{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:NGF4IMYURJ2NMDHQZHSQNXYP7L","short_pith_number":"pith:NGF4IMYU","canonical_record":{"source":{"id":"2605.01981","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-03T17:30:40Z","cross_cats_sorted":[],"title_canon_sha256":"4b29b07885088d2501243f1ed9cc0b93d1bbf8974607f0e8567c2ff900adb964","abstract_canon_sha256":"3191501a777bc34a722f78cd684e123d0dfebbb1887d23bbd6c6888db9e22bec"},"schema_version":"1.0"},"canonical_sha256":"698bc433148a74d60cf0c9e506df0ffae232eec478e7935a2e3015b1a144e91d","source":{"kind":"arxiv","id":"2605.01981","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.01981","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"arxiv_version","alias_value":"2605.01981v2","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.01981","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"pith_short_12","alias_value":"NGF4IMYURJ2N","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"pith_short_16","alias_value":"NGF4IMYURJ2NMDHQ","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"pith_short_8","alias_value":"NGF4IMYU","created_at":"2026-08-05T01:36:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:NGF4IMYURJ2NMDHQZHSQNXYP7L","target":"record","payload":{"canonical_record":{"source":{"id":"2605.01981","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-03T17:30:40Z","cross_cats_sorted":[],"title_canon_sha256":"4b29b07885088d2501243f1ed9cc0b93d1bbf8974607f0e8567c2ff900adb964","abstract_canon_sha256":"3191501a777bc34a722f78cd684e123d0dfebbb1887d23bbd6c6888db9e22bec"},"schema_version":"1.0"},"canonical_sha256":"698bc433148a74d60cf0c9e506df0ffae232eec478e7935a2e3015b1a144e91d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-05T01:36:27.772432Z","signature_b64":"t/jzmml9+XDq1taomauZvPbTi+/SEMu2+gS/VpeL+ySVTo2wyOBcFNbnx5qSGIJcPRcE1N4F6SmImTgehXRsAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"698bc433148a74d60cf0c9e506df0ffae232eec478e7935a2e3015b1a144e91d","last_reissued_at":"2026-08-05T01:36:27.770832Z","signature_status":"signed_v1","first_computed_at":"2026-08-05T01:36:27.770832Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.01981","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":"2026-08-05T01:36:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6UZii084pPjFkKTmdEWUj97c5OwO7TVyHaqGE+0nOdgf7O5ZE4esmRGJ+uhzCEiMSH29PY56JWrdYML1WfZgDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T02:11:11.725126Z"},"content_sha256":"d4a1472fc2a60940822496d1f626a9136443b1f0f59af9462397189b6a7fea68","schema_version":"1.0","event_id":"sha256:d4a1472fc2a60940822496d1f626a9136443b1f0f59af9462397189b6a7fea68"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:NGF4IMYURJ2NMDHQZHSQNXYP7L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Comprehensive Study of Morphology and Kinematics in Extended Nebulae Around UV Luminous Quasars at $z\\approx1$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Giant nebulae around quasars at z≈1 arise through multiple pathways, with the largest irregular ones often tied to galaxy interactions.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexander Beckett, Andrea Travascio, Beno\\^it Epinat, David DePalma, Elise Fuller, Eric F. Bell, Fakhri S. Zahedy, Gwen C. Rudie, Hsiao-Wen Chen, Jennifer I-Hsiu Li, Joop Schaye, Mandy C. Chen, Marc Rafelski, Nishant Mishra, Patrick Petitjean, Sayak Dutta, Sean D. Johnson, Sebasti\\'an L\\'opez, Sebastiano Cantalupo, Sowgat Muzahid, Wolfram Kollatschny, Zhijie Qu, Zhuoqi Liu","submitted_at":"2026-05-03T17:30:40Z","abstract_excerpt":"Gas flows between galaxies and the circumgalactic medium (CGM) play a central role in galaxy evolution and can become observable as giant nebulae when illuminated by the quasars. We present an ensemble study of nebulae around 30 UV-luminous quasars at z=0.4-1.4 from the CUBS and MUSEQuBES surveys, 27 of which are detected in extended [O II] and/or [O III] emission. Based on a joint analysis of nebular morphology and surrounding galaxy environments, we introduce three morpho-kinematic classifications. We identify eleven irregular, large-scale (>50 kpc) systems, many of which are likely interact"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"giant quasar nebulae are not a uniform class of objects, but instead arise through multiple pathways shaped by host-galaxy gas, galaxy interactions, group environments, and quasar activity, with the most striking cases associated with galaxy interactions.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The morpho-kinematic classifications reliably trace distinct physical origins (e.g., interactions for irregular large-scale systems) without major contamination from projection effects, incomplete sampling, or alternative excitation mechanisms.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Quasar nebulae at z~1 are diverse objects shaped by galaxy interactions, host gas, group environments, and quasar activity, with the largest irregular ones most tied to interactions.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Giant nebulae around quasars at z≈1 arise through multiple pathways, with the largest irregular ones often tied to galaxy interactions.