{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:3ZV2FLDLSZMC3GQS37K324LMCR","short_pith_number":"pith:3ZV2FLDL","canonical_record":{"source":{"id":"astro-ph/0001286","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-16T19:49:25Z","cross_cats_sorted":[],"title_canon_sha256":"077642712004c93b3d7f15c89543ba6301b3601a32f9e3151267847a3f1c9b27","abstract_canon_sha256":"b6ad83e774950e9dc1fe874d433f0d2cbe395ce41b08e6c6c47287c65d7e1c70"},"schema_version":"1.0"},"canonical_sha256":"de6ba2ac6b96582d9a12dfd5bd716c1456f0dd9d8cf0704d42357ae8fab50e07","source":{"kind":"arxiv","id":"astro-ph/0001286","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0001286","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0001286v1","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0001286","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"pith_short_12","alias_value":"3ZV2FLDLSZMC","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"pith_short_16","alias_value":"3ZV2FLDLSZMC3GQS","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"pith_short_8","alias_value":"3ZV2FLDL","created_at":"2026-07-04T14:48:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:3ZV2FLDLSZMC3GQS37K324LMCR","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0001286","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-16T19:49:25Z","cross_cats_sorted":[],"title_canon_sha256":"077642712004c93b3d7f15c89543ba6301b3601a32f9e3151267847a3f1c9b27","abstract_canon_sha256":"b6ad83e774950e9dc1fe874d433f0d2cbe395ce41b08e6c6c47287c65d7e1c70"},"schema_version":"1.0"},"canonical_sha256":"de6ba2ac6b96582d9a12dfd5bd716c1456f0dd9d8cf0704d42357ae8fab50e07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:48:45.939880Z","signature_b64":"HfbLPFizZQ7QkGse0N1OC6en7DRLTN7wsmIr26QLRDV4RQqCQcUx91DPbG68SL05T56R1cJs+VmubOZ7W0ZzCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"de6ba2ac6b96582d9a12dfd5bd716c1456f0dd9d8cf0704d42357ae8fab50e07","last_reissued_at":"2026-07-04T14:48:45.939533Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:48:45.939533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0001286","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":"2026-07-04T14:48:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SrFhW+rws6RrYdODSUjKVnKT3FJLgASiya/Nqscpy4I/UZL1cSROuRdi3ulf7SKtPRJlcmB8W7p4WAzuIr/OAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T02:42:33.167517Z"},"content_sha256":"420f1a01eaa83cfc6e8605f30f2c708f54dfc8befb88b0a3c2bac849f4639cc1","schema_version":"1.0","event_id":"sha256:420f1a01eaa83cfc6e8605f30f2c708f54dfc8befb88b0a3c2bac849f4639cc1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:3ZV2FLDLSZMC3GQS37K324LMCR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Starbursts in barred spiral galaxies IV: On young bars and the formation of abundance gradients","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"E. Davoust, R. Coziol, S. Considere, T. Contini","submitted_at":"2000-01-16T19:49:25Z","abstract_excerpt":"The oxygen (O/H) and N/O abundance ratios along the bar of 16 barred spiral starburst galaxies are determined using long-slit spectroscopy. The abundance gradients and the spatial distribution of the ionized gas along the bar are used to understand the role of bars in starburst galaxies.\n  The oxygen abundance gradients are steeper than in normal barred galaxies, while the intersects are low. This excludes the possibility that these are chemically evolved galaxies rejuvenated by the effect of a bar. The nitrogen-to-oxygen abundance gradients are flatter than the oxygen ones. But N/O intersects"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0001286","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/astro-ph/0001286/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":"2026-07-04T14:48:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DkGkoPU74BzeK4/xkMMpMrAl7UkGPMAZksLdB3vGlM83epRM0mmETQADfyvro27zHUbyVmwYHINThySynV1sAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T02:42:33.170377Z"},"content_sha256":"cf7b8d1dbb8134d26641638e807bc96911ee53cf7c32e0125491c23350af3f9c","schema_version":"1.0","event_id":"sha256:cf7b8d1dbb8134d26641638e807bc96911ee53cf7c32e0125491c23350af3f9c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3ZV2FLDLSZMC3GQS37K324LMCR/bundle.json","state_url":"https://pith.science