000002030 001__ 2030
000002030 005__ 20160701171657.0
000002030 0247_ $$2DOI$$a10.1051/0004-6361:20054679
000002030 037__ $$aASTROimport-187
000002030 100__ $$aPapadaki, C.
000002030 245__ $$aPhotometric study of selected cataclysmic variables
000002030 260__ $$c2006
000002030 520__ $$aAims.We present time-resolved photometry of five relatively poorly-studied cataclysmic variables: V1193 Ori, LQ Peg, LD 317, V795 Her, and MCT 2347-3144. Methods: .The observations were made using four 1m-class telescopes for a total of more than 250 h of observation and almost 16 000 data points. For LQ Peg WHT spectroscopic data have been analysed as well. Results: .The light curves show a wide range of variability on different time scales from minutes to months. We detect for the first time a brightness variation of 0.05 mag in amplitude in V1193 Ori on the same timescale as the orbital period, which we interpret as the result of the irradiation of the secondary. A 20-min quasi-periodic oscillation is also detected. The mean brightness of the system has changed by 0.5 mag on a three-month interval, while the flickering was halved. In LQ Peg a 0.05 mag modulation was revealed with a period of about 3 h. The flickering was much smaller, of the order of 0.025 mag. A possible quasi-periodic oscillation could exist near 30 min. For this object, the WHT spectra are single-peaked and do not show any radial-velocity variations. The data of LD 317 show a decrease in the mean magnitude of the system. No periodic signal was detected but this is certainly attributable to the very large flickering observed: between 0.07 and 0.1 mag. For V795 Her, the 2.8-h modulation, thought to be a superhump arising from the precession of the disc, is present. We show that this modulation is not stable in terms of periodicity, amplitude, and phase. Finally, for MCT 2347-3144, a clear modulation is seen in a first dataset obtained in October 2002. This modulation is absent in August 2003, when the system was brighter and showed much more flickering. 
000002030 700__ $$a Boffin, H. M. J.
000002030 700__ $$a Sterken, C.
000002030 700__ $$a Stanishev, V.
000002030 700__ $$a Cuypers, J.
000002030 700__ $$a Boumis, P.
000002030 700__ $$a Akras, S.
000002030 700__ $$a Alikakos, J.
000002030 773__ $$c599-609$$i2$$pAstronomy and Astrophysics$$v456$$y2006
000002030 85642 $$ahttp://esoads.eso.org/abs/2006A%26A...456..599P
000002030 905__ $$apublished in
000002030 980__ $$aREFERD