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One year later the system had fallen in brightness by a further 2.5 mag, showed deep eclipses with a period of 2.6687 h, and the 261.9 s modulation at a reduced amplitude. There is often power near the `subharmonic' at 524 s, showing that the shorter periods observed are actually first harmonics.\n  V597 Pup is thus an intermediate polar and"},"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":"0905.0325","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-05-04T08:42:05Z","cross_cats_sorted":[],"title_canon_sha256":"c139844e68d31df2e69fdebaf36d81b8e0a42de6c7b691950ae3265600b31233","abstract_canon_sha256":"810e302a59d2e5a1f89e26af28209fbb16208e44a3db575ac8e676bbd971ad61"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:48.006879Z","signature_b64":"szuo4PAdcLHAtY9fix1Ok5RVBwPbjPPOlJdlB+YJNP98oOR71zhHXJDaMyP8bMC+ZwsnlSh8aiiC5ixheVunDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58016e6606a485e3b27cb5609ad2912e6927071f8655d9a0cb385b7d9183f66a","last_reissued_at":"2026-05-18T02:13:48.006061Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:48.006061Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The eclipsing Intermediate Polar V597 Pup (Nova Puppis 2007)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Brian Warner, Patrick A. 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