{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:UGKWPCL6XFMTE6ZO2WN3GAWUML","short_pith_number":"pith:UGKWPCL6","schema_version":"1.0","canonical_sha256":"a19567897eb959327b2ed59bb302d462edd99a3d4e0618f7b60c17fe0fbf55f8","source":{"kind":"arxiv","id":"1811.06926","version":3},"attestation_state":"computed","paper":{"title":"New changing look case in NGC 1566","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"D. A. H. Buckley, E. S. Gorbovskoy, F. van Wyk, H. Winkler, N. V. Tyurina, S. S. Tsygankov, V. L. Oknyansky, V. M. Lipunov","submitted_at":"2018-11-16T17:19:16Z","abstract_excerpt":"We present a study of optical, UV and X-ray light curves of the nearby changing look active galactic nucleus in the galaxy NGC 1566 obtained with the Neil Gehrels Swift Observatory and the MASTER Global Robotic Network over the period 2007 - 2018. We also report on our optical spectroscopy at the South African Astronomical Observatory with the 1.9-m telescope on the night 2018 August 2-3. A substantial increase in X-ray flux by 1.5 orders of magnitude was observed following the brightening in the UV and optical bands during the last year. After a maximum was reached at the beginning of 2018 Ju"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1811.06926","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-16T17:19:16Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"1da298e4ea48899bfa3595a0d825c75c2e9ad7cf4a2ba674cbb7ac1b1e7b2b45","abstract_canon_sha256":"c26f628f3fbc7fed318d9f6123924185c34c059669577281b80acd437293a6fd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:30.838309Z","signature_b64":"wiYdz5XX+RJ+Kb/lCGiDYZji47HhtAjdktKq+igw5xAX3g2KgcT60WwtgR00P2cKCr4X6HNWMHp0LBD8PU3zBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a19567897eb959327b2ed59bb302d462edd99a3d4e0618f7b60c17fe0fbf55f8","last_reissued_at":"2026-05-17T23:57:30.837694Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:30.837694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"New changing look case in NGC 1566","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"D. A. H. Buckley, E. S. Gorbovskoy, F. van Wyk, H. Winkler, N. V. Tyurina, S. S. Tsygankov, V. L. Oknyansky, V. M. Lipunov","submitted_at":"2018-11-16T17:19:16Z","abstract_excerpt":"We present a study of optical, UV and X-ray light curves of the nearby changing look active galactic nucleus in the galaxy NGC 1566 obtained with the Neil Gehrels Swift Observatory and the MASTER Global Robotic Network over the period 2007 - 2018. We also report on our optical spectroscopy at the South African Astronomical Observatory with the 1.9-m telescope on the night 2018 August 2-3. A substantial increase in X-ray flux by 1.5 orders of magnitude was observed following the brightening in the UV and optical bands during the last year. After a maximum was reached at the beginning of 2018 Ju"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06926","kind":"arxiv","version":3},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1811.06926","created_at":"2026-05-17T23:57:30.837786+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.06926v3","created_at":"2026-05-17T23:57:30.837786+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06926","created_at":"2026-05-17T23:57:30.837786+00:00"},{"alias_kind":"pith_short_12","alias_value":"UGKWPCL6XFMT","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_16","alias_value":"UGKWPCL6XFMTE6ZO","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_8","alias_value":"UGKWPCL6","created_at":"2026-05-18T12:32:56.356000+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.22918","citing_title":"Strong X-ray Variability of I Zwicky 1: Obscuration from Clumpy Accretion-Disk Winds","ref_index":29,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML","json":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML.json","graph_json":"https://pith.science/api/pith-number/UGKWPCL6XFMTE6ZO2WN3GAWUML/graph.json","events_json":"https://pith.science/api/pith-number/UGKWPCL6XFMTE6ZO2WN3GAWUML/events.json","paper":"https://pith.science/paper/UGKWPCL6"},"agent_actions":{"view_html":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML","download_json":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML.json","view_paper":"https://pith.science/paper/UGKWPCL6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.06926&json=true","fetch_graph":"https://pith.science/api/pith-number/UGKWPCL6XFMTE6ZO2WN3GAWUML/graph.json","fetch_events":"https://pith.science/api/pith-number/UGKWPCL6XFMTE6ZO2WN3GAWUML/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML/action/storage_attestation","attest_author":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML/action/author_attestation","sign_citation":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML/action/citation_signature","submit_replication":"https://pith.science/pith/UGKWPCL6XFMTE6ZO2WN3GAWUML/action/replication_record"}},"created_at":"2026-05-17T23:57:30.837786+00:00","updated_at":"2026-05-17T23:57:30.837786+00:00"}