{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ZOKCFUEFU7MHLIJMGIOLRRUPCB","short_pith_number":"pith:ZOKCFUEF","canonical_record":{"source":{"id":"1109.1867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T00:43:17Z","cross_cats_sorted":[],"title_canon_sha256":"1f3f725e26e81626309ab8bab8d43a74d5dc81fb3168f630e33fad27028c91ef","abstract_canon_sha256":"28bd1ed344a16519dd8aab6b4ec1d1edae1daf3d8d23199736a4e60ef141c756"},"schema_version":"1.0"},"canonical_sha256":"cb9422d085a7d875a12c321cb8c68f107363fe11173ef6a2b8d9f3a996cc6175","source":{"kind":"arxiv","id":"1109.1867","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.1867","created_at":"2026-05-18T02:00:37Z"},{"alias_kind":"arxiv_version","alias_value":"1109.1867v1","created_at":"2026-05-18T02:00:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1867","created_at":"2026-05-18T02:00:37Z"},{"alias_kind":"pith_short_12","alias_value":"ZOKCFUEFU7MH","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"ZOKCFUEFU7MHLIJM","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"ZOKCFUEF","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ZOKCFUEFU7MHLIJMGIOLRRUPCB","target":"record","payload":{"canonical_record":{"source":{"id":"1109.1867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T00:43:17Z","cross_cats_sorted":[],"title_canon_sha256":"1f3f725e26e81626309ab8bab8d43a74d5dc81fb3168f630e33fad27028c91ef","abstract_canon_sha256":"28bd1ed344a16519dd8aab6b4ec1d1edae1daf3d8d23199736a4e60ef141c756"},"schema_version":"1.0"},"canonical_sha256":"cb9422d085a7d875a12c321cb8c68f107363fe11173ef6a2b8d9f3a996cc6175","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:37.539354Z","signature_b64":"Q+qDHxUVdKrYg9Qpfg0nT0bkc9Y/DBlimdVFlIf/9LgwcaAYBJPYnfDDRIm+O/4VJqjE6/iFI4ioaT6e8t8hAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb9422d085a7d875a12c321cb8c68f107363fe11173ef6a2b8d9f3a996cc6175","last_reissued_at":"2026-05-18T02:00:37.538774Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:37.538774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.1867","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":"2026-05-18T02:00:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8N02Bt/q/h2XWxeiusrpwhd/H2bp+CeorRlCMtyOkob7QehDYaUAnMRyuNG/9dLKL9QKnF+/JUICyxK0k0J1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:05:35.166570Z"},"content_sha256":"5276d017f7710e9d5b9109df153e00b252025f46607090d4628c393db69eef89","schema_version":"1.0","event_id":"sha256:5276d017f7710e9d5b9109df153e00b252025f46607090d4628c393db69eef89"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ZOKCFUEFU7MHLIJMGIOLRRUPCB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"C/O Abundance Ratios and Dust Features in Galactic Planetary Nebulae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"G. Delgado-Inglada, M. Rodr\\'iguez","submitted_at":"2011-09-09T00:43:17Z","abstract_excerpt":"The iron depletion factors found in Galactic planetary nebulae (PNe) span over two orders of magnitude, suggesting that there are differences in the grain formation and destruction processes from object to object. We explore here the relation between the iron depletions, the infrared dust features, and the C/O abundance ratios in a sample of Galactic PNe. We find that those objects with C/O < 1 show a trend of increasing depletions for higher values of C/O, whereas PNe with C/O > 1 break the trend and cover all the range of depletions. Most of the PNe with C/O < 1 show silicate features, but s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1867","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":"2026-05-18T02:00:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+i4W0kl5labzJVBkvCRu/JRNIEoSZMHratumqmjXORAvbDaukmLqSSoLtNM57gL3jFABvozUN0mHkbFkMPF8Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:05:35.166909Z"},"content_sha256":"39b056763e4a97f442de6e13c1f2fc8d72260ea2835cfc970b9becc29d8ad2bc","schema_version":"1.0","event_id":"sha256:39b056763e4a97f442de6e13c1f2fc8d72260ea2835cfc970b9becc29d8ad2bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB/bundle.json","state_url":"https://pith.science