{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:OBXXU4XPWZRRHEY66FVR2CAMY7","short_pith_number":"pith:OBXXU4XP","canonical_record":{"source":{"id":"0905.3392","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-20T22:01:30Z","cross_cats_sorted":[],"title_canon_sha256":"a9dfafc2883df73aee5a450e2e6a8ea91892ab9a2045baff1bebec5d44163ecc","abstract_canon_sha256":"2f580e98eeca23ae8bf2f4b777a94f84264366396afc8757cc5730f750010eec"},"schema_version":"1.0"},"canonical_sha256":"706f7a72efb66313931ef16b1d080cc7c08f35b025872063faf750d047be482e","source":{"kind":"arxiv","id":"0905.3392","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.3392","created_at":"2026-05-18T02:13:38Z"},{"alias_kind":"arxiv_version","alias_value":"0905.3392v1","created_at":"2026-05-18T02:13:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3392","created_at":"2026-05-18T02:13:38Z"},{"alias_kind":"pith_short_12","alias_value":"OBXXU4XPWZRR","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"OBXXU4XPWZRRHEY6","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"OBXXU4XP","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:OBXXU4XPWZRRHEY66FVR2CAMY7","target":"record","payload":{"canonical_record":{"source":{"id":"0905.3392","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-20T22:01:30Z","cross_cats_sorted":[],"title_canon_sha256":"a9dfafc2883df73aee5a450e2e6a8ea91892ab9a2045baff1bebec5d44163ecc","abstract_canon_sha256":"2f580e98eeca23ae8bf2f4b777a94f84264366396afc8757cc5730f750010eec"},"schema_version":"1.0"},"canonical_sha256":"706f7a72efb66313931ef16b1d080cc7c08f35b025872063faf750d047be482e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:38.306752Z","signature_b64":"6GBWOvMFadU99gPv8XlWaFa2Gv0RM3jQYxlDSCExV31gvOXOgZkTL+VXEO95EK7FrYLFabL5FeelQpXbXpQQAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"706f7a72efb66313931ef16b1d080cc7c08f35b025872063faf750d047be482e","last_reissued_at":"2026-05-18T02:13:38.306188Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:38.306188Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.3392","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":"2026-05-18T02:13:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P3O2JhuL7QHvVK4OAGtoJg6s4pLyAu70lM2LxCySVjSgZ+SgiotGWUB+9uAmbdTDQUI7TUhF4yss5p+0yXryBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:14:11.372268Z"},"content_sha256":"a3f441368069093617b5a34c9623c59979dd584539d20fff5f19b170cf30a49b","schema_version":"1.0","event_id":"sha256:a3f441368069093617b5a34c9623c59979dd584539d20fff5f19b170cf30a49b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:OBXXU4XPWZRRHEY66FVR2CAMY7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Recent Arrival of Faint Cluster Galaxies on the Red-sequence: Luminosity Functions from 119 square degrees of CFHTLS","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Adam Bognat (University of Waterloo), David G. Gilbank, Michael L. Balogh, Ting Lu","submitted_at":"2009-05-20T22:01:30Z","abstract_excerpt":"The global star formation rate has decreased significantly since z ~ 1, for reasons that are not well understood. Red-sequence galaxies, dominating in galaxy clusters, represent the population that have had their star formation shut off, and may therefore be the key to this problem. In this work, we select 127 rich galaxy clusters at 0.17<z<0.36, from 119 square degrees of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) optical imaging data, and construct the r'-band red-sequence luminosity functions (LFs). We show that the faint end of the LF is very sensitive to how red-sequence ga"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3392","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":"2026-05-18T02:13:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aUR36P6da05b2J7jMVqhJExR3IM5zXJEUncKsEZynP46v0K5hcVw74IPk9dw25XcwV2yunBI5WOPdqVU8qsNAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:14:11.372638Z"},"content_sha256":"e18cafe14516a5b56d4551ed8b30e1819a9b54b037597069100602bf16477575","schema_version":"1.0","event_id":"sha256:e18cafe14516a5b56d4551ed8b30e1819a9b54b037597069100602bf16477575"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OBXXU4XPWZRRHEY66FVR2CAMY7/bundle.json","state_url":"https://