{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:W4UHYMU6S3TZRLVR4AEXG2A2ST","short_pith_number":"pith:W4UHYMU6","schema_version":"1.0","canonical_sha256":"b7287c329e96e798aeb1e00973681a94e156c6cb228ebfeb9920ccf8d53df1cb","source":{"kind":"arxiv","id":"2007.02616","version":2},"attestation_state":"computed","paper":{"title":"A hard look at local, optically-selected, obscured Seyfert galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. M. Lohfink, A. Zoghbi, D. Barret, D. Proga, D. Stern, E. Behar, E. S. Kammoun, J. M. Miller, J. S. Kaastra, K. Oh, L. W. Brenneman, M. Koss, R. F. Mushotzky, W. N. Brandt","submitted_at":"2020-07-06T10:11:44Z","abstract_excerpt":"We study the X-ray spectra of a sample of 19 obscured, optically-selected Seyfert galaxies (Sy 1.8, 1.9 and 2) in the local universe ($d \\leq 175$~Mpc), drawn from the CfA Seyfert sample. Our analysis is driven by the high sensitivity of NuSTAR in the hard X-rays, coupled with soft X-ray spectra using XMM-Newton, Chandra, Suzaku, and Swift/XRT. We also analyze the optical spectra of these sources in order to obtain accurate mass estimates and Eddington fractions. We employ four different models to analyze the X-ray spectra of these sources, which all result in consistent results. We find that "},"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":"2007.02616","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-07-06T10:11:44Z","cross_cats_sorted":[],"title_canon_sha256":"3d6c487923319da13404548792873fe146e6ddd1e05409229ea4f1846d5a4fe3","abstract_canon_sha256":"d428e6a1ebb044dcd04e07b1e6cadeac7d8d8bc0f371903c5baaeb04e86de7c7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:42:39.138264Z","signature_b64":"YryYT4IHbXbTLv52yxCtkciB+zgqJeUcWPfjVgJzNuOp4dDuNUTKo6Z6tUq4Cdi6d0CXFQRwlZ3khyQ40stqAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7287c329e96e798aeb1e00973681a94e156c6cb228ebfeb9920ccf8d53df1cb","last_reissued_at":"2026-07-05T01:42:39.137868Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:42:39.137868Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A hard look at local, optically-selected, obscured Seyfert galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. M. Lohfink, A. Zoghbi, D. Barret, D. Proga, D. Stern, E. Behar, E. S. Kammoun, J. M. Miller, J. S. Kaastra, K. Oh, L. W. Brenneman, M. Koss, R. F. Mushotzky, W. N. Brandt","submitted_at":"2020-07-06T10:11:44Z","abstract_excerpt":"We study the X-ray spectra of a sample of 19 obscured, optically-selected Seyfert galaxies (Sy 1.8, 1.9 and 2) in the local universe ($d \\leq 175$~Mpc), drawn from the CfA Seyfert sample. Our analysis is driven by the high sensitivity of NuSTAR in the hard X-rays, coupled with soft X-ray spectra using XMM-Newton, Chandra, Suzaku, and Swift/XRT. We also analyze the optical spectra of these sources in order to obtain accurate mass estimates and Eddington fractions. We employ four different models to analyze the X-ray spectra of these sources, which all result in consistent results. We find that "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.02616","kind":"arxiv","version":2},"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/2007.02616/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":"2007.02616","created_at":"2026-07-05T01:42:39.137924+00:00"},{"alias_kind":"arxiv_version","alias_value":"2007.02616v2","created_at":"2026-07-05T01:42:39.137924+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.02616","created_at":"2026-07-05T01:42:39.137924+00:00"},{"alias_kind":"pith_short_12","alias_value":"W4UHYMU6S3TZ","created_at":"2026-07-05T01:42:39.137924+00:00"},{"alias_kind":"pith_short_16","alias_value":"W4UHYMU6S3TZRLVR","created_at":"2026-07-05T01:42:39.137924+00:00"},{"alias_kind":"pith_short_8","alias_value":"W4UHYMU6","created_at":"2026-07-05T01:42:39.137924+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/W4UHYMU6S3TZRLVR4AEXG2A2ST","json":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST.json","graph_json":"https://pith.science/api/pith-number/W4UHYMU6S3TZRLVR4AEXG2A2ST/graph.json","events_json":"https://pith.science/api/pith-number/W4UHYMU6S3TZRLVR4AEXG2A2ST/events.json","paper":"https://pith.science/paper/W4UHYMU6"},"agent_actions":{"view_html":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST","download_json":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST.json","view_paper":"https://pith.science/paper/W4UHYMU6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2007.02616&json=true","fetch_graph":"https://pith.science/api/pith-number/W4UHYMU6S3TZRLVR4AEXG2A2ST/graph.json","fetch_events":"https://pith.science/api/pith-number/W4UHYMU6S3TZRLVR4AEXG2A2ST/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST/action/timestamp_anchor","attest_storage":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST/action/storage_attestation","attest_author":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST/action/author_attestation","sign_citation":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST/action/citation_signature","submit_replication":"https://pith.science/pith/W4UHYMU6S3TZRLVR4AEXG2A2ST/action/replication_record"}},"created_at":"2026-07-05T01:42:39.137924+00:00","updated_at":"2026-07-05T01:42:39.137924+00:00"}