{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:JB73TPAMB47MWU6BZCEKOKMHSO","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":"a7a23a604ed7c3fe03e53d092ca1c3af187ae5623b3d13eaadd76c9f2716fa0e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-11T06:35:37Z","title_canon_sha256":"d3870e84e88a4a5d0063e861b651efd53f125e7a239667fb3069c8400232985b"},"schema_version":"1.0","source":{"id":"1111.2670","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.2670","created_at":"2026-05-18T01:59:40Z"},{"alias_kind":"arxiv_version","alias_value":"1111.2670v1","created_at":"2026-05-18T01:59:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.2670","created_at":"2026-05-18T01:59:40Z"},{"alias_kind":"pith_short_12","alias_value":"JB73TPAMB47M","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JB73TPAMB47MWU6B","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JB73TPAM","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:fe08bbb043a05434cde116b4d3df26f4e7e303a108173be426825bfc56b59e67","target":"graph","created_at":"2026-05-18T01:59:40Z","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":"We present the first photometric results in J, H, and K_s from 2MASS imaging of 10 classical globular clusters in the far outer regions of M31. Combined with the V and I photometric data from previous literature, we constructed the color-color diagram between J-K_s and V-I. By comparing the integrated photometric measurements with evolutionary models, we estimate the ages of these clusters. The results showed that, all of these clusters are older than $3\\times 10^9$ yrs, of which 4 are older than 10 Gyrs and the other 6 are in intermediate ages between 3-8 Gyrs. The masses for these outer halo","authors_text":"2) ((1) National Astronomical Observatories, (2) Key Laboratory of Optical Astronomy, Beijing, China), Chinese Academy of Sciences, Jun Ma (1, National Astronomical Observatories","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-11T06:35:37Z","title":"2MASS photometry and age estimate of globular clusters in the outer halo of M31"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.2670","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:a96d89bd0fa24567c72397e4786a39f5f1957a840134354d8ac721263a0f7c84","target":"record","created_at":"2026-05-18T01:59:40Z","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":"a7a23a604ed7c3fe03e53d092ca1c3af187ae5623b3d13eaadd76c9f2716fa0e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-11T06:35:37Z","title_canon_sha256":"d3870e84e88a4a5d0063e861b651efd53f125e7a239667fb3069c8400232985b"},"schema_version":"1.0","source":{"id":"1111.2670","kind":"arxiv","version":1}},"canonical_sha256":"487fb9bc0c0f3ecb53c1c888a729879383ee38eb52be34b837798c561fd128e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"487fb9bc0c0f3ecb53c1c888a729879383ee38eb52be34b837798c561fd128e9","first_computed_at":"2026-05-18T01:59:40.360964Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:40.360964Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"os0vTRGXy17e+J1ZjGTs4Hw7120vNvaRr0HqZGQ/E0hdi2Dl0XTABTfWBjcsFG3SsKtmiK5hSI92wTx5DLcbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:40.361665Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.2670","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a96d89bd0fa24567c72397e4786a39f5f1957a840134354d8ac721263a0f7c84","sha256:fe08bbb043a05434cde116b4d3df26f4e7e303a108173be426825bfc56b59e67"],"state_sha256":"6c10096fa13d275daa6d6975a9ef98bb0a64a470da8f075a2488c1d74ffb70ef"}