{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZQWTLX4RYADJJ7EUZZ6Z3MKKQY","short_pith_number":"pith:ZQWTLX4R","canonical_record":{"source":{"id":"1606.04921","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-06-15T19:31:09Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"0c99451427e155665a4c144308b69b6a49987d6b8ef63fbfdf601a1d0bcfd2d0","abstract_canon_sha256":"50026d7a417563f2b3b07d522cb524727469201e2d1db50c39bbd67442175e85"},"schema_version":"1.0"},"canonical_sha256":"cc2d35df91c00694fc94ce7d9db14a8633fb0f52b819579f8342e7ec1f4f855c","source":{"kind":"arxiv","id":"1606.04921","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.04921","created_at":"2026-05-18T00:54:36Z"},{"alias_kind":"arxiv_version","alias_value":"1606.04921v1","created_at":"2026-05-18T00:54:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.04921","created_at":"2026-05-18T00:54:36Z"},{"alias_kind":"pith_short_12","alias_value":"ZQWTLX4RYADJ","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZQWTLX4RYADJJ7EU","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZQWTLX4R","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZQWTLX4RYADJJ7EUZZ6Z3MKKQY","target":"record","payload":{"canonical_record":{"source":{"id":"1606.04921","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-06-15T19:31:09Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"0c99451427e155665a4c144308b69b6a49987d6b8ef63fbfdf601a1d0bcfd2d0","abstract_canon_sha256":"50026d7a417563f2b3b07d522cb524727469201e2d1db50c39bbd67442175e85"},"schema_version":"1.0"},"canonical_sha256":"cc2d35df91c00694fc94ce7d9db14a8633fb0f52b819579f8342e7ec1f4f855c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:36.077764Z","signature_b64":"QCy74q2hTcABuLvbK8++s9RzkQy+XnpeSWfLo/eZZqeqH1pw1mxiHjQGq/vXfetmq8J8LGvHo59HUitI9SSvBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc2d35df91c00694fc94ce7d9db14a8633fb0f52b819579f8342e7ec1f4f855c","last_reissued_at":"2026-05-18T00:54:36.077134Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:36.077134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.04921","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":"2026-05-18T00:54:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MpXgXjL08vr3Gpvu/zTuwWustn/SN7GoxRsy9I0yzqhGDCRtIObhO/+gM7CsRBOQs6A5HrOiqsim2bjU55FOBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T18:43:19.554184Z"},"content_sha256":"9d6e93118f089526b8a9f7e26c7e7e9d9b5bcca4508f53d2e7eb5dd7b8c2e079","schema_version":"1.0","event_id":"sha256:9d6e93118f089526b8a9f7e26c7e7e9d9b5bcca4508f53d2e7eb5dd7b8c2e079"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZQWTLX4RYADJJ7EUZZ6Z3MKKQY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stability of mass transfer from massive giants: double black-hole binary formation and ultra-luminous X-ray sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"K. Belczynski, K. Pavlovskii, K.X. Van, N. Ivanova","submitted_at":"2016-06-15T19:31:09Z","abstract_excerpt":"The mass transfer in binaries with massive donors and compact companions, when the donors rapidly evolve after their main sequence, is one of the dominant formation channels of merging double stellar-mass black hole binaries. This mass transfer was previously postulated to be unstable and was expected to lead to a common envelope event. The common envelope event then would end with either double black hole formation, or with the merger of the two stars. We re-visit the stability of this mass transfer, and find that for a large range of the binary orbital separations this mass transfer is stabl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.04921","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":"2026-05-18T00:54:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o3hz/dRS5K4C74qS3w6pzpwF6UyT9BU3htbn2fb9uPcbGjfdOa4YwQ3itHLOcVFh5vdxfH1+FB+8pQgWe1w0Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T18:43:19.554602Z"},"content_sha256":"9bfc493af593656a4e83264ace24c412cdc16bd9db22bd729454d33e49109f1d","schema_version":"1.0","event_id":"sha256:9bfc493af593656a4e83264ace24c412cdc16bd9db22bd729454d33e49109f1d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY/bundle.json","state_url":"https://pith.science/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY/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":"2026-05-27T18:43:19Z","links":{"resolver":"https://pith.science/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY","bundle":"https://pith.science/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY/bundle.json","state":"https://pith.science/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZQWTLX4RYADJJ7EUZZ6Z3MKKQY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZQWTLX4RYADJJ7EUZZ6Z3MKKQY","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":"50026d7a417563f2b3b07d522cb524727469201e2d1db50c39bbd67442175e85","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-06-15T19:31:09Z","title_canon_sha256":"0c99451427e155665a4c144308b69b6a49987d6b8ef63fbfdf601a1d0bcfd2d0"},"schema_version":"1.0","source":{"id":"1606.04921","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.04921","created_at":"2026-05-18T00:54:36Z"},{"alias_kind":"arxiv_version","alias_value":"1606.04921v1","created_at":"2026-05-18T00:54:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.04921","created_at":"2026-05-18T00:54:36Z"},{"alias_kind":"pith_short_12","alias_value":"ZQWTLX4RYADJ","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZQWTLX4RYADJJ7EU","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZQWTLX4R","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:9bfc493af593656a4e83264ace24c412cdc16bd9db22bd729454d33e49109f1d","target":"graph","created_at":"2026-05-18T00:54:36Z","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":"The mass transfer in binaries with massive donors and compact companions, when the donors rapidly evolve after their main sequence, is one of the dominant formation channels of merging double stellar-mass black hole binaries. This mass transfer was previously postulated to be unstable and was expected to lead to a common envelope event. The common envelope event then would end with either double black hole formation, or with the merger of the two stars. We re-visit the stability of this mass transfer, and find that for a large range of the binary orbital separations this mass transfer is stabl","authors_text":"K. Belczynski, K. Pavlovskii, K.X. Van, N. Ivanova","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-06-15T19:31:09Z","title":"Stability of mass transfer from massive giants: double black-hole binary formation and ultra-luminous X-ray sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.04921","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":"sha256:9d6e93118f089526b8a9f7e26c7e7e9d9b5bcca4508f53d2e7eb5dd7b8c2e079","target":"record","created_at":"2026-05-18T00:54:36Z","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":"50026d7a417563f2b3b07d522cb524727469201e2d1db50c39bbd67442175e85","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-06-15T19:31:09Z","title_canon_sha256":"0c99451427e155665a4c144308b69b6a49987d6b8ef63fbfdf601a1d0bcfd2d0"},"schema_version":"1.0","source":{"id":"1606.04921","kind":"arxiv","version":1}},"canonical_sha256":"cc2d35df91c00694fc94ce7d9db14a8633fb0f52b819579f8342e7ec1f4f855c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc2d35df91c00694fc94ce7d9db14a8633fb0f52b819579f8342e7ec1f4f855c","first_computed_at":"2026-05-18T00:54:36.077134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:36.077134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QCy74q2hTcABuLvbK8++s9RzkQy+XnpeSWfLo/eZZqeqH1pw1mxiHjQGq/vXfetmq8J8LGvHo59HUitI9SSvBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:36.077764Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.04921","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9d6e93118f089526b8a9f7e26c7e7e9d9b5bcca4508f53d2e7eb5dd7b8c2e079","sha256:9bfc493af593656a4e83264ace24c412cdc16bd9db22bd729454d33e49109f1d"],"state_sha256":"dfe1ac957c58b88f0c1e682a22baf64c82c020f36492d0c4d3c0bb0eee15ce2f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e2V/5rp76IMi9UuGS6G/nqj5Ai8kaBidYuJ/9lNh+WMiEMMSdsTALl3xazAhW8s5AE3RZl6a2K2rqOQmdACtBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T18:43:19.557968Z","bundle_sha256":"29f4b01f304489843bbbc55a628f5d1592dfec696639f645055378dfe640ac66"}}