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The publicly available WASP data are analysed to determine the orbital periods of the cataclysmic variables V378 Peg, SDSS J171456.78+585128.3 and ASAS 150946-2147.7.

Solar and Stellar Astrophysics · Physics 2011-03-17 Patrick Wils

We present the results obtained from unfiltered photometric CCD observations of the newly discovered cataclysmic variable SDSS J040714.78-064425.1 made during 7 nights in November 2003. We establish the dwarf nova nature of the object as it…

Astrophysics · Physics 2009-11-10 T. Ak , A. Retter , A. Liu , H. H. Esenoglu

We report the discovery of a new catacysmic variable system, RXJ051541+0104.6. The optical spectrum has a blue continuum with superposed H~I and He~I and II emission lines. The soft X-ray spectrum is well fit with a 50~eV black body. The…

Astrophysics · Physics 2009-10-22 F. M. Walter , S. J. Wolk , N. R. Adams

PHL 1445 is found to be an eclipsing cataclysmic variable with an orbital period of 76.3 minutes. GALEX J003535.7+462353 is a new eclipsing dwarf nova with an orbital period of 4.13 hours. Both objects show deep eclipses with an amplitude…

Solar and Stellar Astrophysics · Physics 2011-03-31 Patrick Wils , Tom Krajci , Franz-Josef Hambsch , Eddy Muyllaert

We report the discovery and characterization of a new cataclysmic variable (CV), 2CXO J050740.7-091337 (hereafter 2CXO J0507), identified using the X-ray main sequence through a cross-match between the Chandra Source Catalogue 2.1 and Gaia…

High Energy Astrophysical Phenomena · Physics 2026-05-07 Ilkham Galiullin , Vladislav Dodon , Antonio C. Rodriguez , Paula Szkody , Askar Sibgatullin

We present optical photometric and spectroscopic observations of two Cataclysmic Variables (CVs), namely RBS 0490 and SDSS J075939.79+191417.3. The optical variations of RBS 0490 have been found to occur at the period of 1.689$\pm$0.001 hr…

Solar and Stellar Astrophysics · Physics 2022-04-27 Arti Joshi , J. C. Pandey , Nikita Rawat , Ashish Raj , Wei Wang , H. P. Singh

We analyzed a Kepler light curve of KIC 8751494, a recently recognized novalike cataclysmic variable in the Kepler field. We detected a stable periodicity of 0.114379(1) d, which we identified as being the binary's orbital period. The…

Solar and Stellar Astrophysics · Physics 2015-06-15 Taichi Kato , Hiroyuki Maehara

We report on the photometric analysis of the poorly studied cataclysmic variable in Ophiuchus 1RXS J174320.1-042953 (DDE 11). Results of the monitoring with the Bradford Robotic Telescope (BRT) are presented, as well as the time-resolved…

Solar and Stellar Astrophysics · Physics 2012-07-27 D. V. Denisenko , F. Martinelli

We present observations and analyses of five little-studied cataclysmic binary stars in the southern celestial hemisphere. Our new observations are from the South African Astronomical Observatory. The objects and salient results are as…

We report a photometric and spectroscopic study of the peculiar cataclysmic variable SDSS 1507+52. The star shows very deep eclipses on the 67 minute orbital period, and those eclipses are easily separable into white-dwarf and hot-spot…

Astrophysics · Physics 2009-11-13 J. Patterson , J. R. Thorstensen , C. Knigge

We report the discovery of 11 new cataclysmic variable (CV) candidates by the Isaac Newton Telescope (INT) Photometric H alpha Survey of the northern Galactic plane (IPHAS). Three of the systems have been the subject of further follow-up…

We observed a new and poorly studied cataclysmic variable (CV) SDSS J123813.73-033933.0 to determine its classification and binary parameters. Simultaneous time-resolved photometric and spectroscopic observations were carried out to conduct…

Astrophysics · Physics 2009-11-11 S. V. Zharikov , G. H. Tovmassian , R. Napiwotzki , R. Michel , V. Neustroev

We present photometric and spectroscopic observations of the cataclysmic variable MASTER OT J132104.04+560957.8 which strongly indicate that it is a polar with an orbital period of 91 minutes. The optical light curve shows two maxima and…

Solar and Stellar Astrophysics · Physics 2014-12-30 Colin Littlefield , Peter Garnavich , Katrina Magno , Marc Murison , Shanel Deal , Colin McClelland , Benjamin Rose

We report follow-up spectroscopy of 29 cataclysmic variables from the Sloan Digital Sky Survey (SDSS), 22 of which were discovered by SDSS and seven other previously known systems that were recovered in SDSS. The periods for 16 of these…

Strong selection effects are present in observational samples of cataclysmic variables (CVs), complicating comparisons to theoretical predictions. The selection criteria used to define most CV samples discriminate heavily against the…

Astrophysics · Physics 2009-11-13 Magaretha L. Pretorius , Christian Knigge

Continuing our work from Paper I (Southworth et al., 2006) we present medium-resolution spectroscopy and broad-band photometry of seven cataclysmic variables (CVs) discovered by the SDSS. For six of these objects we derive accurate orbital…

We report follow-up studies of 35 recently-discovered cataclysmic variables (CVs), 32 of which were found in large, automated synoptic sky surveys. The objects were selected for observational tractability. For 34 of the objects we present…

Solar and Stellar Astrophysics · Physics 2016-12-14 John R. Thorstensen , Erek H. Alper , Kathryn E. Weil

We present photometry of nine cataclysmic variable stars identified by the Sloan Digital Sky Survey, aimed at measuring the orbital periods of these systems. Four of these objects show deep eclipses, from which we measure their orbital…

Solar and Stellar Astrophysics · Physics 2015-05-14 John Southworth , C. M. Copperwheat , B T Gansicke , S Pyrzas

Time-resolved optical photometry, complemented by TESS data and long-term survey light curves, reveals that the transient object CRTS SSS100505 J093417-174421 is an eclipsing novalike cataclysmic variable of the VY~Scl subtype, with an…

Solar and Stellar Astrophysics · Physics 2026-03-17 R. Baptista , A. Bruch , R. Lopes de Oliveira , C. V. Rodrigues , A. S. Oliveira , I. J. Lima

We have observed several magnetic cataclysmic variables located in the range between 2 and 3 hours, known as the period gap. This work was prompted by the recent discovery of RX J1554.2+2721. It has 2.54 hours orbital period and shows…

Astrophysics · Physics 2007-05-23 G. Tovmassian , S. Zharikov , R. Mennickent , J. Greiner