{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:C7K4MP5XSYAUHG5O7XZTXLISSV","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":"735353dc436bb339d23cea27a63ebf04f963e12e682c9e5e9e97600915e1f517","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-03T18:00:07Z","title_canon_sha256":"a0e2ba4d96cf7e9df1358de5e8c53b71989f3e69784e9c89fd517743eaf26b35"},"schema_version":"1.0","source":{"id":"1707.00700","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.00700","created_at":"2026-05-18T00:38:25Z"},{"alias_kind":"arxiv_version","alias_value":"1707.00700v1","created_at":"2026-05-18T00:38:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.00700","created_at":"2026-05-18T00:38:25Z"},{"alias_kind":"pith_short_12","alias_value":"C7K4MP5XSYAU","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_16","alias_value":"C7K4MP5XSYAUHG5O","created_at":"2026-05-18T12:31:10Z"},{"alias_kind":"pith_short_8","alias_value":"C7K4MP5X","created_at":"2026-05-18T12:31:10Z"}],"graph_snapshots":[{"event_id":"sha256:0d03e4374ee4731e120f6ae59c526fae27b231f2097e03de0117a0a94d7be9ee","target":"graph","created_at":"2026-05-18T00:38:25Z","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":"In studies on intermediate- and high-resolution spectra of Type Ia supernovae (SNe Ia), some objects exhibit narrow Na-I D absorptions often blueshifted with respect to the rest wavelength within the host galaxy. The absence of these in other SNe Ia may reflect that the explosions have different progenitors: blueshifted Na-I D features might be explained by the outflows of 'single-degenerate' systems (binaries of a white dwarf with a non-degenerate companion). In this work, we search for systematic differences among SNe Ia for which the Na-I D characteristics have been clearly established in p","authors_text":"Avishay Gal-Yam, Chris Ashall, Cosimo Inserra, David Young, Friedrich K. Roepke, Heather Campbell, Kate Maguire, Laura Greggio, Mark Sullivan, Matteo Miluzio, Nancy Elias-Rosa, Paolo A. Mazzali, Stefan Taubenberger, Stephan Hachinger, Stephen J. Smartt, Ulrich Feindt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-03T18:00:07Z","title":"Type Ia supernovae with and without blueshifted narrow Na I D lines - how different is their structure?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.00700","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":"sha256:4fee66da34e2af75d7bf3cbbf033258732cd13d74ae9a8c727e51d82b666e8ea","target":"record","created_at":"2026-05-18T00:38:25Z","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":"735353dc436bb339d23cea27a63ebf04f963e12e682c9e5e9e97600915e1f517","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-03T18:00:07Z","title_canon_sha256":"a0e2ba4d96cf7e9df1358de5e8c53b71989f3e69784e9c89fd517743eaf26b35"},"schema_version":"1.0","source":{"id":"1707.00700","kind":"arxiv","version":1}},"canonical_sha256":"17d5c63fb79601439baefdf33bad1295630cb613e5c78bcb6eb90a244e4ede03","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17d5c63fb79601439baefdf33bad1295630cb613e5c78bcb6eb90a244e4ede03","first_computed_at":"2026-05-18T00:38:25.468622Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:38:25.468622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dCrRUVTrFvaTD7sXqFoEj8XQGlHsUr7ksBqjpJLMlyeZOeJs49oEBlvBp9Kk4r/PbEs1aC31h3Z0EpwO5MXqAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:38:25.469389Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.00700","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fee66da34e2af75d7bf3cbbf033258732cd13d74ae9a8c727e51d82b666e8ea","sha256:0d03e4374ee4731e120f6ae59c526fae27b231f2097e03de0117a0a94d7be9ee"],"state_sha256":"1bbb4f840a9b850ed71c7c6f1f57d0b2648c048e4d40362f6c19790b49205b61"}