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The relative increase in the spin-down rate of 36% is unprecedented for B0540-69. No accompanying change in the spin rate is seen, and no change is seen in the pulsed X-ray emission from B0540-69 following the change in the spin-down rate. Such large relative changes in the spin-down rate are seen in the recently discovered class of 'intermittent pulsars', and we compare the properties of B054"},"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":"1506.05765","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-18T18:28:35Z","cross_cats_sorted":[],"title_canon_sha256":"18bd5aba86d0fe1487e64551dd82ae5b28a3541e60361a0466fea6d60202d7c6","abstract_canon_sha256":"efe5c70e2ad63e85ce631f527018f95c56f262661d0f08cf6607cdd2c6104e08"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:52.750662Z","signature_b64":"NQFJ3NDQGQbrSvrAp32RkcwDa/1u83ei8ncBkQ55CTGaZLMB9YQLDLaOLX/NzoACNmyW1Xhq9/wSit/llaCVDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43734990373232b1b1859dc60e09baa52a11af599679226bf71a62b002aeb922","last_reissued_at":"2026-05-18T01:36:52.750054Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:52.750054Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Discovery of a Spin-Down State Change in the LMC Pulsar B0540-69","license":"http://creativecommons.org/licenses/publicdomain/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. 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