{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:LHKTC2LLC26O7B7NSUN3AY4KFK","short_pith_number":"pith:LHKTC2LL","canonical_record":{"source":{"id":"1012.5222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-12-23T15:05:41Z","cross_cats_sorted":[],"title_canon_sha256":"4214254a1eb6dfb0fa6a008a952c3a1ca50b3de1dfa3742a54f21a261129661a","abstract_canon_sha256":"696a39a0f8a7d0057389f24eabfab6466372debd44d139fc446ae8a55cc6fed0"},"schema_version":"1.0"},"canonical_sha256":"59d531696b16bcef87ed951bb0638a2a8ea32ef7900f16d6b6912cea9526a6c6","source":{"kind":"arxiv","id":"1012.5222","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.5222","created_at":"2026-05-18T02:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"1012.5222v1","created_at":"2026-05-18T02:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.5222","created_at":"2026-05-18T02:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"LHKTC2LLC26O","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"LHKTC2LLC26O7B7N","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"LHKTC2LL","created_at":"2026-05-18T12:26:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:LHKTC2LLC26O7B7NSUN3AY4KFK","target":"record","payload":{"canonical_record":{"source":{"id":"1012.5222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-12-23T15:05:41Z","cross_cats_sorted":[],"title_canon_sha256":"4214254a1eb6dfb0fa6a008a952c3a1ca50b3de1dfa3742a54f21a261129661a","abstract_canon_sha256":"696a39a0f8a7d0057389f24eabfab6466372debd44d139fc446ae8a55cc6fed0"},"schema_version":"1.0"},"canonical_sha256":"59d531696b16bcef87ed951bb0638a2a8ea32ef7900f16d6b6912cea9526a6c6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:18.095478Z","signature_b64":"Q2ofZXcwSpDGn09alz8zudwh+XlbppBM0dNUVNQky7AX92M4PW2ba2jRauydoFHs2QefG7lA4t1REL7V2i2HBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59d531696b16bcef87ed951bb0638a2a8ea32ef7900f16d6b6912cea9526a6c6","last_reissued_at":"2026-05-18T02:04:18.094542Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:18.094542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.5222","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":"2026-05-18T02:04:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tPbmlW0/TXG0cq986zb2YDtb2gOcpFlgirKFY7RiD9xjIzNLRKJ6XQLC2Ki6dLhpA17M2VcVbxqSqZSsrICoAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:02:41.491417Z"},"content_sha256":"396a8c728e0147aeca12c7b4ff3b1feda8a9638efe95685657363c677afbfa7d","schema_version":"1.0","event_id":"sha256:396a8c728e0147aeca12c7b4ff3b1feda8a9638efe95685657363c677afbfa7d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:LHKTC2LLC26O7B7NSUN3AY4KFK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HST/COS Spectroscopy of H1504+65","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Klaus Werner, Thomas Rauch","submitted_at":"2010-12-23T15:05:41Z","abstract_excerpt":"We present new ultraviolet spectra of the peculiar white dwarf (WD) H1504+65, obtained with COS on HST. H1504+65 is the hottest known WD (Teff= 200,000 K) and has an atmosphere mainly composed of C and O, augmented with high amounts of Ne and Mg. This object is unique and the origin of its surface chemistry is completely unclear. We probably see the naked core of either a C--O WD or even a O--Ne--Mg WD. In the latter case, this would be the first direct proof that such WDs can be the outcome of single-star evolution. The new observations were performed to shed light on the origin of this myste"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5222","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":"2026-05-18T02:04:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q1+yLNydOa3eTVI95KydHhRZJfeUITT3AFzXX0RMpSpdhu6iH+froyxelj77+wqJJJhPU+Rbdx4XQyTIoPTWBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:02:41.492110Z"},"content_sha256":"d07aa191a57fa305fb9bc853e243c05710a5a058dcf2967cb5418d9328187cb9","schema_version":"1.0","event_id":"sha256:d07aa191a57fa305fb9bc853e243c05710a5a058dcf2967cb5418d9328187cb9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LHKTC2LLC26O7B7NSUN3AY4KFK/bundle.json","state_url":"https://