{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:BXSNCCFYOPKUYZU2LJRXKBQRKJ","short_pith_number":"pith:BXSNCCFY","canonical_record":{"source":{"id":"1308.4193","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-20T00:02:08Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"bfa2aa0a9d4699ab43fca75eaf0c497d6823d1b8829bed4e31fdf7100bef12f9","abstract_canon_sha256":"93b28cc1d1690d9a877f04984bf2c2e8ab675f42a8afe4520f887ad67f130a3d"},"schema_version":"1.0"},"canonical_sha256":"0de4d108b873d54c669a5a6375061152465a3406fbc38bbe843088241d42a86c","source":{"kind":"arxiv","id":"1308.4193","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.4193","created_at":"2026-05-18T01:48:13Z"},{"alias_kind":"arxiv_version","alias_value":"1308.4193v1","created_at":"2026-05-18T01:48:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.4193","created_at":"2026-05-18T01:48:13Z"},{"alias_kind":"pith_short_12","alias_value":"BXSNCCFYOPKU","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"BXSNCCFYOPKUYZU2","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"BXSNCCFY","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:BXSNCCFYOPKUYZU2LJRXKBQRKJ","target":"record","payload":{"canonical_record":{"source":{"id":"1308.4193","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-20T00:02:08Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"bfa2aa0a9d4699ab43fca75eaf0c497d6823d1b8829bed4e31fdf7100bef12f9","abstract_canon_sha256":"93b28cc1d1690d9a877f04984bf2c2e8ab675f42a8afe4520f887ad67f130a3d"},"schema_version":"1.0"},"canonical_sha256":"0de4d108b873d54c669a5a6375061152465a3406fbc38bbe843088241d42a86c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:13.632382Z","signature_b64":"87kpAuJNFncSpsGWI88jZEs6mqNErDRcq4coQ+m42rGLpPNdJuU87Mg4oiIPRGz1/WuAWjipRoJ5cxivCOmLAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0de4d108b873d54c669a5a6375061152465a3406fbc38bbe843088241d42a86c","last_reissued_at":"2026-05-18T01:48:13.631593Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:13.631593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.4193","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":"2026-05-18T01:48:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+oZjuc7DuHn29R9nkspDPgiuJe5kNSZDsNtXD6X5nSOttg7LScjg7xv3mNfulJH5cbZvpA3jI1C/1ueTgUM0Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T09:15:49.068412Z"},"content_sha256":"02a53a0e959030edef933d8903f0c56cc5adc79237975f4c884d8e3e02fe969a","schema_version":"1.0","event_id":"sha256:02a53a0e959030edef933d8903f0c56cc5adc79237975f4c884d8e3e02fe969a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:BXSNCCFYOPKUYZU2LJRXKBQRKJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Effects of Curvature and Expansion on Helium Detonations on White Dwarf Surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Dean Townsley, Kevin Moore, Lars Bildsten","submitted_at":"2013-08-20T00:02:08Z","abstract_excerpt":"Accreted helium layers on white dwarfs have been highlighted for many decades as a possible site for a detonation triggered by a thermonuclear runaway. In this paper, we find the minimum helium layer thickness that will sustain a steady laterally propagating detonation and show that it depends on the density and composition of the helium layer, specifically C12 and O16. Detonations in these thin helium layers have speeds slower than the Chapman-Jouget (CJ) speed from complete helium burning, v_cj=1.5e9 cm/s. Though gravitationally unbound, the ashes still have unburned helium (~ 80% in the thi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.4193","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":"2026-05-18T01:48:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BeKMYyK3zHSlApEMoZGk9pFMMXNPb2zRCjsv4HCwGNn04MiAgn67d3/Grfp6e56AxDwULULCr3AfeLzuW2JyAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T09:15:49.069132Z"},"content_sha256":"66b205ff66181fcb104beba52cfb3e7d48816a869deec1b3091e649ddb22e6bd","schema_version":"1.0","event_id":"sha256:66b205ff66181fcb104beba52cfb3e7d48816a869deec1b3091e649ddb22e6bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ/bundle.json","state_url":"https://pith