{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:XE4JMTI6PHVX4YCHDNOMDRV2A7","short_pith_number":"pith:XE4JMTI6","canonical_record":{"source":{"id":"astro-ph/0212312","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-12-13T18:22:31Z","cross_cats_sorted":[],"title_canon_sha256":"b2533f3de512a8aaf3b6a5f748c7bb478f74124d0a38d0ce1acb9f9a31369007","abstract_canon_sha256":"dd0703572374008a6f18c2f16155184b44681545d173ddbb41c2d0386b1c7c25"},"schema_version":"1.0"},"canonical_sha256":"b938964d1e79eb7e60471b5cc1c6ba07ed68845c26c5384433b0161cfee2e95a","source":{"kind":"arxiv","id":"astro-ph/0212312","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0212312","created_at":"2026-05-18T04:27:34Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0212312v1","created_at":"2026-05-18T04:27:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0212312","created_at":"2026-05-18T04:27:34Z"},{"alias_kind":"pith_short_12","alias_value":"XE4JMTI6PHVX","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"XE4JMTI6PHVX4YCH","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"XE4JMTI6","created_at":"2026-05-18T12:25:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:XE4JMTI6PHVX4YCHDNOMDRV2A7","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0212312","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-12-13T18:22:31Z","cross_cats_sorted":[],"title_canon_sha256":"b2533f3de512a8aaf3b6a5f748c7bb478f74124d0a38d0ce1acb9f9a31369007","abstract_canon_sha256":"dd0703572374008a6f18c2f16155184b44681545d173ddbb41c2d0386b1c7c25"},"schema_version":"1.0"},"canonical_sha256":"b938964d1e79eb7e60471b5cc1c6ba07ed68845c26c5384433b0161cfee2e95a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:34.639232Z","signature_b64":"wkx8c3d4ST8XGmnOPeLmQl9Kvg3FLbTY/LIxrY2gSKSPxs8lbkT2r6xaO5vEM+cY1VTZmrxrymton2F13tBhCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b938964d1e79eb7e60471b5cc1c6ba07ed68845c26c5384433b0161cfee2e95a","last_reissued_at":"2026-05-18T04:27:34.638532Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:34.638532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0212312","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:27:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZuDKUkomcmkR093ymheJBon6jANwFRHVcyoESXLIA/mnjYEuumoA/d6CUPsZKvBfHMU6c/EAugyiVq8Z38DpCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T19:11:55.211496Z"},"content_sha256":"8b28dbf9dcb68619d3e0d75542ac47c044478ef38f1eec114f13ad6644c447ac","schema_version":"1.0","event_id":"sha256:8b28dbf9dcb68619d3e0d75542ac47c044478ef38f1eec114f13ad6644c447ac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:XE4JMTI6PHVX4YCHDNOMDRV2A7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Clusters and Superclusters in the Sloan Digital Sky Survey","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. L. Tucker, E. Saar, G. H\"utsi, J. Einasto, M. Einasto, P. Hein\"am\"aki, S. S. Allam, V. M\"uller","submitted_at":"2002-12-13T18:22:31Z","abstract_excerpt":"Two-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey with a smoothing lengths 0.8 h^{-1} Mpc is applied to extract clusters of galaxies, and a low-resolution field with smoothing lengths 10^{-1} Mpc to extract superclusters of galaxies. We compare properties of density field clusters and superclusters with Abell clusters, and superclusters found on the basis of Abell clusters. We found that clusters in high-density environment have a luminosity a factor of about 5 higher than in low-density environment. There exists a large