{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:7ZYX26EJBAVYR4YHQ7KKX6U3AN","short_pith_number":"pith:7ZYX26EJ","canonical_record":{"source":{"id":"1112.4435","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-19T18:55:59Z","cross_cats_sorted":[],"title_canon_sha256":"4bb7dabbf1d939bbe0e176b04132584d83863d74f194035eb08bd7239a07926e","abstract_canon_sha256":"8a67b730012c3f399c4f9cf3dc2787fec0db603d669069e74f21e90dbeddd13e"},"schema_version":"1.0"},"canonical_sha256":"fe717d7889082b88f30787d4abfa9b03512f355ad2b87c23fd16bc02f5784bb8","source":{"kind":"arxiv","id":"1112.4435","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.4435","created_at":"2026-05-18T04:06:06Z"},{"alias_kind":"arxiv_version","alias_value":"1112.4435v1","created_at":"2026-05-18T04:06:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.4435","created_at":"2026-05-18T04:06:06Z"},{"alias_kind":"pith_short_12","alias_value":"7ZYX26EJBAVY","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7ZYX26EJBAVYR4YH","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7ZYX26EJ","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:7ZYX26EJBAVYR4YHQ7KKX6U3AN","target":"record","payload":{"canonical_record":{"source":{"id":"1112.4435","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-19T18:55:59Z","cross_cats_sorted":[],"title_canon_sha256":"4bb7dabbf1d939bbe0e176b04132584d83863d74f194035eb08bd7239a07926e","abstract_canon_sha256":"8a67b730012c3f399c4f9cf3dc2787fec0db603d669069e74f21e90dbeddd13e"},"schema_version":"1.0"},"canonical_sha256":"fe717d7889082b88f30787d4abfa9b03512f355ad2b87c23fd16bc02f5784bb8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:06:06.461367Z","signature_b64":"uH90ZEHq1iZWCfu7v/trAKoqL0hdmkmKaLJKgRI0CjqXUazWLacCAsHEhXYmF3vVDQ5RooTl4FgE6ossGoZQCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe717d7889082b88f30787d4abfa9b03512f355ad2b87c23fd16bc02f5784bb8","last_reissued_at":"2026-05-18T04:06:06.460703Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:06:06.460703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.4435","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":"2026-05-18T04:06:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"twN1dnV4lCPNYimYF/o3exABJGf9fl+Ayg9cv+x+wvEr890wX/EFYj5nCdHpyE7/w4o96GukCcnD/pPQE4mcDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T19:01:01.623823Z"},"content_sha256":"8214d9ad771c4a5aec5051dca68fbf658a8a660edf18dbf925b9845f1eab776a","schema_version":"1.0","event_id":"sha256:8214d9ad771c4a5aec5051dca68fbf658a8a660edf18dbf925b9845f1eab776a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:7ZYX26EJBAVYR4YHQ7KKX6U3AN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two Remarkable Spectroscopic Categories of Young O Stars from the VLT-FLAMES Tarantula Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(2) Astronomical Institute Anton Pannekoek, (3) Scottish Universities Physics Alliance, (4) Instituto de Astrofisica de Canarias, (5) Royal Observatory Edinburgh), Christopher J. Evans (5) ((1) Space Telescope Science Institute, Hugues Sana (2), Nolan R. Walborn (1), Sergio Simon-Diaz (4), Universidad de La Laguna, William D. Taylor (3)","submitted_at":"2011-12-19T18:55:59Z","abstract_excerpt":"The spectral and spatial characteristics of two special categories of O stars found in the VFTS dataset are presented. One of them comprises very rapid rotators, including several more extreme than any previously known. These objects are distributed around the peripheries of the main 30 Doradus clusters, suggesting a runaway nature for which their radial velocities already provide preliminary supporting evidence. The other category consists of a large number of Vz stars, previously hypothesized on spectroscopic grounds to be on or very near the ZAMS. Their distribution is the inverse of that