/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB/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":"2026-05-28T11:05:35Z","links":{"resolver":"https://pith.science/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB","bundle":"https://pith.science/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB/bundle.json","state":"https://pith.science/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZOKCFUEFU7MHLIJMGIOLRRUPCB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ZOKCFUEFU7MHLIJMGIOLRRUPCB","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":"28bd1ed344a16519dd8aab6b4ec1d1edae1daf3d8d23199736a4e60ef141c756","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T00:43:17Z","title_canon_sha256":"1f3f725e26e81626309ab8bab8d43a74d5dc81fb3168f630e33fad27028c91ef"},"schema_version":"1.0","source":{"id":"1109.1867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.1867","created_at":"2026-05-18T02:00:37Z"},{"alias_kind":"arxiv_version","alias_value":"1109.1867v1","created_at":"2026-05-18T02:00:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1867","created_at":"2026-05-18T02:00:37Z"},{"alias_kind":"pith_short_12","alias_value":"ZOKCFUEFU7MH","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"ZOKCFUEFU7MHLIJM","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"ZOKCFUEF","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:39b056763e4a97f442de6e13c1f2fc8d72260ea2835cfc970b9becc29d8ad2bc","target":"graph","created_at":"2026-05-18T02:00:37Z","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":"The iron depletion factors found in Galactic planetary nebulae (PNe) span over two orders of magnitude, suggesting that there are differences in the grain formation and destruction processes from object to object. We explore here the relation between the iron depletions, the infrared dust features, and the C/O abundance ratios in a sample of Galactic PNe. We find that those objects with C/O < 1 show a trend of increasing depletions for higher values of C/O, whereas PNe with C/O > 1 break the trend and cover all the range of depletions. Most of the PNe with C/O < 1 show silicate features, but s","authors_text":"G. Delgado-Inglada, M. Rodr\\'iguez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T00:43:17Z","title":"C/O Abundance Ratios and Dust Features in Galactic Planetary Nebulae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1867","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":"sha256:5276d017f7710e9d5b9109df153e00b252025f46607090d4628c393db69eef89","target":"record","created_at":"2026-05-18T02:00:37Z","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":"28bd1ed344a16519dd8aab6b4ec1d1edae1daf3d8d23199736a4e60ef141c756","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-09T00:43:17Z","title_canon_sha256":"1f3f725e26e81626309ab8bab8d43a74d5dc81fb3168f630e33fad27028c91ef"},"schema_version":"1.0","source":{"id":"1109.1867","kind":"arxiv","version":1}},"canonical_sha256":"cb9422d085a7d875a12c321cb8c68f107363fe11173ef6a2b8d9f3a996cc6175","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb9422d085a7d875a12c321cb8c68f107363fe11173ef6a2b8d9f3a996cc6175","first_computed_at":"2026-05-18T02:00:37.538774Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:37.538774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q+qDHxUVdKrYg9Qpfg0nT0bkc9Y/DBlimdVFlIf/9LgwcaAYBJPYnfDDRIm+O/4VJqjE6/iFI4ioaT6e8t8hAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:37.539354Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.1867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5276d017f7710e9d5b9109df153e00b252025f46607090d4628c393db69eef89","sha256:39b056763e4a97f442de6e13c1f2fc8d72260ea2835cfc970b9becc29d8ad2bc"],"state_sha256":"1d33af132c607bf6970d9ad9f47b769ba4bd25bdbffa8037f2d9c6b1fca8fa5d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mHOkp/wfl7WoKtG1QNYqqt3GqyZU4LDQtOhQNpo1sucU/4ny+YrHUWPF7vfH8EbfG4LnxnHMD6yHaHk1fUS6Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T11:05:35.168918Z","bundle_sha256":"45e5ce012de86e44ecbfa4285b4fdfa0defbf8be00022fd0473757f1e200e6c8"}}