{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:67LJNNWHJBM4Y4K5ZSIRJCURHY","short_pith_number":"pith:67LJNNWH","canonical_record":{"source":{"id":"1307.3105","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-11T13:34:28Z","cross_cats_sorted":[],"title_canon_sha256":"f34e943b215fb806d40364bec5ab9361e582892fd283d969ddd8766fd4760b7b","abstract_canon_sha256":"52779b7e70a6f482284131b49fc65bf43ac2c0ad9805922bed55057cc95cd31a"},"schema_version":"1.0"},"canonical_sha256":"f7d696b6c74859cc715dcc91148a913e2f9016c84b33a4d967155055f2e1f649","source":{"kind":"arxiv","id":"1307.3105","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.3105","created_at":"2026-05-18T01:48:51Z"},{"alias_kind":"arxiv_version","alias_value":"1307.3105v1","created_at":"2026-05-18T01:48:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.3105","created_at":"2026-05-18T01:48:51Z"},{"alias_kind":"pith_short_12","alias_value":"67LJNNWHJBM4","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"67LJNNWHJBM4Y4K5","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"67LJNNWH","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:67LJNNWHJBM4Y4K5ZSIRJCURHY","target":"record","payload":{"canonical_record":{"source":{"id":"1307.3105","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-11T13:34:28Z","cross_cats_sorted":[],"title_canon_sha256":"f34e943b215fb806d40364bec5ab9361e582892fd283d969ddd8766fd4760b7b","abstract_canon_sha256":"52779b7e70a6f482284131b49fc65bf43ac2c0ad9805922bed55057cc95cd31a"},"schema_version":"1.0"},"canonical_sha256":"f7d696b6c74859cc715dcc91148a913e2f9016c84b33a4d967155055f2e1f649","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:51.689755Z","signature_b64":"rFTzTKj1mZotPuSvYZdD6T5asUFIwsnkySZqZq0/8g7UxMo9G4ICRjhhxL0n0nDhv6wjWbmNuRnH9ZhHh4GHDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7d696b6c74859cc715dcc91148a913e2f9016c84b33a4d967155055f2e1f649","last_reissued_at":"2026-05-18T01:48:51.688977Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:51.688977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.3105","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U4O//5fj7AHK3aBmT8OmPt6B3AtIcA4Dx9CAgBQ5Scbn4l1VwKFj4nMKGvDQO8+1RYg7BNtu1EWp9hRZeHIeCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T10:16:33.878018Z"},"content_sha256":"daeb693b49e2225f9180560b1f1c0261fa221d28037e987bba541d2cdc6cb3f6","schema_version":"1.0","event_id":"sha256:daeb693b49e2225f9180560b1f1c0261fa221d28037e987bba541d2cdc6cb3f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:67LJNNWHJBM4Y4K5ZSIRJCURHY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-LTE models for synthetic spectra of type Ia supernovae. IV. A modified Feautrier scheme for opacity-sampled pseudo-continua at high expansion velocities and application to synthetic SN Ia spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. W. A. Pauldrach, D. N. Sauer, P. J. N. Hultzsch, T. L. Hoffmann","submitted_at":"2013-07-11T13:34:28Z","abstract_excerpt":"Context. Type Ia supernovae (SN Ia) have become an invaluable cosmological tool as their exceptional brightness makes them observable even at very large distances (up to redshifts around z~1). To investigate possible systematic differences between local and distant SN Ia requires detailed models whose synthetic spectra can be compared to observations, and in which the solution of the radiative transfer is a key ingredient. One commonly employed method is the Feautrier scheme, which is generally very robust, but which can yield wrong results under certain conditions that frequently occur in