{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:L7CMFRXODHRGNBEG5FT72BRUAO","short_pith_number":"pith:L7CMFRXO","canonical_record":{"source":{"id":"astro-ph/0210356","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-15T22:57:07Z","cross_cats_sorted":[],"title_canon_sha256":"75d43c833322b2a1ca58f22ded15c4f3fb4f5255413bfe12bc14ea164a77ae2c","abstract_canon_sha256":"533eb1a68d1917b624b6651ce5285616cef091f561c9064913ae2289067ce837"},"schema_version":"1.0"},"canonical_sha256":"5fc4c2c6ee19e2668486e967fd06340380a4096b28cab27dea59fff81130c303","source":{"kind":"arxiv","id":"astro-ph/0210356","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0210356","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0210356v2","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0210356","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"pith_short_12","alias_value":"L7CMFRXODHRG","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"pith_short_16","alias_value":"L7CMFRXODHRGNBEG","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"pith_short_8","alias_value":"L7CMFRXO","created_at":"2026-07-04T15:39:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:L7CMFRXODHRGNBEG5FT72BRUAO","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0210356","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-15T22:57:07Z","cross_cats_sorted":[],"title_canon_sha256":"75d43c833322b2a1ca58f22ded15c4f3fb4f5255413bfe12bc14ea164a77ae2c","abstract_canon_sha256":"533eb1a68d1917b624b6651ce5285616cef091f561c9064913ae2289067ce837"},"schema_version":"1.0"},"canonical_sha256":"5fc4c2c6ee19e2668486e967fd06340380a4096b28cab27dea59fff81130c303","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:39:54.787877Z","signature_b64":"ek9bfnE4kATWy3e3CkZcNysslQZ5dDcd4tsRnKaJGNCyAlVE9DetlrkkJcEIHsQ6Ln+qUMJbbd8hJWaPYJ/sBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fc4c2c6ee19e2668486e967fd06340380a4096b28cab27dea59fff81130c303","last_reissued_at":"2026-07-04T15:39:54.787358Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:39:54.787358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0210356","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:39:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WiIg9DoFjpG3hy/+R1Q0JI6V5IVn4VgdTYTuup9Z56b4sqNDT/3MNwB17VOce7qGOymHi1G4Rqr3T1IljufrDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T07:23:13.915771Z"},"content_sha256":"7ff3b1c9edb3357d97ec3dd9f5555884cb09e76ef0f51faa455ae68d11a0e6f7","schema_version":"1.0","event_id":"sha256:7ff3b1c9edb3357d97ec3dd9f5555884cb09e76ef0f51faa455ae68d11a0e6f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:L7CMFRXODHRGNBEG5FT72BRUAO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observations of [S IV] 10.5 micron and [Ne II] 12.8 micron in Two Halo Planetary Nebulae: Implications for Chemical Self-Enrichment","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) University of California at Davis, (3) Ohio State University), Harriet L. Dinerstein (1), John H. Lacy (1), K. Sellgren (3) ((1) University of Texas at Austin, Matthew J. Richter (2)","submitted_at":"2002-10-15T22:57:07Z","abstract_excerpt":"We have detected the [S IV] 10.5 micron and [Ne II] 12.8 micron fine-structure lines in the halo population planetary nebula (PN) DdDm 1, and set upper limits on their intensities in the halo PN H 4-1. We also present new measurements of optical lines from various ions of S, Ne, O, and H for DdDm 1, based on a high-dispersion spectrum covering the spectral range 3800 A to 1 micron. These nebulae have similar O/H abundances, (O/H) = 1e-4, but S/H and Ne/H are about half an order of magnitude lower in H 4-1 than in DdDm 1; thus H 4-1 appears to belong to a more metal-poor population. This suppor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0210356","kind":"arxiv","version":2},"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/astro-ph/0210356/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":"2026-07-04T15:39:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OrQvHVguXSEwmZV1ZX9s6dBx3UugTonLtfsmX81s9n6dWkMdsO4LJIRI+F4zTpdem546RZYxqyb2q60Z8P86BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T07:23:13.916139Z"},"content_sha256":"f8f73f3b7ab1634567b88fdaf53d562717846fd2a5549905944474fba698776c","schema_version":"1.0","event_id":"sha256:f8f73f3b7ab1634567b88fdaf53d562717846fd2a5549905944474fba698776c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L7CMFRXODHRGNBEG5FT72BRUAO/bundle.json","state_url":"https://pith.science/pith/L7