{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:KBYESWGOYF7J6XLTAZMWLGM3FR","short_pith_number":"pith:KBYESWGO","canonical_record":{"source":{"id":"1908.02500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-07T09:39:03Z","cross_cats_sorted":[],"title_canon_sha256":"64caec6c92caccccd3ce6602edd1dafd93d91e979fbd58a4a41e46153f8dbd55","abstract_canon_sha256":"3d0345de1b2c32f97f7cebc0c17b6f97d97e3e71d75e7df9fd2a8cd8a541e5bd"},"schema_version":"1.0"},"canonical_sha256":"50704958cec17e9f5d73065965999b2c469b8b82629f6ff986205c52c7f4741b","source":{"kind":"arxiv","id":"1908.02500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02500","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02500v1","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02500","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"pith_short_12","alias_value":"KBYESWGOYF7J","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"pith_short_16","alias_value":"KBYESWGOYF7J6XLT","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"pith_short_8","alias_value":"KBYESWGO","created_at":"2026-07-04T23:58:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:KBYESWGOYF7J6XLTAZMWLGM3FR","target":"record","payload":{"canonical_record":{"source":{"id":"1908.02500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-07T09:39:03Z","cross_cats_sorted":[],"title_canon_sha256":"64caec6c92caccccd3ce6602edd1dafd93d91e979fbd58a4a41e46153f8dbd55","abstract_canon_sha256":"3d0345de1b2c32f97f7cebc0c17b6f97d97e3e71d75e7df9fd2a8cd8a541e5bd"},"schema_version":"1.0"},"canonical_sha256":"50704958cec17e9f5d73065965999b2c469b8b82629f6ff986205c52c7f4741b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:53.394623Z","signature_b64":"4VWSZKhg5W+QjwdAG/OBdjr+LTiSZpbEqA8Wi3qC8WSMzMh2qi+46xXlb5vblt5uWleq6nDuKF60pV3JRz+pDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"50704958cec17e9f5d73065965999b2c469b8b82629f6ff986205c52c7f4741b","last_reissued_at":"2026-07-04T23:58:53.394292Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:53.394292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.02500","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":"2026-07-04T23:58:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ixnla+ZhNWdv0aGNAD/DiWDYabac27Na4TbSBLU5Qp70HA4LMdOplsWmVpAh4yxQWZyBEnfho725R7r95dqYCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T11:30:16.806691Z"},"content_sha256":"b4cf1a2a1ba005acbd64ec3f32c826c28e71ff2006ddb8e3ffe254c4e5f2d799","schema_version":"1.0","event_id":"sha256:b4cf1a2a1ba005acbd64ec3f32c826c28e71ff2006ddb8e3ffe254c4e5f2d799"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:KBYESWGOYF7J6XLTAZMWLGM3FR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"EC 22536-5304: SALT identifies a new lead-rich intermediate helium subdwarf","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Brent Miszalski, C. Simon Jeffery","submitted_at":"2019-08-07T09:39:03Z","abstract_excerpt":"SALT spectra of the helium-rich hot subdwarf EC22536-5304 show strong absorption lines of triply-ionized lead. Analysis of the HRS spectrum and a follow-up SALT/RSS spectrum show EC22536-5304 to have surface properties (temperature, gravity, helium/hydrogen ratio) similar to other heavy-metal subdwarfs. With a lead overabundance of 4.8 dex relative to solar, EC22536-5304 is the most lead-rich intermediate helium subdwarf discovered so far."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02500","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/1908.02500/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":"2026-07-04T23:58:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UVoTBKGdlOWX/t5vZOrRdJhLnQrE2cjmnAcdHn8wNv3qkubVLTmM7bSvZ9Lf2rmXGChv7o3tWHblel3+v3HdAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T11:30:16.807203Z"},"content_sha256":"27dfef5b7a949bc33f729c2045f75ba75cf6be2da0b62896564387fe91428aec","schema_version":"1.0","event_id":"sha256:27dfef5b7a949bc33f729c2045f75ba75cf6be2da0b62896564387fe91428aec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KBYESWGOYF7J6XLTAZMWLGM3FR/bundle.json","state_url":"https://