{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:T5II4RKY4ZYO5ZVTUUPTPZO2VQ","short_pith_number":"pith:T5II4RKY","canonical_record":{"source":{"id":"astro-ph/9811150","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-10T09:38:21Z","cross_cats_sorted":[],"title_canon_sha256":"49133b95ccc32a3d1d768c95b41c37926838a9028b685e4797e22addd4e29bc4","abstract_canon_sha256":"73f1001819b8609bfb8170bc1551b92d29560708dccd6a8e240862106340a97e"},"schema_version":"1.0"},"canonical_sha256":"9f508e4558e670eee6b3a51f37e5daac2cc476e811d1c34c166e6fcbfaaccc13","source":{"kind":"arxiv","id":"astro-ph/9811150","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9811150","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9811150v1","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9811150","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"pith_short_12","alias_value":"T5II4RKY4ZYO","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"pith_short_16","alias_value":"T5II4RKY4ZYO5ZVT","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"pith_short_8","alias_value":"T5II4RKY","created_at":"2026-07-04T14:16:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:T5II4RKY4ZYO5ZVTUUPTPZO2VQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9811150","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-10T09:38:21Z","cross_cats_sorted":[],"title_canon_sha256":"49133b95ccc32a3d1d768c95b41c37926838a9028b685e4797e22addd4e29bc4","abstract_canon_sha256":"73f1001819b8609bfb8170bc1551b92d29560708dccd6a8e240862106340a97e"},"schema_version":"1.0"},"canonical_sha256":"9f508e4558e670eee6b3a51f37e5daac2cc476e811d1c34c166e6fcbfaaccc13","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:16:18.468254Z","signature_b64":"HbdWlKaZTd2T75MN6l16HvrcB7yyC8m6kcg9tUxUgvBDsrc9jFH+AtfhPhNXCbdcu6SuF5r+DpEseEr0qbJBCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f508e4558e670eee6b3a51f37e5daac2cc476e811d1c34c166e6fcbfaaccc13","last_reissued_at":"2026-07-04T14:16:18.467755Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:16:18.467755Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9811150","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":"2026-07-04T14:16:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jPFIIl41QZTS40++qWFCZbJnJeR5Hig2oMggais0uhvgRXCdRQPsmNrgaxAUQn/PaseaBRQ/P5gg1M8jkxW9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T13:15:06.881605Z"},"content_sha256":"09de35e5fe5c751e743579b698f85cab9e7004ba3ea94e2ce085afc79fcde494","schema_version":"1.0","event_id":"sha256:09de35e5fe5c751e743579b698f85cab9e7004ba3ea94e2ce085afc79fcde494"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:T5II4RKY4ZYO5ZVTUUPTPZO2VQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The ESO Slice Project (ESP) galaxy redshift survey: VI Groups of Galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.Blanchard, A.Cappi, A.Pisani, C.Balkowski, C.Collins, D.Maccagni, D.Proust, E.Zucca, G.Chincarini, G.M.Stirpe, G.Vettolani, G.Zamorani, H.MacGillivray, L.Guzzo, M.Mignoli, M.Ramella, R.Merighi, R.Scaramella, S.Maurogordato, V.Cayatte","submitted_at":"1998-11-10T09:38:21Z","abstract_excerpt":"In this paper we identify objectively and analyze groups of galaxies in the recently completed ESP survey. We find 231 groups above the number overdensity threshold delta(rho)/rho=80 in the redshift range 5000<cz <60000 km/s. These groups contain 1250 members, 40.5% of the 3085 ESP galaxies within the same redshift range. The median velocity dispersion (corrected for measurement errors and computed at the redshift of the group) is sigma_{ESP,median} = 194 km/s. We show that our result is reliable in spite of the particular geometry of the ESP survey (two rows of tangent circular fields of radi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9811150","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9811150/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T14:16:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VUSzhkGg3FxLcUWn+5yk2jAdhUeG3NZ02k11u45gQQUUxdXYOkgH8IEail34yq6ib+h8DKawdkznz4KbjYzsCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T13:15:06.881972Z"},"content_sha256":"6da3316509b5de7a6f0ccd41b5bd08307d93eb6fdb1842cca884e44c136469a7","schema_version":"1.0","event_id":"sha256:6da3316509b5de7a6f0ccd41b5bd08307d93eb6fdb1842cca884e44c136469a7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ/bundle.json","state_url":"https://pith.science