pith.science/pith/LHKTC2LLC26O7B7NSUN3AY4KFK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LHKTC2LLC26O7B7NSUN3AY4KFK/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":"2026-06-01T02:02:41Z","links":{"resolver":"https://pith.science/pith/LHKTC2LLC26O7B7NSUN3AY4KFK","bundle":"https://pith.science/pith/LHKTC2LLC26O7B7NSUN3AY4KFK/bundle.json","state":"https://pith.science/pith/LHKTC2LLC26O7B7NSUN3AY4KFK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LHKTC2LLC26O7B7NSUN3AY4KFK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:LHKTC2LLC26O7B7NSUN3AY4KFK","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":"696a39a0f8a7d0057389f24eabfab6466372debd44d139fc446ae8a55cc6fed0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-12-23T15:05:41Z","title_canon_sha256":"4214254a1eb6dfb0fa6a008a952c3a1ca50b3de1dfa3742a54f21a261129661a"},"schema_version":"1.0","source":{"id":"1012.5222","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.5222","created_at":"2026-05-18T02:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"1012.5222v1","created_at":"2026-05-18T02:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.5222","created_at":"2026-05-18T02:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"LHKTC2LLC26O","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"LHKTC2LLC26O7B7N","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"LHKTC2LL","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:d07aa191a57fa305fb9bc853e243c05710a5a058dcf2967cb5418d9328187cb9","target":"graph","created_at":"2026-05-18T02:04:18Z","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":"We present new ultraviolet spectra of the peculiar white dwarf (WD) H1504+65, obtained with COS on HST. H1504+65 is the hottest known WD (Teff= 200,000 K) and has an atmosphere mainly composed of C and O, augmented with high amounts of Ne and Mg. This object is unique and the origin of its surface chemistry is completely unclear. We probably see the naked core of either a C--O WD or even a O--Ne--Mg WD. In the latter case, this would be the first direct proof that such WDs can be the outcome of single-star evolution. The new observations were performed to shed light on the origin of this myste","authors_text":"Klaus Werner, Thomas Rauch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-12-23T15:05:41Z","title":"HST/COS Spectroscopy of H1504+65"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5222","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":"sha256:396a8c728e0147aeca12c7b4ff3b1feda8a9638efe95685657363c677afbfa7d","target":"record","created_at":"2026-05-18T02:04:18Z","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":"696a39a0f8a7d0057389f24eabfab6466372debd44d139fc446ae8a55cc6fed0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-12-23T15:05:41Z","title_canon_sha256":"4214254a1eb6dfb0fa6a008a952c3a1ca50b3de1dfa3742a54f21a261129661a"},"schema_version":"1.0","source":{"id":"1012.5222","kind":"arxiv","version":1}},"canonical_sha256":"59d531696b16bcef87ed951bb0638a2a8ea32ef7900f16d6b6912cea9526a6c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59d531696b16bcef87ed951bb0638a2a8ea32ef7900f16d6b6912cea9526a6c6","first_computed_at":"2026-05-18T02:04:18.094542Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:18.094542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q2ofZXcwSpDGn09alz8zudwh+XlbppBM0dNUVNQky7AX92M4PW2ba2jRauydoFHs2QefG7lA4t1REL7V2i2HBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:18.095478Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.5222","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:396a8c728e0147aeca12c7b4ff3b1feda8a9638efe95685657363c677afbfa7d","sha256:d07aa191a57fa305fb9bc853e243c05710a5a058dcf2967cb5418d9328187cb9"],"state_sha256":"c9e72d6a70bd092202f6bf773b53d2969abf2b8c7b2587081497bc7cded0972c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wBa9BQ0csRfPJAu+0M080I5MSEd5BWhldES1k7lOts2TPB0PN6sSGNnzSbop0RH8NvSfvvqiPpZyQVf5isurAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T02:02:41.496339Z","bundle_sha256":"887e4ec964e342c35dfbe8d34a2651a97127b29661921e36358549d5d8294cfa"}}