pith.science/pith/KBYESWGOYF7J6XLTAZMWLGM3FR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KBYESWGOYF7J6XLTAZMWLGM3FR/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":"2026-08-16T11:30:16Z","links":{"resolver":"https://pith.science/pith/KBYESWGOYF7J6XLTAZMWLGM3FR","bundle":"https://pith.science/pith/KBYESWGOYF7J6XLTAZMWLGM3FR/bundle.json","state":"https://pith.science/pith/KBYESWGOYF7J6XLTAZMWLGM3FR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KBYESWGOYF7J6XLTAZMWLGM3FR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KBYESWGOYF7J6XLTAZMWLGM3FR","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":"3d0345de1b2c32f97f7cebc0c17b6f97d97e3e71d75e7df9fd2a8cd8a541e5bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-07T09:39:03Z","title_canon_sha256":"64caec6c92caccccd3ce6602edd1dafd93d91e979fbd58a4a41e46153f8dbd55"},"schema_version":"1.0","source":{"id":"1908.02500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02500","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02500v1","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02500","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"pith_short_12","alias_value":"KBYESWGOYF7J","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"pith_short_16","alias_value":"KBYESWGOYF7J6XLT","created_at":"2026-07-04T23:58:53Z"},{"alias_kind":"pith_short_8","alias_value":"KBYESWGO","created_at":"2026-07-04T23:58:53Z"}],"graph_snapshots":[{"event_id":"sha256:27dfef5b7a949bc33f729c2045f75ba75cf6be2da0b62896564387fe91428aec","target":"graph","created_at":"2026-07-04T23:58:53Z","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/1908.02500/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"SALT spectra of the helium-rich hot subdwarf EC22536-5304 show strong absorption lines of triply-ionized lead. Analysis of the HRS spectrum and a follow-up SALT/RSS spectrum show EC22536-5304 to have surface properties (temperature, gravity, helium/hydrogen ratio) similar to other heavy-metal subdwarfs. With a lead overabundance of 4.8 dex relative to solar, EC22536-5304 is the most lead-rich intermediate helium subdwarf discovered so far.","authors_text":"Brent Miszalski, C. Simon Jeffery","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-07T09:39:03Z","title":"EC 22536-5304: SALT identifies a new lead-rich intermediate helium subdwarf"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02500","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:b4cf1a2a1ba005acbd64ec3f32c826c28e71ff2006ddb8e3ffe254c4e5f2d799","target":"record","created_at":"2026-07-04T23:58:53Z","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":"3d0345de1b2c32f97f7cebc0c17b6f97d97e3e71d75e7df9fd2a8cd8a541e5bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-07T09:39:03Z","title_canon_sha256":"64caec6c92caccccd3ce6602edd1dafd93d91e979fbd58a4a41e46153f8dbd55"},"schema_version":"1.0","source":{"id":"1908.02500","kind":"arxiv","version":1}},"canonical_sha256":"50704958cec17e9f5d73065965999b2c469b8b82629f6ff986205c52c7f4741b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50704958cec17e9f5d73065965999b2c469b8b82629f6ff986205c52c7f4741b","first_computed_at":"2026-07-04T23:58:53.394292Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:53.394292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4VWSZKhg5W+QjwdAG/OBdjr+LTiSZpbEqA8Wi3qC8WSMzMh2qi+46xXlb5vblt5uWleq6nDuKF60pV3JRz+pDA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:53.394623Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.02500","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b4cf1a2a1ba005acbd64ec3f32c826c28e71ff2006ddb8e3ffe254c4e5f2d799","sha256:27dfef5b7a949bc33f729c2045f75ba75cf6be2da0b62896564387fe91428aec"],"state_sha256":"ef66d1b630fc45d60d7b91bec504d13238d002a3bc55c12c0ee59c4eab1665bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s2TJiCWBkh+7cNG64lcTsbKGi3AYLyHSKjOkOnwlOuXyj6e/GGLZXLl7KdHxYlEKmavzD2Jsioy+3BY7gwK/BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T11:30:16.811994Z","bundle_sha256":"ba9fa2a0646eb404e0b1fce92b4b8cffb156948de15925dd074d2b4806683d11"}}