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The discoverers, Bailes et al., proposed an ultracompact X-ray binary (UCXB) as the progenitor system. However, the standard UCXB scenario would not produce this system as the time required to reach this orbital period exceeds the current estimate of the age of the Universe. The detached state of the system aggravates the problem. Aims. We want to understand the evolutionary history of PSR J1719-143"},"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":"1203.2919","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-03-13T20:00:02Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"f48c45af4fc7152bef377c104dbcc44b9f2da431c4848ce9408499728ea538d3","abstract_canon_sha256":"2f604fc7521df084730e89e23bbacb6df9427d03c3c43998f143a50c5c0cf2e7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:44:24.205382Z","signature_b64":"4Lk2rkegJ6r97sLrYuz8yZp3ENHWv5xxyXea4gi4v6nGh22euxVmZOvJ2Uoev8Av7EUuefvPYg5clUxBaWmNAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0724e870ab9594bf23e265bdcbf094ce28babb369df8387d1e5569f7e197555f","last_reissued_at":"2026-05-18T03:44:24.204762Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:44:24.204762Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Formation of the planet around the millisecond pulsar J1719-1438","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"G. 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