{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:OVFNTZKQZL6RTG67C2NSQRB632","short_pith_number":"pith:OVFNTZKQ","schema_version":"1.0","canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","source":{"kind":"arxiv","id":"1605.04607","version":1},"attestation_state":"computed","paper":{"title":"Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Frederick Hamann, G\\'abor Worseck, George D. Becker, Guido Cupani, Isabelle P\\^aris, J. Xavier Prochaska, Kelly D. Denney, Lise Christensen, Marianne Vestergaard, Sara Ellison, Sebastian L\\`opez, Serena Perrotta, Stefano Cristiani, Trystyn A. M. Berg, Valentina D'Odorico","submitted_at":"2016-05-15T21:39:48Z","abstract_excerpt":"We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or velocity cut-off. We analyze the spectra of 100 quasars with 3.5 < z$\\rm_{em}$ < 4.5, observed with X-shooter/VLT in the context of the XQ-100 Legacy Survey. We detect a $\\sim$ 8 $\\sigma$ excess in the number density of absorbers within 10,000 km/s of the quasar emission redshift with respect to the random occurrence of NALs. This excess does not show a depe"},"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":"1605.04607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-15T21:39:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6c70c32f03f2ec64bdb92bf8cbe883740d4b5f513f380a860c4c3b47488ca329","abstract_canon_sha256":"6c86a5e13ebb5f28e82daa27408d67ddb3b6ece5f86bc92c4ab2ad45a2341784"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:05:43.233474Z","signature_b64":"ETGuHsd6gh74tfPV5cppNo5a+VZKhDk0p3r5FuecyudS7v7CDvozkre5Y3zMjpJFqdwKsi7NsIJwHHpQ47ZbCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","last_reissued_at":"2026-05-18T01:05:43.233044Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:05:43.233044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Frederick Hamann, G\\'abor Worseck, George D. Becker, Guido Cupani, Isabelle P\\^aris, J. Xavier Prochaska, Kelly D. Denney, Lise Christensen, Marianne Vestergaard, Sara Ellison, Sebastian L\\`opez, Serena Perrotta, Stefano Cristiani, Trystyn A. M. Berg, Valentina D'Odorico","submitted_at":"2016-05-15T21:39:48Z","abstract_excerpt":"We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or velocity cut-off. We analyze the spectra of 100 quasars with 3.5 < z$\\rm_{em}$ < 4.5, observed with X-shooter/VLT in the context of the XQ-100 Legacy Survey. We detect a $\\sim$ 8 $\\sigma$ excess in the number density of absorbers within 10,000 km/s of the quasar emission redshift with respect to the random occurrence of NALs. This excess does not show a depe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.04607","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":"1605.04607","created_at":"2026-05-18T01:05:43.233117+00:00"},{"alias_kind":"arxiv_version","alias_value":"1605.04607v1","created_at":"2026-05-18T01:05:43.233117+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.04607","created_at":"2026-05-18T01:05:43.233117+00:00"},{"alias_kind":"pith_short_12","alias_value":"OVFNTZKQZL6R","created_at":"2026-05-18T12:30:36.002864+00:00"},{"alias_kind":"pith_short_16","alias_value":"OVFNTZKQZL6RTG67","created_at":"2026-05-18T12:30:36.002864+00:00"},{"alias_kind":"pith_short_8","alias_value":"OVFNTZKQ","created_at":"2026-05-18T12:30:36.002864+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/OVFNTZKQZL6RTG67C2NSQRB632","json":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632.json","graph_json":"https://pith.science/api/pith-number/OVFNTZKQZL6RTG67C2NSQRB632/graph.json","events_json":"https://pith.science/api/pith-number/OVFNTZKQZL6RTG67C2NSQRB632/events.json","paper":"https://pith.science/paper/OVFNTZKQ"},"agent_actions":{"view_html":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632","download_json":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632.json","view_paper":"https://pith.science/paper/OVFNTZKQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1605.04607&json=true","fetch_graph":"https://pith.science/api/pith-number/OVFNTZKQZL6RTG67C2NSQRB632/graph.json","fetch_events":"https://pith.science/api/pith-number/OVFNTZKQZL6RTG67C2NSQRB632/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/action/storage_attestation","attest_author":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/action/author_attestation","sign_citation":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/action/citation_signature","submit_replication":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/action/replication_record"}},"created_at":"2026-05-18T01:05:43.233117+00:00","updated_at":"2026-05-18T01:05:43.233117+00:00"}