{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:VUYP2UMIQOIQWE6W7DZHER3DVP","short_pith_number":"pith:VUYP2UMI","canonical_record":{"source":{"id":"1507.02286","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-08T20:00:43Z","cross_cats_sorted":[],"title_canon_sha256":"93d0acfb77f9c08571791776a206e6c3c638d52062b39f162c822c908041179b","abstract_canon_sha256":"cb47290817e31990e12f0fd6561d58255c3a32959839ba981e550897fb7f657d"},"schema_version":"1.0"},"canonical_sha256":"ad30fd518883910b13d6f8f2724763abf9a3e920c021281f89471b3ae01dc038","source":{"kind":"arxiv","id":"1507.02286","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02286","created_at":"2026-05-18T01:35:29Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02286v1","created_at":"2026-05-18T01:35:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02286","created_at":"2026-05-18T01:35:29Z"},{"alias_kind":"pith_short_12","alias_value":"VUYP2UMIQOIQ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VUYP2UMIQOIQWE6W","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VUYP2UMI","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:VUYP2UMIQOIQWE6W7DZHER3DVP","target":"record","payload":{"canonical_record":{"source":{"id":"1507.02286","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-08T20:00:43Z","cross_cats_sorted":[],"title_canon_sha256":"93d0acfb77f9c08571791776a206e6c3c638d52062b39f162c822c908041179b","abstract_canon_sha256":"cb47290817e31990e12f0fd6561d58255c3a32959839ba981e550897fb7f657d"},"schema_version":"1.0"},"canonical_sha256":"ad30fd518883910b13d6f8f2724763abf9a3e920c021281f89471b3ae01dc038","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:29.606805Z","signature_b64":"hH7yoGraQLLhtp2r9hucf3OYnFinLMPZdkbij/2I8ah2oJGci6CayaG/FVvVufnoUdkD9/z50EGM5u1s2LpcAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad30fd518883910b13d6f8f2724763abf9a3e920c021281f89471b3ae01dc038","last_reissued_at":"2026-05-18T01:35:29.606291Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:29.606291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.02286","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":"2026-05-18T01:35:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MfJ94x/twiuL1ffJ/nPRgiTM0r9uYUeAFYTDaTD7YxQFEKQai0Qwc5U1iszQnqqg5kXD2iYBfevzq1RDAkOlDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:35:21.444284Z"},"content_sha256":"1c88fd0f54f0f74ced0dcd100331049beecccf86a896c6bae352990e7c7d8e4c","schema_version":"1.0","event_id":"sha256:1c88fd0f54f0f74ced0dcd100331049beecccf86a896c6bae352990e7c7d8e4c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:VUYP2UMIQOIQWE6W7DZHER3DVP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The VLT-FLAMES Tarantula Survey XXI. Stellar spin rates of O-type spectroscopic binaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. de Koter, C.J. Evans, F. Tramper, G. Gr\\\"afener, H. Sana, J.S. Vink, N. Langer, O.H. Ram\\'irez-Agudelo, P.L. Dufton, S.E. de Mink, V. H\\'enault-Brunet, W.D. Taylor","submitted_at":"2015-07-08T20:00:43Z","abstract_excerpt":"The initial distribution of spin rates of massive stars is a fingerprint of their elusive formation process. It also sets a key initial condition for stellar evolution and is thus an important ingredient in stellar population synthesis. So far, most studies have focused on single stars. Most O stars are however found in multiple systems. By establishing the spin-rate distribution of a sizeable sample of O-type spectroscopic binaries and by comparing the distributions of binary sub-populations with one another as well as with that of presumed single stars in the same region, we aim to constrain"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02286","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":"2026-05-18T01:35:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RcFDtjlZLbgd1ycVU8h0x8JKX4sA/la6MZVHFVhTRex59H7SKt/nMBOcFCTskjRhwVVT0utm7GWJKivr7r+/DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:35:21.444661Z"},"content_sha256":"3fe325f48b49a62ad8b8ce22d51989967065ced2db58e682504e5e9de3d33549","schema_version":"1.0","event_id":"sha256:3fe325f48b49a62ad8b8ce22d51989967065ced2db58e682504e5e9de3d33549"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VUYP2UMIQOIQWE6W7DZHER3DVP/bundle.json","state_url":"https://pith.science