Volume 554, June 2013
|Number of page(s)||4|
|Section||Stellar structure and evolution|
|Published online||30 May 2013|
Photometry of the eclipsing cataclysmic variable SDSS J152419.33+220920.0⋆
Observatorio Astronómico Nacional, Instituto de Astronomía, Universidad
Nacional Autónoma de México,
Apartado Postal 877, 22830,
2 Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 70-264, México, D.F., Mexico
e-mail: email@example.com, firstname.lastname@example.org
3 School of Physics & Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, UK
Received: 11 September 2012
Accepted: 28 April 2013
Aims. We present new photometry of the faint (g ~ 19 mag) and poorly studied cataclysmic variable SDSS J152419.33+220920.0, analyze its light curve and provide an accurate ephemeris for this system.
Methods. Time-resolved CCD differential photometry was carried out using the 1.5 m and 0.84 m telescopes at the Observatorio Astronómico Nacional at San Pedro Mártir.
Results. From time-resolved photometry of the system obtained during six nights (covering more than twenty primary eclipse cycles in more than three years), we show that this binary presents a strong primary and a weak secondary modulation. Our light curve analysis shows that only two fundamental frequencies are present, corresponding to the orbital period and a modulation with twice this frequency. We determine the accurate ephemeris of the system to be HJDeclipse = 2 454 967.6750(1) + 0.06531866661(1) E. A double-hump orbital period modulation, a standing feature in several bounce-back systems at quiescence, is present at several epochs. However, we found no other evidence to support the hypothesis that this system belongs to the post-minimum orbital-period systems.
Key words: novae, cataclysmic variables / stars: individual: SDSS J152419.33+220920.0
Photometry described in Table 1 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (220.127.116.11) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/554/A25
© ESO, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.