{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:BBWN5RVAXMA5GI4Y36Z4KT5XUZ","short_pith_number":"pith:BBWN5RVA","canonical_record":{"source":{"id":"1512.04986","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-15T22:02:46Z","cross_cats_sorted":[],"title_canon_sha256":"ec61b481003ea97f9cfb11bddd128b7d33a5e4b0666c8244b404abc890f1ab7b","abstract_canon_sha256":"297da5e8815586879fb5ad31e53a325549ae06fd2cea93e665b9ec46e86a115c"},"schema_version":"1.0"},"canonical_sha256":"086cdec6a0bb01d32398dfb3c54fb7a676d28286c8f402e78749e90ace8690df","source":{"kind":"arxiv","id":"1512.04986","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.04986","created_at":"2026-05-18T01:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"1512.04986v1","created_at":"2026-05-18T01:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04986","created_at":"2026-05-18T01:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"BBWN5RVAXMA5","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BBWN5RVAXMA5GI4Y","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BBWN5RVA","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:BBWN5RVAXMA5GI4Y36Z4KT5XUZ","target":"record","payload":{"canonical_record":{"source":{"id":"1512.04986","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-15T22:02:46Z","cross_cats_sorted":[],"title_canon_sha256":"ec61b481003ea97f9cfb11bddd128b7d33a5e4b0666c8244b404abc890f1ab7b","abstract_canon_sha256":"297da5e8815586879fb5ad31e53a325549ae06fd2cea93e665b9ec46e86a115c"},"schema_version":"1.0"},"canonical_sha256":"086cdec6a0bb01d32398dfb3c54fb7a676d28286c8f402e78749e90ace8690df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:50.934521Z","signature_b64":"sYtVLpz2IZHbJY1KNMlYqlSprFSP3nc+FYTx7XgJ/wFMz2fstAgrr6DJYdUcGDLoxmoETlGFrI5zn90u5qOUAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"086cdec6a0bb01d32398dfb3c54fb7a676d28286c8f402e78749e90ace8690df","last_reissued_at":"2026-05-18T01:21:50.933900Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:50.933900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.04986","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":"2026-05-18T01:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PobIWR3WvZxqffcXPHj0OjtuhsQrEQ5ITGiq8lSRhQpZbyIE2+OC5LJW3arTKZv4ATMkjX2uMTkY7MmxJOf5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:06:08.458406Z"},"content_sha256":"9facfd9b671edf651a144927c43f7eb2670993a23841321592e1dd2418ef09af","schema_version":"1.0","event_id":"sha256:9facfd9b671edf651a144927c43f7eb2670993a23841321592e1dd2418ef09af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:BBWN5RVAXMA5GI4Y36Z4KT5XUZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hot bubbles of planetary nebulae with hydrogen-deficient winds I. Heat conduction in a chemically stratified plasma","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"2) ((1) Leibniz-Institut f\\\"ur Astrophysik Potsdam (AIP), (2) Institut f\\\"ur Physik und Astronomie, Christer Sandin (1), Detlef Sch\\\"onberner (1), Matthias Steffen (1), Universit\\\"at Potsdam), Ute R\\\"uhling (1","submitted_at":"2015-12-15T22:02:46Z","abstract_excerpt":"Heat conduction has been found a plausible solution to explain discrepancies between expected and measured temperatures in hot bubbles of planetary nebulae (PNe). While the heat conduction process depends on the chemical composition, to date it has been exclusively studied for pure hydrogen plasmas in PNe. A smaller population of PNe show hydrogen-deficient and helium- and carbon-enriched surfaces surrounded by bubbles of the same composition; considerable differences are expected in physical properties of these objects in comparison to the pure hydrogen case. The aim of this study is to