pith.science/pith/OBXXU4XPWZRRHEY66FVR2CAMY7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OBXXU4XPWZRRHEY66FVR2CAMY7/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":"2026-05-31T07:14:11Z","links":{"resolver":"https://pith.science/pith/OBXXU4XPWZRRHEY66FVR2CAMY7","bundle":"https://pith.science/pith/OBXXU4XPWZRRHEY66FVR2CAMY7/bundle.json","state":"https://pith.science/pith/OBXXU4XPWZRRHEY66FVR2CAMY7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OBXXU4XPWZRRHEY66FVR2CAMY7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:OBXXU4XPWZRRHEY66FVR2CAMY7","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":"2f580e98eeca23ae8bf2f4b777a94f84264366396afc8757cc5730f750010eec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-20T22:01:30Z","title_canon_sha256":"a9dfafc2883df73aee5a450e2e6a8ea91892ab9a2045baff1bebec5d44163ecc"},"schema_version":"1.0","source":{"id":"0905.3392","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.3392","created_at":"2026-05-18T02:13:38Z"},{"alias_kind":"arxiv_version","alias_value":"0905.3392v1","created_at":"2026-05-18T02:13:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3392","created_at":"2026-05-18T02:13:38Z"},{"alias_kind":"pith_short_12","alias_value":"OBXXU4XPWZRR","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"OBXXU4XPWZRRHEY6","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"OBXXU4XP","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:e18cafe14516a5b56d4551ed8b30e1819a9b54b037597069100602bf16477575","target":"graph","created_at":"2026-05-18T02:13:38Z","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 global star formation rate has decreased significantly since z ~ 1, for reasons that are not well understood. Red-sequence galaxies, dominating in galaxy clusters, represent the population that have had their star formation shut off, and may therefore be the key to this problem. In this work, we select 127 rich galaxy clusters at 0.17<z<0.36, from 119 square degrees of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) optical imaging data, and construct the r'-band red-sequence luminosity functions (LFs). We show that the faint end of the LF is very sensitive to how red-sequence ga","authors_text":"Adam Bognat (University of Waterloo), David G. Gilbank, Michael L. Balogh, Ting Lu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-20T22:01:30Z","title":"Recent Arrival of Faint Cluster Galaxies on the Red-sequence: Luminosity Functions from 119 square degrees of CFHTLS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3392","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:a3f441368069093617b5a34c9623c59979dd584539d20fff5f19b170cf30a49b","target":"record","created_at":"2026-05-18T02:13:38Z","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":"2f580e98eeca23ae8bf2f4b777a94f84264366396afc8757cc5730f750010eec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-20T22:01:30Z","title_canon_sha256":"a9dfafc2883df73aee5a450e2e6a8ea91892ab9a2045baff1bebec5d44163ecc"},"schema_version":"1.0","source":{"id":"0905.3392","kind":"arxiv","version":1}},"canonical_sha256":"706f7a72efb66313931ef16b1d080cc7c08f35b025872063faf750d047be482e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"706f7a72efb66313931ef16b1d080cc7c08f35b025872063faf750d047be482e","first_computed_at":"2026-05-18T02:13:38.306188Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:38.306188Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6GBWOvMFadU99gPv8XlWaFa2Gv0RM3jQYxlDSCExV31gvOXOgZkTL+VXEO95EK7FrYLFabL5FeelQpXbXpQQAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:38.306752Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.3392","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3f441368069093617b5a34c9623c59979dd584539d20fff5f19b170cf30a49b","sha256:e18cafe14516a5b56d4551ed8b30e1819a9b54b037597069100602bf16477575"],"state_sha256":"36ef4dc78b0f3a34955b1444c31eeca984cce03498eca4e78b4d39b7f3ff61f8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SK3VVmi0h0npVXfwJPGN54027nI8IGpB5wTdpIQ9QLsw6OAKOa4s59pwxMR/E3uvwyNKfMQLu9oHzuApcOgSBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:14:11.374674Z","bundle_sha256":"73938edbbd0b570b6aee3088daef3fbb9c0e50b5598c03fe5f3f2bd8a0fc0e68"}}