{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SFMZMNS7D6L4FC63GOS56FHM56","short_pith_number":"pith:SFMZMNS7","canonical_record":{"source":{"id":"1905.10436","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-24T20:28:05Z","cross_cats_sorted":[],"title_canon_sha256":"a3a8ca1edde4bb4b23190b97964b19af25ae4885950ce6c2144d1df898fd510c","abstract_canon_sha256":"174469394ab70f950bd6eb3ec5976e951b3366001ff14401a096e08a8246ad01"},"schema_version":"1.0"},"canonical_sha256":"915996365f1f97c28bdb33a5df14ecefa2b7e85b2812e15d23d58e4819ec8fb9","source":{"kind":"arxiv","id":"1905.10436","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.10436","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"arxiv_version","alias_value":"1905.10436v1","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.10436","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"pith_short_12","alias_value":"SFMZMNS7D6L4","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SFMZMNS7D6L4FC63","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SFMZMNS7","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SFMZMNS7D6L4FC63GOS56FHM56","target":"record","payload":{"canonical_record":{"source":{"id":"1905.10436","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-24T20:28:05Z","cross_cats_sorted":[],"title_canon_sha256":"a3a8ca1edde4bb4b23190b97964b19af25ae4885950ce6c2144d1df898fd510c","abstract_canon_sha256":"174469394ab70f950bd6eb3ec5976e951b3366001ff14401a096e08a8246ad01"},"schema_version":"1.0"},"canonical_sha256":"915996365f1f97c28bdb33a5df14ecefa2b7e85b2812e15d23d58e4819ec8fb9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:31.743136Z","signature_b64":"pxBd7h+lv1SWu8xMkXl4JEHNUXWBhXzg4qrNg2BPATJOfrLB2ARDGEtTRtmA//v/jaCBkxZiS6Z9COtJITO/Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"915996365f1f97c28bdb33a5df14ecefa2b7e85b2812e15d23d58e4819ec8fb9","last_reissued_at":"2026-05-17T23:40:31.742674Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:31.742674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.10436","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:40:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bSTJWaAB5K3pFnbLJD5b58owkmwdRqhmEXNsQn/hik+M1SCeYIIle3GxCnZTVQ7gVFzeZYh79eeIW+exmdMWBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:17:42.381152Z"},"content_sha256":"184ce522871083653cedcd46872496a502420292a0d682a54d0bad2a884eaa5c","schema_version":"1.0","event_id":"sha256:184ce522871083653cedcd46872496a502420292a0d682a54d0bad2a884eaa5c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SFMZMNS7D6L4FC63GOS56FHM56","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Speckle interferometry at SOAR in 2018","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andrei Tokovinin, Brian D. Mason, Cesar Briceno, Elliott P. Horch, Rene A. Mendez","submitted_at":"2019-05-24T20:28:05Z","abstract_excerpt":"The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2018 are given, totaling 3097 measurements of 2427 resolved pairs with separations from 11 mas to 5.9\" (median 0.15\", magnitude difference up to 7 mag) and non-resolutions of 624 targets. This work continues our long-term speckle program. Its main goal is to monitor orbital motion of close binaries, including members of high-order hierarchies and Hipparcos pairs in the solar neighborhood. Also, pre-main-sequence stars in the Orion OB1 association were surveyed, resolving 26 out "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.10436","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:40:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o1oFGJ06WPDi5WhyPOEP0c/lhf697EgXpwa+MOWOPKcIA4m7rVqaeP7+x01cRqVvAtwHK6qZXmw0gxjCRVM6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:17:42.381825Z"},"content_sha256":"7b9f5ebf8725e101be915563a243ca911676f64fee19e2fde8b59d9f95825566","schema_version":"1.0","event_id":"sha256:7b9f5ebf8725e101be915563a243ca911676f64fee19e2fde8b59d9f95825566"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SFMZMNS7D6L4FC63GOS56FHM56/bundle.json","state_url":"https://pith.science/pith/SFMZMNS7D6L4FC63GOS56FHM56/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SFMZMNS7D6L4FC63GOS56FHM56/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T22:17:42Z","links":{"resolver":"https://pith.science/pith/SFMZMNS7D6L4FC63GOS56FHM56","bundle":"https://pith.science/pith/SFMZMNS7D6L4FC63GOS56FHM56/bundle.json","state":"https://pith.science/pith/SFMZMNS7D6L4FC63GOS56FHM56/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SFMZMNS7D6L4FC63GOS56FHM56/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SFMZMNS7D6L4FC63GOS56FHM56","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":"174469394ab70f950bd6eb3ec5976e951b3366001ff14401a096e08a8246ad01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-24T20:28:05Z","title_canon_sha256":"a3a8ca1edde4bb4b23190b97964b19af25ae4885950ce6c2144d1df898fd510c"},"schema_version":"1.0","source":{"id":"1905.10436","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.10436","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"arxiv_version","alias_value":"1905.10436v1","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.10436","created_at":"2026-05-17T23:40:31Z"},{"alias_kind":"pith_short_12","alias_value":"SFMZMNS7D6L4","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SFMZMNS7D6L4FC63","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SFMZMNS7","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:7b9f5ebf8725e101be915563a243ca911676f64fee19e2fde8b59d9f95825566","target":"graph","created_at":"2026-05-17T23:40:31Z","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":"The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2018 are given, totaling 3097 measurements of 2427 resolved pairs with separations from 11 mas to 5.9\" (median 0.15\", magnitude difference up to 7 mag) and non-resolutions of 624 targets. This work continues our long-term speckle program. Its main goal is to monitor orbital motion of close binaries, including members of high-order hierarchies and Hipparcos pairs in the solar neighborhood. Also, pre-main-sequence stars in the Orion OB1 association were surveyed, resolving 26 out ","authors_text":"Andrei Tokovinin, Brian D. Mason, Cesar Briceno, Elliott P. Horch, Rene A. Mendez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-24T20:28:05Z","title":"Speckle interferometry at SOAR in 2018"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.10436","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":"sha256:184ce522871083653cedcd46872496a502420292a0d682a54d0bad2a884eaa5c","target":"record","created_at":"2026-05-17T23:40:31Z","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":"174469394ab70f950bd6eb3ec5976e951b3366001ff14401a096e08a8246ad01","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-24T20:28:05Z","title_canon_sha256":"a3a8ca1edde4bb4b23190b97964b19af25ae4885950ce6c2144d1df898fd510c"},"schema_version":"1.0","source":{"id":"1905.10436","kind":"arxiv","version":1}},"canonical_sha256":"915996365f1f97c28bdb33a5df14ecefa2b7e85b2812e15d23d58e4819ec8fb9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"915996365f1f97c28bdb33a5df14ecefa2b7e85b2812e15d23d58e4819ec8fb9","first_computed_at":"2026-05-17T23:40:31.742674Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:31.742674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pxBd7h+lv1SWu8xMkXl4JEHNUXWBhXzg4qrNg2BPATJOfrLB2ARDGEtTRtmA//v/jaCBkxZiS6Z9COtJITO/Ag==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:31.743136Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.10436","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:184ce522871083653cedcd46872496a502420292a0d682a54d0bad2a884eaa5c","sha256:7b9f5ebf8725e101be915563a243ca911676f64fee19e2fde8b59d9f95825566"],"state_sha256":"a7019a78b9db72946fdc6377daf18686f693e5be81d05d7586de57d6a3195ef1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yEMBSjR4cab3XHoizifPA1AouPJNk7vnnOds41prxzuXxLuW5LkYSlZqUowC0OrL1uOo1e5O5dFHz439tWrHCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:17:42.385223Z","bundle_sha256":"d1ecc63e418d101d3cf9101f444bb631a1a3f428fae8b2450e8fd0fd30212751"}}