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The faint, $F_{2-10 keV} \\approx 2.4 \\times 10^{-13} \\ergscm2$, X-ray source 1SAXJ0027.2-1930, $\\sim 2$ arcmin away from the optical position of the cluster as given in the Abell catalogue, is identified with the central region of"},"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/0002224","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-02-10T12:32:17Z","cross_cats_sorted":[],"title_canon_sha256":"230c155e1dd9e4fc2b9c99422ac5f9ac1aa53152c360c17a6e2dfb854961de3e","abstract_canon_sha256":"00c2cd9fe6665d63d9019f3925355fa8d81f65a7dc17150aeac73237a086641a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:57:13.060329Z","signature_b64":"lO3ULN0c0wrgLz+RgLjt/r6TqX756gmAJstKqqfBjawRjMOsa6Ih4FjyYVenWQnqRlXBRdBWjlHKmneYMWbRCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fbb3a7651a732e91aa2ca46a906f7938bbc3a9d8d5d250671935eea614c6cce","last_reissued_at":"2026-07-04T23:57:13.059840Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:57:13.059840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"An X-ray and optical study of the cluster A33","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. 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