{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:3HWN2KRK43GUB6DUUFQC435FRS","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":"fb8bb535bb70fb299c717e77b438be63e3eacf5487480e105f91127b1dab96e4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-11-04T06:54:29Z","title_canon_sha256":"be36eae59cceb98eebf8edc7d7ba6f6c09eb7c4623e0ce3168df875d20c04afc"},"schema_version":"1.0","source":{"id":"1511.01224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.01224","created_at":"2026-05-18T01:24:43Z"},{"alias_kind":"arxiv_version","alias_value":"1511.01224v2","created_at":"2026-05-18T01:24:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.01224","created_at":"2026-05-18T01:24:43Z"},{"alias_kind":"pith_short_12","alias_value":"3HWN2KRK43GU","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"3HWN2KRK43GUB6DU","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"3HWN2KRK","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:56ea095a0d98aee76856af388033eadce6ffddd4f0d00703f23bc4c7c9d6388d","target":"graph","created_at":"2026-05-18T01:24:43Z","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 gamma-ray binary system PSR B1259-63/LS 2883 went through periastron in May 2014. We report on the optical spectroscopic monitoring of the system from 33 d before to 78 d after periastron, undertaken with the Southern African Large Telescope (SALT). The H{\\alpha} and He I ({\\lambda}6678) lines exhibit an orbital variation around periastron, with the line strengths reaching a maximum ~13 d after periastron. The line strength is weaker than observed around the previous periastron in 2010. There is also a marked change in the line-strength and asymmetry around the first disc crossing. These o","authors_text":"A. Odendaal, B. van Soelen, I. Sushch, L. Klindt, P.J. Meintjes, P. V\\\"ais\\\"anen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-11-04T06:54:29Z","title":"Optical spectroscopy of PSR B1259-63/LS 2883 during the 2014 periastron passage with the Southern African Large Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.01224","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":"sha256:9ff3bcbbbe110f293e7c1ddd151b344ed32d5e40f7dbad38f7470d69f19c0382","target":"record","created_at":"2026-05-18T01:24:43Z","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":"fb8bb535bb70fb299c717e77b438be63e3eacf5487480e105f91127b1dab96e4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-11-04T06:54:29Z","title_canon_sha256":"be36eae59cceb98eebf8edc7d7ba6f6c09eb7c4623e0ce3168df875d20c04afc"},"schema_version":"1.0","source":{"id":"1511.01224","kind":"arxiv","version":2}},"canonical_sha256":"d9ecdd2a2ae6cd40f874a1602e6fa58c9b635609eb0cac29678cc39b21d70f56","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d9ecdd2a2ae6cd40f874a1602e6fa58c9b635609eb0cac29678cc39b21d70f56","first_computed_at":"2026-05-18T01:24:43.471931Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:43.471931Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Tzq9ufOorom1S0GXDKnWsh/5tAAfcSDMBPKe7fqh0uWj2ISTYYe0QQmVvmFj+C0bTB0EU/hDHoDNpXDuELXSAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:43.472374Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.01224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ff3bcbbbe110f293e7c1ddd151b344ed32d5e40f7dbad38f7470d69f19c0382","sha256:56ea095a0d98aee76856af388033eadce6ffddd4f0d00703f23bc4c7c9d6388d"],"state_sha256":"b5a2d5e11fdcf86b281c636f19a6150c056d296ad1d0976c5fc1e64625ce3253"}