explo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04986","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":"2026-05-18T01:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4EijlIHmlC+WqL177f4AXJLwRkjL2IPD4QunPjuH8HJyIIDhF88V6wcQRb/XCZgEVRMKw1BgXF3fz1ggyUUuDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:06:08.458757Z"},"content_sha256":"5a50dc75ccc51c7459c824b0f5d4de37fff351bbd0cb2962fad3cea5f9599bf0","schema_version":"1.0","event_id":"sha256:5a50dc75ccc51c7459c824b0f5d4de37fff351bbd0cb2962fad3cea5f9599bf0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ/bundle.json","state_url":"https://pith.science/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ/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":"2026-06-02T08:06:08Z","links":{"resolver":"https://pith.science/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ","bundle":"https://pith.science/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ/bundle.json","state":"https://pith.science/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BBWN5RVAXMA5GI4Y36Z4KT5XUZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BBWN5RVAXMA5GI4Y36Z4KT5XUZ","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":"297da5e8815586879fb5ad31e53a325549ae06fd2cea93e665b9ec46e86a115c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-15T22:02:46Z","title_canon_sha256":"ec61b481003ea97f9cfb11bddd128b7d33a5e4b0666c8244b404abc890f1ab7b"},"schema_version":"1.0","source":{"id":"1512.04986","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.04986","created_at":"2026-05-18T01:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"1512.04986v1","created_at":"2026-05-18T01:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04986","created_at":"2026-05-18T01:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"BBWN5RVAXMA5","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BBWN5RVAXMA5GI4Y","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BBWN5RVA","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:5a50dc75ccc51c7459c824b0f5d4de37fff351bbd0cb2962fad3cea5f9599bf0","target":"graph","created_at":"2026-05-18T01:21:50Z","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":"Heat conduction has been found a plausible solution to explain discrepancies between expected and measured temperatures in hot bubbles of planetary nebulae (PNe). While the heat conduction process depends on the chemical composition, to date it has been exclusively studied for pure hydrogen plasmas in PNe. A smaller population of PNe show hydrogen-deficient and helium- and carbon-enriched surfaces surrounded by bubbles of the same composition; considerable differences are expected in physical properties of these objects in comparison to the pure hydrogen case. The aim of this study is to explo","authors_text":"2) ((1) Leibniz-Institut f\\\"ur Astrophysik Potsdam (AIP), (2) Institut f\\\"ur Physik und Astronomie, Christer Sandin (1), Detlef Sch\\\"onberner (1), Matthias Steffen (1), Universit\\\"at Potsdam), Ute R\\\"uhling (1","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-15T22:02:46Z","title":"Hot bubbles of planetary nebulae with hydrogen-deficient winds I. Heat conduction in a chemically stratified plasma"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04986","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":"sha256:9facfd9b671edf651a144927c43f7eb2670993a23841321592e1dd2418ef09af","target":"record","created_at":"2026-05-18T01:21:50Z","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":"297da5e8815586879fb5ad31e53a325549ae06fd2cea93e665b9ec46e86a115c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-15T22:02:46Z","title_canon_sha256":"ec61b481003ea97f9cfb11bddd128b7d33a5e4b0666c8244b404abc890f1ab7b"},"schema_version":"1.0","source":{"id":"1512.04986","kind":"arxiv","version":1}},"canonical_sha256":"086cdec6a0bb01d32398dfb3c54fb7a676d28286c8f402e78749e90ace8690df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"086cdec6a0bb01d32398dfb3c54fb7a676d28286c8f402e78749e90ace8690df","first_computed_at":"2026-05-18T01:21:50.933900Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:50.933900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sYtVLpz2IZHbJY1KNMlYqlSprFSP3nc+FYTx7XgJ/wFMz2fstAgrr6DJYdUcGDLoxmoETlGFrI5zn90u5qOUAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:50.934521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.04986","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9facfd9b671edf651a144927c43f7eb2670993a23841321592e1dd2418ef09af","sha256:5a50dc75ccc51c7459c824b0f5d4de37fff351bbd0cb2962fad3cea5f9599bf0"],"state_sha256":"d2c57be94b43c815f237048479ff393a4876089e198160e82ff0866c59e99b71"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HPitJORRYOCJR2JGfnRghzdeyE9sqTucWMdbEGzxnM5iXblcTRC5pDQPDzGx0E1Sy5csnFWreihTpc0ARTpQDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T08:06:08.460778Z","bundle_sha256":"44ee59bbe874b9278f7991b0be7ed5e36acd97ac07d092065290108993a266fc"}}