuki","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-11-04T12:29:22Z","title":"44Ti radioactivity in young supernova remnants: Cas A and SN 1987A"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0311080","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":"sha256:3b48b0e3d7d01a092d61da7414822665ba3b599b52b0b974f416f7a83ad9b7b3","target":"record","created_at":"2026-07-04T16:37:40Z","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":"125810118928f7653a864a08e29a644f44d1a19d2ea58b7e5ef256fe404df3ff","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-11-04T12:29:22Z","title_canon_sha256":"123633f6ba87b6c2f62c420e532003e01172c4181a0447e00608d9ec7f93447d"},"schema_version":"1.0","source":{"id":"astro-ph/0311080","kind":"arxiv","version":1}},"canonical_sha256":"79818baa76d1fc35eb07d0620359a095c2b0369d51af6af7e3d3eed151269a6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79818baa76d1fc35eb07d0620359a095c2b0369d51af6af7e3d3eed151269a6e","first_computed_at":"2026-07-04T16:37:40.420446Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:37:40.420446Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L1qSrqO6SHnMA/oUiEW0WGtWAWzDNqDC7TaM9iqIRF80wGnFdrRseo6B8bMQXetUT3ZVf6c35NorN3DX9CJVBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:37:40.420781Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0311080","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3b48b0e3d7d01a092d61da7414822665ba3b599b52b0b974f416f7a83ad9b7b3","sha256:8049d0318bebd465d8e243b941637ecafbd149e657bb760570ea6590ddb1aacd"],"state_sha256":"fa9b012f61353a98fc22c1c19dbd2b271f0784522bccb5b2213ae98b22df61e8"}