{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZPSE62NQJUUECQ63GKLIB6DTC3","short_pith_number":"pith:ZPSE62NQ","canonical_record":{"source":{"id":"1811.08448","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:05:25Z","cross_cats_sorted":[],"title_canon_sha256":"b20e17f27ccff9b7b1c42280c613eb513f034813c2698531a0e548aae779f6fa","abstract_canon_sha256":"dd651fcf699f4f9f10eafc434e80e7f232090361dac2795c75e9711738589d69"},"schema_version":"1.0"},"canonical_sha256":"cbe44f69b04d284143db329680f87316ccd454d55b012496165ca9977de1f9f8","source":{"kind":"arxiv","id":"1811.08448","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.08448","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1811.08448v1","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.08448","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"ZPSE62NQJUUE","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZPSE62NQJUUECQ63","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZPSE62NQ","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZPSE62NQJUUECQ63GKLIB6DTC3","target":"record","payload":{"canonical_record":{"source":{"id":"1811.08448","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:05:25Z","cross_cats_sorted":[],"title_canon_sha256":"b20e17f27ccff9b7b1c42280c613eb513f034813c2698531a0e548aae779f6fa","abstract_canon_sha256":"dd651fcf699f4f9f10eafc434e80e7f232090361dac2795c75e9711738589d69"},"schema_version":"1.0"},"canonical_sha256":"cbe44f69b04d284143db329680f87316ccd454d55b012496165ca9977de1f9f8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:36.321965Z","signature_b64":"z7mDrdI8IlfG/XivKvmXh66zP2IGP2ZAkMZze0N1GdoscNlXti2uoORDeWllmHKUjN4rJFEMHeroD38B5kMaAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbe44f69b04d284143db329680f87316ccd454d55b012496165ca9977de1f9f8","last_reissued_at":"2026-05-17T23:58:36.321299Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:36.321299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.08448","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":"2026-05-17T23:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"miHXuCIUoqEg1jp+GFLWl8qxEwu8xYG7kX/Lc7YyfkeSYJBG6ChRxAd0nXBX+pj6ibqI6prEc2he55tU2gqqCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:25:23.650298Z"},"content_sha256":"719cde603862a5e9cfc83bd058c6f635a1f224709082f7d7f7887dec027dd46d","schema_version":"1.0","event_id":"sha256:719cde603862a5e9cfc83bd058c6f635a1f224709082f7d7f7887dec027dd46d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZPSE62NQJUUECQ63GKLIB6DTC3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Atomic gas fractions in active galactic nucleus host galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Barbara Catinella, Luca Cortese, Sara L. Ellison, Toby Brown","submitted_at":"2018-11-20T19:05:25Z","abstract_excerpt":"The feedback from an active galactic nucleus (AGN) is frequently invoked as a mechanism through which gas can be heated or removed from a galaxy. However, gas fraction measurements in AGN hosts have yielded mixed support for this scenario. Here, we re-visit the assessment of fgas (=MHI/M*) in z<0.05 AGN hosts in the Sloan Digital Sky Survey (SDSS) using two complementary techniques. First, we investigate fgas for 75 AGN host galaxies in the extended GALEX Arecibo SDSS Survey (xGASS), whose atomic gas fractions are complete to a few percent. Second, we construct HI spectral stacks of 1562 AGN f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.08448","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":"2026-05-17T23:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tLCN6K2w3Ds9VJf2wlIL2c1phY0BpI0jXtndyQ3VsNTQ5SepKWerustW/5t7a9B0zt7fozObhPAQj2J7XR+4Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:25:23.651093Z"},"content_sha256":"8cf4b3609ca049ac30538c8b4946dcd7200b8b7350bd2450f9a3dfc08debbd60","schema_version":"1.0","event_id":"sha256:8cf4b3609ca049ac30538c8b4946dcd7200b8b7350bd2450f9a3dfc08debbd60"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZPSE62NQJUUECQ63GKLIB6DTC3/bundle.json","state_url":"https://pith.science/pith/ZPSE62NQJUUECQ63GKLIB6DTC3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZPSE62NQJUUECQ63GKLIB6DTC3/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":"2026-06-09T04:25:23Z","links":{"resolver":"https://pith.science/pith/ZPSE62NQJUUECQ63GKLIB6DTC3","bundle":"https://pith.science/pith/ZPSE62NQJUUECQ63GKLIB6DTC3/bundle.json","state":"https://pith.science/pith/ZPSE62NQJUUECQ63GKLIB6DTC3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZPSE62NQJUUECQ63GKLIB6DTC3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZPSE62NQJUUECQ63GKLIB6DTC3","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":"dd651fcf699f4f9f10eafc434e80e7f232090361dac2795c75e9711738589d69","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:05:25Z","title_canon_sha256":"b20e17f27ccff9b7b1c42280c613eb513f034813c2698531a0e548aae779f6fa"},"schema_version":"1.0","source":{"id":"1811.08448","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.08448","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1811.08448v1","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.08448","created_at":"2026-05-17T23:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"ZPSE62NQJUUE","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZPSE62NQJUUECQ63","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZPSE62NQ","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:8cf4b3609ca049ac30538c8b4946dcd7200b8b7350bd2450f9a3dfc08debbd60","target":"graph","created_at":"2026-05-17T23:58:36Z","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 feedback from an active galactic nucleus (AGN) is frequently invoked as a mechanism through which gas can be heated or removed from a galaxy. However, gas fraction measurements in AGN hosts have yielded mixed support for this scenario. Here, we re-visit the assessment of fgas (=MHI/M*) in z<0.05 AGN hosts in the Sloan Digital Sky Survey (SDSS) using two complementary techniques. First, we investigate fgas for 75 AGN host galaxies in the extended GALEX Arecibo SDSS Survey (xGASS), whose atomic gas fractions are complete to a few percent. Second, we construct HI spectral stacks of 1562 AGN f","authors_text":"Barbara Catinella, Luca Cortese, Sara L. Ellison, Toby Brown","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:05:25Z","title":"Atomic gas fractions in active galactic nucleus host galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.08448","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":"sha256:719cde603862a5e9cfc83bd058c6f635a1f224709082f7d7f7887dec027dd46d","target":"record","created_at":"2026-05-17T23:58:36Z","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":"dd651fcf699f4f9f10eafc434e80e7f232090361dac2795c75e9711738589d69","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:05:25Z","title_canon_sha256":"b20e17f27ccff9b7b1c42280c613eb513f034813c2698531a0e548aae779f6fa"},"schema_version":"1.0","source":{"id":"1811.08448","kind":"arxiv","version":1}},"canonical_sha256":"cbe44f69b04d284143db329680f87316ccd454d55b012496165ca9977de1f9f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbe44f69b04d284143db329680f87316ccd454d55b012496165ca9977de1f9f8","first_computed_at":"2026-05-17T23:58:36.321299Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:36.321299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z7mDrdI8IlfG/XivKvmXh66zP2IGP2ZAkMZze0N1GdoscNlXti2uoORDeWllmHKUjN4rJFEMHeroD38B5kMaAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:36.321965Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.08448","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:719cde603862a5e9cfc83bd058c6f635a1f224709082f7d7f7887dec027dd46d","sha256:8cf4b3609ca049ac30538c8b4946dcd7200b8b7350bd2450f9a3dfc08debbd60"],"state_sha256":"cca4dbf425e348ee478ca0b42a6e1c84b4d062ee4080e78cc329c662f65f8ff6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ULsusjkgVBchgHG24XgQwzC0ulowdWIRBEijP/k5pm1NfCro+KKWkNY7VrWoU68R5EP/ouZJxD7PSwdemryBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T04:25:23.654926Z","bundle_sha256":"ecfd0e724d65124c48a5d05bea9ebf476e74bb7493f43e584d62c1725a820171"}}