{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:XJM6LQSAYUJFGLGBLLMJXUUMDT","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":"4921b4c572d798c2b8b57eba8aff3149a7cb641a4ba26c2f81d773e2458f329a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-10T14:01:21Z","title_canon_sha256":"d52bcb9034a4380657388a014856e37d9adce43b2fa76cb0684feb397a1c8540"},"schema_version":"1.0","source":{"id":"astro-ph/0210235","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0210235","created_at":"2026-07-04T16:30:57Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0210235v1","created_at":"2026-07-04T16:30:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0210235","created_at":"2026-07-04T16:30:57Z"},{"alias_kind":"pith_short_12","alias_value":"XJM6LQSAYUJF","created_at":"2026-07-04T16:30:57Z"},{"alias_kind":"pith_short_16","alias_value":"XJM6LQSAYUJFGLGB","created_at":"2026-07-04T16:30:57Z"},{"alias_kind":"pith_short_8","alias_value":"XJM6LQSA","created_at":"2026-07-04T16:30:57Z"}],"graph_snapshots":[{"event_id":"sha256:ce212d668d31ddedf153f6b0caabbc7e8ae11f9ce476414a488f7d2d324568bf","target":"graph","created_at":"2026-07-04T16:30:57Z","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/astro-ph/0210235/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We derive quantitative star formation histories of the four suspected tidal dwarf galaxies in the M81 group, HolmbergIX, BK3N, Arp-loop (A0952+69), and Garland, using Hubble Space Telescope/Wide Field Planetary Camera2 images in F606W and F814W obtained as part of a Snapshot survey of dwarf galaxies in the Local Universe. We consider the spatial distribution and ages of resolved stellar populations in these dwarf irregular galaxies. We use synthetic color-magnitude diagrams to derive the ages of the major star formation episodes, star formation rates, and approximate metallicity ranges. All th","authors_text":"A. E. Dolphin, A. Sarajedini, D. Geisler, E. K. Grebel, I. D. Karachentsev, L. N. Makarova, M. E. Sharina, P. Guhathakurta, P. Seitzer, P.W. Hodge, V. E. Karachentseva","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-10-10T14:01:21Z","title":"Tidal dwarfs in the M81 group: the second generation?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0210235","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:af61f5b45a069b1655e00f40a05e02887caced634e40be5a074bdd714fa71618","target":"record","created_at":"2026-07-04T16:30:57Z","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":"4921b4c572d798c2b8b57eba8aff3149a7cb641a4ba26c2f81d773e2458f329a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-10-10T14:01:21Z","title_canon_sha256":"d52bcb9034a4380657388a014856e37d9adce43b2fa76cb0684feb397a1c8540"},"schema_version":"1.0","source":{"id":"astro-ph/0210235","kind":"arxiv","version":1}},"canonical_sha256":"ba59e5c240c512532cc15ad89bd28c1ceaadb1c48a2c75ec19b679b003306377","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba59e5c240c512532cc15ad89bd28c1ceaadb1c48a2c75ec19b679b003306377","first_computed_at":"2026-07-04T16:30:57.152939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:30:57.152939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j2JZlRkhU3kUKV5QKSjMTQAfB0QjbuxI7adwygA6i3BT8dkyz8tWImo3rF0ZU4YCbj/Txh/8Qeaj7zE6wuN6Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:30:57.153370Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0210235","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af61f5b45a069b1655e00f40a05e02887caced634e40be5a074bdd714fa71618","sha256:ce212d668d31ddedf153f6b0caabbc7e8ae11f9ce476414a488f7d2d324568bf"],"state_sha256":"ed2f0c059e5b8ffd7e8bf7d8cc7656377efb8c71b99b11ac2a63736ed2b9d0d3"}