{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:DK3VKIOFLLAFXAVIJ36TMTHCF4","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":"c7ecb20cf19690706a5008bba4a42f489454525fe954cb4b5222abe7b8895037","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-18T21:07:07Z","title_canon_sha256":"1e9150b1e71727caddc9655b3b1ad69d252ffcd78c276d6a6d4f7976f709aa67"},"schema_version":"1.0","source":{"id":"1005.3329","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.3329","created_at":"2026-05-18T02:07:17Z"},{"alias_kind":"arxiv_version","alias_value":"1005.3329v1","created_at":"2026-05-18T02:07:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.3329","created_at":"2026-05-18T02:07:17Z"},{"alias_kind":"pith_short_12","alias_value":"DK3VKIOFLLAF","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DK3VKIOFLLAFXAVI","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DK3VKIOF","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:b2843584fede0f8ecfdf8f46e72adca79d169d453f3e028be36896d57835314f","target":"graph","created_at":"2026-05-18T02:07:17Z","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 a new, BVIc photometric survey of the young open cluster IC4665, which improves on previous studies of this young cluster by incorporating a rigorous standardization procedure, thus providing high-fidelity colors and magnitudes for cluster members. We use this new photometric dataset to reevaluate the properties (age and distance) of IC4665. Namely, using a statistical approach incorporating Tau^2 CMD modeling, we measure a pre-main-sequence isochrone age and distance of 36+-9 Myr and 360+-12 pc, as well as a upper-main-sequence turn-off age and distance of 42+-12 Myr and 357+-12 pc","authors_text":"David J. James, Phillip A. Cargile","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-18T21:07:07Z","title":"Employing a New BVIc Photometric Survey of IC 4665 to Investigate the Age of this Young Open Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.3329","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":"sha256:91eb3616f4735e12e35873dae681bc015852a77a604575186fefa2ceb923b069","target":"record","created_at":"2026-05-18T02:07:17Z","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":"c7ecb20cf19690706a5008bba4a42f489454525fe954cb4b5222abe7b8895037","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-18T21:07:07Z","title_canon_sha256":"1e9150b1e71727caddc9655b3b1ad69d252ffcd78c276d6a6d4f7976f709aa67"},"schema_version":"1.0","source":{"id":"1005.3329","kind":"arxiv","version":1}},"canonical_sha256":"1ab75521c55ac05b82a84efd364ce22f00de68bf693ed1bbb6e2d3bacf59207f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ab75521c55ac05b82a84efd364ce22f00de68bf693ed1bbb6e2d3bacf59207f","first_computed_at":"2026-05-18T02:07:17.204358Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:17.204358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GkuMCwcqC+wDIIDxKyxxb4zMxs/FKs9EGQA2ZEv0dT7NApUzpt3O47FlaU/gxZg7q/40ACF2YA0dp97gIlfZBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:17.204985Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.3329","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:91eb3616f4735e12e35873dae681bc015852a77a604575186fefa2ceb923b069","sha256:b2843584fede0f8ecfdf8f46e72adca79d169d453f3e028be36896d57835314f"],"state_sha256":"7170b529e73ecea5f664fc895a283d92c2748a12850a32c989f6817be12fe337"}