{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:5V452GKVU6DW6Z4GTTGIIVSJJJ","short_pith_number":"pith:5V452GKV","canonical_record":{"source":{"id":"1106.4741","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-23T14:41:58Z","cross_cats_sorted":[],"title_canon_sha256":"2c8b2d8d0839ee6d39260019c21368fbf06b9c99acd370887a6247c4b7230511","abstract_canon_sha256":"9c144a961f58bdf19b0fd3a18be8e7625c265023ecf3d7256b61df67e99ac1b6"},"schema_version":"1.0"},"canonical_sha256":"ed79dd1955a7876f67869ccc8456494a6d5444010af211a47314cc6dc55bf548","source":{"kind":"arxiv","id":"1106.4741","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4741","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4741v2","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4741","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"pith_short_12","alias_value":"5V452GKVU6DW","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5V452GKVU6DW6Z4G","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5V452GKV","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:5V452GKVU6DW6Z4GTTGIIVSJJJ","target":"record","payload":{"canonical_record":{"source":{"id":"1106.4741","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-23T14:41:58Z","cross_cats_sorted":[],"title_canon_sha256":"2c8b2d8d0839ee6d39260019c21368fbf06b9c99acd370887a6247c4b7230511","abstract_canon_sha256":"9c144a961f58bdf19b0fd3a18be8e7625c265023ecf3d7256b61df67e99ac1b6"},"schema_version":"1.0"},"canonical_sha256":"ed79dd1955a7876f67869ccc8456494a6d5444010af211a47314cc6dc55bf548","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:31.559225Z","signature_b64":"cwaXGX8aur1i5p+XraGkWNHU5krexU6kziKJ1l93UEPWk7MCfS5zOJxIbAWzjZuZ6NWXzzbbJQC7GEPgAXBcBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed79dd1955a7876f67869ccc8456494a6d5444010af211a47314cc6dc55bf548","last_reissued_at":"2026-05-18T02:01:31.558802Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:31.558802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.4741","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:01:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0kHf+LZb56MPa4FWSvUV3IJysT29MUnN+uz5h6ONYhEFUrGOjo63FUNxfbneO7Mynbz6zvLVhRiO7Aqc6GUtCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T13:18:54.134084Z"},"content_sha256":"ae0ed539f9678e9621e851b0fb6a14b63cf465ffdb24a66f45da0cfe99fb1192","schema_version":"1.0","event_id":"sha256:ae0ed539f9678e9621e851b0fb6a14b63cf465ffdb24a66f45da0cfe99fb1192"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:5V452GKVU6DW6Z4GTTGIIVSJJJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Is the common envelope ejection efficiency a function of the binary parameters?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(2) The Open University, (3) University of Southampton), C. Knigge (3) ((1) Universit\\'e Libre de Bruxelles, P. J. Davis (1), U. Kolb (2)","submitted_at":"2011-06-23T14:41:58Z","abstract_excerpt":"We reconstruct the common envelope (CE) phase for the current sample of observed white dwarf-main sequence post-common envelope binaries (PCEBs). We apply multi-regression analysis in order to investigate whether correlations exist between the CE ejection efficiencies, alpha_CE, inferred from the sample, and the binary parameters: white dwarf mass, secondary mass, orbital period at the point the CE commences, or the orbital period immediately after the CE phase. We do this with and without consideration for the internal energy of the progenitor primary giants' envelope. Our fits should pave th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4741","kind":"arxiv","version":2},"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":"2026-05-18T02:01:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uaCdTX9t2r8Yhr5fHVQW2yNK8DE2s6UFYMbNAy6klyJRA5xS2EAAB31ritXm1dlTPiQZnYEP8TJs+/4Jdn+EAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T13:18:54.134506Z"},"content_sha256":"e7ee25d56a0a101844dc8d1be58d2aee22459e5477ed1f4ea6fa91c21049f087","schema_version":"1.0","event_id":"sha256:e7ee25d56a0a101844dc8d1be58d2aee22459e5477ed1f4ea6fa91c21049f087"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ/bundle.json","state_url":"https://pith.science/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ/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":"2026-06-05T13:18:54Z","links":{"resolver":"https://pith.science/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ","bundle":"https://pith.science/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ/bundle.json","state":"https://pith.science/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5V452GKVU6DW6Z4GTTGIIVSJJJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:5V452GKVU6DW6Z4GTTGIIVSJJJ","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":"9c144a961f58bdf19b0fd3a18be8e7625c265023ecf3d7256b61df67e99ac1b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-23T14:41:58Z","title_canon_sha256":"2c8b2d8d0839ee6d39260019c21368fbf06b9c99acd370887a6247c4b7230511"},"schema_version":"1.0","source":{"id":"1106.4741","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4741","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4741v2","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4741","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"pith_short_12","alias_value":"5V452GKVU6DW","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5V452GKVU6DW6Z4G","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5V452GKV","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:e7ee25d56a0a101844dc8d1be58d2aee22459e5477ed1f4ea6fa91c21049f087","target":"graph","created_at":"2026-05-18T02:01:31Z","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":"We reconstruct the common envelope (CE) phase for the current sample of observed white dwarf-main sequence post-common envelope binaries (PCEBs). We apply multi-regression analysis in order to investigate whether correlations exist between the CE ejection efficiencies, alpha_CE, inferred from the sample, and the binary parameters: white dwarf mass, secondary mass, orbital period at the point the CE commences, or the orbital period immediately after the CE phase. We do this with and without consideration for the internal energy of the progenitor primary giants' envelope. Our fits should pave th","authors_text":"(2) The Open University, (3) University of Southampton), C. Knigge (3) ((1) Universit\\'e Libre de Bruxelles, P. J. Davis (1), U. Kolb (2)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-23T14:41:58Z","title":"Is the common envelope ejection efficiency a function of the binary parameters?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4741","kind":"arxiv","version":2},"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:ae0ed539f9678e9621e851b0fb6a14b63cf465ffdb24a66f45da0cfe99fb1192","target":"record","created_at":"2026-05-18T02:01:31Z","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":"9c144a961f58bdf19b0fd3a18be8e7625c265023ecf3d7256b61df67e99ac1b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-23T14:41:58Z","title_canon_sha256":"2c8b2d8d0839ee6d39260019c21368fbf06b9c99acd370887a6247c4b7230511"},"schema_version":"1.0","source":{"id":"1106.4741","kind":"arxiv","version":2}},"canonical_sha256":"ed79dd1955a7876f67869ccc8456494a6d5444010af211a47314cc6dc55bf548","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed79dd1955a7876f67869ccc8456494a6d5444010af211a47314cc6dc55bf548","first_computed_at":"2026-05-18T02:01:31.558802Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:31.558802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cwaXGX8aur1i5p+XraGkWNHU5krexU6kziKJ1l93UEPWk7MCfS5zOJxIbAWzjZuZ6NWXzzbbJQC7GEPgAXBcBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:31.559225Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.4741","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae0ed539f9678e9621e851b0fb6a14b63cf465ffdb24a66f45da0cfe99fb1192","sha256:e7ee25d56a0a101844dc8d1be58d2aee22459e5477ed1f4ea6fa91c21049f087"],"state_sha256":"a696a60cff1c969386b8b6b152d1055d04abca7ceb0956681f4c135297ca6637"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NwnW5743xZYTHrojN7gbq/47DasXOLJcnVJ2vIDBgrKHmrtofQp1UW0AVXjQIGNWb3b68AEpkJewkiqhWVF1DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T13:18:54.136486Z","bundle_sha256":"0b422695cff69fdd229d9df8ef96f709328162c995d17a099a05e7e76569f9f6"}}