{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:6HG5OAYC76UTKURDFSMDLC4AZV","short_pith_number":"pith:6HG5OAYC","canonical_record":{"source":{"id":"astro-ph/0402566","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-24T14:33:42Z","cross_cats_sorted":[],"title_canon_sha256":"639d088820776f11b97273408c841a55c9a2f06f0428fd52be01bcfe82125514","abstract_canon_sha256":"673c8f36083eb4b64b4ef0311618550b90af8932c79b52a03ef99b7bbe6e4569"},"schema_version":"1.0"},"canonical_sha256":"f1cdd70302ffa93552232c98358b80cd678b577f2014f86c1f43e2b589e8a2a2","source":{"kind":"arxiv","id":"astro-ph/0402566","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0402566","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0402566v2","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0402566","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"pith_short_12","alias_value":"6HG5OAYC76UT","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"6HG5OAYC76UTKURD","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"6HG5OAYC","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:6HG5OAYC76UTKURDFSMDLC4AZV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0402566","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-24T14:33:42Z","cross_cats_sorted":[],"title_canon_sha256":"639d088820776f11b97273408c841a55c9a2f06f0428fd52be01bcfe82125514","abstract_canon_sha256":"673c8f36083eb4b64b4ef0311618550b90af8932c79b52a03ef99b7bbe6e4569"},"schema_version":"1.0"},"canonical_sha256":"f1cdd70302ffa93552232c98358b80cd678b577f2014f86c1f43e2b589e8a2a2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:04.627479Z","signature_b64":"YBJRJ5HeDEvb+lRIJiGhygNcseOt6Fr5O70ml2zh3mIoScujt+NwWL02t2gbIkJE8bwoGgigCeNxgfEEMTG2BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f1cdd70302ffa93552232c98358b80cd678b577f2014f86c1f43e2b589e8a2a2","last_reissued_at":"2026-05-18T04:27:04.626770Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:04.626770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0402566","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:27:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y8PRghPxOj4tUZ8QndPi3Qfa65lb99FSKF9YceHKQQIbNPs+1UhMn7fj6N/ChGuQBroBI68o/LLSK0T9k+SbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T17:38:52.097024Z"},"content_sha256":"6d923f618e86dbca2b69fb7b91b6476a085bb509b6f535c854e196eb30374a6b","schema_version":"1.0","event_id":"sha256:6d923f618e86dbca2b69fb7b91b6476a085bb509b6f535c854e196eb30374a6b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:6HG5OAYC76UTKURDFSMDLC4AZV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxy groups in the 2dFGRS: the luminous content of the groups","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. A. Peterson, C. Collins, C. Jackson, C. M. Baugh, C. S. Frenk, D. Madgwick, G. Dalton, G. Efstathiou, I. K. Baldry, I. Lewis, J. A. Peacock, J. Bland-Hawthorn, K. Glazebrook, K. Taylor (the 2dFGRS Team), M. Colless, O. Lahav, P. Norberg, R. Cannon, R. De Propris, R. S. Ellis, S. Cole, S. Lumsden, S. Maddox, S. P. Driver, T. Bridges, V. R. Eke, W. Couch, W. Sutherland","submitted_at":"2004-02-24T14:33:42Z","abstract_excerpt":"The 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue of ~29000 objects is used to study the luminous content of galaxy systems of various sizes. Mock galaxy catalogues constructed from cosmological simulations are used to gauge the accuracy with which intrinsic group properties can be recovered. A Schechter function is found to be a reasonable fit to the galaxy luminosity functions in groups of different mass in the real data. The characteristic luminosity L* is larger for more massive groups. However, the mock data show that the shape of the recovered luminosity function is expected"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0402566","kind":"arxiv","version":2},"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":"2026-05-18T04:27:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Oqn7T6jnWt0aFPbDZ9MTnGjD2h/sBh9TC2PYyM9BDjlgvU3b1Hr3Jmlz2M69JXpRBdXeMK7Bj0swliOBakkoDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T17:38:52.097728Z"},"content_sha256":"bd5fb17da6e750b0400ebac5f016f55cd2503ff4c2cef33dbe851987e47fb65f","schema_version":"1.0","event_id":"sha256:bd5fb17da6e750b0400ebac5f016f55cd2503ff4c2cef33dbe851987e47fb65f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6HG5OAYC76UTKURDFSMDLC4AZV/bundle.json","state_url":"https://pith.science/pith/6HG5OAYC76UTKURDFSMDLC4AZV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6HG5OAYC76UTKURDFSMDLC4AZV/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":"2026-05-25T17:38:52Z","links":{"resolver":"https://pith.science/pith/6HG5OAYC76UTKURDFSMDLC4AZV","bundle":"https://pith.science/pith/6HG5OAYC76UTKURDFSMDLC4AZV/bundle.json","state":"https://pith.science/pith/6HG5OAYC76UTKURDFSMDLC4AZV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6HG5OAYC76UTKURDFSMDLC4AZV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:6HG5OAYC76UTKURDFSMDLC4AZV","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":"673c8f36083eb4b64b4ef0311618550b90af8932c79b52a03ef99b7bbe6e4569","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-24T14:33:42Z","title_canon_sha256":"639d088820776f11b97273408c841a55c9a2f06f0428fd52be01bcfe82125514"},"schema_version":"1.0","source":{"id":"astro-ph/0402566","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0402566","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0402566v2","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0402566","created_at":"2026-05-18T04:27:04Z"},{"alias_kind":"pith_short_12","alias_value":"6HG5OAYC76UT","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"6HG5OAYC76UTKURD","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"6HG5OAYC","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:bd5fb17da6e750b0400ebac5f016f55cd2503ff4c2cef33dbe851987e47fb65f","target":"graph","created_at":"2026-05-18T04:27:04Z","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 2dFGRS Percolation-Inferred Galaxy Group (2PIGG) catalogue of ~29000 objects is used to study the luminous content of galaxy systems of various sizes. Mock galaxy catalogues constructed from cosmological simulations are used to gauge the accuracy with which intrinsic group properties can be recovered. A Schechter function is found to be a reasonable fit to the galaxy luminosity functions in groups of different mass in the real data. The characteristic luminosity L* is larger for more massive groups. However, the mock data show that the shape of the recovered luminosity function is expected","authors_text":"B. A. Peterson, C. Collins, C. Jackson, C. M. Baugh, C. S. Frenk, D. Madgwick, G. Dalton, G. Efstathiou, I. K. Baldry, I. Lewis, J. A. Peacock, J. Bland-Hawthorn, K. Glazebrook, K. Taylor (the 2dFGRS Team), M. Colless, O. Lahav, P. Norberg, R. Cannon, R. De Propris, R. S. Ellis, S. Cole, S. Lumsden, S. Maddox, S. P. Driver, T. Bridges, V. R. Eke, W. Couch, W. Sutherland","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-02-24T14:33:42Z","title":"Galaxy groups in the 2dFGRS: the luminous content of the groups"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0402566","kind":"arxiv","version":2},"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":"sha256:6d923f618e86dbca2b69fb7b91b6476a085bb509b6f535c854e196eb30374a6b","target":"record","created_at":"2026-05-18T04:27:04Z","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":"673c8f36083eb4b64b4ef0311618550b90af8932c79b52a03ef99b7bbe6e4569","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-02-24T14:33:42Z","title_canon_sha256":"639d088820776f11b97273408c841a55c9a2f06f0428fd52be01bcfe82125514"},"schema_version":"1.0","source":{"id":"astro-ph/0402566","kind":"arxiv","version":2}},"canonical_sha256":"f1cdd70302ffa93552232c98358b80cd678b577f2014f86c1f43e2b589e8a2a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f1cdd70302ffa93552232c98358b80cd678b577f2014f86c1f43e2b589e8a2a2","first_computed_at":"2026-05-18T04:27:04.626770Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:04.626770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YBJRJ5HeDEvb+lRIJiGhygNcseOt6Fr5O70ml2zh3mIoScujt+NwWL02t2gbIkJE8bwoGgigCeNxgfEEMTG2BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:04.627479Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0402566","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d923f618e86dbca2b69fb7b91b6476a085bb509b6f535c854e196eb30374a6b","sha256:bd5fb17da6e750b0400ebac5f016f55cd2503ff4c2cef33dbe851987e47fb65f"],"state_sha256":"079d193a4f5fb90d06a8b4f02ac778ac777a7fd6ad3da06d51950fa580acb88d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DWfG4bE2y/3+qPMPZ9Vi7vR4EV0OFl+6mm1s9gl6eT33wVZIv8BdIZpYJvrNbkT82kdNsVjV/PDgdofZEuPHCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T17:38:52.101432Z","bundle_sha256":"176d7b710d762d500980ebe2229948cb3f94dd03daa342e76140cdc68429f6f1"}}