the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3105","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BHtf8p4qXSu4WeNYEKyov2avVbujaHuX5697rHpkByx8CO4fdloHhpLX+4SFHJANrTkyFq3uoelOFn45AjEYCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T10:16:33.878373Z"},"content_sha256":"fefc64aa1b18dd91a32bb16ad8c67df9683aec364f7300bf3947e3bfd4046eb0","schema_version":"1.0","event_id":"sha256:fefc64aa1b18dd91a32bb16ad8c67df9683aec364f7300bf3947e3bfd4046eb0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY/bundle.json","state_url":"https://pith.science/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T10:16:33Z","links":{"resolver":"https://pith.science/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY","bundle":"https://pith.science/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY/bundle.json","state":"https://pith.science/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/67LJNNWHJBM4Y4K5ZSIRJCURHY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:67LJNNWHJBM4Y4K5ZSIRJCURHY","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":"52779b7e70a6f482284131b49fc65bf43ac2c0ad9805922bed55057cc95cd31a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-11T13:34:28Z","title_canon_sha256":"f34e943b215fb806d40364bec5ab9361e582892fd283d969ddd8766fd4760b7b"},"schema_version":"1.0","source":{"id":"1307.3105","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.3105","created_at":"2026-05-18T01:48:51Z"},{"alias_kind":"arxiv_version","alias_value":"1307.3105v1","created_at":"2026-05-18T01:48:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.3105","created_at":"2026-05-18T01:48:51Z"},{"alias_kind":"pith_short_12","alias_value":"67LJNNWHJBM4","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"67LJNNWHJBM4Y4K5","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"67LJNNWH","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:fefc64aa1b18dd91a32bb16ad8c67df9683aec364f7300bf3947e3bfd4046eb0","target":"graph","created_at":"2026-05-18T01:48:51Z","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":"Context. Type Ia supernovae (SN Ia) have become an invaluable cosmological tool as their exceptional brightness makes them observable even at very large distances (up to redshifts around z~1). To investigate possible systematic differences between local and distant SN Ia requires detailed models whose synthetic spectra can be compared to observations, and in which the solution of the radiative transfer is a key ingredient. One commonly employed method is the Feautrier scheme, which is generally very robust, but which can yield wrong results under certain conditions that frequently occur in the","authors_text":"A. W. A. Pauldrach, D. N. Sauer, P. J. N. Hultzsch, T. L. Hoffmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-11T13:34:28Z","title":"Non-LTE models for synthetic spectra of type Ia supernovae. IV. A modified Feautrier scheme for opacity-sampled pseudo-continua at high expansion velocities and application to synthetic SN Ia spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.3105","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:daeb693b49e2225f9180560b1f1c0261fa221d28037e987bba541d2cdc6cb3f6","target":"record","created_at":"2026-05-18T01:48:51Z","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":"52779b7e70a6f482284131b49fc65bf43ac2c0ad9805922bed55057cc95cd31a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-11T13:34:28Z","title_canon_sha256":"f34e943b215fb806d40364bec5ab9361e582892fd283d969ddd8766fd4760b7b"},"schema_version":"1.0","source":{"id":"1307.3105","kind":"arxiv","version":1}},"canonical_sha256":"f7d696b6c74859cc715dcc91148a913e2f9016c84b33a4d967155055f2e1f649","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7d696b6c74859cc715dcc91148a913e2f9016c84b33a4d967155055f2e1f649","first_computed_at":"2026-05-18T01:48:51.688977Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:51.688977Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rFTzTKj1mZotPuSvYZdD6T5asUFIwsnkySZqZq0/8g7UxMo9G4ICRjhhxL0n0nDhv6wjWbmNuRnH9ZhHh4GHDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:51.689755Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.3105","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:daeb693b49e2225f9180560b1f1c0261fa221d28037e987bba541d2cdc6cb3f6","sha256:fefc64aa1b18dd91a32bb16ad8c67df9683aec364f7300bf3947e3bfd4046eb0"],"state_sha256":"44fe5f58dc65798a22d96f636be039f9059112f1b0b4f1b1aa351427ece33d2d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RTULnMZr8FUwWzzY0Io6nc/zcJFbXp3DQ/aRvdpahYoHOlwhgmO3cDJu5ybih5MGMzJO0E9NYRyDZS8DDPghAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T10:16:33.880327Z","bundle_sha256":"1cd94db9378fc5160778fd24c8696e6b6096070ca0f64f98a23b2922a7a9174e"}}