{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7LXZNP5FDYDIFCV4ALWBHVFW3B","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":"db9fc74c3be9bc2b73eabcb97760a18e2c07e045457e957a5052f11f97fc7800","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-05-25T13:54:37Z","title_canon_sha256":"ff12bfa1b1193878c2e8981aaf3db3a802074b3d3119e7013328c315e37aadb2"},"schema_version":"1.0","source":{"id":"2005.12114","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.12114","created_at":"2026-07-05T01:19:06Z"},{"alias_kind":"arxiv_version","alias_value":"2005.12114v2","created_at":"2026-07-05T01:19:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.12114","created_at":"2026-07-05T01:19:06Z"},{"alias_kind":"pith_short_12","alias_value":"7LXZNP5FDYDI","created_at":"2026-07-05T01:19:06Z"},{"alias_kind":"pith_short_16","alias_value":"7LXZNP5FDYDIFCV4","created_at":"2026-07-05T01:19:06Z"},{"alias_kind":"pith_short_8","alias_value":"7LXZNP5F","created_at":"2026-07-05T01:19:06Z"}],"graph_snapshots":[{"event_id":"sha256:a7138d8f73f52a2fb364dc4ed6e5d680542ec71c3baa79b5368bbe431b3ab07e","target":"graph","created_at":"2026-07-05T01:19:06Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2005.12114/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We aim to confirm the presence of Proxima b using independent measurements obtained with the new ESPRESSO spectrograph, and refine the planetary parameters taking advantage of its improved precision. We analysed 63 spectroscopic ESPRESSO observations of Proxima taken during 2019. We obtained radial velocity measurements with a typical radial velocity photon noise of 26 cm/s. We ran a joint MCMC analysis on the time series of the radial velocity and full-width half maximum of the cross-correlation function to model the planetary and stellar signals present in the data, applying Gaussian process","authors_text":"A. Bianco, A. Cabral, A. Fragoso, A. Manescau, A. Mehner, A. Modigliani, A. Oliveira, A. Segovia, A. Sozzetti, A. Su\\'arez Mascare\\~no, A. Zanutta, B. Delabre, B. Lavie, C. Allende Prieto, C. Broeng, C. Cumani, C. J. A. P. Martins, C. Lovis, C. Maire, D. Alves, D. Ehrenreich, D. M\\'egevand, D. Sosnoswska, E. Mueller, E. Pall\\'e, E. Poretti, E. Redaelli, F. Bouchy, F. Murgas, F. Pepe, F. Tenegi, F. Zerbi, G. Avila, G. Calderone, G. Cupani, G. Lo Curto, G. Micela, G. Pariani, I. Coretti, I. Hughes, J. Coelho, J. I. Gonz\\'alez Hern\\'andez, J. Knusdrtrup, J. Lillo-Box, J. Lizon, J. L. Rasilla, J. P. Faria, K. Ferber, L. Genolet, L. Oggioni, L. Pasquini, M. Abreo, M. Affolter, M. Aliverti, M. Amate, M. A. Monteiro, M. Damasso, M. Genoni, M. J. P. F. G. Monteiro, M. Landoni, M. Moschetti, M. Riva, M. R. Zapatero Osorio, N. C. Santos, N. J. Nunes, O. Iwert, P. Conconi, P. Di Marcantonio, P. Figueira, P. Molaro, P. Santin, P. Santos, P. Span\\`o, R. Allart, R. Cirami, R. G\\'enova Santos, R. Rebolo, S. C. C. Barros, S. Cristiano, S. Deiries, S. Hojjatpanah, S. Santana Tschudi, S. Sousa, S. Udry, T. Bandi, V. Adibekyan, V. Baldini, V. D'Odorico, W. Benz, X. Dumusque, Y. Alibert","cross_cats":["astro-ph.IM","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-05-25T13:54:37Z","title":"Revisiting Proxima with ESPRESSO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.12114","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":"sha256:8f9fd653b1f133c9ed7f9d28d6897b7e4f116fda9f37010be708a50e5970a182","target":"record","created_at":"2026-07-05T01:19:06Z","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":"db9fc74c3be9bc2b73eabcb97760a18e2c07e045457e957a5052f11f97fc7800","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-05-25T13:54:37Z","title_canon_sha256":"ff12bfa1b1193878c2e8981aaf3db3a802074b3d3119e7013328c315e37aadb2"},"schema_version":"1.0","source":{"id":"2005.12114","kind":"arxiv","version":2}},"canonical_sha256":"faef96bfa51e06828abc02ec13d4b6d85d40fb905bac002b6a9b4eeacbee8658","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"faef96bfa51e06828abc02ec13d4b6d85d40fb905bac002b6a9b4eeacbee8658","first_computed_at":"2026-07-05T01:19:06.629929Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:19:06.629929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"20rZlcuEJsEzT4QZ/uFHCaydPSbqIGmDGOEQVOskb7fhsRdE3L1Zcjeq9xQIFjx/vrPvPGBJHTTIBo7xu6PjDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:19:06.630385Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.12114","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8f9fd653b1f133c9ed7f9d28d6897b7e4f116fda9f37010be708a50e5970a182","sha256:a7138d8f73f52a2fb364dc4ed6e5d680542ec71c3baa79b5368bbe431b3ab07e"],"state_sha256":"9ceae0b0959916088eb441303c518f5e0e19b6baf763bec03c01d5afbdaf4d0d"}