{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:PADPUKV7Y7QQVVXGNDMZOSFCW2","short_pith_number":"pith:PADPUKV7","canonical_record":{"source":{"id":"astro-ph/9806294","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-22T16:32:42Z","cross_cats_sorted":[],"title_canon_sha256":"4e6993c2bbd872ff48906166402b0315ff2cfcba14ee3ba04651cb6ddbc4725b","abstract_canon_sha256":"022303f12d8c408d557d837a312b2f82d43a17b7dea85e26a5f7d8622cd2d39d"},"schema_version":"1.0"},"canonical_sha256":"7806fa2abfc7e10ad6e668d99748a2b6989a5cb7afe89fcfb1e510e69c434a1a","source":{"kind":"arxiv","id":"astro-ph/9806294","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9806294","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9806294v1","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9806294","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"pith_short_12","alias_value":"PADPUKV7Y7QQ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"PADPUKV7Y7QQVVXG","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"PADPUKV7","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:PADPUKV7Y7QQVVXGNDMZOSFCW2","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9806294","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-22T16:32:42Z","cross_cats_sorted":[],"title_canon_sha256":"4e6993c2bbd872ff48906166402b0315ff2cfcba14ee3ba04651cb6ddbc4725b","abstract_canon_sha256":"022303f12d8c408d557d837a312b2f82d43a17b7dea85e26a5f7d8622cd2d39d"},"schema_version":"1.0"},"canonical_sha256":"7806fa2abfc7e10ad6e668d99748a2b6989a5cb7afe89fcfb1e510e69c434a1a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:37.305945Z","signature_b64":"qWeQ2XIV9a3SMmU/rWIeth/sQ1jIEOJlrrj2J4QbwDhaR+9ZvjVq51gzvzVkqlLs4UjO/6RPHbCeidPXXJuSBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7806fa2abfc7e10ad6e668d99748a2b6989a5cb7afe89fcfb1e510e69c434a1a","last_reissued_at":"2026-05-18T01:07:37.305498Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:37.305498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9806294","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":"2026-05-18T01:07:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZHJpm5+lzVKV87cP8KTf/QjtIAOyCye710hGwFIwgk5cDK7g7lmpPj+FjYru7zhTr3J27+pwuTmufBYxCP77DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:05:27.843228Z"},"content_sha256":"e60c7aee264832d1b5b4419010c8dfa50baef7790d614280b6f8613461bf1f3d","schema_version":"1.0","event_id":"sha256:e60c7aee264832d1b5b4419010c8dfa50baef7790d614280b6f8613461bf1f3d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:PADPUKV7Y7QQVVXGNDMZOSFCW2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A substructure analysis of the A3558 cluster complex","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.Pisani, E.Zucca, G.Zamorani, M.Ramella, S.Bardelli","submitted_at":"1998-06-22T16:32:42Z","abstract_excerpt":"The \"algorithm driven by the density estimate for the identification of clusters\" (DEDICA, Pisani 1993, 1996) is applied to the A3558 cluster complex in order to find substructures. This complex, located at the center of the Shapley Concentration supercluster, is a chain formed by the ACO clusters A3556, A3558 and A3562 and the two poor clusters SC 1327-312 and SC 1329-313.\n We find a large number of clumps, indicating that strong dynamical processes are active. In particular, it is necessary to use a fully three-dimensional sample(i.e. using the galaxy velocity as third coordinate) in order t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806294","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":"2026-05-18T01:07:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o1qKYAEPai2P2FiqENqA6q0M+WuRLbwgxi2uj9lpsoEGApyDvxyXw9HYJkr6+chFhSwywQ+dbjRNS2Masd32DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:05:27.843591Z"},"content_sha256":"d47ae9995ea320dac1011e9f8c18a8ff71f08ff738ed2e53b5a7f3c81b6ed629","schema_version":"1.0","event_id":"sha256:d47ae9995ea320dac1011e9f8c18a8ff71f08ff738ed2e53b5a7f3c81b6ed629"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2/bundle.json","state_url":"https://pith.science/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2/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":"2026-05-28T03:05:27Z","links":{"resolver":"https://pith.science/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2","bundle":"https://pith.science/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2/bundle.json","state":"https://pith.science/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PADPUKV7Y7QQVVXGNDMZOSFCW2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:PADPUKV7Y7QQVVXGNDMZOSFCW2","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":"022303f12d8c408d557d837a312b2f82d43a17b7dea85e26a5f7d8622cd2d39d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-22T16:32:42Z","title_canon_sha256":"4e6993c2bbd872ff48906166402b0315ff2cfcba14ee3ba04651cb6ddbc4725b"},"schema_version":"1.0","source":{"id":"astro-ph/9806294","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9806294","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9806294v1","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9806294","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"pith_short_12","alias_value":"PADPUKV7Y7QQ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"PADPUKV7Y7QQVVXG","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"PADPUKV7","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:d47ae9995ea320dac1011e9f8c18a8ff71f08ff738ed2e53b5a7f3c81b6ed629","target":"graph","created_at":"2026-05-18T01:07:37Z","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":"The \"algorithm driven by the density estimate for the identification of clusters\" (DEDICA, Pisani 1993, 1996) is applied to the A3558 cluster complex in order to find substructures. This complex, located at the center of the Shapley Concentration supercluster, is a chain formed by the ACO clusters A3556, A3558 and A3562 and the two poor clusters SC 1327-312 and SC 1329-313.\n We find a large number of clumps, indicating that strong dynamical processes are active. In particular, it is necessary to use a fully three-dimensional sample(i.e. using the galaxy velocity as third coordinate) in order t","authors_text":"A.Pisani, E.Zucca, G.Zamorani, M.Ramella, S.Bardelli","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-06-22T16:32:42Z","title":"A substructure analysis of the A3558 cluster complex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806294","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:e60c7aee264832d1b5b4419010c8dfa50baef7790d614280b6f8613461bf1f3d","target":"record","created_at":"2026-05-18T01:07:37Z","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":"022303f12d8c408d557d837a312b2f82d43a17b7dea85e26a5f7d8622cd2d39d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-22T16:32:42Z","title_canon_sha256":"4e6993c2bbd872ff48906166402b0315ff2cfcba14ee3ba04651cb6ddbc4725b"},"schema_version":"1.0","source":{"id":"astro-ph/9806294","kind":"arxiv","version":1}},"canonical_sha256":"7806fa2abfc7e10ad6e668d99748a2b6989a5cb7afe89fcfb1e510e69c434a1a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7806fa2abfc7e10ad6e668d99748a2b6989a5cb7afe89fcfb1e510e69c434a1a","first_computed_at":"2026-05-18T01:07:37.305498Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:37.305498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qWeQ2XIV9a3SMmU/rWIeth/sQ1jIEOJlrrj2J4QbwDhaR+9ZvjVq51gzvzVkqlLs4UjO/6RPHbCeidPXXJuSBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:37.305945Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9806294","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e60c7aee264832d1b5b4419010c8dfa50baef7790d614280b6f8613461bf1f3d","sha256:d47ae9995ea320dac1011e9f8c18a8ff71f08ff738ed2e53b5a7f3c81b6ed629"],"state_sha256":"9c30b9e58cc8f76bbb256acb19123562b9884a590be1e1a2037ce2402c17f033"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qWvG0L9osQz9BKmckAWp02BcDJqi6KDt6TtAML+OASC2B19WwBP3P0fy9McMjGutaH79rjhWrQD5WBOZXfrnBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:05:27.845547Z","bundle_sha256":"92b70340c3d700ba739017432171f2bf51c709aee599f2afc53edf23e5a59cb3"}}