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The main lens is at redshift zl=0.222, while the inner ring (1) is at zs1=0.609 and Einstein radius $Re_1=1.43\\pm0.01\"$. The wider image separation ($Re_2=2.07\\pm 0.02\"$) of the outer ring (2) implies that it is at higher redshift. Its detection in the F814W filter implies zs2<6.9. The configuration can be well described by a total density profile $\\rho_{tot} ~ r^-g'$ with $g'=2.00\\pm0.03$ and velocity dispersion $\\sigma_{SIE}=287\\pm5\\kms$. [...] We consi"},"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":"0801.1555","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-10T08:06:16Z","cross_cats_sorted":[],"title_canon_sha256":"0fc03da4cd7917674c8c50d2aa4071e45c2b820d1107fd5d22b58c4d6271149c","abstract_canon_sha256":"267b8c76413bc536a07b01428c198030660aa937c1b1f0a295dea7a2c63dfbef"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:08:24.116176Z","signature_b64":"iFIIgFp33jDSSGbK6PXYGHjxReDMNCs/+G2uPuVqR/54hcpGnU/kXUnx8ym/N5tn7ABX0hNjKWORncCLPAvtAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5907cf01a6c0fbd4da56797c253d6d3148703010c3608d294c66a4f5ad7bbb2","last_reissued_at":"2026-07-04T17:08:24.115670Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:08:24.115670Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Sloan Lens ACS Survey. 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