{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:4OHO2V5PTFF4SJH5ZAEYMBOAKC","short_pith_number":"pith:4OHO2V5P","schema_version":"1.0","canonical_sha256":"e38eed57af994bc924fdc8098605c050a65152be0864d5c77466ea3b091d4b01","source":{"kind":"arxiv","id":"2102.04486","version":2},"attestation_state":"computed","paper":{"title":"The Age of the Universe with Globular Clusters: Reducing Systematic Uncertainties","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Benjamin D. Wandelt, David Valcin, Jose Luis Bernal, Licia Verde, Raul Jimenez","submitted_at":"2021-02-08T19:13:06Z","abstract_excerpt":"The dominant systematic uncertainty in the age determination of galactic globular clusters is the depth of the convection envelope of the stars. This parameter is partially degenerate with metallicity which is in turn degenerate with age. However, if the metal content, distance and extinction are known, the position and morphology of the red giant branch in a color-magnitude diagram are mostly sensitive to the value of the depth of the convective envelope. Therefore, using external, precise metallicity determinations this degeneracy and thus the systematic error in age, can be reduced. Alterna"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2102.04486","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-02-08T19:13:06Z","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"title_canon_sha256":"6aea0d62b3596439173df4a23131033a0d8501e1f462d561c89e3d6437ed3b90","abstract_canon_sha256":"ad99df33bbccb0239885f2c74e017ad68440d3f9cca878ac810a01894c25c831"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:50:13.787435Z","signature_b64":"BCj7Hyzr3yTz5Cdj08Ujh2m2suaQI3FB8ZKYzJHX4Su/WER9DhsnQ0Kex2lEtdVRYEcC8x1TEZehScy0vTtuAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e38eed57af994bc924fdc8098605c050a65152be0864d5c77466ea3b091d4b01","last_reissued_at":"2026-07-05T03:50:13.786989Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:50:13.786989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Age of the Universe with Globular Clusters: Reducing Systematic Uncertainties","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Benjamin D. Wandelt, David Valcin, Jose Luis Bernal, Licia Verde, Raul Jimenez","submitted_at":"2021-02-08T19:13:06Z","abstract_excerpt":"The dominant systematic uncertainty in the age determination of galactic globular clusters is the depth of the convection envelope of the stars. This parameter is partially degenerate with metallicity which is in turn degenerate with age. However, if the metal content, distance and extinction are known, the position and morphology of the red giant branch in a color-magnitude diagram are mostly sensitive to the value of the depth of the convective envelope. Therefore, using external, precise metallicity determinations this degeneracy and thus the systematic error in age, can be reduced. Alterna"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.04486","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.04486/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2102.04486","created_at":"2026-07-05T03:50:13.787045+00:00"},{"alias_kind":"arxiv_version","alias_value":"2102.04486v2","created_at":"2026-07-05T03:50:13.787045+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.04486","created_at":"2026-07-05T03:50:13.787045+00:00"},{"alias_kind":"pith_short_12","alias_value":"4OHO2V5PTFF4","created_at":"2026-07-05T03:50:13.787045+00:00"},{"alias_kind":"pith_short_16","alias_value":"4OHO2V5PTFF4SJH5","created_at":"2026-07-05T03:50:13.787045+00:00"},{"alias_kind":"pith_short_8","alias_value":"4OHO2V5P","created_at":"2026-07-05T03:50:13.787045+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC","json":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC.json","graph_json":"https://pith.science/api/pith-number/4OHO2V5PTFF4SJH5ZAEYMBOAKC/graph.json","events_json":"https://pith.science/api/pith-number/4OHO2V5PTFF4SJH5ZAEYMBOAKC/events.json","paper":"https://pith.science/paper/4OHO2V5P"},"agent_actions":{"view_html":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC","download_json":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC.json","view_paper":"https://pith.science/paper/4OHO2V5P","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2102.04486&json=true","fetch_graph":"https://pith.science/api/pith-number/4OHO2V5PTFF4SJH5ZAEYMBOAKC/graph.json","fetch_events":"https://pith.science/api/pith-number/4OHO2V5PTFF4SJH5ZAEYMBOAKC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC/action/storage_attestation","attest_author":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC/action/author_attestation","sign_citation":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC/action/citation_signature","submit_replication":"https://pith.science/pith/4OHO2V5PTFF4SJH5ZAEYMBOAKC/action/replication_record"}},"created_at":"2026-07-05T03:50:13.787045+00:00","updated_at":"2026-07-05T03:50:13.787045+00:00"}