{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:5XUGSPU4Q7T6W7TOSRSEQGH5VW","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":"031682bb56cb18eb22a452275badbfbc2c0e33436204f1bc57b205e5e1b00641","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-07T15:47:10Z","title_canon_sha256":"3977cefbb12dbe79ef69b94623f924ea97002b9925df8b559de509832aa6dcd1"},"schema_version":"1.0","source":{"id":"0908.1078","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.1078","created_at":"2026-05-18T02:12:36Z"},{"alias_kind":"arxiv_version","alias_value":"0908.1078v1","created_at":"2026-05-18T02:12:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.1078","created_at":"2026-05-18T02:12:36Z"},{"alias_kind":"pith_short_12","alias_value":"5XUGSPU4Q7T6","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5XUGSPU4Q7T6W7TO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5XUGSPU4","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:204f41fab7772c6344bc3c5ec512a03536e8c07b5c76addb46d1c5f41d8127de","target":"graph","created_at":"2026-05-18T02:12:36Z","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 present light curves and time-resolved spectroscopy of the three candidate pre-cataclysmic binaries EC 12477-1738, EC 13349-3237, and EC 14329-1625. We determine the orbital period for EC 12477-1738 as 0.362 d, thus confirming the value previously reported. A similar period, P=0.350 d, is found for EC 14329-1625. Both systems incorporate a medium-hot white dwarf (T = 15000-20000 K) and an M3V secondary star. The third pre-CV, EC 13349-3237, is the youngest of the three, with a hot WD (T ~ 35000 K), and it also has the longest period P=0.469 d. It furthermore turns out to be one of the still","authors_text":"B. T. Gaensicke, C. Papadaki, C. Tappert, I. Toledo, J. Southworth, M. Zorotovic, R. E. Mennickent","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-07T15:47:10Z","title":"Observations of three pre-cataclysmic variables from the Edinburgh-Cape Blue Object Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.1078","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:d7d013d2fb809f8576c397426722162201be596d064f5c946f5622ec0c3b3bc0","target":"record","created_at":"2026-05-18T02:12:36Z","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":"031682bb56cb18eb22a452275badbfbc2c0e33436204f1bc57b205e5e1b00641","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-07T15:47:10Z","title_canon_sha256":"3977cefbb12dbe79ef69b94623f924ea97002b9925df8b559de509832aa6dcd1"},"schema_version":"1.0","source":{"id":"0908.1078","kind":"arxiv","version":1}},"canonical_sha256":"ede8693e9c87e7eb7e6e94644818fdad9ec23a6a058a3fa9033f5098b79d2feb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ede8693e9c87e7eb7e6e94644818fdad9ec23a6a058a3fa9033f5098b79d2feb","first_computed_at":"2026-05-18T02:12:36.639441Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:36.639441Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HnHwMazjl2+X9A3muZW4nENiR+O/wcfqoPAHuIxYM88+rCC9QeCYP8LUG8pMVYx70cQQcDHAnW7dH6Q33FbRBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:36.640148Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.1078","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d7d013d2fb809f8576c397426722162201be596d064f5c946f5622ec0c3b3bc0","sha256:204f41fab7772c6344bc3c5ec512a03536e8c07b5c76addb46d1c5f41d8127de"],"state_sha256":"e548cc9e83efd85b8c59bbb3ce1af91ea64b06192bf1ac24eccdcc8b584c3d8f"}