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The hidden symbiotic star SU Lyn -- detection of flickering in U band

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arxiv 2206.10151 v2 pith:EV3B623K submitted 2022-06-21 astro-ph.SR

R. K. Zamanov , A. Kostov , M. Moyseev , N. Petrov , Y. M. Nikolov , G. Y. Latev , D. Marchev , S. Boeva
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K. A. Stoyanov M. S. Minev J. Marti V. Radeva E. Sanchez-Ayaso M. F. Bode K. Ilkiewicz G. Nikolov P. L. Luque-Escamilla B. Spassov B. Borisov V. D. Marchev A. Kurtenkov
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classification astro-ph.SR
keywords bandbandsflickeringhiddenintranightstarsymbioticvariability
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We report photometric observations of the hidden symbiotic star SU Lyn in the optical bands. In five nights we detect a weak flickering in U band with amplitude of about 0.05 magnitudes. No intranight variations are found in B, V, g' and r' bands. This is one more indication that the secondary component is a white dwarf accreting at low accretion rate. We also searched for intranight variability of a dozen related object (RR Boo, RT Boo, AM Cyg, AG Peg, BF Cyg, NQ Gem, StHa190, V627 Cas, XX Oph, FS Cet and Y Gem) in which no variability above the observational errors is detected.

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