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"5be0be973238a2f1f7479ffc31d7c0d62fe05ea99299fc72ea1c5e9dccebeb30"},"source":{"id":"2605.01981","kind":"arxiv","version":2},"verdict":{"id":"fb9b2da6-1e0d-42d0-a549-951a4c52d186","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-08T19:31:06.155965Z","strongest_claim":"giant quasar nebulae are not a uniform class of objects, but instead arise through multiple pathways shaped by host-galaxy gas, galaxy interactions, group environments, and quasar activity, with the most striking cases associated with galaxy interactions.","one_line_summary":"Quasar nebulae at z~1 are diverse objects shaped by galaxy interactions, host gas, group environments, and quasar activity, with the largest irregular ones most tied to interactions.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The morpho-kinematic classifications reliably trace distinct physical origins (e.g., interactions for irregular large-scale systems) without major contamination from projection effects, incomplete sampling, or alternative excitation mechanisms.","pith_extraction_headline":"Giant nebulae around quasars at z≈1 arise through multiple pathways, with the largest irregular ones often tied to galaxy interactions."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.01981/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-20T16:40:18.997647Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_title_agreement","ran_at":"2026-05-20T04:31:22.466205Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T16:49:51.421664Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"26044594e1f543dae4205c741248a8b24241227ac9002e76723328e5e0755f7b"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":3,"snapshot_sha256":"fa064e83b9bacedeff7869b5ec0d294f9547e62ff070ad7a2dbe5565e8d08cbc"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":"fb9b2da6-1e0d-42d0-a549-951a4c52d186"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-05T01:36:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kinpLRtKAZhvQKUnelwO4xHJn106aBKZ1QPSWaYh+6Z04EHBpI9jmpy5q2rXekFPoAzXzQ7/FMy7CKknS/LJCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T02:11:11.726312Z"},"content_sha256":"69f70a8714c9311cabc012c9125edf008fd0b7a29e44aec61487080c4f8c735a","schema_version":"1.0","event_id":"sha256:69f70a8714c9311cabc012c9125edf008fd0b7a29e44aec61487080c4f8c735a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L/bundle.json","state_url":"https://pith.science/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L/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":"2026-08-06T02:11:11Z","links":{"resolver":"https://pith.science/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L","bundle":"https://pith.science/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L/bundle.json","state":"https://pith.science/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NGF4IMYURJ2NMDHQZHSQNXYP7L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:NGF4IMYURJ2NMDHQZHSQNXYP7L","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":"3191501a777bc34a722f78cd684e123d0dfebbb1887d23bbd6c6888db9e22bec","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-03T17:30:40Z","title_canon_sha256":"4b29b07885088d2501243f1ed9cc0b93d1bbf8974607f0e8567c2ff900adb964"},"schema_version":"1.0","source":{"id":"2605.01981","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.01981","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"arxiv_version","alias_value":"2605.01981v2","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.01981","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"pith_short_12","alias_value":"NGF4IMYURJ2N","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"pith_short_16","alias_value":"NGF4IMYURJ2NMDHQ","created_at":"2026-08-05T01:36:27Z"},{"alias_kind":"pith_short_8","alias_value":"NGF4IMYU","created_at":"2026-08-05T01:36:27Z"}],"graph_snapshots":[{"event_id":"sha256:69f70a8714c9311cabc012c9125edf008fd0b7a29e44aec61487080c4f8c735a","target":"graph","created_at":"2026-08-05T01:36:27Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"giant quasar nebulae are not a uniform class of objects, but instead arise through multiple pathways shaped by host-galaxy gas, galaxy interactions, group environments, and quasar activity, with the most striking cases associated with galaxy interactions."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The morpho-kinematic classifications reliably trace distinct physical origins (e.g., interactions for irregular large-scale systems) without major contamination from projection effects, incomplete sampling, or alternative excitation mechanisms."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Quasar nebulae at z~1 are diverse objects shaped by galaxy interactions, host gas, group environments, and quasar activity, with the largest irregular ones most tied to interactions."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Giant nebulae around quasars at z≈1 arise through multiple pathways, with the largest irregular ones often tied to galaxy interactions."