{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3TSLJ2R6YCQCG7BBSOYQWSMNNN","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":"212aa0c97df02214cd8eb4ec9e30fd09a471e8edecc350770b6297b93e4af748","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-07T23:04:52Z","title_canon_sha256":"c990bd02ebc44a10cc1ca7993452d11bce327ac02a6bcaa3ddafc6142930ac7a"},"schema_version":"1.0","source":{"id":"1808.02577","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.02577","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"arxiv_version","alias_value":"1808.02577v2","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.02577","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"pith_short_12","alias_value":"3TSLJ2R6YCQC","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"3TSLJ2R6YCQCG7BB","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"3TSLJ2R6","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:e03b1397597f2f2e1d19884061fa2777b968d456a989462930ef3b64aa3e33ff","target":"graph","created_at":"2026-05-17T23:56:20Z","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":"As a young massive cluster in the Central Molecular Zone, the Arches cluster is a valuable probe of the stellar Initial Mass Function (IMF) in the extreme Galactic Center environment. We use multi-epoch Hubble Space Telescope observations to obtain high-precision proper motion and photometric measurements of the cluster, calculating cluster membership probabilities for stars down to 1.8 M$_{\\odot}$ between cluster radii of 0.25 pc -- 3.0 pc. We achieve a cluster sample with just ~8% field contamination, a significant improvement over photometrically-selected samples which are severely compromi","authors_text":"A.M. Ghez, F. Najarro, J. Anderson, J.R. Lu, M.R. Morris, M.W. Hosek Jr., S.M. Albers, W.I. Clarkson","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-07T23:04:52Z","title":"The Unusual Initial Mass Function of the Arches Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.02577","kind":"arxiv","version":2},"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:a72750b8ed01c5494fa069ed6160c19a91f2a61824a4ef0ebeba3cb92aea6847","target":"record","created_at":"2026-05-17T23:56:20Z","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":"212aa0c97df02214cd8eb4ec9e30fd09a471e8edecc350770b6297b93e4af748","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-07T23:04:52Z","title_canon_sha256":"c990bd02ebc44a10cc1ca7993452d11bce327ac02a6bcaa3ddafc6142930ac7a"},"schema_version":"1.0","source":{"id":"1808.02577","kind":"arxiv","version":2}},"canonical_sha256":"dce4b4ea3ec0a0237c2193b10b498d6b5fd993f60f5fed8e4af4af66d63cd473","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dce4b4ea3ec0a0237c2193b10b498d6b5fd993f60f5fed8e4af4af66d63cd473","first_computed_at":"2026-05-17T23:56:20.193271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:20.193271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ywoGy1cS7CqRneOMhvNfi0w+Sexaeor+fwqUXrOLZb9L55tWQeSml8cA2g12OOYXo7AVgheJzNjPU90w8S8sBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:20.193928Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.02577","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a72750b8ed01c5494fa069ed6160c19a91f2a61824a4ef0ebeba3cb92aea6847","sha256:e03b1397597f2f2e1d19884061fa2777b968d456a989462930ef3b64aa3e33ff"],"state_sha256":"4d0ab5ac3b0f60f1cc24b152048fdb794a62c359a1098f827a69bcc4509527bd"}