{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:P7ZO25LXKRKZ3XXERS7L52JB6N","short_pith_number":"pith:P7ZO25LX","canonical_record":{"source":{"id":"2606.25890","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-06-24T14:37:04Z","cross_cats_sorted":[],"title_canon_sha256":"988eb3be1ebb2c57a25890d756843f8b9cf954f98df1e19085bbe8403ed7962a","abstract_canon_sha256":"95cfe5e47535f59c2036cf496644938f7a99d0d310be70cef44515c5d4acbb6b"},"schema_version":"1.0"},"canonical_sha256":"7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17","source":{"kind":"arxiv","id":"2606.25890","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.25890","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"arxiv_version","alias_value":"2606.25890v1","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.25890","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"pith_short_12","alias_value":"P7ZO25LXKRKZ","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"pith_short_16","alias_value":"P7ZO25LXKRKZ3XXE","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"pith_short_8","alias_value":"P7ZO25LX","created_at":"2026-06-25T01:18:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:P7ZO25LXKRKZ3XXERS7L52JB6N","target":"record","payload":{"canonical_record":{"source":{"id":"2606.25890","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-06-24T14:37:04Z","cross_cats_sorted":[],"title_canon_sha256":"988eb3be1ebb2c57a25890d756843f8b9cf954f98df1e19085bbe8403ed7962a","abstract_canon_sha256":"95cfe5e47535f59c2036cf496644938f7a99d0d310be70cef44515c5d4acbb6b"},"schema_version":"1.0"},"canonical_sha256":"7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-25T01:18:42.442499Z","signature_b64":"OJ7vGzOBmyzMyMuXMp1jG4Wr7TM1+xbAqUV9LiDGAw6NPl1QsUFvNz+2h18TuyIjhdHpLAR6aoCwnE34GjYfCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17","last_reissued_at":"2026-06-25T01:18:42.442167Z","signature_status":"signed_v1","first_computed_at":"2026-06-25T01:18:42.442167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.25890","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":"2026-06-25T01:18:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"55fjucLXYalsN90NDcoHqXWr6TSsNFvymTL0RI04q3Gbt5yNikunn3vG6j74Va59Cao2i5MtEALaf874poR6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T17:37:39.253681Z"},"content_sha256":"039541c28f3a68513d55c45fc123aa0e7ad51ccb7d305bd9a11ce9ba26fbddb7","schema_version":"1.0","event_id":"sha256:039541c28f3a68513d55c45fc123aa0e7ad51ccb7d305bd9a11ce9ba26fbddb7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:P7ZO25LXKRKZ3XXERS7L52JB6N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmic evolution of the helium and oxygen abundances in type 2 Active Galactic Nuclei: Helium-loud AGNs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Feltre, A. Marconi, G. C. Almeida, G. Cresci, G. F. H\\\"agele, I. N. Morais, L. N. Marinho, M. Armah, M. V. Cardaci, O. L. Dors, P. C. Santos, R. A. Riffel, R. L. Sanders, R. Maiolino, R. Riffel, X. Ji, Y. Isobe","submitted_at":"2026-06-24T14:37:04Z","abstract_excerpt":"We derive the helium and oxygen abundances in the Narrow Line Regions (NLRs) of 84 Active Galactic Nuclei (AGNs) spanning two redshift ranges: 65 objects at $z \\: < \\: 0.2$ and 19 objects at $2.8 \\lesssim z \\lesssim 6.8$. Spectroscopic data in the optical rest-frame range [3000 ${\\lambda}(\\text{\\AA})$ 7000] from the JADES survey and from the literature were used to estimate $\\text{He/H}$ and $\\text{O/H}$ via the $T_{\\rm e}$-method (7 objects) and strong-emission line calibrations (19 objects). Our results indicate that the ionization degree in AGNs increases toward higher redshifts, exhibiting"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.25890","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/2606.25890/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":"2026-06-25T01:18:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LdouSYY5Jb4YpY4pJJWr3qIhruWrqg2TizQs0Q55Dk8HaKEuF1k/xnyIR/RvkgsaS+j9FL8zSy/L20dewx+VAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T17:37:39.254050Z"},"content_sha256":"4d8a36a17693b0e8525b625db723b82c70f4b514cff9cf2cc7abd086464e60f3","schema_version":"1.0","event_id":"sha256:4d8a36a17693b0e8525b625db723b82c70f4b514cff9cf2cc7abd086464e60f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P7ZO25LXKRKZ3XXERS7L52JB6N/bundle.json","state_url":"https://pith.science