{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RDYBNEDXZNVTHMOI7XND4QFKJG","short_pith_number":"pith:RDYBNEDX","canonical_record":{"source":{"id":"1907.07049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-16T15:05:31Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"4a0aa182426806eeb374a794eb746c4d99529e8bb5547b21495e2ff1a66d5a8d","abstract_canon_sha256":"6ee228a47f5fe8156ff2727852d9842d2ecffe496e7ef4702fc47ffc584f28c9"},"schema_version":"1.0"},"canonical_sha256":"88f0169077cb6b33b1c8fdda3e40aa499f2c6021cc624b36ab5116791975656c","source":{"kind":"arxiv","id":"1907.07049","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07049","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07049v1","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07049","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"RDYBNEDXZNVT","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"pith_short_16","alias_value":"RDYBNEDXZNVTHMOI","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"pith_short_8","alias_value":"RDYBNEDX","created_at":"2026-07-04T23:50:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RDYBNEDXZNVTHMOI7XND4QFKJG","target":"record","payload":{"canonical_record":{"source":{"id":"1907.07049","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-16T15:05:31Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"4a0aa182426806eeb374a794eb746c4d99529e8bb5547b21495e2ff1a66d5a8d","abstract_canon_sha256":"6ee228a47f5fe8156ff2727852d9842d2ecffe496e7ef4702fc47ffc584f28c9"},"schema_version":"1.0"},"canonical_sha256":"88f0169077cb6b33b1c8fdda3e40aa499f2c6021cc624b36ab5116791975656c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:50:21.154267Z","signature_b64":"67Q9U1HiTPErKFiS5fc4YPU3DtDFPe2H5je87NgqtWmJVEuWxs9JOEg9lFo3ZmFXTREb1dHMGbyvOL0dpbl/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"88f0169077cb6b33b1c8fdda3e40aa499f2c6021cc624b36ab5116791975656c","last_reissued_at":"2026-07-04T23:50:21.153935Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:50:21.153935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.07049","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":"2026-07-04T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7twmqud0Q3AkyTpQTI/UppER65KAQNHGqMbDbTpf8u565dzhNQF2bETqRUHDhfx4mrefhcobUc+uViJr0rkyBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T15:24:25.732188Z"},"content_sha256":"25a60dda7d28c96d0d4019fc6a307783f1e0d2a46580952398473fdf06b35683","schema_version":"1.0","event_id":"sha256:25a60dda7d28c96d0d4019fc6a307783f1e0d2a46580952398473fdf06b35683"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RDYBNEDXZNVTHMOI7XND4QFKJG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral analysis of the hybrid PG 1159-type central stars of the planetary nebulae Abell 43 and NGC 7094","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"F. Friederich, H. Todt, J. W. Kruk, K. Werner, L. L\\\"obling, M. M. Miller Bertolami, M. Ziegler, T. Rauch","submitted_at":"2019-07-16T15:05:31Z","abstract_excerpt":"Stellar post asymptotic giant branch (post-AGB) evolution can be completely altered by a final thermal pulse (FTP) which may occur when the star is still leaving the AGB (AFTP), at the departure from the AGB at still constant luminosity (late TP, LTP) or after the entry to the white-dwarf cooling sequence (very late TP, VLTP). Then convection mixes the He-rich material with the H-rich envelope. According to stellar evolution models the result is a star with a surface composition of $\\mathrm{H}\\approx\\,20\\,$% by mass (AFTP), $\\approx 1\\,$% (LTP), or (almost) no H (VLTP). Since FTP stars exhibit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07049","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/1907.07049/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":"2026-07-04T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iFcoNYC/kcQFoQZ/kwvGsD+LyQDlESU1/UQ5QJ81WL6TNenmsM5xdcRHYYPk5+W79vAVr6HF4XUiakWQVMzVCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T15:24:25.732705Z"},"content_sha256":"ac284d486ffc88555094a67e25645f2990bfa76ac058a97a32356fa22e230225","schema_version":"1.0","event_id":"sha256:ac284d486ffc88555094a67e25645f2990bfa76ac058a97a32356fa22e230225"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RDYBNEDXZNVTHMOI7XND4QFKJG/bundle.json","state_url":"https://pith.science