/pith/3ZV2FLDLSZMC3GQS37K324LMCR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3ZV2FLDLSZMC3GQS37K324LMCR/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":"2026-08-06T02:42:33Z","links":{"resolver":"https://pith.science/pith/3ZV2FLDLSZMC3GQS37K324LMCR","bundle":"https://pith.science/pith/3ZV2FLDLSZMC3GQS37K324LMCR/bundle.json","state":"https://pith.science/pith/3ZV2FLDLSZMC3GQS37K324LMCR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3ZV2FLDLSZMC3GQS37K324LMCR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:3ZV2FLDLSZMC3GQS37K324LMCR","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":"b6ad83e774950e9dc1fe874d433f0d2cbe395ce41b08e6c6c47287c65d7e1c70","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-16T19:49:25Z","title_canon_sha256":"077642712004c93b3d7f15c89543ba6301b3601a32f9e3151267847a3f1c9b27"},"schema_version":"1.0","source":{"id":"astro-ph/0001286","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0001286","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0001286v1","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0001286","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"pith_short_12","alias_value":"3ZV2FLDLSZMC","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"pith_short_16","alias_value":"3ZV2FLDLSZMC3GQS","created_at":"2026-07-04T14:48:45Z"},{"alias_kind":"pith_short_8","alias_value":"3ZV2FLDL","created_at":"2026-07-04T14:48:45Z"}],"graph_snapshots":[{"event_id":"sha256:cf7b8d1dbb8134d26641638e807bc96911ee53cf7c32e0125491c23350af3f9c","target":"graph","created_at":"2026-07-04T14:48:45Z","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/0001286/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The oxygen (O/H) and N/O abundance ratios along the bar of 16 barred spiral starburst galaxies are determined using long-slit spectroscopy. The abundance gradients and the spatial distribution of the ionized gas along the bar are used to understand the role of bars in starburst galaxies.\n  The oxygen abundance gradients are steeper than in normal barred galaxies, while the intersects are low. This excludes the possibility that these are chemically evolved galaxies rejuvenated by the effect of a bar. The nitrogen-to-oxygen abundance gradients are flatter than the oxygen ones. But N/O intersects","authors_text":"E. Davoust, R. Coziol, S. Considere, T. Contini","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-01-16T19:49:25Z","title":"Starbursts in barred spiral galaxies IV: On young bars and the formation of abundance gradients"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0001286","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":"sha256:420f1a01eaa83cfc6e8605f30f2c708f54dfc8befb88b0a3c2bac849f4639cc1","target":"record","created_at":"2026-07-04T14:48:45Z","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":"b6ad83e774950e9dc1fe874d433f0d2cbe395ce41b08e6c6c47287c65d7e1c70","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-16T19:49:25Z","title_canon_sha256":"077642712004c93b3d7f15c89543ba6301b3601a32f9e3151267847a3f1c9b27"},"schema_version":"1.0","source":{"id":"astro-ph/0001286","kind":"arxiv","version":1}},"canonical_sha256":"de6ba2ac6b96582d9a12dfd5bd716c1456f0dd9d8cf0704d42357ae8fab50e07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de6ba2ac6b96582d9a12dfd5bd716c1456f0dd9d8cf0704d42357ae8fab50e07","first_computed_at":"2026-07-04T14:48:45.939533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:48:45.939533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HfbLPFizZQ7QkGse0N1OC6en7DRLTN7wsmIr26QLRDV4RQqCQcUx91DPbG68SL05T56R1cJs+VmubOZ7W0ZzCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T14:48:45.939880Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0001286","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:420f1a01eaa83cfc6e8605f30f2c708f54dfc8befb88b0a3c2bac849f4639cc1","sha256:cf7b8d1dbb8134d26641638e807bc96911ee53cf7c32e0125491c23350af3f9c"],"state_sha256":"eb68db05ec149f30525f0bb26c4a37dc44bdf92bbc9640c0f6053e65abd4108d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s0wz8CUjAn6uwKn7TOd+7i8qBRAK4EzjLhU7z/7drFlNGIAcIAHWvZL1p95ZwvssiXH4vmtye0mfTvoSZV6JDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T02:42:33.180694Z","bundle_sha256":"18065e6fd6ceb0b904fab5ed3f6f612460f6c83da5e4e1099d15dcb8163ab343"}}