{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:7NVCPNK43AMYRGRKJA4H4EKKBC","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":"acf850654c70a51d1d58dc41e5b91775c04ec8dd0911470a46a8d39c3bc64133","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-27T19:38:57Z","title_canon_sha256":"a56814ea23273871b9c5aee4cfeb3007b201792d8afb745af09728c650ea9529"},"schema_version":"1.0","source":{"id":"1704.08728","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08728","created_at":"2026-05-18T00:45:25Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08728v1","created_at":"2026-05-18T00:45:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08728","created_at":"2026-05-18T00:45:25Z"},{"alias_kind":"pith_short_12","alias_value":"7NVCPNK43AMY","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"7NVCPNK43AMYRGRK","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"7NVCPNK4","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:6b05e5ff8a1f620df6b6c38dbe91689b37d8c73a250058911f8a42021b3a5571","target":"graph","created_at":"2026-05-18T00:45:25Z","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 use Fisher Matrix analysis techniques to forecast the cosmological impact of astrophysical tests of the stability of the fine-structure constant to be carried out by the forthcoming ESPRESSO spectrograph at the VLT (due for commissioning in late 2017), as well by the planned high-resolution spectrograph (currently in Phase A) for the European Extremely Large Telescope. Assuming a fiducial model without $\\alpha$ variations, we show that ESPRESSO can improve current bounds on the E\\\"{o}tv\\\"{o}s parameter---which quantifies Weak Equivalence Principle violations---by up to two orders of magnitu","authors_text":"A. C. O. Leite, C. J. A. P. Martins, C. S. Alves, T. A. Silva","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-27T19:38:57Z","title":"Fisher matrix forecasts for astrophysical tests of the stability of the fine-structure constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08728","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:fce5c787e5884905878d915c16927fdb1bc3734d3c236a09bf2b804ee4245a47","target":"record","created_at":"2026-05-18T00:45:25Z","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":"acf850654c70a51d1d58dc41e5b91775c04ec8dd0911470a46a8d39c3bc64133","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-04-27T19:38:57Z","title_canon_sha256":"a56814ea23273871b9c5aee4cfeb3007b201792d8afb745af09728c650ea9529"},"schema_version":"1.0","source":{"id":"1704.08728","kind":"arxiv","version":1}},"canonical_sha256":"fb6a27b55cd819889a2a48387e114a088775a0d92de79c3dfedaa450d00ac98e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb6a27b55cd819889a2a48387e114a088775a0d92de79c3dfedaa450d00ac98e","first_computed_at":"2026-05-18T00:45:25.424281Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:25.424281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xGIuDNdrQgh7qyT5vbNwshhSrsH3qpw9QWtxsuU7YQ/D9r31lD/+BSidS8ipG2rAAKvclt91SSIFI5PJKOQMBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:25.424745Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.08728","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fce5c787e5884905878d915c16927fdb1bc3734d3c236a09bf2b804ee4245a47","sha256:6b05e5ff8a1f620df6b6c38dbe91689b37d8c73a250058911f8a42021b3a5571"],"state_sha256":"8d3a915f9e6d909032d95e25ea340ad4d1afd7fdd2e21a2724742f56b666e06d"}