{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:7HQFHKIB5HUABNF3PJTLV3IPHJ","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":"3556c4090e1dbb63294d7fac4d879b5a0bd3d21d6fc3de07edb70e5ccaa56531","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-09T00:55:36Z","title_canon_sha256":"af0d067535899747d97748b62c752f30972e9c26817c2522dd3dcb52da68fa62"},"schema_version":"1.0","source":{"id":"1510.02536","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.02536","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"1510.02536v2","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.02536","created_at":"2026-05-18T01:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"7HQFHKIB5HUA","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7HQFHKIB5HUABNF3","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7HQFHKIB","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:13b0b3c33419a94e697bcbc38e0e35c9195ad3c64b1f488f7937ffe6006770d0","target":"graph","created_at":"2026-05-18T01:19:40Z","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 present an analysis of 23 absorption systems along the lines of sight towards 18 quasars in the redshift range of $0.4 \\leq z_{abs} \\leq 2.3$ observed on the Very Large Telescope (VLT) using the Ultraviolet and Visual Echelle Spectrograph (UVES). Considering both statistical and systematic error contributions we find a robust estimate of the weighted mean deviation of the fine-structure constant from its current, laboratory value of $\\Delta\\alpha/\\alpha=\\left(0.22\\pm0.23\\right)\\times10^{-5}$, consistent with the dipole variation reported in Webb et al. and King et al. This paper also examin","authors_text":"John K. Webb, Julian A. King, Matthew B. Bainbridge, Michael R. Wilczynska, Michael T. Murphy, Victor V. Flambaum","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-09T00:55:36Z","title":"A new analysis of fine-structure constant measurements and modelling errors from quasar absorption lines"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.02536","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:acacd0d0efbd89eed0b6d05e1df8cb99f7f2f532adedea7c7fc6a109ab319356","target":"record","created_at":"2026-05-18T01:19:40Z","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":"3556c4090e1dbb63294d7fac4d879b5a0bd3d21d6fc3de07edb70e5ccaa56531","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-09T00:55:36Z","title_canon_sha256":"af0d067535899747d97748b62c752f30972e9c26817c2522dd3dcb52da68fa62"},"schema_version":"1.0","source":{"id":"1510.02536","kind":"arxiv","version":2}},"canonical_sha256":"f9e053a901e9e800b4bb7a66baed0f3a5fcae96d9da401dde223bceeab754039","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f9e053a901e9e800b4bb7a66baed0f3a5fcae96d9da401dde223bceeab754039","first_computed_at":"2026-05-18T01:19:40.593922Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:40.593922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cyIIXcjO1A19Xcz/lAd8N4quJlSANuaFLY7G+OtGAKuMsWfIlErX399vRjTDDa6r+kW4NE9PpwggCXdM6MGBAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:40.594523Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.02536","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:acacd0d0efbd89eed0b6d05e1df8cb99f7f2f532adedea7c7fc6a109ab319356","sha256:13b0b3c33419a94e697bcbc38e0e35c9195ad3c64b1f488f7937ffe6006770d0"],"state_sha256":"fd19595bb3345f5ecf92a9c6fc55e07fdf3c9eabac69011b79dfd6dc2173fc43"}