An extensive photometric study of the recently discovered intermediate polar V515 And (XSS J00564+4548)

Abstract

We report results of photometry of the intermediate polar V515 And. The observations were obtained over 33 nights in 2008 and 2009. The total duration of the observations was 233 h. We clearly detected two oscillations with periods of 465.48493\pm0.00007$ and 488.61822\pm0.00009 s, which may be the white dwarf spin period and the orbital sideband. The semi-amplitudes of the oscillations are 25 and 20 mmag, accordingly. The oscillation with a period of 465.48493 s has a stable smooth asymmetric pulse profile whereas the pulse profile of the oscillation with a period of 488.61822 s reveals significant changes from a quasi-sinusoidal shape to a shape somewhat resembling a light-curve of an eclipsing binary. Two detected oscillations imply an orbital period of 2.73 h. V515 And is one of the most rapidly spinning intermediate polars with orbital periods less than 3 h and may be not in spin equilibrium. This can be proved by future observations. For this purpose we obtained oscillation ephemerises with a formal shelf life of about 100 yr. (a 1 sigma confidence level).

10 pages, 8 figures, will be published in MNRAS

References in corpus (16)

• The 3rd IBIS/ISGRI soft gamma-ray survey catalog
• The spin periods and magnetic moments of white dwarfs in magnetic cataclysmic variables
• HS2331+3905: The cataclysmic variable that has it all
• The Spectra and Variability of X-ray Sources in a Deep Chandra Observation of the Galactic Center
• The Accretion Flows and Evolution of Magnetic Cataclysmic Variables
• Cataclysmic variables from a ROSAT/2MASS selection I: Four new intermediate polars
• Time-resolved optical observations of five cataclysmic variables detected by INTEGRAL
• The defining characteristics of Intermediate Polars - the case of three candidate systems
• RXTE determination of the intermediate polar status of XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859
• Why does the intermediate polar V405 Aurigae show a double-peaked spin pulse?
• On the nature of the X-ray source in GK Per
• XMM-Newton observations of the complex spin pulse of the intermediate polar PQ~Geminorum
• XSS J00564+4548 and IGR J00234+6141 -- new cataclysmic variables from RXTE and INTEGRAL all sky surveys
• HS 0943+1404, a true intermediate polar
• The changing accretion states of the intermediate polar MU Camelopardalis
• The Intermediate Polar EI UMa: A Pre-Polar Cataclysmic Variable

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• V515 And: An Intermediate Polar in the Period Gap Exhibiting Outbursts
• Investigating the low-flux states in six Intermediate Polars