{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:3YZ7KPYVKGX6WVP3ICXJWLCRYP","short_pith_number":"pith:3YZ7KPYV","canonical_record":{"source":{"id":"1911.02835","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-07T10:37:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"48ae6475134d3ccc66394418c6b4edcee80240c2849785135c8d9c037e8f8811","abstract_canon_sha256":"c3115935d6a6a133b6b27bf8720e0492c2afff5f1c6ae57d881dff0410aa4b0b"},"schema_version":"1.0"},"canonical_sha256":"de33f53f1551afeb55fb40ae9b2c51c3d2edb6d850ec8edfc359f9e7d77d8aad","source":{"kind":"arxiv","id":"1911.02835","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.02835","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"arxiv_version","alias_value":"1911.02835v1","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.02835","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"pith_short_12","alias_value":"3YZ7KPYVKGX6","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"pith_short_16","alias_value":"3YZ7KPYVKGX6WVP3","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"pith_short_8","alias_value":"3YZ7KPYV","created_at":"2026-07-05T00:17:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:3YZ7KPYVKGX6WVP3ICXJWLCRYP","target":"record","payload":{"canonical_record":{"source":{"id":"1911.02835","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-07T10:37:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"48ae6475134d3ccc66394418c6b4edcee80240c2849785135c8d9c037e8f8811","abstract_canon_sha256":"c3115935d6a6a133b6b27bf8720e0492c2afff5f1c6ae57d881dff0410aa4b0b"},"schema_version":"1.0"},"canonical_sha256":"de33f53f1551afeb55fb40ae9b2c51c3d2edb6d850ec8edfc359f9e7d77d8aad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:17:57.403025Z","signature_b64":"Nef4bpTwZ0vrZEBUGJBULp8luL/5Wr1pCwbxgLCcXraewiOuNxDppic/uZz2YTNb41WdCv0ByD/houKuSis/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"de33f53f1551afeb55fb40ae9b2c51c3d2edb6d850ec8edfc359f9e7d77d8aad","last_reissued_at":"2026-07-05T00:17:57.402633Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:17:57.402633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.02835","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":"2026-07-05T00:17:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bcGWqI80xf1PWSR+XrHAAKCAJZI3Uv8pHqKXipxKDvY0Zo5GGAhfA0LBZZ7UcxfnNqqi0Uu5k6TP/tNhT04ODg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:16:19.253526Z"},"content_sha256":"37f164eb02805646e799fa2114112b572cf90b73b0cd9f60a136f154abdb8caf","schema_version":"1.0","event_id":"sha256:37f164eb02805646e799fa2114112b572cf90b73b0cd9f60a136f154abdb8caf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:3YZ7KPYVKGX6WVP3ICXJWLCRYP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"What is a globular cluster? An observational perspective","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Angela Bragaglia, Antonio Sollima, Eugenio Carretta, Raffaele Gratton, Sara Lucatello, Valentina D'Orazi","submitted_at":"2019-11-07T10:37:00Z","abstract_excerpt":"Globular clusters are large and dense agglomerate of stars. At variance with smaller clusters of stars, they exhibit signs of some chemical evolution. At least for this reason, they are intermediate between open clusters and massive objects such as nuclear clusters or compact galaxies. While some facts are well established, the increasing amount of observational data are revealing a complexity that has so far defied the attempts to interpret the whole data set in a simple scenario. We review this topic focusing on the main observational features of clusters in the Milky Way and its satellites."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.02835","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/1911.02835/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":"2026-07-05T00:17:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FBQxC/vU5awFu49MTSvTO+NPo7xKiMH+cnRoQAp3Pio6Tinu0il86uC4ulEeskyKtG0lquoI95bQ/CBHiJI/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:16:19.254031Z"},"content_sha256":"fe180f9970de9a24d78c90698035b218edd2c03d039c30008617ec5346bfad9b","schema_version":"1.0","event_id":"sha256:fe180f9970de9a24d78c90698035b218edd2c03d039c30008617ec5346bfad9b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP/bundle.json","state_url":"