{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LHGFYNCQ5OTGTRYZK2GTXMQHTT","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":"2200df2987479d3275c744f6c7c28d2c54fb6feb02a4ea5d41260457c4107320","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-19T17:31:26Z","title_canon_sha256":"a69791bdb9e13243112a0c0cd4a9ea66e71990ad0e3b6e2ff0f41c9dee572832"},"schema_version":"1.0","source":{"id":"1903.08122","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.08122","created_at":"2026-05-17T23:46:18Z"},{"alias_kind":"arxiv_version","alias_value":"1903.08122v2","created_at":"2026-05-17T23:46:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.08122","created_at":"2026-05-17T23:46:18Z"},{"alias_kind":"pith_short_12","alias_value":"LHGFYNCQ5OTG","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LHGFYNCQ5OTGTRYZ","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LHGFYNCQ","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:0d93553d7f10838bb67bba5d1d27556daf526b8e606ecec43b1f69b19a000f41","target":"graph","created_at":"2026-05-17T23:46:18Z","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":"Changing-look quasars are a newly-discovered class of luminous active galactic nuclei that undergo rapid ($\\lesssim$10 year) transitions between Type 1 and Type 1.9/2, with an associated change in their continuum emission. We characterize the host galaxies of four faded changing-look quasars using broadband optical imaging. We use \\textit{gri} images obtained with the Gemini Multi Object Spectrograph (GMOS) on Gemini North to characterize the surface brightness profiles of the quasar hosts and search for [O III] $\\lambda4959,\\lambda5007$ emission from spatially extended regions, or voorwerpjes","authors_text":"Chelsea L. MacLeod, Daryl Haggard, Jessie C. Runnoe, John J. Ruan, Michael Eracleous, Paul J. L. Charlton, Scott F. Anderson","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-19T17:31:26Z","title":"Gemini Imaging of the Host Galaxies of Changing-Look Quasars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.08122","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":"sha256:809f66021ba352d885f488f63fcfc1c9449fafb72ad1e41b630ba061d7828742","target":"record","created_at":"2026-05-17T23:46:18Z","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":"2200df2987479d3275c744f6c7c28d2c54fb6feb02a4ea5d41260457c4107320","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-19T17:31:26Z","title_canon_sha256":"a69791bdb9e13243112a0c0cd4a9ea66e71990ad0e3b6e2ff0f41c9dee572832"},"schema_version":"1.0","source":{"id":"1903.08122","kind":"arxiv","version":2}},"canonical_sha256":"59cc5c3450eba669c719568d3bb2079cc2588072ad7029ceb8155511d6a60839","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59cc5c3450eba669c719568d3bb2079cc2588072ad7029ceb8155511d6a60839","first_computed_at":"2026-05-17T23:46:18.138804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:18.138804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qDVC2RPDbBif55UIZiD3q5LnMnB/rDHScydHRJm/Sg0YzDcFQbgk7G/GlBeD3HoCYBD1rMqud8Ra4kYBMsiADw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:18.139584Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.08122","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:809f66021ba352d885f488f63fcfc1c9449fafb72ad1e41b630ba061d7828742","sha256:0d93553d7f10838bb67bba5d1d27556daf526b8e606ecec43b1f69b19a000f41"],"state_sha256":"542bee776ccf4be021bb7d6b3ac5d3869f4bc69c381c06ddd8a00f90c88c0434"}