{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EFHBHFJ4WQLGRVI6WYUQ4MHB3M","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":"88f8d0af134b1db72be119a4ac003851ff56aeacb982d9691efd198bb851a607","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-31T20:10:22Z","title_canon_sha256":"7ae9cab6b0d4a9d1d9607f93fc3168d08c9c8bc4ab676db183983675bde7a6a6"},"schema_version":"1.0","source":{"id":"1509.00015","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00015","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00015v1","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00015","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"pith_short_12","alias_value":"EFHBHFJ4WQLG","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EFHBHFJ4WQLGRVI6","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EFHBHFJ4","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:a9cd1f1401bea62cc554db36f802c2d6c347a83cd937cdfd2de8bd9c2304221c","target":"graph","created_at":"2026-05-18T01:31:31Z","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":"Sirius has always attracted a lot of scientific interest, especially after the discovery of a companion white dwarf at the end of the 19th century. Very early on, the existence of a potential third body was put forward to explain some of the observed properties of the system. We present new coronagraphic observations obtained with VLT/SPHERE that explore, for the very first time, the innermost regions of the system down to 0.2\" (0.5 AU) from Sirius A. Our observations cover the near-infrared from 0.95 to 2.3 $\\mu$m and they offer the best on-sky contrast ever reached at these angular separatio","authors_text":"A. Vigan, C. Gry, C. Moutou, D. Homeier, D. Mesa, F. Allard, G. Salter","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-31T20:10:22Z","title":"High-contrast imaging of Sirius~A with VLT/SPHERE: Looking for giant planets down to one astronomical unit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00015","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:eb057aaf767e8106382254e20ae7ae490a07dc0d3a171ab1e44ad1d9996ee059","target":"record","created_at":"2026-05-18T01:31:31Z","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":"88f8d0af134b1db72be119a4ac003851ff56aeacb982d9691efd198bb851a607","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-08-31T20:10:22Z","title_canon_sha256":"7ae9cab6b0d4a9d1d9607f93fc3168d08c9c8bc4ab676db183983675bde7a6a6"},"schema_version":"1.0","source":{"id":"1509.00015","kind":"arxiv","version":1}},"canonical_sha256":"214e13953cb41668d51eb6290e30e1db33a58259be6ce9e55c2532cb3b49704e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"214e13953cb41668d51eb6290e30e1db33a58259be6ce9e55c2532cb3b49704e","first_computed_at":"2026-05-18T01:31:31.002480Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:31:31.002480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zWJFVaQhRanVUEv6w9KQenMia4THGE2oPHLRVWZgPG6syMwdMm6TD+hJ7jsWX51hi47Ym9iLrb+/cd0i3f+gDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:31:31.003024Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.00015","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb057aaf767e8106382254e20ae7ae490a07dc0d3a171ab1e44ad1d9996ee059","sha256:a9cd1f1401bea62cc554db36f802c2d6c347a83cd937cdfd2de8bd9c2304221c"],"state_sha256":"03306d1505d29a807085e9bb6ff813565a2b7585ee636c86190e645fbaa3c3ca"}