CMFRXODHRGNBEG5FT72BRUAO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L7CMFRXODHRGNBEG5FT72BRUAO/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":"2026-07-05T07:23:13Z","links":{"resolver":"https://pith.science/pith/L7CMFRXODHRGNBEG5FT72BRUAO","bundle":"https://pith.science/pith/L7CMFRXODHRGNBEG5FT72BRUAO/bundle.json","state":"https://pith.science/pith/L7CMFRXODHRGNBEG5FT72BRUAO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L7CMFRXODHRGNBEG5FT72BRUAO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:L7CMFRXODHRGNBEG5FT72BRUAO","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":"533eb1a68d1917b624b6651ce5285616cef091f561c9064913ae2289067ce837","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-15T22:57:07Z","title_canon_sha256":"75d43c833322b2a1ca58f22ded15c4f3fb4f5255413bfe12bc14ea164a77ae2c"},"schema_version":"1.0","source":{"id":"astro-ph/0210356","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0210356","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0210356v2","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0210356","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"pith_short_12","alias_value":"L7CMFRXODHRG","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"pith_short_16","alias_value":"L7CMFRXODHRGNBEG","created_at":"2026-07-04T15:39:54Z"},{"alias_kind":"pith_short_8","alias_value":"L7CMFRXO","created_at":"2026-07-04T15:39:54Z"}],"graph_snapshots":[{"event_id":"sha256:f8f73f3b7ab1634567b88fdaf53d562717846fd2a5549905944474fba698776c","target":"graph","created_at":"2026-07-04T15:39:54Z","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/astro-ph/0210356/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have detected the [S IV] 10.5 micron and [Ne II] 12.8 micron fine-structure lines in the halo population planetary nebula (PN) DdDm 1, and set upper limits on their intensities in the halo PN H 4-1. We also present new measurements of optical lines from various ions of S, Ne, O, and H for DdDm 1, based on a high-dispersion spectrum covering the spectral range 3800 A to 1 micron. These nebulae have similar O/H abundances, (O/H) = 1e-4, but S/H and Ne/H are about half an order of magnitude lower in H 4-1 than in DdDm 1; thus H 4-1 appears to belong to a more metal-poor population. This suppor","authors_text":"(2) University of California at Davis, (3) Ohio State University), Harriet L. Dinerstein (1), John H. Lacy (1), K. Sellgren (3) ((1) University of Texas at Austin, Matthew J. Richter (2)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-10-15T22:57:07Z","title":"Observations of [S IV] 10.5 micron and [Ne II] 12.8 micron in Two Halo Planetary Nebulae: Implications for Chemical Self-Enrichment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0210356","kind":"arxiv","version":2},"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":"sha256:7ff3b1c9edb3357d97ec3dd9f5555884cb09e76ef0f51faa455ae68d11a0e6f7","target":"record","created_at":"2026-07-04T15:39:54Z","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":"533eb1a68d1917b624b6651ce5285616cef091f561c9064913ae2289067ce837","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-15T22:57:07Z","title_canon_sha256":"75d43c833322b2a1ca58f22ded15c4f3fb4f5255413bfe12bc14ea164a77ae2c"},"schema_version":"1.0","source":{"id":"astro-ph/0210356","kind":"arxiv","version":2}},"canonical_sha256":"5fc4c2c6ee19e2668486e967fd06340380a4096b28cab27dea59fff81130c303","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5fc4c2c6ee19e2668486e967fd06340380a4096b28cab27dea59fff81130c303","first_computed_at":"2026-07-04T15:39:54.787358Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:39:54.787358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ek9bfnE4kATWy3e3CkZcNysslQZ5dDcd4tsRnKaJGNCyAlVE9DetlrkkJcEIHsQ6Ln+qUMJbbd8hJWaPYJ/sBA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:39:54.787877Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0210356","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ff3b1c9edb3357d97ec3dd9f5555884cb09e76ef0f51faa455ae68d11a0e6f7","sha256:f8f73f3b7ab1634567b88fdaf53d562717846fd2a5549905944474fba698776c"],"state_sha256":"2349812d7d2e506880a67e8d8d89a2fc24f29c597c7f96e18fd7f3b7563159cb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+CZ2ZmTm+RWyf5xBixA/9A/OmhCDdsFQLC+WPo8mPt8dNBFhVt3VdqHsji+U1JveSoYzyRnofFPm+w9dq2ffAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T07:23:13.918030Z","bundle_sha256":"97b1deb048cc7911305731bf5850f75bf903ad42a805654a2189731cc6670ef8"}}