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Couch","submitted_at":"2006-12-14T19:41:47Z","abstract_excerpt":"We combine the QSO samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-SDSS LRG and QSO Survey (2SLAQ) in order to investigate the clustering of z~1.4 QSOs and measure the correlation function. The clustering signal in z-space, projected along the sky direction, is similar to that previously obtained from 2QZ alone. By fitting the z-space correlation function and lifting the degeneracy between beta and Omega_m_0 by using linear theory predictions, we obtain beta(z=1.4) = 0.60+-0.12 and Omega_m_0=0.25+-0.08, implying a value for the QSO bias, b(z=1.4)=1.5+-0.2. We further find that QSO c"},"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":"astro-ph/0612401","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-14T19:41:47Z","cross_cats_sorted":[],"title_canon_sha256":"b534547aac52930de91b0cd4c7cd15c1d96aa9b3755f9dcfe664b2faf4718d26","abstract_canon_sha256":"fcf5bf49d567ee0f0ef8c66d2742e07843b1fa668e733e7648dad9fb25c0e5f1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:59:52.497339Z","signature_b64":"wvuAfHk6H+qtOxejXM6oencfBOqDvd7K4wXnDj+R7ZfDFdmkg+3O6k8fg8WGzT6c59eKad79hHu/9bYctI8RCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a2ad08b869fb76adc64a2d03dd7f8fc2d6ea64ba5174ca2d3c7f205a06f071e","last_reissued_at":"2026-07-04T16:59:52.496932Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:59:52.496932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The 2dF-SDSS LRG and QSO Survey: QSO clustering and the L-z degeneracy","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.D. 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