anisotr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0212312","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:27:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rpzq+yMg4KxFJqfFsUqZ+1CGK0dUBI4OgREVnGkLIX1DUDaGQTY3VUKny5DwsLDF54PHE9ZtGhEgjyixI2i9Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T19:11:55.212208Z"},"content_sha256":"f51682191eeffe28c6caa7bd025c968a9cca16df22724096e957ecb1d7640fba","schema_version":"1.0","event_id":"sha256:f51682191eeffe28c6caa7bd025c968a9cca16df22724096e957ecb1d7640fba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7/bundle.json","state_url":"https://pith.science/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-29T19:11:55Z","links":{"resolver":"https://pith.science/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7","bundle":"https://pith.science/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7/bundle.json","state":"https://pith.science/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XE4JMTI6PHVX4YCHDNOMDRV2A7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:XE4JMTI6PHVX4YCHDNOMDRV2A7","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"dd0703572374008a6f18c2f16155184b44681545d173ddbb41c2d0386b1c7c25","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-12-13T18:22:31Z","title_canon_sha256":"b2533f3de512a8aaf3b6a5f748c7bb478f74124d0a38d0ce1acb9f9a31369007"},"schema_version":"1.0","source":{"id":"astro-ph/0212312","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0212312","created_at":"2026-05-18T04:27:34Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0212312v1","created_at":"2026-05-18T04:27:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0212312","created_at":"2026-05-18T04:27:34Z"},{"alias_kind":"pith_short_12","alias_value":"XE4JMTI6PHVX","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"XE4JMTI6PHVX4YCH","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"XE4JMTI6","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:f51682191eeffe28c6caa7bd025c968a9cca16df22724096e957ecb1d7640fba","target":"graph","created_at":"2026-05-18T04:27:34Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Two-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey with a smoothing lengths 0.8 h^{-1} Mpc is applied to extract clusters of galaxies, and a low-resolution field with smoothing lengths 10^{-1} Mpc to extract superclusters of galaxies. We compare properties of density field clusters and superclusters with Abell clusters, and superclusters found on the basis of Abell clusters. We found that clusters in high-density environment have a luminosity a factor of about 5 higher than in low-density environment. There exists a large anisotr","authors_text":"D. L. Tucker, E. Saar, G. H\"utsi, J. Einasto, M. Einasto, P. Hein\"am\"aki, S. S. Allam, V. M\"uller","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-12-13T18:22:31Z","title":"Clusters and Superclusters in the Sloan Digital Sky Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0212312","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:8b28dbf9dcb68619d3e0d75542ac47c044478ef38f1eec114f13ad6644c447ac","target":"record","created_at":"2026-05-18T04:27:34Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"dd0703572374008a6f18c2f16155184b44681545d173ddbb41c2d0386b1c7c25","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-12-13T18:22:31Z","title_canon_sha256":"b2533f3de512a8aaf3b6a5f748c7bb478f74124d0a38d0ce1acb9f9a31369007"},"schema_version":"1.0","source":{"id":"astro-ph/0212312","kind":"arxiv","version":1}},"canonical_sha256":"b938964d1e79eb7e60471b5cc1c6ba07ed68845c26c5384433b0161cfee2e95a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b938964d1e79eb7e60471b5cc1c6ba07ed68845c26c5384433b0161cfee2e95a","first_computed_at":"2026-05-18T04:27:34.638532Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:34.638532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wkx8c3d4ST8XGmnOPeLmQl9Kvg3FLbTY/LIxrY2gSKSPxs8lbkT2r6xaO5vEM+cY1VTZmrxrymton2F13tBhCA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:34.639232Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0212312","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8b28dbf9dcb68619d3e0d75542ac47c044478ef38f1eec114f13ad6644c447ac","sha256:f51682191eeffe28c6caa7bd025c968a9cca16df22724096e957ecb1d7640fba"],"state_sha256":"37cf24deb396fea63862753b13c462a93437bfb7e5d8ccac07aa557ae81a7c14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LgKDJ33KyjpqVAePxaEwMwX4UksPDe3DbkprG5k43HmggX8LlGXA2XmA2TMryFjBbKFKbFnYvQNcZm4Mv2ziAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T19:11:55.216575Z","bundle_sha256":"5a10716350d62a13a54d5142fc9f857ff05c58c3baacfab56e91f978cbdb7abb"}}