.science/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ/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":"2026-06-09T09:15:49Z","links":{"resolver":"https://pith.science/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ","bundle":"https://pith.science/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ/bundle.json","state":"https://pith.science/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BXSNCCFYOPKUYZU2LJRXKBQRKJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:BXSNCCFYOPKUYZU2LJRXKBQRKJ","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":"93b28cc1d1690d9a877f04984bf2c2e8ab675f42a8afe4520f887ad67f130a3d","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-20T00:02:08Z","title_canon_sha256":"bfa2aa0a9d4699ab43fca75eaf0c497d6823d1b8829bed4e31fdf7100bef12f9"},"schema_version":"1.0","source":{"id":"1308.4193","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.4193","created_at":"2026-05-18T01:48:13Z"},{"alias_kind":"arxiv_version","alias_value":"1308.4193v1","created_at":"2026-05-18T01:48:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.4193","created_at":"2026-05-18T01:48:13Z"},{"alias_kind":"pith_short_12","alias_value":"BXSNCCFYOPKU","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"BXSNCCFYOPKUYZU2","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"BXSNCCFY","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:66b205ff66181fcb104beba52cfb3e7d48816a869deec1b3091e649ddb22e6bd","target":"graph","created_at":"2026-05-18T01:48:13Z","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":"Accreted helium layers on white dwarfs have been highlighted for many decades as a possible site for a detonation triggered by a thermonuclear runaway. In this paper, we find the minimum helium layer thickness that will sustain a steady laterally propagating detonation and show that it depends on the density and composition of the helium layer, specifically C12 and O16. Detonations in these thin helium layers have speeds slower than the Chapman-Jouget (CJ) speed from complete helium burning, v_cj=1.5e9 cm/s. Though gravitationally unbound, the ashes still have unburned helium (~ 80% in the thi","authors_text":"Dean Townsley, Kevin Moore, Lars Bildsten","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-20T00:02:08Z","title":"The Effects of Curvature and Expansion on Helium Detonations on White Dwarf Surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.4193","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":"sha256:02a53a0e959030edef933d8903f0c56cc5adc79237975f4c884d8e3e02fe969a","target":"record","created_at":"2026-05-18T01:48:13Z","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":"93b28cc1d1690d9a877f04984bf2c2e8ab675f42a8afe4520f887ad67f130a3d","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-20T00:02:08Z","title_canon_sha256":"bfa2aa0a9d4699ab43fca75eaf0c497d6823d1b8829bed4e31fdf7100bef12f9"},"schema_version":"1.0","source":{"id":"1308.4193","kind":"arxiv","version":1}},"canonical_sha256":"0de4d108b873d54c669a5a6375061152465a3406fbc38bbe843088241d42a86c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0de4d108b873d54c669a5a6375061152465a3406fbc38bbe843088241d42a86c","first_computed_at":"2026-05-18T01:48:13.631593Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:13.631593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"87kpAuJNFncSpsGWI88jZEs6mqNErDRcq4coQ+m42rGLpPNdJuU87Mg4oiIPRGz1/WuAWjipRoJ5cxivCOmLAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:13.632382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.4193","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02a53a0e959030edef933d8903f0c56cc5adc79237975f4c884d8e3e02fe969a","sha256:66b205ff66181fcb104beba52cfb3e7d48816a869deec1b3091e649ddb22e6bd"],"state_sha256":"fb402fe1631df434d7bff5daa99d9a30319113ada5db65480fe9afef3ec58045"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tTlXMxuUZOvcPc+cUbwXAqsHORIwXMgAlbwk5zbK0uTuB0Mgrt9bLEK8RvuGw5r4bseU/zB+E2HH0Ycd0lyADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T09:15:49.073335Z","bundle_sha256":"8abd962f84940518800ec94c4ac5569961434e0f35b7cc8c28db2c9a4e39894f"}}