{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:S3MS5QFUIEJZP6CJNKMJZZDEOT","short_pith_number":"pith:S3MS5QFU","canonical_record":{"source":{"id":"astro-ph/0602601","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-27T21:34:43Z","cross_cats_sorted":[],"title_canon_sha256":"0f9f8f62ce694ac3c0dd9cde894c86263eb73ac44983c16a1b254da22ed5d2c2","abstract_canon_sha256":"a6f3cc442c158b62c19bf216389efb851d692f9d4c32ce6bcabf4ac024e3af06"},"schema_version":"1.0"},"canonical_sha256":"96d92ec0b4411397f8496a989ce46474d609d9949b04bfe671f72beb359a17d1","source":{"kind":"arxiv","id":"astro-ph/0602601","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0602601","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0602601v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0602601","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"S3MS5QFUIEJZ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"S3MS5QFUIEJZP6CJ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"S3MS5QFU","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:S3MS5QFUIEJZP6CJNKMJZZDEOT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0602601","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-27T21:34:43Z","cross_cats_sorted":[],"title_canon_sha256":"0f9f8f62ce694ac3c0dd9cde894c86263eb73ac44983c16a1b254da22ed5d2c2","abstract_canon_sha256":"a6f3cc442c158b62c19bf216389efb851d692f9d4c32ce6bcabf4ac024e3af06"},"schema_version":"1.0"},"canonical_sha256":"96d92ec0b4411397f8496a989ce46474d609d9949b04bfe671f72beb359a17d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:05.011218Z","signature_b64":"+nvZrKVhfA9kz3JFAPcLOLJ1/apTlmGjTZcEDQCqi9Cvpc7fKFNBkRLxvBFezmyBMdWgwpz6hb3AfnYyavYnDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"96d92ec0b4411397f8496a989ce46474d609d9949b04bfe671f72beb359a17d1","last_reissued_at":"2026-05-18T04:29:05.010808Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:05.010808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0602601","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"23EMQiysrDQWFFzaGrBkY0RJeWTFvg29MDQcvqDkYZc8TLWEGZ83dVO2pJYbVXsqCVVnVKJ2nVXtdOAt/eccDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:22:58.147736Z"},"content_sha256":"4d27ac7119ceae5420c18ee9c42c150fcba47243a308bafdf9b83e5b195b4521","schema_version":"1.0","event_id":"sha256:4d27ac7119ceae5420c18ee9c42c150fcba47243a308bafdf9b83e5b195b4521"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:S3MS5QFUIEJZP6CJNKMJZZDEOT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extragalactic Globular Clusters and Galaxy Formation","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jay Strader (UCO/Lick Observatory), Jean P. Brodie","submitted_at":"2006-02-27T21:34:43Z","abstract_excerpt":"Globular cluster (GC) systems have now been studied in galaxies ranging from dwarfs to giants and spanning the full Hubble sequence of morphological types. Imaging and spectroscopy with the Hubble Space Telescope and large ground-based telescopes have together established that most galaxies have bimodal color distributions that reflect two subpopulations of old GCs: metal-poor and metal-rich. The characteristics of both subpopulations are correlated with those of their parent galaxies. We argue that metal-poor GCs formed in low-mass dark matter halos in the early universe and that their proper"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0602601","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6gfJyR9BvK6WdwB80F1OsRh8d9NaDlRs6JIkab6Co6+BuOXgfytqaNAgdWSlacXkXSEZc4Npbda+pf6BdQDYCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:22:58.148084Z"},"content_sha256":"e5ac20a0bdd4fbcc5897f5e0fa2a348a042c7315e4942c644929d3c893bf38c0","schema_version":"1.0","event_id":"sha256:e5ac20a0bdd4fbcc5897f5e0fa2a348a042c7315e4942c644929d3c893bf38c0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT/bundle.json","state_url":"https://pith.science/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT/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":"2026-06-05T15:22:58Z","links":{"resolver":"https://pith.science/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT","bundle":"https://pith.science/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT/bundle.json","state":"https://pith.science/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S3MS5QFUIEJZP6CJNKMJZZDEOT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:S3MS5QFUIEJZP6CJNKMJZZDEOT","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":"a6f3cc442c158b62c19bf216389efb851d692f9d4c32ce6bcabf4ac024e3af06","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-27T21:34:43Z","title_canon_sha256":"0f9f8f62ce694ac3c0dd9cde894c86263eb73ac44983c16a1b254da22ed5d2c2"},"schema_version":"1.0","source":{"id":"astro-ph/0602601","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0602601","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0602601v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0602601","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"S3MS5QFUIEJZ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"S3MS5QFUIEJZP6CJ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"S3MS5QFU","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:e5ac20a0bdd4fbcc5897f5e0fa2a348a042c7315e4942c644929d3c893bf38c0","target":"graph","created_at":"2026-05-18T04:29:05Z","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":"Globular cluster (GC) systems have now been studied in galaxies ranging from dwarfs to giants and spanning the full Hubble sequence of morphological types. Imaging and spectroscopy with the Hubble Space Telescope and large ground-based telescopes have together established that most galaxies have bimodal color distributions that reflect two subpopulations of old GCs: metal-poor and metal-rich. The characteristics of both subpopulations are correlated with those of their parent galaxies. We argue that metal-poor GCs formed in low-mass dark matter halos in the early universe and that their proper","authors_text":"Jay Strader (UCO/Lick Observatory), Jean P. Brodie","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-02-27T21:34:43Z","title":"Extragalactic Globular Clusters and Galaxy Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0602601","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":"sha256:4d27ac7119ceae5420c18ee9c42c150fcba47243a308bafdf9b83e5b195b4521","target":"record","created_at":"2026-05-18T04:29:05Z","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":"a6f3cc442c158b62c19bf216389efb851d692f9d4c32ce6bcabf4ac024e3af06","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-02-27T21:34:43Z","title_canon_sha256":"0f9f8f62ce694ac3c0dd9cde894c86263eb73ac44983c16a1b254da22ed5d2c2"},"schema_version":"1.0","source":{"id":"astro-ph/0602601","kind":"arxiv","version":1}},"canonical_sha256":"96d92ec0b4411397f8496a989ce46474d609d9949b04bfe671f72beb359a17d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"96d92ec0b4411397f8496a989ce46474d609d9949b04bfe671f72beb359a17d1","first_computed_at":"2026-05-18T04:29:05.010808Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:05.010808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+nvZrKVhfA9kz3JFAPcLOLJ1/apTlmGjTZcEDQCqi9Cvpc7fKFNBkRLxvBFezmyBMdWgwpz6hb3AfnYyavYnDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:05.011218Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0602601","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d27ac7119ceae5420c18ee9c42c150fcba47243a308bafdf9b83e5b195b4521","sha256:e5ac20a0bdd4fbcc5897f5e0fa2a348a042c7315e4942c644929d3c893bf38c0"],"state_sha256":"c46ed8768ce4f42125288ac0a0cd19aac29cc75f8e005b6b91b96868254e19ee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8elhdo7iwLwzKcNT82L1VxIdoxG4hnAk0bVMI4jHweu0+0kF+/TyfwdeDnhrpTt0WAOZMStB/1Q2mrIWxHH/Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T15:22:58.150082Z","bundle_sha256":"3fa2a0b9f428c95570e55b3fe9600f399b44ca9cb9172e35994d58504bea457c"}}