/pith/RDYBNEDXZNVTHMOI7XND4QFKJG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RDYBNEDXZNVTHMOI7XND4QFKJG/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":"2026-08-21T15:24:25Z","links":{"resolver":"https://pith.science/pith/RDYBNEDXZNVTHMOI7XND4QFKJG","bundle":"https://pith.science/pith/RDYBNEDXZNVTHMOI7XND4QFKJG/bundle.json","state":"https://pith.science/pith/RDYBNEDXZNVTHMOI7XND4QFKJG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RDYBNEDXZNVTHMOI7XND4QFKJG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RDYBNEDXZNVTHMOI7XND4QFKJG","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":"6ee228a47f5fe8156ff2727852d9842d2ecffe496e7ef4702fc47ffc584f28c9","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-16T15:05:31Z","title_canon_sha256":"4a0aa182426806eeb374a794eb746c4d99529e8bb5547b21495e2ff1a66d5a8d"},"schema_version":"1.0","source":{"id":"1907.07049","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07049","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07049v1","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07049","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"RDYBNEDXZNVT","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"pith_short_16","alias_value":"RDYBNEDXZNVTHMOI","created_at":"2026-07-04T23:50:21Z"},{"alias_kind":"pith_short_8","alias_value":"RDYBNEDX","created_at":"2026-07-04T23:50:21Z"}],"graph_snapshots":[{"event_id":"sha256:ac284d486ffc88555094a67e25645f2990bfa76ac058a97a32356fa22e230225","target":"graph","created_at":"2026-07-04T23:50:21Z","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/1907.07049/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Stellar post asymptotic giant branch (post-AGB) evolution can be completely altered by a final thermal pulse (FTP) which may occur when the star is still leaving the AGB (AFTP), at the departure from the AGB at still constant luminosity (late TP, LTP) or after the entry to the white-dwarf cooling sequence (very late TP, VLTP). Then convection mixes the He-rich material with the H-rich envelope. According to stellar evolution models the result is a star with a surface composition of $\\mathrm{H}\\approx\\,20\\,$% by mass (AFTP), $\\approx 1\\,$% (LTP), or (almost) no H (VLTP). Since FTP stars exhibit","authors_text":"F. Friederich, H. Todt, J. W. Kruk, K. Werner, L. L\\\"obling, M. M. Miller Bertolami, M. Ziegler, T. Rauch","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-16T15:05:31Z","title":"Spectral analysis of the hybrid PG 1159-type central stars of the planetary nebulae Abell 43 and NGC 7094"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07049","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":"sha256:25a60dda7d28c96d0d4019fc6a307783f1e0d2a46580952398473fdf06b35683","target":"record","created_at":"2026-07-04T23:50:21Z","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":"6ee228a47f5fe8156ff2727852d9842d2ecffe496e7ef4702fc47ffc584f28c9","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-16T15:05:31Z","title_canon_sha256":"4a0aa182426806eeb374a794eb746c4d99529e8bb5547b21495e2ff1a66d5a8d"},"schema_version":"1.0","source":{"id":"1907.07049","kind":"arxiv","version":1}},"canonical_sha256":"88f0169077cb6b33b1c8fdda3e40aa499f2c6021cc624b36ab5116791975656c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"88f0169077cb6b33b1c8fdda3e40aa499f2c6021cc624b36ab5116791975656c","first_computed_at":"2026-07-04T23:50:21.153935Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:50:21.153935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"67Q9U1HiTPErKFiS5fc4YPU3DtDFPe2H5je87NgqtWmJVEuWxs9JOEg9lFo3ZmFXTREb1dHMGbyvOL0dpbl/Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:50:21.154267Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.07049","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25a60dda7d28c96d0d4019fc6a307783f1e0d2a46580952398473fdf06b35683","sha256:ac284d486ffc88555094a67e25645f2990bfa76ac058a97a32356fa22e230225"],"state_sha256":"6013a4315b35eb207f14725377b5d93cd4c4c35bfc47b7970a90d35e32d9dba9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ls2Lw6LyXo+9vB5g6N+8ikIZo1sicAOdIz0E4LuEIEwiSC0x/vIgaVwUgqw2H+/1fAZHQZXZOlaMiyo0PbI3AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T15:24:25.737207Z","bundle_sha256":"87c8c3691d667e45a27dd2cac825895ab654a6d094c0cdc91c303894f747058a"}}