/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ/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":"2026-07-10T13:15:06Z","links":{"resolver":"https://pith.science/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ","bundle":"https://pith.science/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ/bundle.json","state":"https://pith.science/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T5II4RKY4ZYO5ZVTUUPTPZO2VQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:T5II4RKY4ZYO5ZVTUUPTPZO2VQ","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":"73f1001819b8609bfb8170bc1551b92d29560708dccd6a8e240862106340a97e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-10T09:38:21Z","title_canon_sha256":"49133b95ccc32a3d1d768c95b41c37926838a9028b685e4797e22addd4e29bc4"},"schema_version":"1.0","source":{"id":"astro-ph/9811150","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9811150","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9811150v1","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9811150","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"pith_short_12","alias_value":"T5II4RKY4ZYO","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"pith_short_16","alias_value":"T5II4RKY4ZYO5ZVT","created_at":"2026-07-04T14:16:18Z"},{"alias_kind":"pith_short_8","alias_value":"T5II4RKY","created_at":"2026-07-04T14:16:18Z"}],"graph_snapshots":[{"event_id":"sha256:6da3316509b5de7a6f0ccd41b5bd08307d93eb6fdb1842cca884e44c136469a7","target":"graph","created_at":"2026-07-04T14:16:18Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9811150/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper we identify objectively and analyze groups of galaxies in the recently completed ESP survey. We find 231 groups above the number overdensity threshold delta(rho)/rho=80 in the redshift range 5000<cz <60000 km/s. These groups contain 1250 members, 40.5% of the 3085 ESP galaxies within the same redshift range. The median velocity dispersion (corrected for measurement errors and computed at the redshift of the group) is sigma_{ESP,median} = 194 km/s. We show that our result is reliable in spite of the particular geometry of the ESP survey (two rows of tangent circular fields of radi","authors_text":"A.Blanchard, A.Cappi, A.Pisani, C.Balkowski, C.Collins, D.Maccagni, D.Proust, E.Zucca, G.Chincarini, G.M.Stirpe, G.Vettolani, G.Zamorani, H.MacGillivray, L.Guzzo, M.Mignoli, M.Ramella, R.Merighi, R.Scaramella, S.Maurogordato, V.Cayatte","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-11-10T09:38:21Z","title":"The ESO Slice Project (ESP) galaxy redshift survey: VI Groups of Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9811150","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":"sha256:09de35e5fe5c751e743579b698f85cab9e7004ba3ea94e2ce085afc79fcde494","target":"record","created_at":"2026-07-04T14:16:18Z","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":"73f1001819b8609bfb8170bc1551b92d29560708dccd6a8e240862106340a97e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-10T09:38:21Z","title_canon_sha256":"49133b95ccc32a3d1d768c95b41c37926838a9028b685e4797e22addd4e29bc4"},"schema_version":"1.0","source":{"id":"astro-ph/9811150","kind":"arxiv","version":1}},"canonical_sha256":"9f508e4558e670eee6b3a51f37e5daac2cc476e811d1c34c166e6fcbfaaccc13","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f508e4558e670eee6b3a51f37e5daac2cc476e811d1c34c166e6fcbfaaccc13","first_computed_at":"2026-07-04T14:16:18.467755Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:16:18.467755Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HbdWlKaZTd2T75MN6l16HvrcB7yyC8m6kcg9tUxUgvBDsrc9jFH+AtfhPhNXCbdcu6SuF5r+DpEseEr0qbJBCw==","signature_status":"signed_v1","signed_at":"2026-07-04T14:16:18.468254Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9811150","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09de35e5fe5c751e743579b698f85cab9e7004ba3ea94e2ce085afc79fcde494","sha256:6da3316509b5de7a6f0ccd41b5bd08307d93eb6fdb1842cca884e44c136469a7"],"state_sha256":"20deac058146838391b0a779c9340dee5a14ac78a19cf73849689fc8dbf45e32"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7rsVHDO4k0nbqgFo2PgiGeu/KmVuoKlId2t8mfkJDZVRaeLNKjh9b9QQXH2UKeWWoOLYr69KlVyCEHXfQZLbBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T13:15:06.883842Z","bundle_sha256":"5433d79864aa9342a3450b5f9908b143369259ccc95993ad37c2d88ff59b6bcb"}}