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(1999), so these are the three shortest orbital periods among dwarf novae with normal-abundance secondaries.\n  GW Lib has attracted attention as a cataclysmic binary showing apparent ZZ Ceti-type pulsations of the white dwarf primary. Its spectrum shows sharp Ba"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/0206426","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-06-25T00:50:36Z","cross_cats_sorted":[],"title_canon_sha256":"0540717e8a82a72fa79985e5a28f2ebbb09001a72807999686d159e964293796","abstract_canon_sha256":"6ec46507700c5e04506d998386c6946c3d706c3abb594386ec7f33c4cc1893b4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:30:16.637027Z","signature_b64":"CE/pKv/p5RbnkKFWOw9MvmuVeccZhceiNTCOzAK/o66ea3nZQj97ctc57cBtSHgmewXbN8NkyA6RzF6v45xLDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c5068e3a6f900c90dbddcd050d9fd0bb808c609d0eb930fff517be7b1216b43","last_reissued_at":"2026-07-04T16:30:16.636634Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:30:16.636634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Dwarf Novae of Shortest Period","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. 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