/pith/VUYP2UMIQOIQWE6W7DZHER3DVP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VUYP2UMIQOIQWE6W7DZHER3DVP/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":"2026-05-27T16:35:21Z","links":{"resolver":"https://pith.science/pith/VUYP2UMIQOIQWE6W7DZHER3DVP","bundle":"https://pith.science/pith/VUYP2UMIQOIQWE6W7DZHER3DVP/bundle.json","state":"https://pith.science/pith/VUYP2UMIQOIQWE6W7DZHER3DVP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VUYP2UMIQOIQWE6W7DZHER3DVP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:VUYP2UMIQOIQWE6W7DZHER3DVP","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":"cb47290817e31990e12f0fd6561d58255c3a32959839ba981e550897fb7f657d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-08T20:00:43Z","title_canon_sha256":"93d0acfb77f9c08571791776a206e6c3c638d52062b39f162c822c908041179b"},"schema_version":"1.0","source":{"id":"1507.02286","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.02286","created_at":"2026-05-18T01:35:29Z"},{"alias_kind":"arxiv_version","alias_value":"1507.02286v1","created_at":"2026-05-18T01:35:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02286","created_at":"2026-05-18T01:35:29Z"},{"alias_kind":"pith_short_12","alias_value":"VUYP2UMIQOIQ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"VUYP2UMIQOIQWE6W","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"VUYP2UMI","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:3fe325f48b49a62ad8b8ce22d51989967065ced2db58e682504e5e9de3d33549","target":"graph","created_at":"2026-05-18T01:35:29Z","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 initial distribution of spin rates of massive stars is a fingerprint of their elusive formation process. It also sets a key initial condition for stellar evolution and is thus an important ingredient in stellar population synthesis. So far, most studies have focused on single stars. Most O stars are however found in multiple systems. By establishing the spin-rate distribution of a sizeable sample of O-type spectroscopic binaries and by comparing the distributions of binary sub-populations with one another as well as with that of presumed single stars in the same region, we aim to constrain","authors_text":"A. de Koter, C.J. Evans, F. Tramper, G. Gr\\\"afener, H. Sana, J.S. Vink, N. Langer, O.H. Ram\\'irez-Agudelo, P.L. Dufton, S.E. de Mink, V. H\\'enault-Brunet, W.D. Taylor","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-08T20:00:43Z","title":"The VLT-FLAMES Tarantula Survey XXI. Stellar spin rates of O-type spectroscopic binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02286","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":"sha256:1c88fd0f54f0f74ced0dcd100331049beecccf86a896c6bae352990e7c7d8e4c","target":"record","created_at":"2026-05-18T01:35:29Z","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":"cb47290817e31990e12f0fd6561d58255c3a32959839ba981e550897fb7f657d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-08T20:00:43Z","title_canon_sha256":"93d0acfb77f9c08571791776a206e6c3c638d52062b39f162c822c908041179b"},"schema_version":"1.0","source":{"id":"1507.02286","kind":"arxiv","version":1}},"canonical_sha256":"ad30fd518883910b13d6f8f2724763abf9a3e920c021281f89471b3ae01dc038","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad30fd518883910b13d6f8f2724763abf9a3e920c021281f89471b3ae01dc038","first_computed_at":"2026-05-18T01:35:29.606291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:29.606291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hH7yoGraQLLhtp2r9hucf3OYnFinLMPZdkbij/2I8ah2oJGci6CayaG/FVvVufnoUdkD9/z50EGM5u1s2LpcAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:29.606805Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.02286","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c88fd0f54f0f74ced0dcd100331049beecccf86a896c6bae352990e7c7d8e4c","sha256:3fe325f48b49a62ad8b8ce22d51989967065ced2db58e682504e5e9de3d33549"],"state_sha256":"2eb9fde8e00780436ba8e9af42f02ae1c7ca2cb73ae679ab54445734e255325a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eNnTR4Z2C1Qo8LDteTVKWJPCWTFrfwFXO2X/1Lbg9jSae8LKvu1ZaMDrhtKcYIwf3EmV+fTSy27bhnFTYbG/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:35:21.447801Z","bundle_sha256":"256926dc564764793b6e26e0dcf1ad270e4a9af8f4e77b615fdb2184c026c225"}}