}],"snapshot_sha256":"5be0be973238a2f1f7479ffc31d7c0d62fe05ea99299fc72ea1c5e9dccebeb30"},"formal_canon":{"evidence_count":3,"snapshot_sha256":"fa064e83b9bacedeff7869b5ec0d294f9547e62ff070ad7a2dbe5565e8d08cbc"},"integrity":{"available":true,"clean":true,"detectors_run":[{"findings_count":0,"name":"ai_meta_artifact","ran_at":"2026-05-20T16:40:18.997647Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"doi_title_agreement","ran_at":"2026-05-20T04:31:22.466205Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"doi_compliance","ran_at":"2026-05-19T16:49:51.421664Z","status":"completed","version":"1.0.0"}],"endpoint":"/pith/2605.01981/integrity.json","findings":[],"snapshot_sha256":"26044594e1f543dae4205c741248a8b24241227ac9002e76723328e5e0755f7b","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gas flows between galaxies and the circumgalactic medium (CGM) play a central role in galaxy evolution and can become observable as giant nebulae when illuminated by the quasars. We present an ensemble study of nebulae around 30 UV-luminous quasars at z=0.4-1.4 from the CUBS and MUSEQuBES surveys, 27 of which are detected in extended [O II] and/or [O III] emission. Based on a joint analysis of nebular morphology and surrounding galaxy environments, we introduce three morpho-kinematic classifications. We identify eleven irregular, large-scale (>50 kpc) systems, many of which are likely interact","authors_text":"Alexander Beckett, Andrea Travascio, Beno\\^it Epinat, David DePalma, Elise Fuller, Eric F. Bell, Fakhri S. Zahedy, Gwen C. Rudie, Hsiao-Wen Chen, Jennifer I-Hsiu Li, Joop Schaye, Mandy C. Chen, Marc Rafelski, Nishant Mishra, Patrick Petitjean, Sayak Dutta, Sean D. Johnson, Sebasti\\'an L\\'opez, Sebastiano Cantalupo, Sowgat Muzahid, Wolfram Kollatschny, Zhijie Qu, Zhuoqi Liu","cross_cats":[],"headline":"Giant nebulae around quasars at z≈1 arise through multiple pathways, with the largest irregular ones often tied to galaxy interactions.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-03T17:30:40Z","title":"A Comprehensive Study of Morphology and Kinematics in Extended Nebulae Around UV Luminous Quasars at $z\\approx1$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.01981","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-08T19:31:06.155965Z","id":"fb9b2da6-1e0d-42d0-a549-951a4c52d186","model_set":{"reader":"grok-4.3"},"one_line_summary":"Quasar nebulae at z~1 are diverse objects shaped by galaxy interactions, host gas, group environments, and quasar activity, with the largest irregular ones most tied to interactions.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Giant nebulae around quasars at z≈1 arise through multiple pathways, with the largest irregular ones often tied to galaxy interactions.","strongest_claim":"giant quasar nebulae are not a uniform class of objects, but instead arise through multiple pathways shaped by host-galaxy gas, galaxy interactions, group environments, and quasar activity, with the most striking cases associated with galaxy interactions.","weakest_assumption":"The morpho-kinematic classifications reliably trace distinct physical origins (e.g., interactions for irregular large-scale systems) without major contamination from projection effects, incomplete sampling, or alternative excitation mechanisms."}},"verdict_id":"fb9b2da6-1e0d-42d0-a549-951a4c52d186"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d4a1472fc2a60940822496d1f626a9136443b1f0f59af9462397189b6a7fea68","target":"record","created_at":"2026-08-05T01:36:27Z","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":"3191501a777bc34a722f78cd684e123d0dfebbb1887d23bbd6c6888db9e22bec","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-03T17:30:40Z","title_canon_sha256":"4b29b07885088d2501243f1ed9cc0b93d1bbf8974607f0e8567c2ff900adb964"},"schema_version":"1.0","source":{"id":"2605.01981","kind":"arxiv","version":2}},"canonical_sha256":"698bc433148a74d60cf0c9e506df0ffae232eec478e7935a2e3015b1a144e91d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"698bc433148a74d60cf0c9e506df0ffae232eec478e7935a2e3015b1a144e91d","first_computed_at":"2026-08-05T01:36:27.770832Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-05T01:36:27.770832Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"t/jzmml9+XDq1taomauZvPbTi+/SEMu2+gS/VpeL+ySVTo2wyOBcFNbnx5qSGIJcPRcE1N4F6SmImTgehXRsAw==","signature_status":"signed_v1","signed_at":"2026-08-05T01:36:27.772432Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.01981","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4a1472fc2a60940822496d1f626a9136443b1f0f59af9462397189b6a7fea68","sha256:69f70a8714c9311cabc012c9125edf008fd0b7a29e44aec61487080c4f8c735a"],"state_sha256":"f312247b101828e1c72b92266b8640d7461d90b66477d198676164bce5875d9e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UAluGHvtPYUiJOyVrR/bZ9peUZdAs9t74w+1mz+KSzcTLLCpikU6g8Y/uBcKZwcewOmExrVbh8n0uzHSFGDpAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T02:11:11.733639Z","bundle_sha256":"e7fefcbaa5dee46c9642de4c4c0e67ed0740b31432374523751ef7c1e4e70a59"}}