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The region studied includes a supercluster (with a galaxy and cluster overdensity of 3 and 15, respectively) and field clusters inside the 150 Mpc diameter surrounding region. The total dynamical mass of 10 clusters of galaxies in UMa is equal to 2.25 10^15 M_sun, and the mass of 11 clusters of galaxies in the UMa neighborhood is equal to 1.70 10^15 M_sun. The fraction of early-type galaxies brighter than M_K*+1 in the virialized region"},"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":"0912.2503","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-13T13:29:54Z","cross_cats_sorted":[],"title_canon_sha256":"667369c27a26e56fb62e94ad9df54e2d1b58fd784567ff3cd294dbca5e7f20cc","abstract_canon_sha256":"d0b87bde4c1e58254f9b4f69a125d9d9b878368d977b2d2a346231465ad6e1c1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:33.995328Z","signature_b64":"FXim/HnW7sFE2ZIiw9KyMxqMt3uhGUpe3qFMYiKn3683sFf/cdEEMh/epdvKOEi3dZwBhuWNY/Ssamo0LYNqBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bc98998b23f3f6be4e7b7e61740aa7cdb53741cb0cc6cff2f9294737552ba3ec","last_reissued_at":"2026-05-18T04:36:33.994471Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:33.994471Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Analysis of the Properties of Clusters of Galaxies in the Region of the Ursa Major Supercluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alexander I. 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