{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:D5FD3LWRCBWKBQ57KHMGKQ65XN","short_pith_number":"pith:D5FD3LWR","canonical_record":{"source":{"id":"2202.04671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-02-09T19:00:09Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"f5d86e5ad036a7d983b36bf04913df074adb18d85b839b05b7a346c8f8f26f20","abstract_canon_sha256":"0651f7d474b6435c75ce78db0910eace4566f873b7c1ae37398fcc8fdab15a41"},"schema_version":"1.0"},"canonical_sha256":"1f4a3daed1106ca0c3bf51d86543ddbb424043073c711ae2d8c1548701eb05fa","source":{"kind":"arxiv","id":"2202.04671","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.04671","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"arxiv_version","alias_value":"2202.04671v1","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.04671","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"pith_short_12","alias_value":"D5FD3LWRCBWK","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"pith_short_16","alias_value":"D5FD3LWRCBWKBQ57","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"pith_short_8","alias_value":"D5FD3LWR","created_at":"2026-07-05T05:22:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:D5FD3LWRCBWKBQ57KHMGKQ65XN","target":"record","payload":{"canonical_record":{"source":{"id":"2202.04671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-02-09T19:00:09Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"f5d86e5ad036a7d983b36bf04913df074adb18d85b839b05b7a346c8f8f26f20","abstract_canon_sha256":"0651f7d474b6435c75ce78db0910eace4566f873b7c1ae37398fcc8fdab15a41"},"schema_version":"1.0"},"canonical_sha256":"1f4a3daed1106ca0c3bf51d86543ddbb424043073c711ae2d8c1548701eb05fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:22:43.818659Z","signature_b64":"9wY4yS9Icv4BTWdpolVpSdVPqSeBoXWW6A4wQYH9LpETHLdOHcPrA3vTQwKSvDZFqyoBv9eHnA6/fl+fNyRaBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f4a3daed1106ca0c3bf51d86543ddbb424043073c711ae2d8c1548701eb05fa","last_reissued_at":"2026-07-05T05:22:43.818090Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:22:43.818090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2202.04671","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":"2026-07-05T05:22:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gpsqCPGQr/jTV7S6omdnJ/BFA0W7OxawWWqsq40r9dUtPOraM23QwbHtj9Usr5ISc+bTfQ07j2CybinYJdCPBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T08:48:26.689943Z"},"content_sha256":"22b108db8e537a8030193346338a344baa481fdb6ea4e5e424c19e3854c46e0f","schema_version":"1.0","event_id":"sha256:22b108db8e537a8030193346338a344baa481fdb6ea4e5e424c19e3854c46e0f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:D5FD3LWRCBWKBQ57KHMGKQ65XN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The origin and impact of Wolf-Rayet-type mass loss","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Andreas A.C. Sander, Erin R. Higgins, Helge Todt, Jorick S. Vink, Tomer Shenar, Wolf-Rainer Hamann","submitted_at":"2022-02-09T19:00:09Z","abstract_excerpt":"Classical Wolf-Rayet (WR) stars mark an important stage in the late evolution of massive stars. As hydrogen-poor massive stars, these objects have lost their outer layers, while still losing further mass through strong winds indicated by their prominent emission line spectra. Wolf-Rayet stars have been detected in a variety of different galaxies. Their strong winds are a major ingredient of stellar evolution and population synthesis models. Yet, a coherent theoretical picture of their strong mass-loss is only starting to emerge. In particular, the occurrence of WR stars as a function of metall"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.04671","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2202.04671/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:22:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7sA9pdpDSABLod4kmUkX76cQchYvcO/sRYOx+S3G1N0TrCYXJsyRVfV891pD5xFf0VB3ceWr+h1e1OrQcl7uCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T08:48:26.690329Z"},"content_sha256":"2b236d8e6ff1be4af2f341f83427147ed45de6ec953a1c7d0b0ffa4a47eebadf","schema_version":"1.0","event_id":"sha256:2b236d8e6ff1be4af2f341f83427147ed45de6ec953a1c7d0b0ffa4a47eebadf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN/bundle.json","state_url":"https://