{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:TSQIIEZ7LWZG2OW4PACU2SUIUN","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":"6fad4f16e1812b6f7fb0b70881b9e6f6af98272dd8d3efe9ff27e4bf6bb6f7f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-12-23T06:24:24Z","title_canon_sha256":"20628fa8a88bb8783b26bfb777c68c1a8ada0c1d7435263e18a5e3e9093e9264"},"schema_version":"1.0","source":{"id":"0912.4572","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4572","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4572v2","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4572","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"pith_short_12","alias_value":"TSQIIEZ7LWZG","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"TSQIIEZ7LWZG2OW4","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"TSQIIEZ7","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:4944e3e344f740d3fc9abe4cf3a73bf3c36079cb0a34214b03ae6366e832f672","target":"graph","created_at":"2026-05-18T02:10:14Z","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":"The asteroid (21) Lutetia is the target of a planned close encounter by the Rosetta spacecraft in July 2010. To prepare for that flyby, Lutetia has been extensively observed by a variety of astronomical facilities. We used the Hubble Space Telescope (HST) to determine the albedo of Lutetia over a wide wavelength range, extending from ~150 nm to ~700 nm. Using data from a variety of HST filters and a ground-based visible light spectrum, we employed synthetic photometry techniques to derive absolute fluxes for Lutetia. New results from ground-based measurements of Lutetia's size and shape were u","authors_text":"A.J. Steffl, C. R. Chapman, D.C. Slater, H.A. Weaver, J.D. Drummond, J.-L. Bertaux, J.W. Parker, L.M. Feaga, M.F. A'Hearn, M.J. Mutchler, P.D. Feldman, S.A. Stern, W.J. Merline","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-12-23T06:24:24Z","title":"Ultraviolet and visible photometry of asteroid (21) Lutetia using the Hubble Space Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4572","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":"sha256:79fc267e1c0c6e7b9b6ca9c7e25d637eb99c1a163144ffaf5dc7f51cbe7f36a1","target":"record","created_at":"2026-05-18T02:10:14Z","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":"6fad4f16e1812b6f7fb0b70881b9e6f6af98272dd8d3efe9ff27e4bf6bb6f7f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-12-23T06:24:24Z","title_canon_sha256":"20628fa8a88bb8783b26bfb777c68c1a8ada0c1d7435263e18a5e3e9093e9264"},"schema_version":"1.0","source":{"id":"0912.4572","kind":"arxiv","version":2}},"canonical_sha256":"9ca084133f5db26d3adc78054d4a88a351887ca43a03bd2e0add6df4bc6c3dbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ca084133f5db26d3adc78054d4a88a351887ca43a03bd2e0add6df4bc6c3dbe","first_computed_at":"2026-05-18T02:10:14.344939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:14.344939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6IL7aqK42AR1V+ZOyqgFc3L+YO85pORcm3RO/Uq54rr6M0KuPCBtCZgQUkTuSmsfyq5I1e9WeKlfwpXxXajgCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:14.345615Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.4572","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79fc267e1c0c6e7b9b6ca9c7e25d637eb99c1a163144ffaf5dc7f51cbe7f36a1","sha256:4944e3e344f740d3fc9abe4cf3a73bf3c36079cb0a34214b03ae6366e832f672"],"state_sha256":"267472fc0493a30e373dff9de2b0753f072169caf03c37ff1132ce9aef332d53"}