{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:NEXJ6GAAPLR3TLIDHN2IFX2XWH","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":"415ef5e1fc50b973bae4cd948f9e2ea2e3e29e485b5e3262d90c26ecf5538604","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-14T16:56:21Z","title_canon_sha256":"32f8b6a2d3160a4c44c1fa8a32a61fee0149d26a1e9d2f7578c31f08ce442247"},"schema_version":"1.0","source":{"id":"0909.2592","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2592","created_at":"2026-05-18T02:11:48Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2592v1","created_at":"2026-05-18T02:11:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2592","created_at":"2026-05-18T02:11:48Z"},{"alias_kind":"pith_short_12","alias_value":"NEXJ6GAAPLR3","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"NEXJ6GAAPLR3TLID","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"NEXJ6GAA","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:77362272c40d4b235eead552cbb56c64ab3013ab92eda70b49839c3c45f17a20","target":"graph","created_at":"2026-05-18T02:11:48Z","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 systematically investigate the error sources for high-precision astrometry from adaptive optics based near-infrared imaging data. We focus on the application in the crowded stellar field in the Galactic Center. We show that at the level of <=100 micro-arcseconds a number of effects are limiting the accuracy. Most important are the imperfectly subtracted seeing halos of neighboring stars, residual image distortions and unrecognized confusion of the target source with fainter sources in the background. Further contributors to the error budget are the uncertainty in estimating the point spread","authors_text":"Frank Eisenhauer, Hendrik Bartko, Katie Dodds-Eden, Oliver Pfuhl, Reinhard Genzel, Richard Davies, Sascha Trippe, Stefan Gillessen, Thomas Ott, Tobias K. Fritz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-14T16:56:21Z","title":"What is limiting near-infrared astrometry in the Galactic Center?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2592","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":"sha256:664b70816b0faa8834079a63f2fc97119c927e2009f38da47f574a24eeaa55a9","target":"record","created_at":"2026-05-18T02:11:48Z","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":"415ef5e1fc50b973bae4cd948f9e2ea2e3e29e485b5e3262d90c26ecf5538604","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-14T16:56:21Z","title_canon_sha256":"32f8b6a2d3160a4c44c1fa8a32a61fee0149d26a1e9d2f7578c31f08ce442247"},"schema_version":"1.0","source":{"id":"0909.2592","kind":"arxiv","version":1}},"canonical_sha256":"692e9f18007ae3b9ad033b7482df57b1d0425f4960fd2f33b5e230806d9dc5ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"692e9f18007ae3b9ad033b7482df57b1d0425f4960fd2f33b5e230806d9dc5ab","first_computed_at":"2026-05-18T02:11:48.071568Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:48.071568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"M2cshiS/PfzYngZ8G9RZlDBq7MBXRasxWTKBNg6ErMITVUZbyZmXmkkasZ3RBcJRFN+drbHIVUK6zUXZpfchCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:48.072213Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.2592","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:664b70816b0faa8834079a63f2fc97119c927e2009f38da47f574a24eeaa55a9","sha256:77362272c40d4b235eead552cbb56c64ab3013ab92eda70b49839c3c45f17a20"],"state_sha256":"ee7492ddf058c443aae1be8bbdbf29291c1de6978f5caf567f02ebe422cc5599"}