pith.science/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN/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":"2026-07-07T08:48:26Z","links":{"resolver":"https://pith.science/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN","bundle":"https://pith.science/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN/bundle.json","state":"https://pith.science/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D5FD3LWRCBWKBQ57KHMGKQ65XN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:D5FD3LWRCBWKBQ57KHMGKQ65XN","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":"0651f7d474b6435c75ce78db0910eace4566f873b7c1ae37398fcc8fdab15a41","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-02-09T19:00:09Z","title_canon_sha256":"f5d86e5ad036a7d983b36bf04913df074adb18d85b839b05b7a346c8f8f26f20"},"schema_version":"1.0","source":{"id":"2202.04671","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.04671","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"arxiv_version","alias_value":"2202.04671v1","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.04671","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"pith_short_12","alias_value":"D5FD3LWRCBWK","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"pith_short_16","alias_value":"D5FD3LWRCBWKBQ57","created_at":"2026-07-05T05:22:43Z"},{"alias_kind":"pith_short_8","alias_value":"D5FD3LWR","created_at":"2026-07-05T05:22:43Z"}],"graph_snapshots":[{"event_id":"sha256:2b236d8e6ff1be4af2f341f83427147ed45de6ec953a1c7d0b0ffa4a47eebadf","target":"graph","created_at":"2026-07-05T05:22:43Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2202.04671/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Classical Wolf-Rayet (WR) stars mark an important stage in the late evolution of massive stars. As hydrogen-poor massive stars, these objects have lost their outer layers, while still losing further mass through strong winds indicated by their prominent emission line spectra. Wolf-Rayet stars have been detected in a variety of different galaxies. Their strong winds are a major ingredient of stellar evolution and population synthesis models. Yet, a coherent theoretical picture of their strong mass-loss is only starting to emerge. In particular, the occurrence of WR stars as a function of metall","authors_text":"Andreas A.C. Sander, Erin R. Higgins, Helge Todt, Jorick S. Vink, Tomer Shenar, Wolf-Rainer Hamann","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-02-09T19:00:09Z","title":"The origin and impact of Wolf-Rayet-type mass loss"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.04671","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":"sha256:22b108db8e537a8030193346338a344baa481fdb6ea4e5e424c19e3854c46e0f","target":"record","created_at":"2026-07-05T05:22:43Z","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":"0651f7d474b6435c75ce78db0910eace4566f873b7c1ae37398fcc8fdab15a41","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-02-09T19:00:09Z","title_canon_sha256":"f5d86e5ad036a7d983b36bf04913df074adb18d85b839b05b7a346c8f8f26f20"},"schema_version":"1.0","source":{"id":"2202.04671","kind":"arxiv","version":1}},"canonical_sha256":"1f4a3daed1106ca0c3bf51d86543ddbb424043073c711ae2d8c1548701eb05fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f4a3daed1106ca0c3bf51d86543ddbb424043073c711ae2d8c1548701eb05fa","first_computed_at":"2026-07-05T05:22:43.818090Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:22:43.818090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9wY4yS9Icv4BTWdpolVpSdVPqSeBoXWW6A4wQYH9LpETHLdOHcPrA3vTQwKSvDZFqyoBv9eHnA6/fl+fNyRaBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:22:43.818659Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.04671","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22b108db8e537a8030193346338a344baa481fdb6ea4e5e424c19e3854c46e0f","sha256:2b236d8e6ff1be4af2f341f83427147ed45de6ec953a1c7d0b0ffa4a47eebadf"],"state_sha256":"0374b8ca21727b9ceb5ce7f8d79f09583a3ef474cf9c9a39554f4bf1efbb0da9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q3SI4+a85+WF+aun2gqk2o0v9ZPXBuZ388lg5z3Hy9OwHIioO1KGXlJXrGr3pF8E/P/18MBAX/t17thd4RXRBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T08:48:26.692242Z","bundle_sha256":"f2ab1f1d7b90caee7904431a9a2480b15d11fe072eec8823103a86f1af552cf5"}}