https://pith.science/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP/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":"2026-08-04T09:16:19Z","links":{"resolver":"https://pith.science/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP","bundle":"https://pith.science/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP/bundle.json","state":"https://pith.science/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3YZ7KPYVKGX6WVP3ICXJWLCRYP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:3YZ7KPYVKGX6WVP3ICXJWLCRYP","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":"c3115935d6a6a133b6b27bf8720e0492c2afff5f1c6ae57d881dff0410aa4b0b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-07T10:37:00Z","title_canon_sha256":"48ae6475134d3ccc66394418c6b4edcee80240c2849785135c8d9c037e8f8811"},"schema_version":"1.0","source":{"id":"1911.02835","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.02835","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"arxiv_version","alias_value":"1911.02835v1","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.02835","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"pith_short_12","alias_value":"3YZ7KPYVKGX6","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"pith_short_16","alias_value":"3YZ7KPYVKGX6WVP3","created_at":"2026-07-05T00:17:57Z"},{"alias_kind":"pith_short_8","alias_value":"3YZ7KPYV","created_at":"2026-07-05T00:17:57Z"}],"graph_snapshots":[{"event_id":"sha256:fe180f9970de9a24d78c90698035b218edd2c03d039c30008617ec5346bfad9b","target":"graph","created_at":"2026-07-05T00:17:57Z","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/1911.02835/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Globular clusters are large and dense agglomerate of stars. At variance with smaller clusters of stars, they exhibit signs of some chemical evolution. At least for this reason, they are intermediate between open clusters and massive objects such as nuclear clusters or compact galaxies. While some facts are well established, the increasing amount of observational data are revealing a complexity that has so far defied the attempts to interpret the whole data set in a simple scenario. We review this topic focusing on the main observational features of clusters in the Milky Way and its satellites.","authors_text":"Angela Bragaglia, Antonio Sollima, Eugenio Carretta, Raffaele Gratton, Sara Lucatello, Valentina D'Orazi","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-07T10:37:00Z","title":"What is a globular cluster? An observational perspective"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.02835","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":"sha256:37f164eb02805646e799fa2114112b572cf90b73b0cd9f60a136f154abdb8caf","target":"record","created_at":"2026-07-05T00:17:57Z","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":"c3115935d6a6a133b6b27bf8720e0492c2afff5f1c6ae57d881dff0410aa4b0b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-07T10:37:00Z","title_canon_sha256":"48ae6475134d3ccc66394418c6b4edcee80240c2849785135c8d9c037e8f8811"},"schema_version":"1.0","source":{"id":"1911.02835","kind":"arxiv","version":1}},"canonical_sha256":"de33f53f1551afeb55fb40ae9b2c51c3d2edb6d850ec8edfc359f9e7d77d8aad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de33f53f1551afeb55fb40ae9b2c51c3d2edb6d850ec8edfc359f9e7d77d8aad","first_computed_at":"2026-07-05T00:17:57.402633Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:17:57.402633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nef4bpTwZ0vrZEBUGJBULp8luL/5Wr1pCwbxgLCcXraewiOuNxDppic/uZz2YTNb41WdCv0ByD/houKuSis/DA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:17:57.403025Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.02835","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37f164eb02805646e799fa2114112b572cf90b73b0cd9f60a136f154abdb8caf","sha256:fe180f9970de9a24d78c90698035b218edd2c03d039c30008617ec5346bfad9b"],"state_sha256":"43bd65921b9d7ff64e1b845e11aba493d0a956e807dba44fe4a19099a14716cb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iQr+OMgnwrPrLOkJG8zlHr7+8tawxE/fZFcCAaBO0dX0XOtwrh9eekJLGm/vm/nm7ZDt2GYai/VOHlH+JPrVAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T09:16:19.257420Z","bundle_sha256":"6576283a43c065f0b00ff04336ef3e9d9555f76f459c771e88bcf6dcc4060fc9"}}