Zamanov, R. K.Sánchez Ayaso, EstrellaKurtenkov, A.2023-04-202023-04-202022Zamanov, R. K., Kostov, A., Moyseev, M., Petrov, N., Nikolov, Y. M., Latev, G. Y., Marchev, D., Boeva, S., Stoyanov, K. A., Minev, M. S., Marti, J., Radeva, V., Sanchez-Ayaso, E., Bode, M. F., Ilkiewicz, K., Nikolov, G., Luque-Escamilla, P. L., Spassov, B., Borisov, B., … Kurtenkov, A. (2022). The hidden symbiotic star SU Lyn -- detection of flickering in U band (Version 2). arXiv. https://doi.org/10.48550/ARXIV.2206.10151https://hdl.handle.net/10272/21977We 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.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/StarsBinariesSymbiotic – accretion, accretion discs – white dwarf – starsIindividualSU Lynjournal article10.48550/ARXIV.2206.10151open access22 Física