o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.4435","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":"2026-05-18T04:06:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D1ndTlcNHgQZ6DuIE2jARkmF2I3iyyhCgGoHsMpJFVhgIwWFysV01FnF8eYVUKQlPZIwlO5PRVEqFgDlmHcOBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T19:01:01.624445Z"},"content_sha256":"ea21ae96662a121e9dc7b1aa9848c6f2ee5ad0a33122d215156e444602af57f0","schema_version":"1.0","event_id":"sha256:ea21ae96662a121e9dc7b1aa9848c6f2ee5ad0a33122d215156e444602af57f0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN/bundle.json","state_url":"https://pith.science/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN/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":"2026-06-07T19:01:01Z","links":{"resolver":"https://pith.science/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN","bundle":"https://pith.science/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN/bundle.json","state":"https://pith.science/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7ZYX26EJBAVYR4YHQ7KKX6U3AN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:7ZYX26EJBAVYR4YHQ7KKX6U3AN","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":"8a67b730012c3f399c4f9cf3dc2787fec0db603d669069e74f21e90dbeddd13e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-19T18:55:59Z","title_canon_sha256":"4bb7dabbf1d939bbe0e176b04132584d83863d74f194035eb08bd7239a07926e"},"schema_version":"1.0","source":{"id":"1112.4435","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.4435","created_at":"2026-05-18T04:06:06Z"},{"alias_kind":"arxiv_version","alias_value":"1112.4435v1","created_at":"2026-05-18T04:06:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.4435","created_at":"2026-05-18T04:06:06Z"},{"alias_kind":"pith_short_12","alias_value":"7ZYX26EJBAVY","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7ZYX26EJBAVYR4YH","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7ZYX26EJ","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:ea21ae96662a121e9dc7b1aa9848c6f2ee5ad0a33122d215156e444602af57f0","target":"graph","created_at":"2026-05-18T04:06:06Z","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 spectral and spatial characteristics of two special categories of O stars found in the VFTS dataset are presented. One of them comprises very rapid rotators, including several more extreme than any previously known. These objects are distributed around the peripheries of the main 30 Doradus clusters, suggesting a runaway nature for which their radial velocities already provide preliminary supporting evidence. The other category consists of a large number of Vz stars, previously hypothesized on spectroscopic grounds to be on or very near the ZAMS. Their distribution is the inverse of that o","authors_text":"(2) Astronomical Institute Anton Pannekoek, (3) Scottish Universities Physics Alliance, (4) Instituto de Astrofisica de Canarias, (5) Royal Observatory Edinburgh), Christopher J. Evans (5) ((1) Space Telescope Science Institute, Hugues Sana (2), Nolan R. Walborn (1), Sergio Simon-Diaz (4), Universidad de La Laguna, William D. Taylor (3)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-19T18:55:59Z","title":"Two Remarkable Spectroscopic Categories of Young O Stars from the VLT-FLAMES Tarantula Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.4435","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":"sha256:8214d9ad771c4a5aec5051dca68fbf658a8a660edf18dbf925b9845f1eab776a","target":"record","created_at":"2026-05-18T04:06:06Z","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":"8a67b730012c3f399c4f9cf3dc2787fec0db603d669069e74f21e90dbeddd13e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-19T18:55:59Z","title_canon_sha256":"4bb7dabbf1d939bbe0e176b04132584d83863d74f194035eb08bd7239a07926e"},"schema_version":"1.0","source":{"id":"1112.4435","kind":"arxiv","version":1}},"canonical_sha256":"fe717d7889082b88f30787d4abfa9b03512f355ad2b87c23fd16bc02f5784bb8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe717d7889082b88f30787d4abfa9b03512f355ad2b87c23fd16bc02f5784bb8","first_computed_at":"2026-05-18T04:06:06.460703Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:06:06.460703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uH90ZEHq1iZWCfu7v/trAKoqL0hdmkmKaLJKgRI0CjqXUazWLacCAsHEhXYmF3vVDQ5RooTl4FgE6ossGoZQCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:06:06.461367Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.4435","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8214d9ad771c4a5aec5051dca68fbf658a8a660edf18dbf925b9845f1eab776a","sha256:ea21ae96662a121e9dc7b1aa9848c6f2ee5ad0a33122d215156e444602af57f0"],"state_sha256":"87d092831d00eaed5973aacb1f6bcc73d5d39d3a44fadc529acea72e26da8757"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"orE1mkJCK9s4+vAW7ynlKikra1d3Ha7aU9hcjkKHkEurOivVMGH91ZDEgvWK7XoRoDBsdcQizhIqaTE/c5BUBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T19:01:01.628011Z","bundle_sha256":"a480b3694b1350bdd0a88df74709e3d946198b4aff010d2f0a9c3bb37d466e14"}}