{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:4LGRRU5H66XDX4JZQVA3QXOYXH","short_pith_number":"pith:4LGRRU5H","schema_version":"1.0","canonical_sha256":"e2cd18d3a7f7ae3bf1398541b85dd8b9c4bf814de5d30b2ac437c6646bcf96e0","source":{"kind":"arxiv","id":"2204.06813","version":1},"attestation_state":"computed","paper":{"title":"Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"B. De Marco, C. Pinto, D. J. Walton, E. Behar, E. Costantini, G. A. Kriss, G. Branduardi-Raymont, G. Ponti, H. Landt, J. Ebrero, J. S. Kaastra, Junjie Mao, L. Di Gesu, M. Mehdipour, P.-O. Petrucci, S. Bianchi, S. Grafton-Waters, Yasushi Fukazawa, Yijun Wang","submitted_at":"2022-04-14T08:20:43Z","abstract_excerpt":"A growing number of transient X-ray obscuration events in type I AGN suggest that our line-of-sight to the central engine is not always free. Multiple X-ray obscuration events have been reported in the nearby Seyfert 1.5 galaxy NGC 3227 from 2000 to 2016. In late 2019, another X-ray obscuration event was identified with Swift. Two coordinated target-of-opportunity observations with XMM-Newton, NuSTAR, and HST/COS were triggered in Nov. and Dec. 2019 to study this obscuration event. For each observation, we analyze the time-averaged X-ray spectra. We perform photoionization modeling with the SP"},"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":"2204.06813","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-04-14T08:20:43Z","cross_cats_sorted":[],"title_canon_sha256":"9295869c8d8368b2b5ee0df5a8f9cc0e4041554793839e7ee6591df4db23510f","abstract_canon_sha256":"0975d78ac9db5c3cd38de5c9bab85ce671428108d551380bc4302bb3be836c8e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:57:07.476630Z","signature_b64":"WWjMAQGYtZBo3HTbfoBg/3ksljcmc0AnNcKJLYDQ0BxiOnxhUz8Xe49lDxtiO2DdOJ8XFscRT3xpJsEyU0JPCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2cd18d3a7f7ae3bf1398541b85dd8b9c4bf814de5d30b2ac437c6646bcf96e0","last_reissued_at":"2026-07-05T04:57:07.476247Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:57:07.476247Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"B. De Marco, C. Pinto, D. J. Walton, E. Behar, E. Costantini, G. A. Kriss, G. Branduardi-Raymont, G. Ponti, H. Landt, J. Ebrero, J. S. Kaastra, Junjie Mao, L. Di Gesu, M. Mehdipour, P.-O. Petrucci, S. Bianchi, S. Grafton-Waters, Yasushi Fukazawa, Yijun Wang","submitted_at":"2022-04-14T08:20:43Z","abstract_excerpt":"A growing number of transient X-ray obscuration events in type I AGN suggest that our line-of-sight to the central engine is not always free. Multiple X-ray obscuration events have been reported in the nearby Seyfert 1.5 galaxy NGC 3227 from 2000 to 2016. In late 2019, another X-ray obscuration event was identified with Swift. Two coordinated target-of-opportunity observations with XMM-Newton, NuSTAR, and HST/COS were triggered in Nov. and Dec. 2019 to study this obscuration event. For each observation, we analyze the time-averaged X-ray spectra. We perform photoionization modeling with the SP"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.06813","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/2204.06813/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2204.06813","created_at":"2026-07-05T04:57:07.476303+00:00"},{"alias_kind":"arxiv_version","alias_value":"2204.06813v1","created_at":"2026-07-05T04:57:07.476303+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.06813","created_at":"2026-07-05T04:57:07.476303+00:00"},{"alias_kind":"pith_short_12","alias_value":"4LGRRU5H66XD","created_at":"2026-07-05T04:57:07.476303+00:00"},{"alias_kind":"pith_short_16","alias_value":"4LGRRU5H66XDX4JZ","created_at":"2026-07-05T04:57:07.476303+00:00"},{"alias_kind":"pith_short_8","alias_value":"4LGRRU5H","created_at":"2026-07-05T04:57:07.476303+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH","json":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH.json","graph_json":"https://pith.science/api/pith-number/4LGRRU5H66XDX4JZQVA3QXOYXH/graph.json","events_json":"https://pith.science/api/pith-number/4LGRRU5H66XDX4JZQVA3QXOYXH/events.json","paper":"https://pith.science/paper/4LGRRU5H"},"agent_actions":{"view_html":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH","download_json":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH.json","view_paper":"https://pith.science/paper/4LGRRU5H","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2204.06813&json=true","fetch_graph":"https://pith.science/api/pith-number/4LGRRU5H66XDX4JZQVA3QXOYXH/graph.json","fetch_events":"https://pith.science/api/pith-number/4LGRRU5H66XDX4JZQVA3QXOYXH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH/action/storage_attestation","attest_author":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH/action/author_attestation","sign_citation":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH/action/citation_signature","submit_replication":"https://pith.science/pith/4LGRRU5H66XDX4JZQVA3QXOYXH/action/replication_record"}},"created_at":"2026-07-05T04:57:07.476303+00:00","updated_at":"2026-07-05T04:57:07.476303+00:00"}