{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:CPSME5HTSAGQ5A7PFBH7ONDTB5","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":"24a4ab752d53385b208d51ae26856b3c2e25c91c36433bb502aa186797018513","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-12-16T07:30:04Z","title_canon_sha256":"7b2cda5f740ab580ae11ae533d21f0d25bd3c83cfa570c004e716fd29cacc3a4"},"schema_version":"1.0","source":{"id":"astro-ph/0112374","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0112374","created_at":"2026-05-18T01:40:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0112374v1","created_at":"2026-05-18T01:40:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0112374","created_at":"2026-05-18T01:40:43Z"},{"alias_kind":"pith_short_12","alias_value":"CPSME5HTSAGQ","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"CPSME5HTSAGQ5A7P","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"CPSME5HT","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:f14f77e620af91d77866bb10cd875fabdc6bb938c32f8c8a97b5bbadd07d3b0f","target":"graph","created_at":"2026-05-18T01:40:43Z","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":"Intermediate resolution phase-resolved spectra of WZ Sge were obtained on five consecutive nights (July 23 -- 27) covering the initial stage of the 2001 superoutburst. Double-peaked emission lines of He\\textsc{II} at 4686 \\AA, which were absent on July 23, emerged on July 24 together with emission lines of C\\textsc{III} / N\\textsc{III} Bowen blend. Analyses of the He\\textsc{II} emission lines using the Doppler tomography revealed an asymmetric spiral structure on the accretion disk. This finding demonstrates that spiral shocks with a very short orbital period can arise during the initial stage","authors_text":"Daisaku Nogami, Hajime Baba, Katsura Matsumoto, Kazuya Ayani, Kozo Sadakane, Makoto Makita, Masayuki Ioroi, Taichi Kato, Yuji Norimoto","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-12-16T07:30:04Z","title":"Spiral Structure in WZ Sagittae around the 2001 Outburst Maximum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0112374","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:a5e5ce9418170bfddffe9c80abdfca47a7ae6cc6a7c0c0c803b6807550ff5366","target":"record","created_at":"2026-05-18T01:40:43Z","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":"24a4ab752d53385b208d51ae26856b3c2e25c91c36433bb502aa186797018513","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-12-16T07:30:04Z","title_canon_sha256":"7b2cda5f740ab580ae11ae533d21f0d25bd3c83cfa570c004e716fd29cacc3a4"},"schema_version":"1.0","source":{"id":"astro-ph/0112374","kind":"arxiv","version":1}},"canonical_sha256":"13e4c274f3900d0e83ef284ff734730f612d1d55fad53d9cdf36172a8d09b1d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"13e4c274f3900d0e83ef284ff734730f612d1d55fad53d9cdf36172a8d09b1d2","first_computed_at":"2026-05-18T01:40:43.583849Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:43.583849Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zf64r+wwNbl7FwT7CsxVOPRzSAGSr+OlXkwQchs1PWOehdll9khVvHPMJsIxC3RVDZwtvJZHUMHdqsAYromwCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:43.584568Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0112374","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5e5ce9418170bfddffe9c80abdfca47a7ae6cc6a7c0c0c803b6807550ff5366","sha256:f14f77e620af91d77866bb10cd875fabdc6bb938c32f8c8a97b5bbadd07d3b0f"],"state_sha256":"433fcb6f7a37db64ae5d0adc88322f163adfd44045e94c622a0c8c80d8581707"}