{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:PAWIPFH6GITZNJE3EIVIEMO4CQ","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":"612244956df4348c6a01abf1f98f9cc353330d2b5f452dc6b407bfa9b900b88c","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-09-06T13:12:52Z","title_canon_sha256":"980ef1f9356c5fc78d2af7fba7ca09bda210419f11944fb6fdc485837c073e9c"},"schema_version":"1.0","source":{"id":"2409.04259","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2409.04259","created_at":"2026-07-05T09:04:03Z"},{"alias_kind":"arxiv_version","alias_value":"2409.04259v1","created_at":"2026-07-05T09:04:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.04259","created_at":"2026-07-05T09:04:03Z"},{"alias_kind":"pith_short_12","alias_value":"PAWIPFH6GITZ","created_at":"2026-07-05T09:04:03Z"},{"alias_kind":"pith_short_16","alias_value":"PAWIPFH6GITZNJE3","created_at":"2026-07-05T09:04:03Z"},{"alias_kind":"pith_short_8","alias_value":"PAWIPFH6","created_at":"2026-07-05T09:04:03Z"}],"graph_snapshots":[{"event_id":"sha256:a4e94bb7a2572d34f787c6ef8bf5c9d818ca0558b882a2c41f160ae817a3921f","target":"graph","created_at":"2026-07-05T09:04:03Z","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/2409.04259/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this letter we investigate the origin of the Oosterhoff dichotomy, considering recent discoveries related to several ancient merging events of external galaxies with the Milky Way (MW). In particular, we aim to clarify if the subdivision in Oosterhoff type of Galactic Globular Clusters (GGCs) and field RR Lyrae (RRLs) could be traced back to one or more ancient galaxies that merged with the MW in its past. To this purpose, we first explored the association of GGCs with the past merging events according to different literature studies. Subsequently we compiled positions, proper motions and r","authors_text":"E. Luongo, G. Clementini, G. Longo, M. Marconi, M. Rejkuba, V. Ripepi, Z. Prudil","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-09-06T13:12:52Z","title":"An \"alien\" called Oosterhoff dichotomy?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.04259","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:ca640eefc41783d0ecc1154fbccb80328981f34626f8d3e6c6a7699662fa22c1","target":"record","created_at":"2026-07-05T09:04:03Z","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":"612244956df4348c6a01abf1f98f9cc353330d2b5f452dc6b407bfa9b900b88c","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-09-06T13:12:52Z","title_canon_sha256":"980ef1f9356c5fc78d2af7fba7ca09bda210419f11944fb6fdc485837c073e9c"},"schema_version":"1.0","source":{"id":"2409.04259","kind":"arxiv","version":1}},"canonical_sha256":"782c8794fe322796a49b222a8231dc14383a60c5ac5e65949f095a8d44675e51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"782c8794fe322796a49b222a8231dc14383a60c5ac5e65949f095a8d44675e51","first_computed_at":"2026-07-05T09:04:03.814285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:04:03.814285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wUQi00+ffj4CS/FCnm7V59tJ2aDoVwz4RoL1wQXAS/O6C+qYSC3QHzfOfS+3Ri1EcOkLZXfIN/zolh7M6lz4Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T09:04:03.814750Z","signed_message":"canonical_sha256_bytes"},"source_id":"2409.04259","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca640eefc41783d0ecc1154fbccb80328981f34626f8d3e6c6a7699662fa22c1","sha256:a4e94bb7a2572d34f787c6ef8bf5c9d818ca0558b882a2c41f160ae817a3921f"],"state_sha256":"8fac55a72c5501c11b9158ec5e0ad1d4c416b96f42caf4d2dafc880ec5b37143"}