/pith/P7ZO25LXKRKZ3XXERS7L52JB6N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P7ZO25LXKRKZ3XXERS7L52JB6N/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":"2026-06-26T17:37:39Z","links":{"resolver":"https://pith.science/pith/P7ZO25LXKRKZ3XXERS7L52JB6N","bundle":"https://pith.science/pith/P7ZO25LXKRKZ3XXERS7L52JB6N/bundle.json","state":"https://pith.science/pith/P7ZO25LXKRKZ3XXERS7L52JB6N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P7ZO25LXKRKZ3XXERS7L52JB6N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:P7ZO25LXKRKZ3XXERS7L52JB6N","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":"95cfe5e47535f59c2036cf496644938f7a99d0d310be70cef44515c5d4acbb6b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-06-24T14:37:04Z","title_canon_sha256":"988eb3be1ebb2c57a25890d756843f8b9cf954f98df1e19085bbe8403ed7962a"},"schema_version":"1.0","source":{"id":"2606.25890","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.25890","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"arxiv_version","alias_value":"2606.25890v1","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.25890","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"pith_short_12","alias_value":"P7ZO25LXKRKZ","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"pith_short_16","alias_value":"P7ZO25LXKRKZ3XXE","created_at":"2026-06-25T01:18:42Z"},{"alias_kind":"pith_short_8","alias_value":"P7ZO25LX","created_at":"2026-06-25T01:18:42Z"}],"graph_snapshots":[{"event_id":"sha256:4d8a36a17693b0e8525b625db723b82c70f4b514cff9cf2cc7abd086464e60f3","target":"graph","created_at":"2026-06-25T01:18:42Z","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/2606.25890/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We derive the helium and oxygen abundances in the Narrow Line Regions (NLRs) of 84 Active Galactic Nuclei (AGNs) spanning two redshift ranges: 65 objects at $z \\: < \\: 0.2$ and 19 objects at $2.8 \\lesssim z \\lesssim 6.8$. Spectroscopic data in the optical rest-frame range [3000 ${\\lambda}(\\text{\\AA})$ 7000] from the JADES survey and from the literature were used to estimate $\\text{He/H}$ and $\\text{O/H}$ via the $T_{\\rm e}$-method (7 objects) and strong-emission line calibrations (19 objects). Our results indicate that the ionization degree in AGNs increases toward higher redshifts, exhibiting","authors_text":"A. Feltre, A. Marconi, G. C. Almeida, G. Cresci, G. F. H\\\"agele, I. N. Morais, L. N. Marinho, M. Armah, M. V. Cardaci, O. L. Dors, P. C. Santos, R. A. Riffel, R. L. Sanders, R. Maiolino, R. Riffel, X. Ji, Y. Isobe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-06-24T14:37:04Z","title":"Cosmic evolution of the helium and oxygen abundances in type 2 Active Galactic Nuclei: Helium-loud AGNs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.25890","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":"sha256:039541c28f3a68513d55c45fc123aa0e7ad51ccb7d305bd9a11ce9ba26fbddb7","target":"record","created_at":"2026-06-25T01:18:42Z","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":"95cfe5e47535f59c2036cf496644938f7a99d0d310be70cef44515c5d4acbb6b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-06-24T14:37:04Z","title_canon_sha256":"988eb3be1ebb2c57a25890d756843f8b9cf954f98df1e19085bbe8403ed7962a"},"schema_version":"1.0","source":{"id":"2606.25890","kind":"arxiv","version":1}},"canonical_sha256":"7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17","first_computed_at":"2026-06-25T01:18:42.442167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-25T01:18:42.442167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OJ7vGzOBmyzMyMuXMp1jG4Wr7TM1+xbAqUV9LiDGAw6NPl1QsUFvNz+2h18TuyIjhdHpLAR6aoCwnE34GjYfCg==","signature_status":"signed_v1","signed_at":"2026-06-25T01:18:42.442499Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.25890","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:039541c28f3a68513d55c45fc123aa0e7ad51ccb7d305bd9a11ce9ba26fbddb7","sha256:4d8a36a17693b0e8525b625db723b82c70f4b514cff9cf2cc7abd086464e60f3"],"state_sha256":"5d56762e22a874083bf8fc9b4c47c67c0e6bc4786bddb6bed6ac355218e9f99b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d+9FMeiC0BFJribdlqnaoGQBjSSM2XwjEKJIbF6F1wEOwV+/HkKUdZprLpUM7Kw2SZQ2Nsq8rapSH1gwR6QQCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T17:37:39.256033Z","bundle_sha256":"12a22dd6dc62408f2dbdbc337528bff84ba07419723547e7c81de8414568cf74"}}