{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:EZIUQVG37DGIJMHNRIZ3XPXCUK","short_pith_number":"pith:EZIUQVG3","schema_version":"1.0","canonical_sha256":"26514854dbf8cc84b0ed8a33bbbee2a2b985d502f15e96efb81c58317c902466","source":{"kind":"arxiv","id":"1901.07108","version":1},"attestation_state":"computed","paper":{"title":"The X-ray emission of z>2.5 active galactic nuclei can be obscured by their host galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Feltre, C. Circosta, C. Norman, C. Vignali, F. Calura, F. Vito, M. Massardi, R. Gilli, V. Mainieri","submitted_at":"2019-01-21T22:55:00Z","abstract_excerpt":"We present a multi-wavelength study of seven AGN at spectroscopic redshift >2.5 in the 7 Ms Chandra Deep Field South, selected to have good FIR/sub-mm detections. Our aim is to investigate the possibility that the obscuration observed in the X-rays can be produced by the interstellar medium (ISM) of the host galaxy. Based on the 7 Ms Chandra spectra, we measured obscuring column densities N$_{H, X}$ in excess of 7x10$^{22}$ cm$^{-2}$ and intrinsic X-ray luminosities L$_{X}$>10$^{44}$ erg s$^{-1}$ for our targets, as well as equivalent widths for the Fe K$\\alpha$ emission line EW>0.5-1 keV. We "},"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":"1901.07108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-21T22:55:00Z","cross_cats_sorted":[],"title_canon_sha256":"6e5aa758866061da85a67897f2cf86033c87e812b0b2dbbe3287ce0eb8f9b08e","abstract_canon_sha256":"f939c0549d8d17a3e5de70aa112a825d43f25152bb45efa0f5bedf49bfffd2ad"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:39.514897Z","signature_b64":"S+x9sDG+umFVK0MTIKI9H4h3or6tMOVil3Zkbg2O5nTnR/Q9ux36R3SKqeTyp+YcQkKyjfAokz0r2zHZyJQuBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"26514854dbf8cc84b0ed8a33bbbee2a2b985d502f15e96efb81c58317c902466","last_reissued_at":"2026-05-17T23:49:39.514396Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:39.514396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The X-ray emission of z>2.5 active galactic nuclei can be obscured by their host galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Feltre, C. Circosta, C. Norman, C. Vignali, F. Calura, F. Vito, M. Massardi, R. Gilli, V. Mainieri","submitted_at":"2019-01-21T22:55:00Z","abstract_excerpt":"We present a multi-wavelength study of seven AGN at spectroscopic redshift >2.5 in the 7 Ms Chandra Deep Field South, selected to have good FIR/sub-mm detections. Our aim is to investigate the possibility that the obscuration observed in the X-rays can be produced by the interstellar medium (ISM) of the host galaxy. Based on the 7 Ms Chandra spectra, we measured obscuring column densities N$_{H, X}$ in excess of 7x10$^{22}$ cm$^{-2}$ and intrinsic X-ray luminosities L$_{X}$>10$^{44}$ erg s$^{-1}$ for our targets, as well as equivalent widths for the Fe K$\\alpha$ emission line EW>0.5-1 keV. We "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07108","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1901.07108","created_at":"2026-05-17T23:49:39.514470+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.07108v1","created_at":"2026-05-17T23:49:39.514470+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07108","created_at":"2026-05-17T23:49:39.514470+00:00"},{"alias_kind":"pith_short_12","alias_value":"EZIUQVG37DGI","created_at":"2026-05-18T12:33:15.570797+00:00"},{"alias_kind":"pith_short_16","alias_value":"EZIUQVG37DGIJMHN","created_at":"2026-05-18T12:33:15.570797+00:00"},{"alias_kind":"pith_short_8","alias_value":"EZIUQVG3","created_at":"2026-05-18T12:33:15.570797+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/EZIUQVG37DGIJMHNRIZ3XPXCUK","json":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK.json","graph_json":"https://pith.science/api/pith-number/EZIUQVG37DGIJMHNRIZ3XPXCUK/graph.json","events_json":"https://pith.science/api/pith-number/EZIUQVG37DGIJMHNRIZ3XPXCUK/events.json","paper":"https://pith.science/paper/EZIUQVG3"},"agent_actions":{"view_html":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK","download_json":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK.json","view_paper":"https://pith.science/paper/EZIUQVG3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.07108&json=true","fetch_graph":"https://pith.science/api/pith-number/EZIUQVG37DGIJMHNRIZ3XPXCUK/graph.json","fetch_events":"https://pith.science/api/pith-number/EZIUQVG37DGIJMHNRIZ3XPXCUK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK/action/storage_attestation","attest_author":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK/action/author_attestation","sign_citation":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK/action/citation_signature","submit_replication":"https://pith.science/pith/EZIUQVG37DGIJMHNRIZ3XPXCUK/action/replication_record"}},"created_at":"2026-05-17T23:49:39.514470+00:00","updated_at":"2026-05-17T23:49:39.514470+00:00"}