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It showed a ~0.5 mag slow fading from 1899 to 1903, and brightened back around 1904 on a relatively shorter timescale. The light curve shape of the 1899-1904 fading-brightening event differs from the dust production and dispersion process observed in R Coronae Borealis (RCB) stars, which usually has a faster fading and slower recover"},"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":"1106.0003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-31T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"a7ae64823f7801928c9ac6fbd08fc0f46b990e47213c1070f94866ac609ec292","abstract_canon_sha256":"577d3591743e1b173380adf086abe90ed1ac8697ed8ed08dd0d574f060d49c50"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:45.234849Z","signature_b64":"eG3J5LQqcd48aKULrDXLE+ZVV2wQCDqhRP/mp8aFn+0Aui2bq4CJhapjbLo7f4nCOoS4voanj6dW4olOeej0Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a03676ca8a188f14e87bf2e9f558c59e91f16b2bdd5c325a9f5cd55566d2f03","last_reissued_at":"2026-05-18T02:01:45.233909Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:45.233909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"DASCH on KU Cyg: a ~5 year dust accretion event in ~1900","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Edward Los, Jonathan Grindlay, Mathieu Servillat, Sumin Tang","submitted_at":"2011-05-31T20:00:03Z","abstract_excerpt":"KU Cyg is an eclipsing binary consisting of a F-type star accreting through a large accretion disk from a K5III red giant. 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