{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:G2WUNZXRZ4GOIQUDJ5B6QJ37RW","short_pith_number":"pith:G2WUNZXR","canonical_record":{"source":{"id":"1711.06079","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-16T13:34:14Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2aaad39e341cf09b242903f627a8f26a33fff70604eca8242169af7148adb93d","abstract_canon_sha256":"cee048549684e929790c22e301deb8793af09658fd4c95328bbae86f47860cad"},"schema_version":"1.0"},"canonical_sha256":"36ad46e6f1cf0ce442834f43e8277f8d9c53d559d75a0027622771b339a4c507","source":{"kind":"arxiv","id":"1711.06079","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.06079","created_at":"2026-05-18T00:25:51Z"},{"alias_kind":"arxiv_version","alias_value":"1711.06079v1","created_at":"2026-05-18T00:25:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.06079","created_at":"2026-05-18T00:25:51Z"},{"alias_kind":"pith_short_12","alias_value":"G2WUNZXRZ4GO","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"G2WUNZXRZ4GOIQUD","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"G2WUNZXR","created_at":"2026-05-18T12:31:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:G2WUNZXRZ4GOIQUDJ5B6QJ37RW","target":"record","payload":{"canonical_record":{"source":{"id":"1711.06079","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-16T13:34:14Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2aaad39e341cf09b242903f627a8f26a33fff70604eca8242169af7148adb93d","abstract_canon_sha256":"cee048549684e929790c22e301deb8793af09658fd4c95328bbae86f47860cad"},"schema_version":"1.0"},"canonical_sha256":"36ad46e6f1cf0ce442834f43e8277f8d9c53d559d75a0027622771b339a4c507","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:25:51.504516Z","signature_b64":"NjuARyQAaY1s7yrz99MpOMN8UHeyIeacgbhh1Zu7rNMaHHJ2OFsxI35RFaQBJRMOlvvSIhyshQUNB1AiYawtAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36ad46e6f1cf0ce442834f43e8277f8d9c53d559d75a0027622771b339a4c507","last_reissued_at":"2026-05-18T00:25:51.503910Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:25:51.503910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.06079","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":"2026-05-18T00:25:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aqnc9gICvYHLaQWz+kI29BaoQp+dPe3vYgrH0ONRqjVzIXisl3NjIegj15Ub+IYEjHg4fKL0cG6TE5y9lIx4Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:17:16.537475Z"},"content_sha256":"561def4b8b6a7393e1cdbaa3ef582c98456ed9594deee485ca65b596def390f0","schema_version":"1.0","event_id":"sha256:561def4b8b6a7393e1cdbaa3ef582c98456ed9594deee485ca65b596def390f0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:G2WUNZXRZ4GOIQUDJ5B6QJ37RW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Not-so-simple stellar populations in nearby, resolved massive star clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Chengyuan Li, Richard de Grijs","submitted_at":"2017-11-16T13:34:14Z","abstract_excerpt":"Around the turn of the last century, star clusters of all kinds were considered \"simple\" stellar populations. Over the past decade, this situation has changed dramatically. At the same time, star clusters are among the brightest stellar population components and, as such, they are visible out to much greater distances than individual stars, even the brightest, so that understanding the intricacies of star cluster composition and their evolution is imperative for understanding stellar populations and the evolution of galaxies as a whole. In this review of where the field has moved to in recent "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.06079","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":"2026-05-18T00:25:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xC6hyTWEdDARtO4TmOMMuRahRYOOSxnKOH5BGBCHoit0oWHwH3ioYyNb7gLdqy8NkPcvH6u7pIWG9zw/pqeQAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:17:16.537826Z"},"content_sha256":"52d5cb43941995d42619ef172d237d5c48b224f4eb25094e20c64af582bd6e92","schema_version":"1.0","event_id":"sha256:52d5cb43941995d42619ef172d237d5c48b224f4eb25094e20c64af582bd6e92"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW/bundle.json","state_url":"https://pith.science/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW/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":"2026-06-03T21:17:16Z","links":{"resolver":"https://pith.science/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW","bundle":"https://pith.science/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW/bundle.json","state":"https://pith.science/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G2WUNZXRZ4GOIQUDJ5B6QJ37RW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:G2WUNZXRZ4GOIQUDJ5B6QJ37RW","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":"cee048549684e929790c22e301deb8793af09658fd4c95328bbae86f47860cad","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-16T13:34:14Z","title_canon_sha256":"2aaad39e341cf09b242903f627a8f26a33fff70604eca8242169af7148adb93d"},"schema_version":"1.0","source":{"id":"1711.06079","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.06079","created_at":"2026-05-18T00:25:51Z"},{"alias_kind":"arxiv_version","alias_value":"1711.06079v1","created_at":"2026-05-18T00:25:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.06079","created_at":"2026-05-18T00:25:51Z"},{"alias_kind":"pith_short_12","alias_value":"G2WUNZXRZ4GO","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"G2WUNZXRZ4GOIQUD","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"G2WUNZXR","created_at":"2026-05-18T12:31:15Z"}],"graph_snapshots":[{"event_id":"sha256:52d5cb43941995d42619ef172d237d5c48b224f4eb25094e20c64af582bd6e92","target":"graph","created_at":"2026-05-18T00:25:51Z","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":"Around the turn of the last century, star clusters of all kinds were considered \"simple\" stellar populations. Over the past decade, this situation has changed dramatically. At the same time, star clusters are among the brightest stellar population components and, as such, they are visible out to much greater distances than individual stars, even the brightest, so that understanding the intricacies of star cluster composition and their evolution is imperative for understanding stellar populations and the evolution of galaxies as a whole. In this review of where the field has moved to in recent ","authors_text":"Chengyuan Li, Richard de Grijs","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-16T13:34:14Z","title":"Not-so-simple stellar populations in nearby, resolved massive star clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.06079","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":"sha256:561def4b8b6a7393e1cdbaa3ef582c98456ed9594deee485ca65b596def390f0","target":"record","created_at":"2026-05-18T00:25:51Z","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":"cee048549684e929790c22e301deb8793af09658fd4c95328bbae86f47860cad","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-11-16T13:34:14Z","title_canon_sha256":"2aaad39e341cf09b242903f627a8f26a33fff70604eca8242169af7148adb93d"},"schema_version":"1.0","source":{"id":"1711.06079","kind":"arxiv","version":1}},"canonical_sha256":"36ad46e6f1cf0ce442834f43e8277f8d9c53d559d75a0027622771b339a4c507","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36ad46e6f1cf0ce442834f43e8277f8d9c53d559d75a0027622771b339a4c507","first_computed_at":"2026-05-18T00:25:51.503910Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:25:51.503910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NjuARyQAaY1s7yrz99MpOMN8UHeyIeacgbhh1Zu7rNMaHHJ2OFsxI35RFaQBJRMOlvvSIhyshQUNB1AiYawtAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:25:51.504516Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.06079","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:561def4b8b6a7393e1cdbaa3ef582c98456ed9594deee485ca65b596def390f0","sha256:52d5cb43941995d42619ef172d237d5c48b224f4eb25094e20c64af582bd6e92"],"state_sha256":"ab341386997ecce896c9c51fe2f96561e3ac253f6a3df752cab7e2a88beffef2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MKxpEtNjm5Y0XJcGRIK/tYlW/MLbr6QO4dT6GJ5mKGSwZcuwgIzgKsOHYhtRcHyDO7JXVPv09VrNlRAe5vzOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T21:17:16.539758Z","bundle_sha256":"7f6b7682c47b88a6ed5a7362da0001b7a8edfa13dd22ff3536cd8a31367c3ef5"}}