{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:M56DBOXLS3AH5CBWJVZCYJZUK4","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":"6a5de5eb18d912ae55d6963193682ecba99bd0dc71ed94ce9fb9f69bee350182","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-25T08:29:15Z","title_canon_sha256":"3493332689f33a2ab5defc5ac5e24eece3ab2a7d55804be2574a7ef0c51d17f1"},"schema_version":"1.0","source":{"id":"1503.07303","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07303","created_at":"2026-05-18T02:20:21Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07303v1","created_at":"2026-05-18T02:20:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07303","created_at":"2026-05-18T02:20:21Z"},{"alias_kind":"pith_short_12","alias_value":"M56DBOXLS3AH","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"M56DBOXLS3AH5CBW","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"M56DBOXL","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:9eb4f6dd19de37c4affb85766be4260ade9e916aaec30dba180598a77b6c32f3","target":"graph","created_at":"2026-05-18T02:20:21Z","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":"GRAVITY is the second generation Very Large Telescope Interferometer instrument for precision narrow-angle astrometry and interferometric imaging in the Near Infra-Red (NIR). It shall provide precision astrometry of order 10 microarcseconds, and imaging capability at a few milliarcsecond resolution, and hence will revolutionise dynamical measurements of celestial objects. GRAVITY is currently in the last stages of its integration and tests in Garching at MPE, and will be delivered to the VLT Interferometer (VLTI) in 2015. We present here the instrument, with a particular focus on the component","authors_text":"A. Amorim, A. Janssen, C. Straubmeier, E. Sturm, E. Wieprecht, F. Eisenhauer, F. Haussmann, G. Perrin, J. Weber, K. Perraut, L. Burtscher, L. Jocou, M. Haug, M. Lippa, N. Blind, O. Hans, O. Pfuhl, P. Fedou, R. Dembet, S. Gillessen, S. Huber, S. Kellner, S. Lacour, T. Ott, W. Brandner, Y. Kok","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-25T08:29:15Z","title":"GRAVITY: the VLTI 4-beam combiner for narrow-angle astrometry and interferometric imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07303","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":"sha256:342b5e95d41e3354ee157b1a6586e3f65465a0f16b0a2563f3e833e75e7e6985","target":"record","created_at":"2026-05-18T02:20:21Z","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":"6a5de5eb18d912ae55d6963193682ecba99bd0dc71ed94ce9fb9f69bee350182","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-25T08:29:15Z","title_canon_sha256":"3493332689f33a2ab5defc5ac5e24eece3ab2a7d55804be2574a7ef0c51d17f1"},"schema_version":"1.0","source":{"id":"1503.07303","kind":"arxiv","version":1}},"canonical_sha256":"677c30baeb96c07e88364d722c273457007cbfb477ec810142d45c22f4b71c7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"677c30baeb96c07e88364d722c273457007cbfb477ec810142d45c22f4b71c7a","first_computed_at":"2026-05-18T02:20:21.473329Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:21.473329Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lu7sG9xtKlkkiposvhIDTY7cFRZNBpd7Pj84l/CQyCC0EN+KTzubL/9CqdNMeRAwmbKdfNGHPpN4l6KhLGf8CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:21.473894Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.07303","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:342b5e95d41e3354ee157b1a6586e3f65465a0f16b0a2563f3e833e75e7e6985","sha256:9eb4f6dd19de37c4affb85766be4260ade9e916aaec30dba180598a77b6c32f3"],"state_sha256":"655e6b8a3b40efa7bab352cd4e1b3f890c3c8d0c0788289a1daaacf0d8a4ae1d"}