{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:YZJEJRNG2T5BZZVWDOGLUNJCGC","short_pith_number":"pith:YZJEJRNG","canonical_record":{"source":{"id":"1809.07158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-09-19T13:04:25Z","cross_cats_sorted":[],"title_canon_sha256":"a6950d10f27eb70b2440bdeabe9f972a298fd5c50fb0d1ae4d0221792dad2863","abstract_canon_sha256":"64b0f86b844d58a07f900d9a36e7a4e85a42115d1438a7170c103232d1e7feee"},"schema_version":"1.0"},"canonical_sha256":"c65244c5a6d4fa1ce6b61b8cba3522308e2e245a99ef0f43df451ab9cd06860b","source":{"kind":"arxiv","id":"1809.07158","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07158","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07158v1","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07158","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"YZJEJRNG2T5B","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YZJEJRNG2T5BZZVW","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YZJEJRNG","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:YZJEJRNG2T5BZZVWDOGLUNJCGC","target":"record","payload":{"canonical_record":{"source":{"id":"1809.07158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-09-19T13:04:25Z","cross_cats_sorted":[],"title_canon_sha256":"a6950d10f27eb70b2440bdeabe9f972a298fd5c50fb0d1ae4d0221792dad2863","abstract_canon_sha256":"64b0f86b844d58a07f900d9a36e7a4e85a42115d1438a7170c103232d1e7feee"},"schema_version":"1.0"},"canonical_sha256":"c65244c5a6d4fa1ce6b61b8cba3522308e2e245a99ef0f43df451ab9cd06860b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:50.001366Z","signature_b64":"tlbxZHGvSGkzXEMnIvOWu1MDHDR26vFC1hrpatRZAI0tr1k5buyo97SoOzmGCm8YInX3bO5zdC4kEbLW3dkGCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c65244c5a6d4fa1ce6b61b8cba3522308e2e245a99ef0f43df451ab9cd06860b","last_reissued_at":"2026-05-18T00:00:50.000923Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:50.000923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.07158","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":"2026-05-18T00:00:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lDwLC+AGleCsF2U+yJd1WksAhV9ua/5gzBUE4MwKThHn7FaQTzUrl08WJi592da+S4b2Yr3Ml2z4LTVoguG9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:21:54.131485Z"},"content_sha256":"b140b9343079233c29655734dd751258909af31ef28a6714d9806bbccc13b9b2","schema_version":"1.0","event_id":"sha256:b140b9343079233c29655734dd751258909af31ef28a6714d9806bbccc13b9b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:YZJEJRNG2T5BZZVWDOGLUNJCGC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Where are the double-degenerate progenitors of type Ia supernovae?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Rebassa-Mansergas, S. Toonen, S. Torres, V. Korol","submitted_at":"2018-09-19T13:04:25Z","abstract_excerpt":"Double white dwarf binaries with merger timescales smaller than the Hubble time and with a total mass near the Chandrasekhar limit (i.e. classical Chandrasekhar population) or with high-mass primaries (i.e. sub-Chandrasekhar population) are potential supernova type Ia (SNIa) progenitors. However, we have not yet unambiguously confirmed the existence of these objects observationally, a fact that has been often used to criticise the relevance of double white dwarfs for producing SNIa. We analyse whether this lack of detections is due to observational effects. To that end we simulate the double w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07158","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":"2026-05-18T00:00:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bR8+KycoTCr+ub+XvnHZNT5ZQb1XUxGpTZgjiJmJUWeVFI0iMBNSu7z0KQdNWTmecjvWctP9ndYCAQR1DNfSCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:21:54.132218Z"},"content_sha256":"3617b5f201dfa1d8071b80944e39756d74d8d5bfd08ce939495f851b0986977a","schema_version":"1.0","event_id":"sha256:3617b5f201dfa1d8071b80944e39756d74d8d5bfd08ce939495f851b0986977a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC/bundle.json","state_url":"https://pith.science/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC/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":"2026-06-05T12:21:54Z","links":{"resolver":"https://pith.science/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC","bundle":"https://pith.science/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC/bundle.json","state":"https://pith.science/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YZJEJRNG2T5BZZVWDOGLUNJCGC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YZJEJRNG2T5BZZVWDOGLUNJCGC","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":"64b0f86b844d58a07f900d9a36e7a4e85a42115d1438a7170c103232d1e7feee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-09-19T13:04:25Z","title_canon_sha256":"a6950d10f27eb70b2440bdeabe9f972a298fd5c50fb0d1ae4d0221792dad2863"},"schema_version":"1.0","source":{"id":"1809.07158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07158","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07158v1","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07158","created_at":"2026-05-18T00:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"YZJEJRNG2T5B","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YZJEJRNG2T5BZZVW","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YZJEJRNG","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:3617b5f201dfa1d8071b80944e39756d74d8d5bfd08ce939495f851b0986977a","target":"graph","created_at":"2026-05-18T00:00:50Z","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":"Double white dwarf binaries with merger timescales smaller than the Hubble time and with a total mass near the Chandrasekhar limit (i.e. classical Chandrasekhar population) or with high-mass primaries (i.e. sub-Chandrasekhar population) are potential supernova type Ia (SNIa) progenitors. However, we have not yet unambiguously confirmed the existence of these objects observationally, a fact that has been often used to criticise the relevance of double white dwarfs for producing SNIa. We analyse whether this lack of detections is due to observational effects. To that end we simulate the double w","authors_text":"A. Rebassa-Mansergas, S. Toonen, S. Torres, V. Korol","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-09-19T13:04:25Z","title":"Where are the double-degenerate progenitors of type Ia supernovae?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07158","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:b140b9343079233c29655734dd751258909af31ef28a6714d9806bbccc13b9b2","target":"record","created_at":"2026-05-18T00:00:50Z","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":"64b0f86b844d58a07f900d9a36e7a4e85a42115d1438a7170c103232d1e7feee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-09-19T13:04:25Z","title_canon_sha256":"a6950d10f27eb70b2440bdeabe9f972a298fd5c50fb0d1ae4d0221792dad2863"},"schema_version":"1.0","source":{"id":"1809.07158","kind":"arxiv","version":1}},"canonical_sha256":"c65244c5a6d4fa1ce6b61b8cba3522308e2e245a99ef0f43df451ab9cd06860b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c65244c5a6d4fa1ce6b61b8cba3522308e2e245a99ef0f43df451ab9cd06860b","first_computed_at":"2026-05-18T00:00:50.000923Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:50.000923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tlbxZHGvSGkzXEMnIvOWu1MDHDR26vFC1hrpatRZAI0tr1k5buyo97SoOzmGCm8YInX3bO5zdC4kEbLW3dkGCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:50.001366Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.07158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b140b9343079233c29655734dd751258909af31ef28a6714d9806bbccc13b9b2","sha256:3617b5f201dfa1d8071b80944e39756d74d8d5bfd08ce939495f851b0986977a"],"state_sha256":"3540ce2f10ea6df9a964fc089bf8fb57d2892597831c078fe241b534cb0440c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kqt1dYL3CQEK9unxMaNfyn5bpjhB/NZwfVUVbhSjuf+Odd/6ItmkG2QSzfQ1J3+xDD2zXsBXus1RZ5IJ+lD2Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:21:54.136546Z","bundle_sha256":"0bf54b904deaccb741b02442868740825a11f52d19d1304367422d08a41b8ec3"}}